diff options
| -rw-r--r-- | doc/manual/command-ref/nix-hash.xml | 4 | ||||
| -rw-r--r-- | doc/manual/introduction/about-nix.xml | 2 | ||||
| -rw-r--r-- | src/linenoise/ConvertUTF.cpp | 542 | ||||
| -rwxr-xr-x | src/linenoise/ConvertUTF.h | 162 | ||||
| -rw-r--r-- | src/linenoise/LICENSE | 79 | ||||
| -rw-r--r-- | src/linenoise/linenoise.c | 1199 | ||||
| -rw-r--r-- | src/linenoise/linenoise.cpp | 3457 | ||||
| -rw-r--r-- | src/linenoise/linenoise.h | 82 | ||||
| -rw-r--r-- | src/linenoise/wcwidth.cpp | 315 | ||||
| -rw-r--r-- | src/nix/local.mk | 2 | ||||
| -rw-r--r-- | src/nix/repl.cc | 2 |
11 files changed, 4582 insertions, 1264 deletions
diff --git a/doc/manual/command-ref/nix-hash.xml b/doc/manual/command-ref/nix-hash.xml index 8d8213c0bca8..80263e18e339 100644 --- a/doc/manual/command-ref/nix-hash.xml +++ b/doc/manual/command-ref/nix-hash.xml @@ -126,9 +126,9 @@ cryptographic hash as <literal>nix-store --dump <para>Computing the same hash as <command>nix-prefetch-url</command>: <screen> -$ nix-prefetch-url file://<(echo test) +$ nix-prefetch-url file://<(echo test) 1lkgqb6fclns49861dwk9rzb6xnfkxbpws74mxnx01z9qyv1pjpj -$ nix-hash --type sha256 --flat --base32 <(echo test) +$ nix-hash --type sha256 --flat --base32 <(echo test) 1lkgqb6fclns49861dwk9rzb6xnfkxbpws74mxnx01z9qyv1pjpj </screen> </para> diff --git a/doc/manual/introduction/about-nix.xml b/doc/manual/introduction/about-nix.xml index 7cb124033f3e..83a2b6786ac0 100644 --- a/doc/manual/introduction/about-nix.xml +++ b/doc/manual/introduction/about-nix.xml @@ -262,7 +262,7 @@ xlink:href="http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html">GNU LGPLv2.1 or (at your option) any later version</link>.</para> <para>Nix uses the <link -xlink:href="https://github.com/antirez/linenoise">linenoise +xlink:href="https://github.com/arangodb/linenoise-ng">linenoise-ng library</link>, which has the following license:</para> <programlisting><xi:include href="../../../src/linenoise/LICENSE" parse="text" /></programlisting> diff --git a/src/linenoise/ConvertUTF.cpp b/src/linenoise/ConvertUTF.cpp new file mode 100644 index 000000000000..f7e5915d5e8f --- /dev/null +++ b/src/linenoise/ConvertUTF.cpp @@ -0,0 +1,542 @@ +/* + * Copyright 2001-2004 Unicode, Inc. + * + * Disclaimer + * + * This source code is provided as is by Unicode, Inc. No claims are + * made as to fitness for any particular purpose. No warranties of any + * kind are expressed or implied. The recipient agrees to determine + * applicability of information provided. If this file has been + * purchased on magnetic or optical media from Unicode, Inc., the + * sole remedy for any claim will be exchange of defective media + * within 90 days of receipt. + * + * Limitations on Rights to Redistribute This Code + * + * Unicode, Inc. hereby grants the right to freely use the information + * supplied in this file in the creation of products supporting the + * Unicode Standard, and to make copies of this file in any form + * for internal or external distribution as long as this notice + * remains attached. + */ + +/* --------------------------------------------------------------------- + + Conversions between UTF32, UTF-16, and UTF-8. Source code file. + Author: Mark E. Davis, 1994. + Rev History: Rick McGowan, fixes & updates May 2001. + Sept 2001: fixed const & error conditions per + mods suggested by S. Parent & A. Lillich. + June 2002: Tim Dodd added detection and handling of incomplete + source sequences, enhanced error detection, added casts + to eliminate compiler warnings. + July 2003: slight mods to back out aggressive FFFE detection. + Jan 2004: updated switches in from-UTF8 conversions. + Oct 2004: updated to use UNI_MAX_LEGAL_UTF32 in UTF-32 conversions. + + See the header file "ConvertUTF.h" for complete documentation. + +------------------------------------------------------------------------ */ + +#include "ConvertUTF.h" +#ifdef CVTUTF_DEBUG +#include <stdio.h> +#endif + +namespace linenoise_ng { + +static const int halfShift = 10; /* used for shifting by 10 bits */ + +static const UTF32 halfBase = 0x0010000UL; +static const UTF32 halfMask = 0x3FFUL; + +#define UNI_SUR_HIGH_START (UTF32)0xD800 +#define UNI_SUR_HIGH_END (UTF32)0xDBFF +#define UNI_SUR_LOW_START (UTF32)0xDC00 +#define UNI_SUR_LOW_END (UTF32)0xDFFF +#define false 0 +#define true 1 + +/* --------------------------------------------------------------------- */ + +ConversionResult ConvertUTF32toUTF16 ( + const UTF32** sourceStart, const UTF32* sourceEnd, + char16_t** targetStart, char16_t* targetEnd, ConversionFlags flags) { + ConversionResult result = conversionOK; + const UTF32* source = *sourceStart; + char16_t* target = *targetStart; + while (source < sourceEnd) { + UTF32 ch; + if (target >= targetEnd) { + result = targetExhausted; break; + } + ch = *source++; + if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */ + /* UTF-16 surrogate values are illegal in UTF-32; 0xffff or 0xfffe are both reserved values */ + if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) { + if (flags == strictConversion) { + --source; /* return to the illegal value itself */ + result = sourceIllegal; + break; + } else { + *target++ = UNI_REPLACEMENT_CHAR; + } + } else { + *target++ = (UTF16)ch; /* normal case */ + } + } else if (ch > UNI_MAX_LEGAL_UTF32) { + if (flags == strictConversion) { + result = sourceIllegal; + } else { + *target++ = UNI_REPLACEMENT_CHAR; + } + } else { + /* target is a character in range 0xFFFF - 0x10FFFF. */ + if (target + 1 >= targetEnd) { + --source; /* Back up source pointer! */ + result = targetExhausted; break; + } + ch -= halfBase; + *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START); + *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START); + } + } + *sourceStart = source; + *targetStart = target; + return result; +} + +/* --------------------------------------------------------------------- */ + +ConversionResult ConvertUTF16toUTF32 ( + const UTF16** sourceStart, const UTF16* sourceEnd, + UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) { + ConversionResult result = conversionOK; + const UTF16* source = *sourceStart; + UTF32* target = *targetStart; + UTF32 ch, ch2; + while (source < sourceEnd) { + const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */ + ch = *source++; + /* If we have a surrogate pair, convert to UTF32 first. */ + if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) { + /* If the 16 bits following the high surrogate are in the source buffer... */ + if (source < sourceEnd) { + ch2 = *source; + /* If it's a low surrogate, convert to UTF32. */ + if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) { + ch = ((ch - UNI_SUR_HIGH_START) << halfShift) + + (ch2 - UNI_SUR_LOW_START) + halfBase; + ++source; + } else if (flags == strictConversion) { /* it's an unpaired high surrogate */ + --source; /* return to the illegal value itself */ + result = sourceIllegal; + break; + } + } else { /* We don't have the 16 bits following the high surrogate. */ + --source; /* return to the high surrogate */ + result = sourceExhausted; + break; + } + } else if (flags == strictConversion) { + /* UTF-16 surrogate values are illegal in UTF-32 */ + if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) { + --source; /* return to the illegal value itself */ + result = sourceIllegal; + break; + } + } + if (target >= targetEnd) { + source = oldSource; /* Back up source pointer! */ + result = targetExhausted; break; + } + *target++ = ch; + } + *sourceStart = source; + *targetStart = target; +#ifdef CVTUTF_DEBUG +if (result == sourceIllegal) { + fprintf(stderr, "ConvertUTF16toUTF32 illegal seq 0x%04x,%04x\n", ch, ch2); + fflush(stderr); +} +#endif + return result; +} + +/* --------------------------------------------------------------------- */ + +/* + * Index into the table below with the first byte of a UTF-8 sequence to + * get the number of trailing bytes that are supposed to follow it. + * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is + * left as-is for anyone who may want to do such conversion, which was + * allowed in earlier algorithms. + */ +static const char trailingBytesForUTF8[256] = { + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, + 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 +}; + +/* + * Magic values subtracted from a buffer value during UTF8 conversion. + * This table contains as many values as there might be trailing bytes + * in a UTF-8 sequence. + */ +static const UTF32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL, + 0x03C82080UL, 0xFA082080UL, 0x82082080UL }; + +/* + * Once the bits are split out into bytes of UTF-8, this is a mask OR-ed + * into the first byte, depending on how many bytes follow. There are + * as many entries in this table as there are UTF-8 sequence types. + * (I.e., one byte sequence, two byte... etc.). Remember that sequencs + * for *legal* UTF-8 will be 4 or fewer bytes total. + */ +static const UTF8 firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC }; + +/* --------------------------------------------------------------------- */ + +/* The interface converts a whole buffer to avoid function-call overhead. + * Constants have been gathered. Loops & conditionals have been removed as + * much as possible for efficiency, in favor of drop-through switches. + * (See "Note A" at the bottom of the file for equivalent code.) + * If your compiler supports it, the "isLegalUTF8" call can be turned + * into an inline function. + */ + +/* --------------------------------------------------------------------- */ + +ConversionResult ConvertUTF16toUTF8 ( + const UTF16** sourceStart, const UTF16* sourceEnd, + UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) { + ConversionResult result = conversionOK; + const UTF16* source = *sourceStart; + UTF8* target = *targetStart; + while (source < sourceEnd) { + UTF32 ch; + unsigned short bytesToWrite = 0; + const UTF32 byteMask = 0xBF; + const UTF32 byteMark = 0x80; + const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */ + ch = *source++; + /* If we have a surrogate pair, convert to UTF32 first. */ + if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) { + /* If the 16 bits following the high surrogate are in the source buffer... */ + if (source < sourceEnd) { + UTF32 ch2 = *source; + /* If it's a low surrogate, convert to UTF32. */ + if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) { + ch = ((ch - UNI_SUR_HIGH_START) << halfShift) + + (ch2 - UNI_SUR_LOW_START) + halfBase; + ++source; + } else if (flags == strictConversion) { /* it's an unpaired high surrogate */ + --source; /* return to the illegal value itself */ + result = sourceIllegal; + break; + } + } else { /* We don't have the 16 bits following the high surrogate. */ + --source; /* return to the high surrogate */ + result = sourceExhausted; + break; + } + } else if (flags == strictConversion) { + /* UTF-16 surrogate values are illegal in UTF-32 */ + if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) { + --source; /* return to the illegal value itself */ + result = sourceIllegal; + break; + } + } + /* Figure out how many bytes the result will require */ + if (ch < (UTF32)0x80) { bytesToWrite = 1; + } else if (ch < (UTF32)0x800) { bytesToWrite = 2; + } else if (ch < (UTF32)0x10000) { bytesToWrite = 3; + } else if (ch < (UTF32)0x110000) { bytesToWrite = 4; + } else { bytesToWrite = 3; + ch = UNI_REPLACEMENT_CHAR; + } + + target += bytesToWrite; + if (target > targetEnd) { + source = oldSource; /* Back up source pointer! */ + target -= bytesToWrite; result = targetExhausted; break; + } + switch (bytesToWrite) { /* note: everything falls through. */ + case 4: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; + case 3: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; + case 2: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; + case 1: *--target = (UTF8)(ch | firstByteMark[bytesToWrite]); + } + target += bytesToWrite; + } + *sourceStart = source; + *targetStart = target; + return result; +} + +/* --------------------------------------------------------------------- */ + +/* + * Utility routine to tell whether a sequence of bytes is legal UTF-8. + * This must be called with the length pre-determined by the first byte. + * If not calling this from ConvertUTF8to*, then the length can be set by: + * length = trailingBytesForUTF8[*source]+1; + * and the sequence is illegal right away if there aren't that many bytes + * available. + * If presented with a length > 4, this returns false. The Unicode + * definition of UTF-8 goes up to 4-byte sequences. + */ + +static Boolean isLegalUTF8(const UTF8 *source, int length) { + UTF8 a; + const UTF8 *srcptr = source+length; + switch (length) { + default: return false; + /* Everything else falls through when "true"... */ + case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false; + case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false; + case 2: if ((a = (*--srcptr)) > 0xBF) return false; + + switch (*source) { + /* no fall-through in this inner switch */ + case 0xE0: if (a < 0xA0) return false; break; + case 0xED: if (a > 0x9F) return false; break; + case 0xF0: if (a < 0x90) return false; break; + case 0xF4: if (a > 0x8F) return false; break; + default: if (a < 0x80) return false; + } + + case 1: if (*source >= 0x80 && *source < 0xC2) return false; + } + if (*source > 0xF4) return false; + return true; +} + +/* --------------------------------------------------------------------- */ + +/* + * Exported function to return whether a UTF-8 sequence is legal or not. + * This is not used here; it's just exported. + */ +Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd) { + int length = trailingBytesForUTF8[*source]+1; + if (source+length > sourceEnd) { + return false; + } + return isLegalUTF8(source, length); +} + +/* --------------------------------------------------------------------- */ + +ConversionResult ConvertUTF8toUTF16 ( + const UTF8** sourceStart, const UTF8* sourceEnd, + UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) { + ConversionResult result = conversionOK; + const UTF8* source = *sourceStart; + UTF16* target = *targetStart; + while (source < sourceEnd) { + UTF32 ch = 0; + unsigned short extraBytesToRead = trailingBytesForUTF8[*source]; + if (source + extraBytesToRead >= sourceEnd) { + result = sourceExhausted; break; + } + /* Do this check whether lenient or strict */ + if (! isLegalUTF8(source, extraBytesToRead+1)) { + result = sourceIllegal; + break; + } + /* + * The cases all fall through. See "Note A" below. + */ + switch (extraBytesToRead) { + case 5: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */ + case 4: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */ + case 3: ch += *source++; ch <<= 6; + case 2: ch += *source++; ch <<= 6; + case 1: ch += *source++; ch <<= 6; + case 0: ch += *source++; + } + ch -= offsetsFromUTF8[extraBytesToRead]; + + if (target >= targetEnd) { + source -= (extraBytesToRead+1); /* Back up source pointer! */ + result = targetExhausted; break; + } + if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */ + /* UTF-16 surrogate values are illegal in UTF-32 */ + if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) { + if (flags == strictConversion) { + source -= (extraBytesToRead+1); /* return to the illegal value itself */ + result = sourceIllegal; + break; + } else { + *target++ = UNI_REPLACEMENT_CHAR; + } + } else { + *target++ = (UTF16)ch; /* normal case */ + } + } else if (ch > UNI_MAX_UTF16) { + if (flags == strictConversion) { + result = sourceIllegal; + source -= (extraBytesToRead+1); /* return to the start */ + break; /* Bail out; shouldn't continue */ + } else { + *target++ = UNI_REPLACEMENT_CHAR; + } + } else { + /* target is a character in range 0xFFFF - 0x10FFFF. */ + if (target + 1 >= targetEnd) { + source -= (extraBytesToRead+1); /* Back up source pointer! */ + result = targetExhausted; break; + } + ch -= halfBase; + *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START); + *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START); + } + } + *sourceStart = source; + *targetStart = target; + return result; +} + +/* --------------------------------------------------------------------- */ + +ConversionResult ConvertUTF32toUTF8 ( + const UTF32** sourceStart, const UTF32* sourceEnd, + UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) { + ConversionResult result = conversionOK; + const UTF32* source = *sourceStart; + UTF8* target = *targetStart; + while (source < sourceEnd) { + UTF32 ch; + unsigned short bytesToWrite = 0; + const UTF32 byteMask = 0xBF; + const UTF32 byteMark = 0x80; + ch = *source++; + if (flags == strictConversion ) { + /* UTF-16 surrogate values are illegal in UTF-32 */ + if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) { + --source; /* return to the illegal value itself */ + result = sourceIllegal; + break; + } + } + /* + * Figure out how many bytes the result will require. Turn any + * illegally large UTF32 things (> Plane 17) into replacement chars. + */ + if (ch < (UTF32)0x80) { bytesToWrite = 1; + } else if (ch < (UTF32)0x800) { bytesToWrite = 2; + } else if (ch < (UTF32)0x10000) { bytesToWrite = 3; + } else if (ch <= UNI_MAX_LEGAL_UTF32) { bytesToWrite = 4; + } else { bytesToWrite = 3; + ch = UNI_REPLACEMENT_CHAR; + result = sourceIllegal; + } + + target += bytesToWrite; + if (target > targetEnd) { + --source; /* Back up source pointer! */ + target -= bytesToWrite; result = targetExhausted; break; + } + switch (bytesToWrite) { /* note: everything falls through. */ + case 4: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; + case 3: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; + case 2: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; + case 1: *--target = (UTF8) (ch | firstByteMark[bytesToWrite]); + } + target += bytesToWrite; + } + *sourceStart = source; + *targetStart = target; + return result; +} + +/* --------------------------------------------------------------------- */ + +ConversionResult ConvertUTF8toUTF32 ( + const UTF8** sourceStart, const UTF8* sourceEnd, + UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) { + ConversionResult result = conversionOK; + const UTF8* source = *sourceStart; + UTF32* target = *targetStart; + while (source < sourceEnd) { + UTF32 ch = 0; + unsigned short extraBytesToRead = trailingBytesForUTF8[*source]; + if (source + extraBytesToRead >= sourceEnd) { + result = sourceExhausted; break; + } + /* Do this check whether lenient or strict */ + if (! isLegalUTF8(source, extraBytesToRead+1)) { + result = sourceIllegal; + break; + } + /* + * The cases all fall through. See "Note A" below. + */ + switch (extraBytesToRead) { + case 5: ch += *source++; ch <<= 6; + case 4: ch += *source++; ch <<= 6; + case 3: ch += *source++; ch <<= 6; + case 2: ch += *source++; ch <<= 6; + case 1: ch += *source++; ch <<= 6; + case 0: ch += *source++; + } + ch -= offsetsFromUTF8[extraBytesToRead]; + + if (target >= targetEnd) { + source -= (extraBytesToRead+1); /* Back up the source pointer! */ + result = targetExhausted; break; + } + if (ch <= UNI_MAX_LEGAL_UTF32) { + /* + * UTF-16 surrogate values are illegal in UTF-32, and anything + * over Plane 17 (> 0x10FFFF) is illegal. + */ + if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) { + if (flags == strictConversion) { + source -= (extraBytesToRead+1); /* return to the illegal value itself */ + result = sourceIllegal; + break; + } else { + *target++ = UNI_REPLACEMENT_CHAR; + } + } else { + *target++ = ch; + } + } else { /* i.e., ch > UNI_MAX_LEGAL_UTF32 */ + result = sourceIllegal; + *target++ = UNI_REPLACEMENT_CHAR; + } + } + *sourceStart = source; + *targetStart = target; + return result; +} + +} + +/* --------------------------------------------------------------------- + + Note A. + The fall-through switches in UTF-8 reading code save a + temp variable, some decrements & conditionals. The switches + are equivalent to the following loop: + { + int tmpBytesToRead = extraBytesToRead+1; + do { + ch += *source++; + --tmpBytesToRead; + if (tmpBytesToRead) ch <<= 6; + } while (tmpBytesToRead > 0); + } + In UTF-8 writing code, the switches on "bytesToWrite" are + similarly unrolled loops. + + --------------------------------------------------------------------- */ diff --git a/src/linenoise/ConvertUTF.h b/src/linenoise/ConvertUTF.h new file mode 100755 index 000000000000..8a296235dcd9 --- /dev/null +++ b/src/linenoise/ConvertUTF.h @@ -0,0 +1,162 @@ +/* + * Copyright 2001-2004 Unicode, Inc. + * + * Disclaimer + * + * This source code is provided as is by Unicode, Inc. No claims are + * made as to fitness for any particular purpose. No warranties of any + * kind are expressed or implied. The recipient agrees to determine + * applicability of information provided. If this file has been + * purchased on magnetic or optical media from Unicode, Inc., the + * sole remedy for any claim will be exchange of defective media + * within 90 days of receipt. + * + * Limitations on Rights to Redistribute This Code + * + * Unicode, Inc. hereby grants the right to freely use the information + * supplied in this file in the creation of products supporting the + * Unicode Standard, and to make copies of this file in any form + * for internal or external distribution as long as this notice + * remains attached. + */ + +/* --------------------------------------------------------------------- + + Conversions between UTF32, UTF-16, and UTF-8. Header file. + + Several funtions are included here, forming a complete set of + conversions between the three formats. UTF-7 is not included + here, but is handled in a separate source file. + + Each of these routines takes pointers to input buffers and output + buffers. The input buffers are const. + + Each routine converts the text between *sourceStart and sourceEnd, + putting the result into the buffer between *targetStart and + targetEnd. Note: the end pointers are *after* the last item: e.g. + *(sourceEnd - 1) is the last item. + + The return result indicates whether the conversion was successful, + and if not, whether the problem was in the source or target buffers. + (Only the first encountered problem is indicated.) + + After the conversion, *sourceStart and *targetStart are both + updated to point to the end of last text successfully converted in + the respective buffers. + + Input parameters: + sourceStart - pointer to a pointer to the source buffer. + The contents of this are modified on return so that + it points at the next thing to be converted. + targetStart - similarly, pointer to pointer to the target buffer. + sourceEnd, targetEnd - respectively pointers to the ends of the + two buffers, for overflow checking only. + + These conversion functions take a ConversionFlags argument. When this + flag is set to strict, both irregular sequences and isolated surrogates + will cause an error. When the flag is set to lenient, both irregular + sequences and isolated surrogates are converted. + + Whether the flag is strict or lenient, all illegal sequences will cause + an error return. This includes sequences such as: <F4 90 80 80>, <C0 80>, + or <A0> in UTF-8, and values above 0x10FFFF in UTF-32. Conformant code + must check for illegal sequences. + + When the flag is set to lenient, characters over 0x10FFFF are converted + to the replacement character; otherwise (when the flag is set to strict) + they constitute an error. + + Output parameters: + The value "sourceIllegal" is returned from some routines if the input + sequence is malformed. When "sourceIllegal" is returned, the source + value will point to the illegal value that caused the problem. E.g., + in UTF-8 when a sequence is malformed, it points to the start of the + malformed sequence. + + Author: Mark E. Davis, 1994. + Rev History: Rick McGowan, fixes & updates May 2001. + Fixes & updates, Sept 2001. + +------------------------------------------------------------------------ */ + +/* --------------------------------------------------------------------- + The following 4 definitions are compiler-specific. + The C standard does not guarantee that wchar_t has at least + 16 bits, so wchar_t is no less portable than unsigned short! + All should be unsigned values to avoid sign extension during + bit mask & shift operations. +------------------------------------------------------------------------ */ + +#if 0 +typedef unsigned long UTF32; /* at least 32 bits */ +typedef unsigned short UTF16; /* at least 16 bits */ +typedef unsigned char UTF8; /* typically 8 bits */ +#endif + +#include <stdint.h> +#include <string> + +namespace linenoise_ng { + +typedef uint32_t UTF32; +typedef uint16_t UTF16; +typedef uint8_t UTF8; +typedef unsigned char Boolean; /* 0 or 1 */ + +/* Some fundamental constants */ +#define UNI_REPLACEMENT_CHAR (UTF32)0x0000FFFD +#define UNI_MAX_BMP (UTF32)0x0000FFFF +#define UNI_MAX_UTF16 (UTF32)0x0010FFFF +#define UNI_MAX_UTF32 (UTF32)0x7FFFFFFF +#define UNI_MAX_LEGAL_UTF32 (UTF32)0x0010FFFF + +typedef enum { + conversionOK, /* conversion successful */ + sourceExhausted, /* partial character in source, but hit end */ + targetExhausted, /* insuff. room in target for conversion */ + sourceIllegal /* source sequence is illegal/malformed */ +} ConversionResult; + +typedef enum { + strictConversion = 0, + lenientConversion +} ConversionFlags; + +// /* This is for C++ and does no harm in C */ +// #ifdef __cplusplus +// extern "C" { +// #endif + +ConversionResult ConvertUTF8toUTF16 ( + const UTF8** sourceStart, const UTF8* sourceEnd, + UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags); + +ConversionResult ConvertUTF16toUTF8 ( + const UTF16** sourceStart, const UTF16* sourceEnd, + UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags); + +ConversionResult ConvertUTF8toUTF32 ( + const UTF8** sourceStart, const UTF8* sourceEnd, + UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags); + +ConversionResult ConvertUTF32toUTF8 ( + const UTF32** sourceStart, const UTF32* sourceEnd, + UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags); + +ConversionResult ConvertUTF16toUTF32 ( + const UTF16** sourceStart, const UTF16* sourceEnd, + UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags); + +ConversionResult ConvertUTF32toUTF16 ( + const UTF32** sourceStart, const UTF32* sourceEnd, + char16_t** targetStart, char16_t* targetEnd, ConversionFlags flags); + +Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd); + +// #ifdef __cplusplus +// } +// #endif + +} + +/* --------------------------------------------------------------------- */ diff --git a/src/linenoise/LICENSE b/src/linenoise/LICENSE index 18e814865a54..b7c58c445860 100644 --- a/src/linenoise/LICENSE +++ b/src/linenoise/LICENSE @@ -1,25 +1,66 @@ -Copyright (c) 2010-2014, Salvatore Sanfilippo <antirez at gmail dot com> -Copyright (c) 2010-2013, Pieter Noordhuis <pcnoordhuis at gmail dot com> +linenoise.cpp +============= + +Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com> +Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com> All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: -* Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - -* Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND -ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED -WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR -ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES -(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON -ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + * Neither the name of Redis nor the names of its contributors may be used + to endorse or promote products derived from this software without + specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. + + +wcwidth.cpp +=========== + +Markus Kuhn -- 2007-05-26 (Unicode 5.0) + +Permission to use, copy, modify, and distribute this software +for any purpose and without fee is hereby granted. The author +disclaims all warranties with regard to this software. + + + +ConvertUTF.cpp +============== + +Copyright 2001-2004 Unicode, Inc. + +Disclaimer + +This source code is provided as is by Unicode, Inc. No claims are +made as to fitness for any particular purpose. No warranties of any +kind are expressed or implied. The recipient agrees to determine +applicability of information provided. If this file has been +purchased on magnetic or optical media from Unicode, Inc., the +sole remedy for any claim will be exchange of defective media +within 90 days of receipt. + +Limitations on Rights to Redistribute This Code + +Unicode, Inc. hereby grants the right to freely use the information +supplied in this file in the creation of products supporting the +Unicode Standard, and to make copies of this file in any form +for internal or external distribution as long as this notice +remains attached. diff --git a/src/linenoise/linenoise.c b/src/linenoise/linenoise.c deleted file mode 100644 index fce14a7c53a3..000000000000 --- a/src/linenoise/linenoise.c +++ /dev/null @@ -1,1199 +0,0 @@ -/* linenoise.c -- guerrilla line editing library against the idea that a - * line editing lib needs to be 20,000 lines of C code. - * - * You can find the latest source code at: - * - * http://github.com/antirez/linenoise - * - * Does a number of crazy assumptions that happen to be true in 99.9999% of - * the 2010 UNIX computers around. - * - * ------------------------------------------------------------------------ - * - * Copyright (c) 2010-2016, Salvatore Sanfilippo <antirez at gmail dot com> - * Copyright (c) 2010-2013, Pieter Noordhuis <pcnoordhuis at gmail dot com> - * - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * ------------------------------------------------------------------------ - * - * References: - * - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html - * - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html - * - * Todo list: - * - Filter bogus Ctrl+<char> combinations. - * - Win32 support - * - * Bloat: - * - History search like Ctrl+r in readline? - * - * List of escape sequences used by this program, we do everything just - * with three sequences. In order to be so cheap we may have some - * flickering effect with some slow terminal, but the lesser sequences - * the more compatible. - * - * EL (Erase Line) - * Sequence: ESC [ n K - * Effect: if n is 0 or missing, clear from cursor to end of line - * Effect: if n is 1, clear from beginning of line to cursor - * Effect: if n is 2, clear entire line - * - * CUF (CUrsor Forward) - * Sequence: ESC [ n C - * Effect: moves cursor forward n chars - * - * CUB (CUrsor Backward) - * Sequence: ESC [ n D - * Effect: moves cursor backward n chars - * - * The following is used to get the terminal width if getting - * the width with the TIOCGWINSZ ioctl fails - * - * DSR (Device Status Report) - * Sequence: ESC [ 6 n - * Effect: reports the current cusor position as ESC [ n ; m R - * where n is the row and m is the column - * - * When multi line mode is enabled, we also use an additional escape - * sequence. However multi line editing is disabled by default. - * - * CUU (Cursor Up) - * Sequence: ESC [ n A - * Effect: moves cursor up of n chars. - * - * CUD (Cursor Down) - * Sequence: ESC [ n B - * Effect: moves cursor down of n chars. - * - * When linenoiseClearScreen() is called, two additional escape sequences - * are used in order to clear the screen and position the cursor at home - * position. - * - * CUP (Cursor position) - * Sequence: ESC [ H - * Effect: moves the cursor to upper left corner - * - * ED (Erase display) - * Sequence: ESC [ 2 J - * Effect: clear the whole screen - * - */ - -#include <termios.h> -#include <unistd.h> -#include <stdlib.h> -#include <stdio.h> -#include <errno.h> -#include <string.h> -#include <stdlib.h> -#include <ctype.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <sys/ioctl.h> -#include <unistd.h> -#include "linenoise.h" - -#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100 -#define LINENOISE_MAX_LINE 4096 -static char *unsupported_term[] = {"dumb","cons25","emacs",NULL}; -static linenoiseCompletionCallback *completionCallback = NULL; -static linenoiseHintsCallback *hintsCallback = NULL; -static linenoiseFreeHintsCallback *freeHintsCallback = NULL; - -static struct termios orig_termios; /* In order to restore at exit.*/ -static int rawmode = 0; /* For atexit() function to check if restore is needed*/ -static int mlmode = 0; /* Multi line mode. Default is single line. */ -static int atexit_registered = 0; /* Register atexit just 1 time. */ -static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN; -static int history_len = 0; -static char **history = NULL; - -/* The linenoiseState structure represents the state during line editing. - * We pass this state to functions implementing specific editing - * functionalities. */ -struct linenoiseState { - int ifd; /* Terminal stdin file descriptor. */ - int ofd; /* Terminal stdout file descriptor. */ - char *buf; /* Edited line buffer. */ - size_t buflen; /* Edited line buffer size. */ - const char *prompt; /* Prompt to display. */ - size_t plen; /* Prompt length. */ - size_t pos; /* Current cursor position. */ - size_t oldpos; /* Previous refresh cursor position. */ - size_t len; /* Current edited line length. */ - size_t cols; /* Number of columns in terminal. */ - size_t maxrows; /* Maximum num of rows used so far (multiline mode) */ - int history_index; /* The history index we are currently editing. */ -}; - -enum KEY_ACTION{ - KEY_NULL = 0, /* NULL */ - CTRL_A = 1, /* Ctrl+a */ - CTRL_B = 2, /* Ctrl-b */ - CTRL_C = 3, /* Ctrl-c */ - CTRL_D = 4, /* Ctrl-d */ - CTRL_E = 5, /* Ctrl-e */ - CTRL_F = 6, /* Ctrl-f */ - CTRL_H = 8, /* Ctrl-h */ - TAB = 9, /* Tab */ - CTRL_K = 11, /* Ctrl+k */ - CTRL_L = 12, /* Ctrl+l */ - ENTER = 13, /* Enter */ - CTRL_N = 14, /* Ctrl-n */ - CTRL_P = 16, /* Ctrl-p */ - CTRL_T = 20, /* Ctrl-t */ - CTRL_U = 21, /* Ctrl+u */ - CTRL_W = 23, /* Ctrl+w */ - ESC = 27, /* Escape */ - BACKSPACE = 127 /* Backspace */ -}; - -static void linenoiseAtExit(void); -int linenoiseHistoryAdd(const char *line); -static void refreshLine(struct linenoiseState *l); - -/* Debugging macro. */ -#if 0 -FILE *lndebug_fp = NULL; -#define lndebug(...) \ - do { \ - if (lndebug_fp == NULL) { \ - lndebug_fp = fopen("/tmp/lndebug.txt","a"); \ - fprintf(lndebug_fp, \ - "[%d %d %d] p: %d, rows: %d, rpos: %d, max: %d, oldmax: %d\n", \ - (int)l->len,(int)l->pos,(int)l->oldpos,plen,rows,rpos, \ - (int)l->maxrows,old_rows); \ - } \ - fprintf(lndebug_fp, ", " __VA_ARGS__); \ - fflush(lndebug_fp); \ - } while (0) -#else -#define lndebug(fmt, ...) -#endif - -/* ======================= Low level terminal handling ====================== */ - -/* Set if to use or not the multi line mode. */ -void linenoiseSetMultiLine(int ml) { - mlmode = ml; -} - -/* Return true if the terminal name is in the list of terminals we know are - * not able to understand basic escape sequences. */ -static int isUnsupportedTerm(void) { - char *term = getenv("TERM"); - int j; - - if (term == NULL) return 0; - for (j = 0; unsupported_term[j]; j++) - if (!strcasecmp(term,unsupported_term[j])) return 1; - return 0; -} - -/* Raw mode: 1960 magic shit. */ -static int enableRawMode(int fd) { - struct termios raw; - - if (!isatty(STDIN_FILENO)) goto fatal; - if (!atexit_registered) { - atexit(linenoiseAtExit); - atexit_registered = 1; - } - if (tcgetattr(fd,&orig_termios) == -1) goto fatal; - - raw = orig_termios; /* modify the original mode */ - /* input modes: no break, no CR to NL, no parity check, no strip char, - * no start/stop output control. */ - raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON); - /* output modes - disable post processing */ - raw.c_oflag &= ~(OPOST); - /* control modes - set 8 bit chars */ - raw.c_cflag |= (CS8); - /* local modes - choing off, canonical off, no extended functions, - * no signal chars (^Z,^C) */ - raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG); - /* control chars - set return condition: min number of bytes and timer. - * We want read to return every single byte, without timeout. */ - raw.c_cc[VMIN] = 1; raw.c_cc[VTIME] = 0; /* 1 byte, no timer */ - - /* put terminal in raw mode after flushing */ - if (tcsetattr(fd,TCSAFLUSH,&raw) < 0) goto fatal; - rawmode = 1; - return 0; - -fatal: - errno = ENOTTY; - return -1; -} - -static void disableRawMode(int fd) { - /* Don't even check the return value as it's too late. */ - if (rawmode && tcsetattr(fd,TCSAFLUSH,&orig_termios) != -1) - rawmode = 0; -} - -/* Use the ESC [6n escape sequence to query the horizontal cursor position - * and return it. On error -1 is returned, on success the position of the - * cursor. */ -static int getCursorPosition(int ifd, int ofd) { - char buf[32]; - int cols, rows; - unsigned int i = 0; - - /* Report cursor location */ - if (write(ofd, "\x1b[6n", 4) != 4) return -1; - - /* Read the response: ESC [ rows ; cols R */ - while (i < sizeof(buf)-1) { - if (read(ifd,buf+i,1) != 1) break; - if (buf[i] == 'R') break; - i++; - } - buf[i] = '\0'; - - /* Parse it. */ - if (buf[0] != ESC || buf[1] != '[') return -1; - if (sscanf(buf+2,"%d;%d",&rows,&cols) != 2) return -1; - return cols; -} - -/* Try to get the number of columns in the current terminal, or assume 80 - * if it fails. */ -static int getColumns(int ifd, int ofd) { - struct winsize ws; - - if (ioctl(1, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) { - /* ioctl() failed. Try to query the terminal itself. */ - int start, cols; - - /* Get the initial position so we can restore it later. */ - start = getCursorPosition(ifd,ofd); - if (start == -1) goto failed; - - /* Go to right margin and get position. */ - if (write(ofd,"\x1b[999C",6) != 6) goto failed; - cols = getCursorPosition(ifd,ofd); - if (cols == -1) goto failed; - - /* Restore position. */ - if (cols > start) { - char seq[32]; - snprintf(seq,32,"\x1b[%dD",cols-start); - if (write(ofd,seq,strlen(seq)) == -1) { - /* Can't recover... */ - } - } - return cols; - } else { - return ws.ws_col; - } - -failed: - return 80; -} - -/* Clear the screen. Used to handle ctrl+l */ -void linenoiseClearScreen(void) { - if (write(STDOUT_FILENO,"\x1b[H\x1b[2J",7) <= 0) { - /* nothing to do, just to avoid warning. */ - } -} - -/* Beep, used for completion when there is nothing to complete or when all - * the choices were already shown. */ -static void linenoiseBeep(void) { - fprintf(stderr, "\x7"); - fflush(stderr); -} - -/* ============================== Completion ================================ */ - -/* Free a list of completion option populated by linenoiseAddCompletion(). */ -static void freeCompletions(linenoiseCompletions *lc) { - size_t i; - for (i = 0; i < lc->len; i++) - free(lc->cvec[i]); - if (lc->cvec != NULL) - free(lc->cvec); -} - -/* This is an helper function for linenoiseEdit() and is called when the - * user types the <tab> key in order to complete the string currently in the - * input. - * - * The state of the editing is encapsulated into the pointed linenoiseState - * structure as described in the structure definition. */ -static int completeLine(struct linenoiseState *ls) { - linenoiseCompletions lc = { 0, NULL }; - int nread, nwritten; - char c = 0; - - completionCallback(ls->buf,&lc); - if (lc.len == 0) { - linenoiseBeep(); - } else { - size_t stop = 0, i = 0; - - while(!stop) { - /* Show completion or original buffer */ - if (i < lc.len) { - struct linenoiseState saved = *ls; - - ls->len = ls->pos = strlen(lc.cvec[i]); - ls->buf = lc.cvec[i]; - refreshLine(ls); - ls->len = saved.len; - ls->pos = saved.pos; - ls->buf = saved.buf; - } else { - refreshLine(ls); - } - - nread = read(ls->ifd,&c,1); - if (nread <= 0) { - freeCompletions(&lc); - return -1; - } - - switch(c) { - case 9: /* tab */ - i = (i+1) % (lc.len+1); - if (i == lc.len) linenoiseBeep(); - break; - case 27: /* escape */ - /* Re-show original buffer */ - if (i < lc.len) refreshLine(ls); - stop = 1; - break; - default: - /* Update buffer and return */ - if (i < lc.len) { - nwritten = snprintf(ls->buf,ls->buflen,"%s",lc.cvec[i]); - ls->len = ls->pos = nwritten; - } - stop = 1; - break; - } - } - } - - freeCompletions(&lc); - return c; /* Return last read character */ -} - -/* Register a callback function to be called for tab-completion. */ -void linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn) { - completionCallback = fn; -} - -/* Register a hits function to be called to show hits to the user at the - * right of the prompt. */ -void linenoiseSetHintsCallback(linenoiseHintsCallback *fn) { - hintsCallback = fn; -} - -/* Register a function to free the hints returned by the hints callback - * registered with linenoiseSetHintsCallback(). */ -void linenoiseSetFreeHintsCallback(linenoiseFreeHintsCallback *fn) { - freeHintsCallback = fn; -} - -/* This function is used by the callback function registered by the user - * in order to add completion options given the input string when the - * user typed <tab>. See the example.c source code for a very easy to - * understand example. */ -void linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) { - size_t len = strlen(str); - char *copy, **cvec; - - copy = malloc(len+1); - if (copy == NULL) return; - memcpy(copy,str,len+1); - cvec = realloc(lc->cvec,sizeof(char*)*(lc->len+1)); - if (cvec == NULL) { - free(copy); - return; - } - lc->cvec = cvec; - lc->cvec[lc->len++] = copy; -} - -/* =========================== Line editing ================================= */ - -/* We define a very simple "append buffer" structure, that is an heap - * allocated string where we can append to. This is useful in order to - * write all the escape sequences in a buffer and flush them to the standard - * output in a single call, to avoid flickering effects. */ -struct abuf { - char *b; - int len; -}; - -static void abInit(struct abuf *ab) { - ab->b = NULL; - ab->len = 0; -} - -static void abAppend(struct abuf *ab, const char *s, int len) { - char *new = realloc(ab->b,ab->len+len); - - if (new == NULL) return; - memcpy(new+ab->len,s,len); - ab->b = new; - ab->len += len; -} - -static void abFree(struct abuf *ab) { - free(ab->b); -} - -/* Helper of refreshSingleLine() and refreshMultiLine() to show hints - * to the right of the prompt. */ -void refreshShowHints(struct abuf *ab, struct linenoiseState *l, int plen) { - char seq[64]; - if (hintsCallback && plen+l->len < l->cols) { - int color = -1, bold = 0; - char *hint = hintsCallback(l->buf,&color,&bold); - if (hint) { - int hintlen = strlen(hint); - int hintmaxlen = l->cols-(plen+l->len); - if (hintlen > hintmaxlen) hintlen = hintmaxlen; - if (bold == 1 && color == -1) color = 37; - if (color != -1 || bold != 0) - snprintf(seq,64,"\033[%d;%d;49m",bold,color); - abAppend(ab,seq,strlen(seq)); - abAppend(ab,hint,hintlen); - if (color != -1 || bold != 0) - abAppend(ab,"\033[0m",4); - /* Call the function to free the hint returned. */ - if (freeHintsCallback) freeHintsCallback(hint); - } - } -} - -/* Single line low level line refresh. - * - * Rewrite the currently edited line accordingly to the buffer content, - * cursor position, and number of columns of the terminal. */ -static void refreshSingleLine(struct linenoiseState *l) { - char seq[64]; - size_t plen = strlen(l->prompt); - int fd = l->ofd; - char *buf = l->buf; - size_t len = l->len; - size_t pos = l->pos; - struct abuf ab; - - while((plen+pos) >= l->cols) { - buf++; - len--; - pos--; - } - while (plen+len > l->cols) { - len--; - } - - abInit(&ab); - /* Cursor to left edge */ - snprintf(seq,64,"\r"); - abAppend(&ab,seq,strlen(seq)); - /* Write the prompt and the current buffer content */ - abAppend(&ab,l->prompt,strlen(l->prompt)); - abAppend(&ab,buf,len); - /* Show hits if any. */ - refreshShowHints(&ab,l,plen); - /* Erase to right */ - snprintf(seq,64,"\x1b[0K"); - abAppend(&ab,seq,strlen(seq)); - /* Move cursor to original position. */ - snprintf(seq,64,"\r\x1b[%dC", (int)(pos+plen)); - abAppend(&ab,seq,strlen(seq)); - if (write(fd,ab.b,ab.len) == -1) {} /* Can't recover from write error. */ - abFree(&ab); -} - -/* Multi line low level line refresh. - * - * Rewrite the currently edited line accordingly to the buffer content, - * cursor position, and number of columns of the terminal. */ -static void refreshMultiLine(struct linenoiseState *l) { - char seq[64]; - int plen = strlen(l->prompt); - int rows = (plen+l->len+l->cols-1)/l->cols; /* rows used by current buf. */ - int rpos = (plen+l->oldpos+l->cols)/l->cols; /* cursor relative row. */ - int rpos2; /* rpos after refresh. */ - int col; /* colum position, zero-based. */ - int old_rows = l->maxrows; - int fd = l->ofd, j; - struct abuf ab; - - /* Update maxrows if needed. */ - if (rows > (int)l->maxrows) l->maxrows = rows; - - /* First step: clear all the lines used before. To do so start by - * going to the last row. */ - abInit(&ab); - if (old_rows-rpos > 0) { - lndebug("go down %d", old_rows-rpos); - snprintf(seq,64,"\x1b[%dB", old_rows-rpos); - abAppend(&ab,seq,strlen(seq)); - } - - /* Now for every row clear it, go up. */ - for (j = 0; j < old_rows-1; j++) { - lndebug("clear+up"); - snprintf(seq,64,"\r\x1b[0K\x1b[1A"); - abAppend(&ab,seq,strlen(seq)); - } - - /* Clean the top line. */ - lndebug("clear"); - snprintf(seq,64,"\r\x1b[0K"); - abAppend(&ab,seq,strlen(seq)); - - /* Write the prompt and the current buffer content */ - abAppend(&ab,l->prompt,strlen(l->prompt)); - abAppend(&ab,l->buf,l->len); - - /* Show hits if any. */ - refreshShowHints(&ab,l,plen); - - /* If we are at the very end of the screen with our prompt, we need to - * emit a newline and move the prompt to the first column. */ - if (l->pos && - l->pos == l->len && - (l->pos+plen) % l->cols == 0) - { - lndebug("<newline>"); - abAppend(&ab,"\n",1); - snprintf(seq,64,"\r"); - abAppend(&ab,seq,strlen(seq)); - rows++; - if (rows > (int)l->maxrows) l->maxrows = rows; - } - - /* Move cursor to right position. */ - rpos2 = (plen+l->pos+l->cols)/l->cols; /* current cursor relative row. */ - lndebug("rpos2 %d", rpos2); - - /* Go up till we reach the expected positon. */ - if (rows-rpos2 > 0) { - lndebug("go-up %d", rows-rpos2); - snprintf(seq,64,"\x1b[%dA", rows-rpos2); - abAppend(&ab,seq,strlen(seq)); - } - - /* Set column. */ - col = (plen+(int)l->pos) % (int)l->cols; - lndebug("set col %d", 1+col); - if (col) - snprintf(seq,64,"\r\x1b[%dC", col); - else - snprintf(seq,64,"\r"); - abAppend(&ab,seq,strlen(seq)); - - lndebug("\n"); - l->oldpos = l->pos; - - if (write(fd,ab.b,ab.len) == -1) {} /* Can't recover from write error. */ - abFree(&ab); -} - -/* Calls the two low level functions refreshSingleLine() or - * refreshMultiLine() according to the selected mode. */ -static void refreshLine(struct linenoiseState *l) { - if (mlmode) - refreshMultiLine(l); - else - refreshSingleLine(l); -} - -/* Insert the character 'c' at cursor current position. - * - * On error writing to the terminal -1 is returned, otherwise 0. */ -int linenoiseEditInsert(struct linenoiseState *l, char c) { - if (l->len < l->buflen) { - if (l->len == l->pos) { - l->buf[l->pos] = c; - l->pos++; - l->len++; - l->buf[l->len] = '\0'; - if ((!mlmode && l->plen+l->len < l->cols && !hintsCallback)) { - /* Avoid a full update of the line in the - * trivial case. */ - if (write(l->ofd,&c,1) == -1) return -1; - } else { - refreshLine(l); - } - } else { - memmove(l->buf+l->pos+1,l->buf+l->pos,l->len-l->pos); - l->buf[l->pos] = c; - l->len++; - l->pos++; - l->buf[l->len] = '\0'; - refreshLine(l); - } - } - return 0; -} - -/* Move cursor on the left. */ -void linenoiseEditMoveLeft(struct linenoiseState *l) { - if (l->pos > 0) { - l->pos--; - refreshLine(l); - } -} - -/* Move cursor on the right. */ -void linenoiseEditMoveRight(struct linenoiseState *l) { - if (l->pos != l->len) { - l->pos++; - refreshLine(l); - } -} - -/* Move cursor to the start of the line. */ -void linenoiseEditMoveHome(struct linenoiseState *l) { - if (l->pos != 0) { - l->pos = 0; - refreshLine(l); - } -} - -/* Move cursor to the end of the line. */ -void linenoiseEditMoveEnd(struct linenoiseState *l) { - if (l->pos != l->len) { - l->pos = l->len; - refreshLine(l); - } -} - -/* Substitute the currently edited line with the next or previous history - * entry as specified by 'dir'. */ -#define LINENOISE_HISTORY_NEXT 0 -#define LINENOISE_HISTORY_PREV 1 -void linenoiseEditHistoryNext(struct linenoiseState *l, int dir) { - if (history_len > 1) { - /* Update the current history entry before to - * overwrite it with the next one. */ - free(history[history_len - 1 - l->history_index]); - history[history_len - 1 - l->history_index] = strdup(l->buf); - /* Show the new entry */ - l->history_index += (dir == LINENOISE_HISTORY_PREV) ? 1 : -1; - if (l->history_index < 0) { - l->history_index = 0; - return; - } else if (l->history_index >= history_len) { - l->history_index = history_len-1; - return; - } - strncpy(l->buf,history[history_len - 1 - l->history_index],l->buflen); - l->buf[l->buflen-1] = '\0'; - l->len = l->pos = strlen(l->buf); - refreshLine(l); - } -} - -/* Delete the character at the right of the cursor without altering the cursor - * position. Basically this is what happens with the "Delete" keyboard key. */ -void linenoiseEditDelete(struct linenoiseState *l) { - if (l->len > 0 && l->pos < l->len) { - memmove(l->buf+l->pos,l->buf+l->pos+1,l->len-l->pos-1); - l->len--; - l->buf[l->len] = '\0'; - refreshLine(l); - } -} - -/* Backspace implementation. */ -void linenoiseEditBackspace(struct linenoiseState *l) { - if (l->pos > 0 && l->len > 0) { - memmove(l->buf+l->pos-1,l->buf+l->pos,l->len-l->pos); - l->pos--; - l->len--; - l->buf[l->len] = '\0'; - refreshLine(l); - } -} - -/* Delete the previosu word, maintaining the cursor at the start of the - * current word. */ -void linenoiseEditDeletePrevWord(struct linenoiseState *l) { - size_t old_pos = l->pos; - size_t diff; - - while (l->pos > 0 && l->buf[l->pos-1] == ' ') - l->pos--; - while (l->pos > 0 && l->buf[l->pos-1] != ' ') - l->pos--; - diff = old_pos - l->pos; - memmove(l->buf+l->pos,l->buf+old_pos,l->len-old_pos+1); - l->len -= diff; - refreshLine(l); -} - -/* This function is the core of the line editing capability of linenoise. - * It expects 'fd' to be already in "raw mode" so that every key pressed - * will be returned ASAP to read(). - * - * The resulting string is put into 'buf' when the user type enter, or - * when ctrl+d is typed. - * - * The function returns the length of the current buffer. */ -static int linenoiseEdit(int stdin_fd, int stdout_fd, char *buf, size_t buflen, const char *prompt) -{ - struct linenoiseState l; - - /* Populate the linenoise state that we pass to functions implementing - * specific editing functionalities. */ - l.ifd = stdin_fd; - l.ofd = stdout_fd; - l.buf = buf; - l.buflen = buflen; - l.prompt = prompt; - l.plen = strlen(prompt); - l.oldpos = l.pos = 0; - l.len = 0; - l.cols = getColumns(stdin_fd, stdout_fd); - l.maxrows = 0; - l.history_index = 0; - - /* Buffer starts empty. */ - l.buf[0] = '\0'; - l.buflen--; /* Make sure there is always space for the nulterm */ - - /* The latest history entry is always our current buffer, that - * initially is just an empty string. */ - linenoiseHistoryAdd(""); - - if (write(l.ofd,prompt,l.plen) == -1) return -1; - while(1) { - char c; - int nread; - char seq[3]; - - nread = read(l.ifd,&c,1); - if (nread <= 0) return l.len; - - /* Only autocomplete when the callback is set. It returns < 0 when - * there was an error reading from fd. Otherwise it will return the - * character that should be handled next. */ - if (c == 9 && completionCallback != NULL) { - c = completeLine(&l); - /* Return on errors */ - if (c < 0) return l.len; - /* Read next character when 0 */ - if (c == 0) continue; - } - - switch(c) { - case ENTER: /* enter */ - history_len--; - free(history[history_len]); - if (mlmode) linenoiseEditMoveEnd(&l); - if (hintsCallback) { - /* Force a refresh without hints to leave the previous - * line as the user typed it after a newline. */ - linenoiseHintsCallback *hc = hintsCallback; - hintsCallback = NULL; - refreshLine(&l); - hintsCallback = hc; - } - return (int)l.len; - case CTRL_C: /* ctrl-c */ - errno = EAGAIN; - return -1; - case BACKSPACE: /* backspace */ - case 8: /* ctrl-h */ - linenoiseEditBackspace(&l); - break; - case CTRL_D: /* ctrl-d, remove char at right of cursor, or if the - line is empty, act as end-of-file. */ - if (l.len > 0) { - linenoiseEditDelete(&l); - } else { - history_len--; - free(history[history_len]); - return -1; - } - break; - case CTRL_T: /* ctrl-t, swaps current character with previous. */ - if (l.pos > 0 && l.pos < l.len) { - int aux = buf[l.pos-1]; - buf[l.pos-1] = buf[l.pos]; - buf[l.pos] = aux; - if (l.pos != l.len-1) l.pos++; - refreshLine(&l); - } - break; - case CTRL_B: /* ctrl-b */ - linenoiseEditMoveLeft(&l); - break; - case CTRL_F: /* ctrl-f */ - linenoiseEditMoveRight(&l); - break; - case CTRL_P: /* ctrl-p */ - linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_PREV); - break; - case CTRL_N: /* ctrl-n */ - linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_NEXT); - break; - case ESC: /* escape sequence */ - /* Read the next two bytes representing the escape sequence. - * Use two calls to handle slow terminals returning the two - * chars at different times. */ - if (read(l.ifd,seq,1) == -1) break; - if (read(l.ifd,seq+1,1) == -1) break; - - /* ESC [ sequences. */ - if (seq[0] == '[') { - if (seq[1] >= '0' && seq[1] <= '9') { - /* Extended escape, read additional byte. */ - if (read(l.ifd,seq+2,1) == -1) break; - if (seq[2] == '~') { - switch(seq[1]) { - case '3': /* Delete key. */ - linenoiseEditDelete(&l); - break; - } - } - } else { - switch(seq[1]) { - case 'A': /* Up */ - linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_PREV); - break; - case 'B': /* Down */ - linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_NEXT); - break; - case 'C': /* Right */ - linenoiseEditMoveRight(&l); - break; - case 'D': /* Left */ - linenoiseEditMoveLeft(&l); - break; - case 'H': /* Home */ - linenoiseEditMoveHome(&l); - break; - case 'F': /* End*/ - linenoiseEditMoveEnd(&l); - break; - } - } - } - - /* ESC O sequences. */ - else if (seq[0] == 'O') { - switch(seq[1]) { - case 'H': /* Home */ - linenoiseEditMoveHome(&l); - break; - case 'F': /* End*/ - linenoiseEditMoveEnd(&l); - break; - } - } - break; - default: - if (linenoiseEditInsert(&l,c)) return -1; - break; - case CTRL_U: /* Ctrl+u, delete the whole line. */ - buf[0] = '\0'; - l.pos = l.len = 0; - refreshLine(&l); - break; - case CTRL_K: /* Ctrl+k, delete from current to end of line. */ - buf[l.pos] = '\0'; - l.len = l.pos; - refreshLine(&l); - break; - case CTRL_A: /* Ctrl+a, go to the start of the line */ - linenoiseEditMoveHome(&l); - break; - case CTRL_E: /* ctrl+e, go to the end of the line */ - linenoiseEditMoveEnd(&l); - break; - case CTRL_L: /* ctrl+l, clear screen */ - linenoiseClearScreen(); - refreshLine(&l); - break; - case CTRL_W: /* ctrl+w, delete previous word */ - linenoiseEditDeletePrevWord(&l); - break; - } - } - return l.len; -} - -/* This special mode is used by linenoise in order to print scan codes - * on screen for debugging / development purposes. It is implemented - * by the linenoise_example program using the --keycodes option. */ -void linenoisePrintKeyCodes(void) { - char quit[4]; - - printf("Linenoise key codes debugging mode.\n" - "Press keys to see scan codes. Type 'quit' at any time to exit.\n"); - if (enableRawMode(STDIN_FILENO) == -1) return; - memset(quit,' ',4); - while(1) { - char c; - int nread; - - nread = read(STDIN_FILENO,&c,1); - if (nread <= 0) continue; - memmove(quit,quit+1,sizeof(quit)-1); /* shift string to left. */ - quit[sizeof(quit)-1] = c; /* Insert current char on the right. */ - if (memcmp(quit,"quit",sizeof(quit)) == 0) break; - - printf("'%c' %02x (%d) (type quit to exit)\n", - isprint(c) ? c : '?', (int)c, (int)c); - printf("\r"); /* Go left edge manually, we are in raw mode. */ - fflush(stdout); - } - disableRawMode(STDIN_FILENO); -} - -/* This function calls the line editing function linenoiseEdit() using - * the STDIN file descriptor set in raw mode. */ -static int linenoiseRaw(char *buf, size_t buflen, const char *prompt) { - int count; - - if (buflen == 0) { - errno = EINVAL; - return -1; - } - - if (enableRawMode(STDIN_FILENO) == -1) return -1; - count = linenoiseEdit(STDIN_FILENO, STDOUT_FILENO, buf, buflen, prompt); - disableRawMode(STDIN_FILENO); - printf("\n"); - return count; -} - -/* This function is called when linenoise() is called with the standard - * input file descriptor not attached to a TTY. So for example when the - * program using linenoise is called in pipe or with a file redirected - * to its standard input. In this case, we want to be able to return the - * line regardless of its length (by default we are limited to 4k). */ -static char *linenoiseNoTTY(void) { - char *line = NULL; - size_t len = 0, maxlen = 0; - - while(1) { - if (len == maxlen) { - if (maxlen == 0) maxlen = 16; - maxlen *= 2; - char *oldval = line; - line = realloc(line,maxlen); - if (line == NULL) { - if (oldval) free(oldval); - return NULL; - } - } - int c = fgetc(stdin); - if (c == EOF || c == '\n') { - if (c == EOF && len == 0) { - free(line); - return NULL; - } else { - line[len] = '\0'; - return line; - } - } else { - line[len] = c; - len++; - } - } -} - -/* The high level function that is the main API of the linenoise library. - * This function checks if the terminal has basic capabilities, just checking - * for a blacklist of stupid terminals, and later either calls the line - * editing function or uses dummy fgets() so that you will be able to type - * something even in the most desperate of the conditions. */ -char *linenoise(const char *prompt) { - char buf[LINENOISE_MAX_LINE]; - int count; - - if (!isatty(STDIN_FILENO)) { - /* Not a tty: read from file / pipe. In this mode we don't want any - * limit to the line size, so we call a function to handle that. */ - return linenoiseNoTTY(); - } else if (isUnsupportedTerm()) { - size_t len; - - printf("%s",prompt); - fflush(stdout); - if (fgets(buf,LINENOISE_MAX_LINE,stdin) == NULL) return NULL; - len = strlen(buf); - while(len && (buf[len-1] == '\n' || buf[len-1] == '\r')) { - len--; - buf[len] = '\0'; - } - return strdup(buf); - } else { - count = linenoiseRaw(buf,LINENOISE_MAX_LINE,prompt); - if (count == -1) return NULL; - return strdup(buf); - } -} - -/* This is just a wrapper the user may want to call in order to make sure - * the linenoise returned buffer is freed with the same allocator it was - * created with. Useful when the main program is using an alternative - * allocator. */ -void linenoiseFree(void *ptr) { - free(ptr); -} - -/* ================================ History ================================= */ - -/* Free the history, but does not reset it. Only used when we have to - * exit() to avoid memory leaks are reported by valgrind & co. */ -static void freeHistory(void) { - if (history) { - int j; - - for (j = 0; j < history_len; j++) - free(history[j]); - free(history); - } -} - -/* At exit we'll try to fix the terminal to the initial conditions. */ -static void linenoiseAtExit(void) { - disableRawMode(STDIN_FILENO); - freeHistory(); -} - -/* This is the API call to add a new entry in the linenoise history. - * It uses a fixed array of char pointers that are shifted (memmoved) - * when the history max length is reached in order to remove the older - * entry and make room for the new one, so it is not exactly suitable for huge - * histories, but will work well for a few hundred of entries. - * - * Using a circular buffer is smarter, but a bit more complex to handle. */ -int linenoiseHistoryAdd(const char *line) { - char *linecopy; - - if (history_max_len == 0) return 0; - - /* Initialization on first call. */ - if (history == NULL) { - history = malloc(sizeof(char*)*history_max_len); - if (history == NULL) return 0; - memset(history,0,(sizeof(char*)*history_max_len)); - } - - /* Don't add duplicated lines. */ - if (history_len && !strcmp(history[history_len-1], line)) return 0; - - /* Add an heap allocated copy of the line in the history. - * If we reached the max length, remove the older line. */ - linecopy = strdup(line); - if (!linecopy) return 0; - if (history_len == history_max_len) { - free(history[0]); - memmove(history,history+1,sizeof(char*)*(history_max_len-1)); - history_len--; - } - history[history_len] = linecopy; - history_len++; - return 1; -} - -/* Set the maximum length for the history. This function can be called even - * if there is already some history, the function will make sure to retain - * just the latest 'len' elements if the new history length value is smaller - * than the amount of items already inside the history. */ -int linenoiseHistorySetMaxLen(int len) { - char **new; - - if (len < 1) return 0; - if (history) { - int tocopy = history_len; - - new = malloc(sizeof(char*)*len); - if (new == NULL) return 0; - - /* If we can't copy everything, free the elements we'll not use. */ - if (len < tocopy) { - int j; - - for (j = 0; j < tocopy-len; j++) free(history[j]); - tocopy = len; - } - memset(new,0,sizeof(char*)*len); - memcpy(new,history+(history_len-tocopy), sizeof(char*)*tocopy); - free(history); - history = new; - } - history_max_len = len; - if (history_len > history_max_len) - history_len = history_max_len; - return 1; -} - -/* Save the history in the specified file. On success 0 is returned - * otherwise -1 is returned. */ -int linenoiseHistorySave(const char *filename) { - mode_t old_umask = umask(S_IXUSR|S_IRWXG|S_IRWXO); - FILE *fp; - int j; - - fp = fopen(filename,"w"); - umask(old_umask); - if (fp == NULL) return -1; - chmod(filename,S_IRUSR|S_IWUSR); - for (j = 0; j < history_len; j++) - fprintf(fp,"%s\n",history[j]); - fclose(fp); - return 0; -} - -/* Load the history from the specified file. If the file does not exist - * zero is returned and no operation is performed. - * - * If the file exists and the operation succeeded 0 is returned, otherwise - * on error -1 is returned. */ -int linenoiseHistoryLoad(const char *filename) { - FILE *fp = fopen(filename,"r"); - char buf[LINENOISE_MAX_LINE]; - - if (fp == NULL) return -1; - - while (fgets(buf,LINENOISE_MAX_LINE,fp) != NULL) { - char *p; - - p = strchr(buf,'\r'); - if (!p) p = strchr(buf,'\n'); - if (p) *p = '\0'; - linenoiseHistoryAdd(buf); - } - fclose(fp); - return 0; -} diff --git a/src/linenoise/linenoise.cpp b/src/linenoise/linenoise.cpp new file mode 100644 index 000000000000..8ee8984d6948 --- /dev/null +++ b/src/linenoise/linenoise.cpp @@ -0,0 +1,3457 @@ +/* linenoise.c -- guerrilla line editing library against the idea that a + * line editing lib needs to be 20,000 lines of C code. + * + * Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com> + * Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Redis nor the names of its contributors may be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * line editing lib needs to be 20,000 lines of C code. + * + * You can find the latest source code at: + * + * http://github.com/antirez/linenoise + * + * Does a number of crazy assumptions that happen to be true in 99.9999% of + * the 2010 UNIX computers around. + * + * References: + * - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html + * - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html + * + * Todo list: + * - Switch to gets() if $TERM is something we can't support. + * - Filter bogus Ctrl+<char> combinations. + * - Win32 support + * + * Bloat: + * - Completion? + * - History search like Ctrl+r in readline? + * + * List of escape sequences used by this program, we do everything just + * with three sequences. In order to be so cheap we may have some + * flickering effect with some slow terminal, but the lesser sequences + * the more compatible. + * + * CHA (Cursor Horizontal Absolute) + * Sequence: ESC [ n G + * Effect: moves cursor to column n (1 based) + * + * EL (Erase Line) + * Sequence: ESC [ n K + * Effect: if n is 0 or missing, clear from cursor to end of line + * Effect: if n is 1, clear from beginning of line to cursor + * Effect: if n is 2, clear entire line + * + * CUF (Cursor Forward) + * Sequence: ESC [ n C + * Effect: moves cursor forward of n chars + * + * The following are used to clear the screen: ESC [ H ESC [ 2 J + * This is actually composed of two sequences: + * + * cursorhome + * Sequence: ESC [ H + * Effect: moves the cursor to upper left corner + * + * ED2 (Clear entire screen) + * Sequence: ESC [ 2 J + * Effect: clear the whole screen + * + */ + +#ifdef _WIN32 + +#include <conio.h> +#include <windows.h> +#include <io.h> + +#if defined(_MSC_VER) && _MSC_VER < 1900 +#define snprintf _snprintf // Microsoft headers use underscores in some names +#endif + +#if !defined GNUC +#define strcasecmp _stricmp +#endif + +#define strdup _strdup +#define isatty _isatty +#define write _write +#define STDIN_FILENO 0 + +#else /* _WIN32 */ + +#include <signal.h> +#include <termios.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <sys/ioctl.h> +#include <cctype> +#include <wctype.h> + +#endif /* _WIN32 */ + +#include <stdio.h> +#include <errno.h> +#include <fcntl.h> + +#include "linenoise.h" +#include "ConvertUTF.h" + +#include <string> +#include <vector> +#include <memory> + +using std::string; +using std::vector; +using std::unique_ptr; +using namespace linenoise_ng; + +typedef unsigned char char8_t; + +static ConversionResult copyString8to32(char32_t* dst, size_t dstSize, + size_t& dstCount, const char* src) { + const UTF8* sourceStart = reinterpret_cast<const UTF8*>(src); + const UTF8* sourceEnd = sourceStart + strlen(src); + UTF32* targetStart = reinterpret_cast<UTF32*>(dst); + UTF32* targetEnd = targetStart + dstSize; + + ConversionResult res = ConvertUTF8toUTF32( + &sourceStart, sourceEnd, &targetStart, targetEnd, lenientConversion); + + if (res == conversionOK) { + dstCount = targetStart - reinterpret_cast<UTF32*>(dst); + + if (dstCount < dstSize) { + *targetStart = 0; + } + } + + return res; +} + +static ConversionResult copyString8to32(char32_t* dst, size_t dstSize, + size_t& dstCount, const char8_t* src) { + return copyString8to32(dst, dstSize, dstCount, + reinterpret_cast<const char*>(src)); +} + +static size_t strlen32(const char32_t* str) { + const char32_t* ptr = str; + + while (*ptr) { + ++ptr; + } + + return ptr - str; +} + +static size_t strlen8(const char8_t* str) { + return strlen(reinterpret_cast<const char*>(str)); +} + +static char8_t* strdup8(const char* src) { + return reinterpret_cast<char8_t*>(strdup(src)); +} + +#ifdef _WIN32 +static const int FOREGROUND_WHITE = + FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE; +static const int BACKGROUND_WHITE = + BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE; +static const int INTENSITY = FOREGROUND_INTENSITY | BACKGROUND_INTENSITY; + +class WinAttributes { + public: + WinAttributes() { + CONSOLE_SCREEN_BUFFER_INFO info; + GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &info); + _defaultAttribute = info.wAttributes & INTENSITY; + _defaultColor = info.wAttributes & FOREGROUND_WHITE; + _defaultBackground = info.wAttributes & BACKGROUND_WHITE; + + _consoleAttribute = _defaultAttribute; + _consoleColor = _defaultColor | _defaultBackground; + } + + public: + int _defaultAttribute; + int _defaultColor; + int _defaultBackground; + + int _consoleAttribute; + int _consoleColor; +}; + +static WinAttributes WIN_ATTR; + +static void copyString32to16(char16_t* dst, size_t dstSize, size_t* dstCount, + const char32_t* src, size_t srcSize) { + const UTF32* sourceStart = reinterpret_cast<const UTF32*>(src); + const UTF32* sourceEnd = sourceStart + srcSize; + char16_t* targetStart = reinterpret_cast<char16_t*>(dst); + char16_t* targetEnd = targetStart + dstSize; + + ConversionResult res = ConvertUTF32toUTF16( + &sourceStart, sourceEnd, &targetStart, targetEnd, lenientConversion); + + if (res == conversionOK) { + *dstCount = targetStart - reinterpret_cast<char16_t*>(dst); + + if (*dstCount < dstSize) { + *targetStart = 0; + } + } +} +#endif + +static void copyString32to8(char* dst, size_t dstSize, size_t* dstCount, + const char32_t* src, size_t srcSize) { + const UTF32* sourceStart = reinterpret_cast<const UTF32*>(src); + const UTF32* sourceEnd = sourceStart + srcSize; + UTF8* targetStart = reinterpret_cast<UTF8*>(dst); + UTF8* targetEnd = targetStart + dstSize; + + ConversionResult res = ConvertUTF32toUTF8( + &sourceStart, sourceEnd, &targetStart, targetEnd, lenientConversion); + + if (res == conversionOK) { + *dstCount = targetStart - reinterpret_cast<UTF8*>(dst); + + if (*dstCount < dstSize) { + *targetStart = 0; + } + } +} + +static void copyString32to8(char* dst, size_t dstLen, const char32_t* src) { + size_t dstCount = 0; + copyString32to8(dst, dstLen, &dstCount, src, strlen32(src)); +} + +static void copyString32(char32_t* dst, const char32_t* src, size_t len) { + while (0 < len && *src) { + *dst++ = *src++; + --len; + } + + *dst = 0; +} + +static int strncmp32(const char32_t* left, const char32_t* right, size_t len) { + while (0 < len && *left) { + if (*left != *right) { + return *left - *right; + } + + ++left; + ++right; + --len; + } + + return 0; +} + +#ifdef _WIN32 +#include <iostream> + +static size_t OutputWin(char16_t* text16, char32_t* text32, size_t len32) { + size_t count16 = 0; + + copyString32to16(text16, len32, &count16, text32, len32); + WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE), text16, + static_cast<DWORD>(count16), nullptr, nullptr); + + return count16; +} + +static char32_t* HandleEsc(char32_t* p, char32_t* end) { + if (*p == '[') { + int code = 0; + + for (++p; p < end; ++p) { + char32_t c = *p; + + if ('0' <= c && c <= '9') { + code = code * 10 + (c - '0'); + } else if (c == 'm' || c == ';') { + switch (code) { + case 0: + WIN_ATTR._consoleAttribute = WIN_ATTR._defaultAttribute; + WIN_ATTR._consoleColor = + WIN_ATTR._defaultColor | WIN_ATTR._defaultBackground; + break; + + case 1: // BOLD + case 5: // BLINK + WIN_ATTR._consoleAttribute = + (WIN_ATTR._defaultAttribute ^ FOREGROUND_INTENSITY) & INTENSITY; + break; + + case 30: + WIN_ATTR._consoleColor = BACKGROUND_WHITE; + break; + + case 31: + WIN_ATTR._consoleColor = + FOREGROUND_RED | WIN_ATTR._defaultBackground; + break; + + case 32: + WIN_ATTR._consoleColor = + FOREGROUND_GREEN | WIN_ATTR._defaultBackground; + break; + + case 33: + WIN_ATTR._consoleColor = + FOREGROUND_RED | FOREGROUND_GREEN | WIN_ATTR._defaultBackground; + break; + + case 34: + WIN_ATTR._consoleColor = + FOREGROUND_BLUE | WIN_ATTR._defaultBackground; + break; + + case 35: + WIN_ATTR._consoleColor = + FOREGROUND_BLUE | FOREGROUND_RED | WIN_ATTR._defaultBackground; + break; + + case 36: + WIN_ATTR._consoleColor = FOREGROUND_BLUE | FOREGROUND_GREEN | + WIN_ATTR._defaultBackground; + break; + + case 37: + WIN_ATTR._consoleColor = FOREGROUND_GREEN | FOREGROUND_RED | + FOREGROUND_BLUE | + WIN_ATTR._defaultBackground; + break; + } + + code = 0; + } + + if (*p == 'm') { + ++p; + break; + } + } + } else { + ++p; + } + + auto handle = GetStdHandle(STD_OUTPUT_HANDLE); + SetConsoleTextAttribute(handle, + WIN_ATTR._consoleAttribute | WIN_ATTR._consoleColor); + + return p; +} + +static size_t WinWrite32(char16_t* text16, char32_t* text32, size_t len32) { + char32_t* p = text32; + char32_t* q = p; + char32_t* e = text32 + len32; + size_t count16 = 0; + + while (p < e) { + if (*p == 27) { + if (q < p) { + count16 += OutputWin(text16, q, p - q); + } + + q = p = HandleEsc(p + 1, e); + } else { + ++p; + } + } + + if (q < p) { + count16 += OutputWin(text16, q, p - q); + } + + return count16; +} +#endif + +static int write32(int fd, char32_t* text32, int len32) { +#ifdef _WIN32 + if (isatty(fd)) { + size_t len16 = 2 * len32 + 1; + unique_ptr<char16_t[]> text16(new char16_t[len16]); + size_t count16 = WinWrite32(text16.get(), text32, len32); + + return static_cast<int>(count16); + } else { + size_t len8 = 4 * len32 + 1; + unique_ptr<char[]> text8(new char[len8]); + size_t count8 = 0; + + copyString32to8(text8.get(), len8, &count8, text32, len32); + + return write(fd, text8.get(), static_cast<unsigned int>(count8)); + } +#else + size_t len8 = 4 * len32 + 1; + unique_ptr<char[]> text8(new char[len8]); + size_t count8 = 0; + + copyString32to8(text8.get(), len8, &count8, text32, len32); + + return write(fd, text8.get(), count8); +#endif +} + +class Utf32String { + public: + Utf32String() : _length(0), _data(nullptr) { + // note: parens intentional, _data must be properly initialized + _data = new char32_t[1](); + } + + explicit Utf32String(const char* src) : _length(0), _data(nullptr) { + size_t len = strlen(src); + // note: parens intentional, _data must be properly initialized + _data = new char32_t[len + 1](); + copyString8to32(_data, len + 1, _length, src); + } + + explicit Utf32String(const char8_t* src) : _length(0), _data(nullptr) { + size_t len = strlen(reinterpret_cast<const char*>(src)); + // note: parens intentional, _data must be properly initialized + _data = new char32_t[len + 1](); + copyString8to32(_data, len + 1, _length, src); + } + + explicit Utf32String(const char32_t* src) : _length(0), _data(nullptr) { + for (_length = 0; src[_length] != 0; ++_length) { + } + + // note: parens intentional, _data must be properly initialized + _data = new char32_t[_length + 1](); + memcpy(_data, src, _length * sizeof(char32_t)); + } + + explicit Utf32String(const char32_t* src, int len) : _length(len), _data(nullptr) { + // note: parens intentional, _data must be properly initialized + _data = new char32_t[len + 1](); + memcpy(_data, src, len * sizeof(char32_t)); + } + + explicit Utf32String(int len) : _length(0), _data(nullptr) { + // note: parens intentional, _data must be properly initialized + _data = new char32_t[len](); + } + + explicit Utf32String(const Utf32String& that) : _length(that._length), _data(nullptr) { + // note: parens intentional, _data must be properly initialized + _data = new char32_t[_length + 1](); + memcpy(_data, that._data, sizeof(char32_t) * _length); + } + + Utf32String& operator=(const Utf32String& that) { + if (this != &that) { + delete[] _data; + _data = new char32_t[that._length](); + _length = that._length; + memcpy(_data, that._data, sizeof(char32_t) * _length); + } + + return *this; + } + + ~Utf32String() { delete[] _data; } + + public: + char32_t* get() const { return _data; } + + size_t length() const { return _length; } + + size_t chars() const { return _length; } + + void initFromBuffer() { + for (_length = 0; _data[_length] != 0; ++_length) { + } + } + + const char32_t& operator[](size_t pos) const { return _data[pos]; } + + char32_t& operator[](size_t pos) { return _data[pos]; } + + private: + size_t _length; + char32_t* _data; +}; + +class Utf8String { + Utf8String(const Utf8String&) = delete; + Utf8String& operator=(const Utf8String&) = delete; + + public: + explicit Utf8String(const Utf32String& src) { + size_t len = src.length() * 4 + 1; + _data = new char[len]; + copyString32to8(_data, len, src.get()); + } + + ~Utf8String() { delete[] _data; } + + public: + char* get() const { return _data; } + + private: + char* _data; +}; + +struct linenoiseCompletions { + vector<Utf32String> completionStrings; +}; + +#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100 +#define LINENOISE_MAX_LINE 4096 + +// make control-characters more readable +#define ctrlChar(upperCaseASCII) (upperCaseASCII - 0x40) + +/** + * Recompute widths of all characters in a char32_t buffer + * @param text input buffer of Unicode characters + * @param widths output buffer of character widths + * @param charCount number of characters in buffer + */ +namespace linenoise_ng { +int mk_wcwidth(char32_t ucs); +} + +static void recomputeCharacterWidths(const char32_t* text, char* widths, + int charCount) { + for (int i = 0; i < charCount; ++i) { + widths[i] = mk_wcwidth(text[i]); + } +} + +/** + * Calculate a new screen position given a starting position, screen width and + * character count + * @param x initial x position (zero-based) + * @param y initial y position (zero-based) + * @param screenColumns screen column count + * @param charCount character positions to advance + * @param xOut returned x position (zero-based) + * @param yOut returned y position (zero-based) + */ +static void calculateScreenPosition(int x, int y, int screenColumns, + int charCount, int& xOut, int& yOut) { + xOut = x; + yOut = y; + int charsRemaining = charCount; + while (charsRemaining > 0) { + int charsThisRow = (x + charsRemaining < screenColumns) ? charsRemaining + : screenColumns - x; + xOut = x + charsThisRow; + yOut = y; + charsRemaining -= charsThisRow; + x = 0; + ++y; + } + if (xOut == screenColumns) { // we have to special-case line wrap + xOut = 0; + ++yOut; + } +} + +/** + * Calculate a column width using mk_wcswidth() + * @param buf32 text to calculate + * @param len length of text to calculate + */ +namespace linenoise_ng { +int mk_wcswidth(const char32_t* pwcs, size_t n); +} + +static int calculateColumnPosition(char32_t* buf32, int len) { + int width = mk_wcswidth(reinterpret_cast<const char32_t*>(buf32), len); + if (width == -1) + return len; + else + return width; +} + +static bool isControlChar(char32_t testChar) { + return (testChar < ' ') || // C0 controls + (testChar >= 0x7F && testChar <= 0x9F); // DEL and C1 controls +} + +struct PromptBase { // a convenience struct for grouping prompt info + Utf32String promptText; // our copy of the prompt text, edited + char* promptCharWidths; // character widths from mk_wcwidth() + int promptChars; // chars in promptText + int promptBytes; // bytes in promptText + int promptExtraLines; // extra lines (beyond 1) occupied by prompt + int promptIndentation; // column offset to end of prompt + int promptLastLinePosition; // index into promptText where last line begins + int promptPreviousInputLen; // promptChars of previous input line, for + // clearing + int promptCursorRowOffset; // where the cursor is relative to the start of + // the prompt + int promptScreenColumns; // width of screen in columns + int promptPreviousLen; // help erasing + int promptErrorCode; // error code (invalid UTF-8) or zero + + PromptBase() : promptPreviousInputLen(0) {} + + bool write() { + if (write32(1, promptText.get(), promptBytes) == -1) return false; + + return true; + } +}; + +struct PromptInfo : public PromptBase { + PromptInfo(const char* textPtr, int columns) { + promptExtraLines = 0; + promptLastLinePosition = 0; + promptPreviousLen = 0; + promptScreenColumns = columns; + Utf32String tempUnicode(textPtr); + + // strip control characters from the prompt -- we do allow newline + char32_t* pIn = tempUnicode.get(); + char32_t* pOut = pIn; + + int len = 0; + int x = 0; + + bool const strip = (isatty(1) == 0); + + while (*pIn) { + char32_t c = *pIn; + if ('\n' == c || !isControlChar(c)) { + *pOut = c; + ++pOut; + ++pIn; + ++len; + if ('\n' == c || ++x >= promptScreenColumns) { + x = 0; + ++promptExtraLines; + promptLastLinePosition = len; + } + } else if (c == '\x1b') { + if (strip) { + // jump over control chars + ++pIn; + if (*pIn == '[') { + ++pIn; + while (*pIn && ((*pIn == ';') || ((*pIn >= '0' && *pIn <= '9')))) { + ++pIn; + } + if (*pIn == 'm') { + ++pIn; + } + } + } else { + // copy control chars + *pOut = *pIn; + ++pOut; + ++pIn; + if (*pIn == '[') { + *pOut = *pIn; + ++pOut; + ++pIn; + while (*pIn && ((*pIn == ';') || ((*pIn >= '0' && *pIn <= '9')))) { + *pOut = *pIn; + ++pOut; + ++pIn; + } + if (*pIn == 'm') { + *pOut = *pIn; + ++pOut; + ++pIn; + } + } + } + } else { + ++pIn; + } + } + *pOut = 0; + promptChars = len; + promptBytes = static_cast<int>(pOut - tempUnicode.get()); + promptText = tempUnicode; + + promptIndentation = len - promptLastLinePosition; + promptCursorRowOffset = promptExtraLines; + } +}; + +// Used with DynamicPrompt (history search) +// +static const Utf32String forwardSearchBasePrompt("(i-search)`"); +static const Utf32String reverseSearchBasePrompt("(reverse-i-search)`"); +static const Utf32String endSearchBasePrompt("': "); +static Utf32String + previousSearchText; // remembered across invocations of linenoise() + +// changing prompt for "(reverse-i-search)`text':" etc. +// +struct DynamicPrompt : public PromptBase { + Utf32String searchText; // text we are searching for + char* searchCharWidths; // character widths from mk_wcwidth() + int searchTextLen; // chars in searchText + int direction; // current search direction, 1=forward, -1=reverse + + DynamicPrompt(PromptBase& pi, int initialDirection) + : searchTextLen(0), direction(initialDirection) { + promptScreenColumns = pi.promptScreenColumns; + promptCursorRowOffset = 0; + Utf32String emptyString(1); + searchText = emptyString; + const Utf32String* basePrompt = + (direction > 0) ? &forwardSearchBasePrompt : &reverseSearchBasePrompt; + size_t promptStartLength = basePrompt->length(); + promptChars = + static_cast<int>(promptStartLength + endSearchBasePrompt.length()); + promptBytes = promptChars; + promptLastLinePosition = promptChars; // TODO fix this, we are asssuming + // that the history prompt won't wrap + // (!) + promptPreviousLen = promptChars; + Utf32String tempUnicode(promptChars + 1); + memcpy(tempUnicode.get(), basePrompt->get(), + sizeof(char32_t) * promptStartLength); + memcpy(&tempUnicode[promptStartLength], endSearchBasePrompt.get(), + sizeof(char32_t) * (endSearchBasePrompt.length() + 1)); + tempUnicode.initFromBuffer(); + promptText = tempUnicode; + calculateScreenPosition(0, 0, pi.promptScreenColumns, promptChars, + promptIndentation, promptExtraLines); + } + + void updateSearchPrompt(void) { + const Utf32String* basePrompt = + (direction > 0) ? &forwardSearchBasePrompt : &reverseSearchBasePrompt; + size_t promptStartLength = basePrompt->length(); + promptChars = static_cast<int>(promptStartLength + searchTextLen + + endSearchBasePrompt.length()); + promptBytes = promptChars; + Utf32String tempUnicode(promptChars + 1); + memcpy(tempUnicode.get(), basePrompt->get(), + sizeof(char32_t) * promptStartLength); + memcpy(&tempUnicode[promptStartLength], searchText.get(), + sizeof(char32_t) * searchTextLen); + size_t endIndex = promptStartLength + searchTextLen; + memcpy(&tempUnicode[endIndex], endSearchBasePrompt.get(), + sizeof(char32_t) * (endSearchBasePrompt.length() + 1)); + tempUnicode.initFromBuffer(); + promptText = tempUnicode; + } + + void updateSearchText(const char32_t* textPtr) { + Utf32String tempUnicode(textPtr); + searchTextLen = static_cast<int>(tempUnicode.chars()); + searchText = tempUnicode; + updateSearchPrompt(); + } +}; + +class KillRing { + static const int capacity = 10; + int size; + int index; + char indexToSlot[10]; + vector<Utf32String> theRing; + + public: + enum action { actionOther, actionKill, actionYank }; + action lastAction; + size_t lastYankSize; + + KillRing() : size(0), index(0), lastAction(actionOther) { + theRing.reserve(capacity); + } + + void kill(const char32_t* text, int textLen, bool forward) { + if (textLen == 0) { + return; + } + Utf32String killedText(text, textLen); + if (lastAction == actionKill && size > 0) { + int slot = indexToSlot[0]; + int currentLen = static_cast<int>(theRing[slot].length()); + int resultLen = currentLen + textLen; + Utf32String temp(resultLen + 1); + if (forward) { + memcpy(temp.get(), theRing[slot].get(), currentLen * sizeof(char32_t)); + memcpy(&temp[currentLen], killedText.get(), textLen * sizeof(char32_t)); + } else { + memcpy(temp.get(), killedText.get(), textLen * sizeof(char32_t)); + memcpy(&temp[textLen], theRing[slot].get(), + currentLen * sizeof(char32_t)); + } + temp[resultLen] = 0; + temp.initFromBuffer(); + theRing[slot] = temp; + } else { + if (size < capacity) { + if (size > 0) { + memmove(&indexToSlot[1], &indexToSlot[0], size); + } + indexToSlot[0] = size; + size++; + theRing.push_back(killedText); + } else { + int slot = indexToSlot[capacity - 1]; + theRing[slot] = killedText; + memmove(&indexToSlot[1], &indexToSlot[0], capacity - 1); + indexToSlot[0] = slot; + } + index = 0; + } + } + + Utf32String* yank() { return (size > 0) ? &theRing[indexToSlot[index]] : 0; } + + Utf32String* yankPop() { + if (size == 0) { + return 0; + } + ++index; + if (index == size) { + index = 0; + } + return &theRing[indexToSlot[index]]; + } +}; + +class InputBuffer { + char32_t* buf32; // input buffer + char* charWidths; // character widths from mk_wcwidth() + int buflen; // buffer size in characters + int len; // length of text in input buffer + int pos; // character position in buffer ( 0 <= pos <= len ) + + void clearScreen(PromptBase& pi); + int incrementalHistorySearch(PromptBase& pi, int startChar); + int completeLine(PromptBase& pi); + void refreshLine(PromptBase& pi); + + public: + InputBuffer(char32_t* buffer, char* widthArray, int bufferLen) + : buf32(buffer), + charWidths(widthArray), + buflen(bufferLen - 1), + len(0), + pos(0) { + buf32[0] = 0; + } + void preloadBuffer(const char* preloadText) { + size_t ucharCount = 0; + copyString8to32(buf32, buflen + 1, ucharCount, preloadText); + recomputeCharacterWidths(buf32, charWidths, static_cast<int>(ucharCount)); + len = static_cast<int>(ucharCount); + pos = static_cast<int>(ucharCount); + } + int getInputLine(PromptBase& pi); + int length(void) const { return len; } +}; + +// Special codes for keyboard input: +// +// Between Windows and the various Linux "terminal" programs, there is some +// pretty diverse behavior in the "scan codes" and escape sequences we are +// presented with. So ... we'll translate them all into our own pidgin +// pseudocode, trying to stay out of the way of UTF-8 and international +// characters. Here's the general plan. +// +// "User input keystrokes" (key chords, whatever) will be encoded as a single +// value. +// The low 21 bits are reserved for Unicode characters. Popular function-type +// keys +// get their own codes in the range 0x10200000 to (if needed) 0x1FE00000, +// currently +// just arrow keys, Home, End and Delete. Keypresses with Ctrl get ORed with +// 0x20000000, with Alt get ORed with 0x40000000. So, Ctrl+Alt+Home is encoded +// as 0x20000000 + 0x40000000 + 0x10A00000 == 0x70A00000. To keep things +// complicated, +// the Alt key is equivalent to prefixing the keystroke with ESC, so ESC +// followed by +// D is treated the same as Alt + D ... we'll just use Emacs terminology and +// call +// this "Meta". So, we will encode both ESC followed by D and Alt held down +// while D +// is pressed the same, as Meta-D, encoded as 0x40000064. +// +// Here are the definitions of our component constants: +// +// Maximum unsigned 32-bit value = 0xFFFFFFFF; // For reference, max 32-bit +// value +// Highest allocated Unicode char = 0x001FFFFF; // For reference, max +// Unicode value +static const int META = 0x40000000; // Meta key combination +static const int CTRL = 0x20000000; // Ctrl key combination +// static const int SPECIAL_KEY = 0x10000000; // Common bit for all special +// keys +static const int UP_ARROW_KEY = 0x10200000; // Special keys +static const int DOWN_ARROW_KEY = 0x10400000; +static const int RIGHT_ARROW_KEY = 0x10600000; +static const int LEFT_ARROW_KEY = 0x10800000; +static const int HOME_KEY = 0x10A00000; +static const int END_KEY = 0x10C00000; +static const int DELETE_KEY = 0x10E00000; +static const int PAGE_UP_KEY = 0x11000000; +static const int PAGE_DOWN_KEY = 0x11200000; + +static const char* unsupported_term[] = {"dumb", "cons25", "emacs", NULL}; +static linenoiseCompletionCallback* completionCallback = NULL; + +#ifdef _WIN32 +static HANDLE console_in, console_out; +static DWORD oldMode; +static WORD oldDisplayAttribute; +#else +static struct termios orig_termios; /* in order to restore at exit */ +#endif + +static KillRing killRing; + +static int rawmode = 0; /* for atexit() function to check if restore is needed*/ +static int atexit_registered = 0; /* register atexit just 1 time */ +static int historyMaxLen = LINENOISE_DEFAULT_HISTORY_MAX_LEN; +static int historyLen = 0; +static int historyIndex = 0; +static char8_t** history = NULL; + +// used to emulate Windows command prompt on down-arrow after a recall +// we use -2 as our "not set" value because we add 1 to the previous index on +// down-arrow, +// and zero is a valid index (so -1 is a valid "previous index") +static int historyPreviousIndex = -2; +static bool historyRecallMostRecent = false; + +static void linenoiseAtExit(void); + +static bool isUnsupportedTerm(void) { + char* term = getenv("TERM"); + if (term == NULL) return false; + for (int j = 0; unsupported_term[j]; ++j) + if (!strcasecmp(term, unsupported_term[j])) { + return true; + } + return false; +} + +static void beep() { + fprintf(stderr, "\x7"); // ctrl-G == bell/beep + fflush(stderr); +} + +void linenoiseHistoryFree(void) { + if (history) { + for (int j = 0; j < historyLen; ++j) free(history[j]); + historyLen = 0; + free(history); + history = 0; + } +} + +static int enableRawMode(void) { +#ifdef _WIN32 + if (!console_in) { + console_in = GetStdHandle(STD_INPUT_HANDLE); + console_out = GetStdHandle(STD_OUTPUT_HANDLE); + + GetConsoleMode(console_in, &oldMode); + SetConsoleMode(console_in, oldMode & + ~(ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT | + ENABLE_PROCESSED_INPUT)); + } + return 0; +#else + struct termios raw; + + if (!isatty(STDIN_FILENO)) goto fatal; + if (!atexit_registered) { + atexit(linenoiseAtExit); + atexit_registered = 1; + } + if (tcgetattr(0, &orig_termios) == -1) goto fatal; + + raw = orig_termios; /* modify the original mode */ + /* input modes: no break, no CR to NL, no parity check, no strip char, + * no start/stop output control. */ + raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON); + /* output modes - disable post processing */ + // this is wrong, we don't want raw output, it turns newlines into straight + // linefeeds + // raw.c_oflag &= ~(OPOST); + /* control modes - set 8 bit chars */ + raw.c_cflag |= (CS8); + /* local modes - echoing off, canonical off, no extended functions, + * no signal chars (^Z,^C) */ + raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG); + /* control chars - set return condition: min number of bytes and timer. + * We want read to return every single byte, without timeout. */ + raw.c_cc[VMIN] = 1; + raw.c_cc[VTIME] = 0; /* 1 byte, no timer */ + + /* put terminal in raw mode after flushing */ + if (tcsetattr(0, TCSADRAIN, &raw) < 0) goto fatal; + rawmode = 1; + return 0; + +fatal: + errno = ENOTTY; + return -1; +#endif +} + +static void disableRawMode(void) { +#ifdef _WIN32 + SetConsoleMode(console_in, oldMode); + console_in = 0; + console_out = 0; +#else + if (rawmode && tcsetattr(0, TCSADRAIN, &orig_termios) != -1) rawmode = 0; +#endif +} + +// At exit we'll try to fix the terminal to the initial conditions +static void linenoiseAtExit(void) { disableRawMode(); } + +static int getScreenColumns(void) { + int cols; +#ifdef _WIN32 + CONSOLE_SCREEN_BUFFER_INFO inf; + GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &inf); + cols = inf.dwSize.X; +#else + struct winsize ws; + cols = (ioctl(1, TIOCGWINSZ, &ws) == -1) ? 80 : ws.ws_col; +#endif + // cols is 0 in certain circumstances like inside debugger, which creates + // further issues + return (cols > 0) ? cols : 80; +} + +static int getScreenRows(void) { + int rows; +#ifdef _WIN32 + CONSOLE_SCREEN_BUFFER_INFO inf; + GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &inf); + rows = 1 + inf.srWindow.Bottom - inf.srWindow.Top; +#else + struct winsize ws; + rows = (ioctl(1, TIOCGWINSZ, &ws) == -1) ? 24 : ws.ws_row; +#endif + return (rows > 0) ? rows : 24; +} + +static void setDisplayAttribute(bool enhancedDisplay, bool error) { +#ifdef _WIN32 + if (enhancedDisplay) { + CONSOLE_SCREEN_BUFFER_INFO inf; + GetConsoleScreenBufferInfo(console_out, &inf); + oldDisplayAttribute = inf.wAttributes; + BYTE oldLowByte = oldDisplayAttribute & 0xFF; + BYTE newLowByte; + switch (oldLowByte) { + case 0x07: + // newLowByte = FOREGROUND_BLUE | FOREGROUND_INTENSITY; // too dim + // newLowByte = FOREGROUND_BLUE; // even dimmer + newLowByte = FOREGROUND_BLUE | + FOREGROUND_GREEN; // most similar to xterm appearance + break; + case 0x70: + newLowByte = BACKGROUND_BLUE | BACKGROUND_INTENSITY; + break; + default: + newLowByte = oldLowByte ^ 0xFF; // default to inverse video + break; + } + inf.wAttributes = (inf.wAttributes & 0xFF00) | newLowByte; + SetConsoleTextAttribute(console_out, inf.wAttributes); + } else { + SetConsoleTextAttribute(console_out, oldDisplayAttribute); + } +#else + if (enhancedDisplay) { + char const* p = (error ? "\x1b[1;31m" : "\x1b[1;34m"); + if (write(1, p, 7) == -1) + return; /* bright blue (visible with both B&W bg) */ + } else { + if (write(1, "\x1b[0m", 4) == -1) return; /* reset */ + } +#endif +} + +/** + * Display the dynamic incremental search prompt and the current user input + * line. + * @param pi PromptBase struct holding information about the prompt and our + * screen position + * @param buf32 input buffer to be displayed + * @param len count of characters in the buffer + * @param pos current cursor position within the buffer (0 <= pos <= len) + */ +static void dynamicRefresh(PromptBase& pi, char32_t* buf32, int len, int pos) { + // calculate the position of the end of the prompt + int xEndOfPrompt, yEndOfPrompt; + calculateScreenPosition(0, 0, pi.promptScreenColumns, pi.promptChars, + xEndOfPrompt, yEndOfPrompt); + pi.promptIndentation = xEndOfPrompt; + + // calculate the position of the end of the input line + int xEndOfInput, yEndOfInput; + calculateScreenPosition(xEndOfPrompt, yEndOfPrompt, pi.promptScreenColumns, + calculateColumnPosition(buf32, len), xEndOfInput, + yEndOfInput); + + // calculate the desired position of the cursor + int xCursorPos, yCursorPos; + calculateScreenPosition(xEndOfPrompt, yEndOfPrompt, pi.promptScreenColumns, + calculateColumnPosition(buf32, pos), xCursorPos, + yCursorPos); + +#ifdef _WIN32 + // position at the start of the prompt, clear to end of previous input + CONSOLE_SCREEN_BUFFER_INFO inf; + GetConsoleScreenBufferInfo(console_out, &inf); + inf.dwCursorPosition.X = 0; + inf.dwCursorPosition.Y -= pi.promptCursorRowOffset /*- pi.promptExtraLines*/; + SetConsoleCursorPosition(console_out, inf.dwCursorPosition); + DWORD count; + FillConsoleOutputCharacterA(console_out, ' ', + pi.promptPreviousLen + pi.promptPreviousInputLen, + inf.dwCursorPosition, &count); + pi.promptPreviousLen = pi.promptIndentation; + pi.promptPreviousInputLen = len; + + // display the prompt + if (!pi.write()) return; + + // display the input line + if (write32(1, buf32, len) == -1) return; + + // position the cursor + GetConsoleScreenBufferInfo(console_out, &inf); + inf.dwCursorPosition.X = xCursorPos; // 0-based on Win32 + inf.dwCursorPosition.Y -= yEndOfInput - yCursorPos; + SetConsoleCursorPosition(console_out, inf.dwCursorPosition); +#else // _WIN32 + char seq[64]; + int cursorRowMovement = pi.promptCursorRowOffset - pi.promptExtraLines; + if (cursorRowMovement > 0) { // move the cursor up as required + snprintf(seq, sizeof seq, "\x1b[%dA", cursorRowMovement); + if (write(1, seq, strlen(seq)) == -1) return; + } + // position at the start of the prompt, clear to end of screen + snprintf(seq, sizeof seq, "\x1b[1G\x1b[J"); // 1-based on VT100 + if (write(1, seq, strlen(seq)) == -1) return; + + // display the prompt + if (!pi.write()) return; + + // display the input line + if (write32(1, buf32, len) == -1) return; + + // we have to generate our own newline on line wrap + if (xEndOfInput == 0 && yEndOfInput > 0) + if (write(1, "\n", 1) == -1) return; + + // position the cursor + cursorRowMovement = yEndOfInput - yCursorPos; + if (cursorRowMovement > 0) { // move the cursor up as required + snprintf(seq, sizeof seq, "\x1b[%dA", cursorRowMovement); + if (write(1, seq, strlen(seq)) == -1) return; + } + // position the cursor within the line + snprintf(seq, sizeof seq, "\x1b[%dG", xCursorPos + 1); // 1-based on VT100 + if (write(1, seq, strlen(seq)) == -1) return; +#endif + + pi.promptCursorRowOffset = + pi.promptExtraLines + yCursorPos; // remember row for next pass +} + +/** + * Refresh the user's input line: the prompt is already onscreen and is not + * redrawn here + * @param pi PromptBase struct holding information about the prompt and our + * screen position + */ +void InputBuffer::refreshLine(PromptBase& pi) { + // check for a matching brace/bracket/paren, remember its position if found + int highlight = -1; + bool indicateError = false; + if (pos < len) { + /* this scans for a brace matching buf32[pos] to highlight */ + unsigned char part1, part2; + int scanDirection = 0; + if (strchr("}])", buf32[pos])) { + scanDirection = -1; /* backwards */ + if (buf32[pos] == '}') { + part1 = '}'; part2 = '{'; + } else if (buf32[pos] == ']') { + part1 = ']'; part2 = '['; + } else { + part1 = ')'; part2 = '('; + } + } + else if (strchr("{[(", buf32[pos])) { + scanDirection = 1; /* forwards */ + if (buf32[pos] == '{') { + //part1 = '{'; part2 = '}'; + part1 = '}'; part2 = '{'; + } else if (buf32[pos] == '[') { + //part1 = '['; part2 = ']'; + part1 = ']'; part2 = '['; + } else { + //part1 = '('; part2 = ')'; + part1 = ')'; part2 = '('; + } + } + + if (scanDirection) { + int unmatched = scanDirection; + int unmatchedOther = 0; + for (int i = pos + scanDirection; i >= 0 && i < len; i += scanDirection) { + /* TODO: the right thing when inside a string */ + if (strchr("}])", buf32[i])) { + if (buf32[i] == part1) { + --unmatched; + } else { + --unmatchedOther; + } + } else if (strchr("{[(", buf32[i])) { + if (buf32[i] == part2) { + ++unmatched; + } else { + ++unmatchedOther; + } + } +/* + if (strchr("}])", buf32[i])) + --unmatched; + else if (strchr("{[(", buf32[i])) + ++unmatched; +*/ + if (unmatched == 0) { + highlight = i; + indicateError = (unmatchedOther != 0); + break; + } + } + } + } + + // calculate the position of the end of the input line + int xEndOfInput, yEndOfInput; + calculateScreenPosition(pi.promptIndentation, 0, pi.promptScreenColumns, + calculateColumnPosition(buf32, len), xEndOfInput, + yEndOfInput); + + // calculate the desired position of the cursor + int xCursorPos, yCursorPos; + calculateScreenPosition(pi.promptIndentation, 0, pi.promptScreenColumns, + calculateColumnPosition(buf32, pos), xCursorPos, + yCursorPos); + +#ifdef _WIN32 + // position at the end of the prompt, clear to end of previous input + CONSOLE_SCREEN_BUFFER_INFO inf; + GetConsoleScreenBufferInfo(console_out, &inf); + inf.dwCursorPosition.X = pi.promptIndentation; // 0-based on Win32 + inf.dwCursorPosition.Y -= pi.promptCursorRowOffset - pi.promptExtraLines; + SetConsoleCursorPosition(console_out, inf.dwCursorPosition); + DWORD count; + if (len < pi.promptPreviousInputLen) + FillConsoleOutputCharacterA(console_out, ' ', pi.promptPreviousInputLen, + inf.dwCursorPosition, &count); + pi.promptPreviousInputLen = len; + + // display the input line + if (highlight == -1) { + if (write32(1, buf32, len) == -1) return; + } else { + if (write32(1, buf32, highlight) == -1) return; + setDisplayAttribute(true, indicateError); /* bright blue (visible with both B&W bg) */ + if (write32(1, &buf32[highlight], 1) == -1) return; + setDisplayAttribute(false, indicateError); + if (write32(1, buf32 + highlight + 1, len - highlight - 1) == -1) return; + } + + // position the cursor + GetConsoleScreenBufferInfo(console_out, &inf); + inf.dwCursorPosition.X = xCursorPos; // 0-based on Win32 + inf.dwCursorPosition.Y -= yEndOfInput - yCursorPos; + SetConsoleCursorPosition(console_out, inf.dwCursorPosition); +#else // _WIN32 + char seq[64]; + int cursorRowMovement = pi.promptCursorRowOffset - pi.promptExtraLines; + if (cursorRowMovement > 0) { // move the cursor up as required + snprintf(seq, sizeof seq, "\x1b[%dA", cursorRowMovement); + if (write(1, seq, strlen(seq)) == -1) return; + } + // position at the end of the prompt, clear to end of screen + snprintf(seq, sizeof seq, "\x1b[%dG\x1b[J", + pi.promptIndentation + 1); // 1-based on VT100 + if (write(1, seq, strlen(seq)) == -1) return; + + if (highlight == -1) { // write unhighlighted text + if (write32(1, buf32, len) == -1) return; + } else { // highlight the matching brace/bracket/parenthesis + if (write32(1, buf32, highlight) == -1) return; + setDisplayAttribute(true, indicateError); + if (write32(1, &buf32[highlight], 1) == -1) return; + setDisplayAttribute(false, indicateError); + if (write32(1, buf32 + highlight + 1, len - highlight - 1) == -1) return; + } + + // we have to generate our own newline on line wrap + if (xEndOfInput == 0 && yEndOfInput > 0) + if (write(1, "\n", 1) == -1) return; + + // position the cursor + cursorRowMovement = yEndOfInput - yCursorPos; + if (cursorRowMovement > 0) { // move the cursor up as required + snprintf(seq, sizeof seq, "\x1b[%dA", cursorRowMovement); + if (write(1, seq, strlen(seq)) == -1) return; + } + // position the cursor within the line + snprintf(seq, sizeof seq, "\x1b[%dG", xCursorPos + 1); // 1-based on VT100 + if (write(1, seq, strlen(seq)) == -1) return; +#endif + + pi.promptCursorRowOffset = + pi.promptExtraLines + yCursorPos; // remember row for next pass +} + +#ifndef _WIN32 + +/** + * Read a UTF-8 sequence from the non-Windows keyboard and return the Unicode + * (char32_t) character it + * encodes + * + * @return char32_t Unicode character + */ +static char32_t readUnicodeCharacter(void) { + static char8_t utf8String[5]; + static size_t utf8Count = 0; + while (true) { + char8_t c; + + /* Continue reading if interrupted by signal. */ + ssize_t nread; + do { + nread = read(0, &c, 1); + } while ((nread == -1) && (errno == EINTR)); + + if (nread <= 0) return 0; + if (c <= 0x7F) { // short circuit ASCII + utf8Count = 0; + return c; + } else if (utf8Count < sizeof(utf8String) - 1) { + utf8String[utf8Count++] = c; + utf8String[utf8Count] = 0; + char32_t unicodeChar[2]; + size_t ucharCount; + ConversionResult res = + copyString8to32(unicodeChar, 2, ucharCount, utf8String); + if (res == conversionOK && ucharCount) { + utf8Count = 0; + return unicodeChar[0]; + } + } else { + utf8Count = + 0; // this shouldn't happen: got four bytes but no UTF-8 character + } + } +} + +namespace EscapeSequenceProcessing { // move these out of global namespace + +// This chunk of code does parsing of the escape sequences sent by various Linux +// terminals. +// +// It handles arrow keys, Home, End and Delete keys by interpreting the +// sequences sent by +// gnome terminal, xterm, rxvt, konsole, aterm and yakuake including the Alt and +// Ctrl key +// combinations that are understood by linenoise. +// +// The parsing uses tables, a bunch of intermediate dispatch routines and a +// doDispatch +// loop that reads the tables and sends control to "deeper" routines to continue +// the +// parsing. The starting call to doDispatch( c, initialDispatch ) will +// eventually return +// either a character (with optional CTRL and META bits set), or -1 if parsing +// fails, or +// zero if an attempt to read from the keyboard fails. +// +// This is rather sloppy escape sequence processing, since we're not paying +// attention to what the +// actual TERM is set to and are processing all key sequences for all terminals, +// but it works with +// the most common keystrokes on the most common terminals. It's intricate, but +// the nested 'if' +// statements required to do it directly would be worse. This way has the +// advantage of allowing +// changes and extensions without having to touch a lot of code. + +// This is a typedef for the routine called by doDispatch(). It takes the +// current character +// as input, does any required processing including reading more characters and +// calling other +// dispatch routines, then eventually returns the final (possibly extended or +// special) character. +// +typedef char32_t (*CharacterDispatchRoutine)(char32_t); + +// This structure is used by doDispatch() to hold a list of characters to test +// for and +// a list of routines to call if the character matches. The dispatch routine +// list is one +// longer than the character list; the final entry is used if no character +// matches. +// +struct CharacterDispatch { + unsigned int len; // length of the chars list + const char* chars; // chars to test + CharacterDispatchRoutine* dispatch; // array of routines to call +}; + +// This dispatch routine is given a dispatch table and then farms work out to +// routines +// listed in the table based on the character it is called with. The dispatch +// routines can +// read more input characters to decide what should eventually be returned. +// Eventually, +// a called routine returns either a character or -1 to indicate parsing +// failure. +// +static char32_t doDispatch(char32_t c, CharacterDispatch& dispatchTable) { + for (unsigned int i = 0; i < dispatchTable.len; ++i) { + if (static_cast<unsigned char>(dispatchTable.chars[i]) == c) { + return dispatchTable.dispatch[i](c); + } + } + return dispatchTable.dispatch[dispatchTable.len](c); +} + +static char32_t thisKeyMetaCtrl = + 0; // holds pre-set Meta and/or Ctrl modifiers + +// Final dispatch routines -- return something +// +static char32_t normalKeyRoutine(char32_t c) { return thisKeyMetaCtrl | c; } +static char32_t upArrowKeyRoutine(char32_t) { + return thisKeyMetaCtrl | UP_ARROW_KEY; +} +static char32_t downArrowKeyRoutine(char32_t) { + return thisKeyMetaCtrl | DOWN_ARROW_KEY; +} +static char32_t rightArrowKeyRoutine(char32_t) { + return thisKeyMetaCtrl | RIGHT_ARROW_KEY; +} +static char32_t leftArrowKeyRoutine(char32_t) { + return thisKeyMetaCtrl | LEFT_ARROW_KEY; +} +static char32_t homeKeyRoutine(char32_t) { return thisKeyMetaCtrl | HOME_KEY; } +static char32_t endKeyRoutine(char32_t) { return thisKeyMetaCtrl | END_KEY; } +static char32_t pageUpKeyRoutine(char32_t) { + return thisKeyMetaCtrl | PAGE_UP_KEY; +} +static char32_t pageDownKeyRoutine(char32_t) { + return thisKeyMetaCtrl | PAGE_DOWN_KEY; +} +static char32_t deleteCharRoutine(char32_t) { + return thisKeyMetaCtrl | ctrlChar('H'); +} // key labeled Backspace +static char32_t deleteKeyRoutine(char32_t) { + return thisKeyMetaCtrl | DELETE_KEY; +} // key labeled Delete +static char32_t ctrlUpArrowKeyRoutine(char32_t) { + return thisKeyMetaCtrl | CTRL | UP_ARROW_KEY; +} +static char32_t ctrlDownArrowKeyRoutine(char32_t) { + return thisKeyMetaCtrl | CTRL | DOWN_ARROW_KEY; +} +static char32_t ctrlRightArrowKeyRoutine(char32_t) { + return thisKeyMetaCtrl | CTRL | RIGHT_ARROW_KEY; +} +static char32_t ctrlLeftArrowKeyRoutine(char32_t) { + return thisKeyMetaCtrl | CTRL | LEFT_ARROW_KEY; +} +static char32_t escFailureRoutine(char32_t) { + beep(); + return -1; +} + +// Handle ESC [ 1 ; 3 (or 5) <more stuff> escape sequences +// +static CharacterDispatchRoutine escLeftBracket1Semicolon3or5Routines[] = { + upArrowKeyRoutine, downArrowKeyRoutine, rightArrowKeyRoutine, + leftArrowKeyRoutine, escFailureRoutine}; +static CharacterDispatch escLeftBracket1Semicolon3or5Dispatch = { + 4, "ABCD", escLeftBracket1Semicolon3or5Routines}; + +// Handle ESC [ 1 ; <more stuff> escape sequences +// +static char32_t escLeftBracket1Semicolon3Routine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + thisKeyMetaCtrl |= META; + return doDispatch(c, escLeftBracket1Semicolon3or5Dispatch); +} +static char32_t escLeftBracket1Semicolon5Routine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + thisKeyMetaCtrl |= CTRL; + return doDispatch(c, escLeftBracket1Semicolon3or5Dispatch); +} +static CharacterDispatchRoutine escLeftBracket1SemicolonRoutines[] = { + escLeftBracket1Semicolon3Routine, escLeftBracket1Semicolon5Routine, + escFailureRoutine}; +static CharacterDispatch escLeftBracket1SemicolonDispatch = { + 2, "35", escLeftBracket1SemicolonRoutines}; + +// Handle ESC [ 1 <more stuff> escape sequences +// +static char32_t escLeftBracket1SemicolonRoutine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escLeftBracket1SemicolonDispatch); +} +static CharacterDispatchRoutine escLeftBracket1Routines[] = { + homeKeyRoutine, escLeftBracket1SemicolonRoutine, escFailureRoutine}; +static CharacterDispatch escLeftBracket1Dispatch = {2, "~;", + escLeftBracket1Routines}; + +// Handle ESC [ 3 <more stuff> escape sequences +// +static CharacterDispatchRoutine escLeftBracket3Routines[] = {deleteKeyRoutine, + escFailureRoutine}; +static CharacterDispatch escLeftBracket3Dispatch = {1, "~", + escLeftBracket3Routines}; + +// Handle ESC [ 4 <more stuff> escape sequences +// +static CharacterDispatchRoutine escLeftBracket4Routines[] = {endKeyRoutine, + escFailureRoutine}; +static CharacterDispatch escLeftBracket4Dispatch = {1, "~", + escLeftBracket4Routines}; + +// Handle ESC [ 5 <more stuff> escape sequences +// +static CharacterDispatchRoutine escLeftBracket5Routines[] = {pageUpKeyRoutine, + escFailureRoutine}; +static CharacterDispatch escLeftBracket5Dispatch = {1, "~", + escLeftBracket5Routines}; + +// Handle ESC [ 6 <more stuff> escape sequences +// +static CharacterDispatchRoutine escLeftBracket6Routines[] = {pageDownKeyRoutine, + escFailureRoutine}; +static CharacterDispatch escLeftBracket6Dispatch = {1, "~", + escLeftBracket6Routines}; + +// Handle ESC [ 7 <more stuff> escape sequences +// +static CharacterDispatchRoutine escLeftBracket7Routines[] = {homeKeyRoutine, + escFailureRoutine}; +static CharacterDispatch escLeftBracket7Dispatch = {1, "~", + escLeftBracket7Routines}; + +// Handle ESC [ 8 <more stuff> escape sequences +// +static CharacterDispatchRoutine escLeftBracket8Routines[] = {endKeyRoutine, + escFailureRoutine}; +static CharacterDispatch escLeftBracket8Dispatch = {1, "~", + escLeftBracket8Routines}; + +// Handle ESC [ <digit> escape sequences +// +static char32_t escLeftBracket0Routine(char32_t c) { + return escFailureRoutine(c); +} +static char32_t escLeftBracket1Routine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escLeftBracket1Dispatch); +} +static char32_t escLeftBracket2Routine(char32_t c) { + return escFailureRoutine(c); // Insert key, unused +} +static char32_t escLeftBracket3Routine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escLeftBracket3Dispatch); +} +static char32_t escLeftBracket4Routine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escLeftBracket4Dispatch); +} +static char32_t escLeftBracket5Routine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escLeftBracket5Dispatch); +} +static char32_t escLeftBracket6Routine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escLeftBracket6Dispatch); +} +static char32_t escLeftBracket7Routine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escLeftBracket7Dispatch); +} +static char32_t escLeftBracket8Routine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escLeftBracket8Dispatch); +} +static char32_t escLeftBracket9Routine(char32_t c) { + return escFailureRoutine(c); +} + +// Handle ESC [ <more stuff> escape sequences +// +static CharacterDispatchRoutine escLeftBracketRoutines[] = { + upArrowKeyRoutine, downArrowKeyRoutine, rightArrowKeyRoutine, + leftArrowKeyRoutine, homeKeyRoutine, endKeyRoutine, + escLeftBracket0Routine, escLeftBracket1Routine, escLeftBracket2Routine, + escLeftBracket3Routine, escLeftBracket4Routine, escLeftBracket5Routine, + escLeftBracket6Routine, escLeftBracket7Routine, escLeftBracket8Routine, + escLeftBracket9Routine, escFailureRoutine}; +static CharacterDispatch escLeftBracketDispatch = {16, "ABCDHF0123456789", + escLeftBracketRoutines}; + +// Handle ESC O <char> escape sequences +// +static CharacterDispatchRoutine escORoutines[] = { + upArrowKeyRoutine, downArrowKeyRoutine, rightArrowKeyRoutine, + leftArrowKeyRoutine, homeKeyRoutine, endKeyRoutine, + ctrlUpArrowKeyRoutine, ctrlDownArrowKeyRoutine, ctrlRightArrowKeyRoutine, + ctrlLeftArrowKeyRoutine, escFailureRoutine}; +static CharacterDispatch escODispatch = {10, "ABCDHFabcd", escORoutines}; + +// Initial ESC dispatch -- could be a Meta prefix or the start of an escape +// sequence +// +static char32_t escLeftBracketRoutine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escLeftBracketDispatch); +} +static char32_t escORoutine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escODispatch); +} +static char32_t setMetaRoutine(char32_t c); // need forward reference +static CharacterDispatchRoutine escRoutines[] = {escLeftBracketRoutine, + escORoutine, setMetaRoutine}; +static CharacterDispatch escDispatch = {2, "[O", escRoutines}; + +// Initial dispatch -- we are not in the middle of anything yet +// +static char32_t escRoutine(char32_t c) { + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escDispatch); +} +static CharacterDispatchRoutine initialRoutines[] = { + escRoutine, deleteCharRoutine, normalKeyRoutine}; +static CharacterDispatch initialDispatch = {2, "\x1B\x7F", initialRoutines}; + +// Special handling for the ESC key because it does double duty +// +static char32_t setMetaRoutine(char32_t c) { + thisKeyMetaCtrl = META; + if (c == 0x1B) { // another ESC, stay in ESC processing mode + c = readUnicodeCharacter(); + if (c == 0) return 0; + return doDispatch(c, escDispatch); + } + return doDispatch(c, initialDispatch); +} + +} // namespace EscapeSequenceProcessing // move these out of global namespace + +#endif // #ifndef _WIN32 + +// linenoiseReadChar -- read a keystroke or keychord from the keyboard, and +// translate it +// into an encoded "keystroke". When convenient, extended keys are translated +// into their +// simpler Emacs keystrokes, so an unmodified "left arrow" becomes Ctrl-B. +// +// A return value of zero means "no input available", and a return value of -1 +// means "invalid key". +// +static char32_t linenoiseReadChar(void) { +#ifdef _WIN32 + + INPUT_RECORD rec; + DWORD count; + int modifierKeys = 0; + bool escSeen = false; + while (true) { + ReadConsoleInputW(console_in, &rec, 1, &count); +#if 0 // helper for debugging keystrokes, display info in the debug "Output" + // window in the debugger + { + if ( rec.EventType == KEY_EVENT ) { + //if ( rec.Event.KeyEvent.uChar.UnicodeChar ) { + char buf[1024]; + sprintf( + buf, + "Unicode character 0x%04X, repeat count %d, virtual keycode 0x%04X, " + "virtual scancode 0x%04X, key %s%s%s%s%s\n", + rec.Event.KeyEvent.uChar.UnicodeChar, + rec.Event.KeyEvent.wRepeatCount, + rec.Event.KeyEvent.wVirtualKeyCode, + rec.Event.KeyEvent.wVirtualScanCode, + rec.Event.KeyEvent.bKeyDown ? "down" : "up", + (rec.Event.KeyEvent.dwControlKeyState & LEFT_CTRL_PRESSED) ? + " L-Ctrl" : "", + (rec.Event.KeyEvent.dwControlKeyState & RIGHT_CTRL_PRESSED) ? + " R-Ctrl" : "", + (rec.Event.KeyEvent.dwControlKeyState & LEFT_ALT_PRESSED) ? + " L-Alt" : "", + (rec.Event.KeyEvent.dwControlKeyState & RIGHT_ALT_PRESSED) ? + " R-Alt" : "" + ); + OutputDebugStringA( buf ); + //} + } + } +#endif + if (rec.EventType != KEY_EVENT) { + continue; + } + // Windows provides for entry of characters that are not on your keyboard by + // sending the + // Unicode characters as a "key up" with virtual keycode 0x12 (VK_MENU == + // Alt key) ... + // accept these characters, otherwise only process characters on "key down" + if (!rec.Event.KeyEvent.bKeyDown && + rec.Event.KeyEvent.wVirtualKeyCode != VK_MENU) { + continue; + } + modifierKeys = 0; + // AltGr is encoded as ( LEFT_CTRL_PRESSED | RIGHT_ALT_PRESSED ), so don't + // treat this + // combination as either CTRL or META we just turn off those two bits, so it + // is still + // possible to combine CTRL and/or META with an AltGr key by using + // right-Ctrl and/or + // left-Alt + if ((rec.Event.KeyEvent.dwControlKeyState & + (LEFT_CTRL_PRESSED | RIGHT_ALT_PRESSED)) == + (LEFT_CTRL_PRESSED | RIGHT_ALT_PRESSED)) { + rec.Event.KeyEvent.dwControlKeyState &= + ~(LEFT_CTRL_PRESSED | RIGHT_ALT_PRESSED); + } + if (rec.Event.KeyEvent.dwControlKeyState & + (RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED)) { + modifierKeys |= CTRL; + } + if (rec.Event.KeyEvent.dwControlKeyState & + (RIGHT_ALT_PRESSED | LEFT_ALT_PRESSED)) { + modifierKeys |= META; + } + if (escSeen) { + modifierKeys |= META; + } + if (rec.Event.KeyEvent.uChar.UnicodeChar == 0) { + switch (rec.Event.KeyEvent.wVirtualKeyCode) { + case VK_LEFT: + return modifierKeys | LEFT_ARROW_KEY; + case VK_RIGHT: + return modifierKeys | RIGHT_ARROW_KEY; + case VK_UP: + return modifierKeys | UP_ARROW_KEY; + case VK_DOWN: + return modifierKeys | DOWN_ARROW_KEY; + case VK_DELETE: + return modifierKeys | DELETE_KEY; + case VK_HOME: + return modifierKeys | HOME_KEY; + case VK_END: + return modifierKeys | END_KEY; + case VK_PRIOR: + return modifierKeys | PAGE_UP_KEY; + case VK_NEXT: + return modifierKeys | PAGE_DOWN_KEY; + default: + continue; // in raw mode, ReadConsoleInput shows shift, ctrl ... + } // ... ignore them + } else if (rec.Event.KeyEvent.uChar.UnicodeChar == + ctrlChar('[')) { // ESC, set flag for later + escSeen = true; + continue; + } else { + // we got a real character, return it + return modifierKeys | rec.Event.KeyEvent.uChar.UnicodeChar; + } + } + +#else + char32_t c; + c = readUnicodeCharacter(); + if (c == 0) return 0; + +// If _DEBUG_LINUX_KEYBOARD is set, then ctrl-^ puts us into a keyboard +// debugging mode +// where we print out decimal and decoded values for whatever the "terminal" +// program +// gives us on different keystrokes. Hit ctrl-C to exit this mode. +// +#define _DEBUG_LINUX_KEYBOARD +#if defined(_DEBUG_LINUX_KEYBOARD) + if (c == ctrlChar('^')) { // ctrl-^, special debug mode, prints all keys hit, + // ctrl-C to get out + printf( + "\nEntering keyboard debugging mode (on ctrl-^), press ctrl-C to exit " + "this mode\n"); + while (true) { + unsigned char keys[10]; + int ret = read(0, keys, 10); + + if (ret <= 0) { + printf("\nret: %d\n", ret); + } + for (int i = 0; i < ret; ++i) { + char32_t key = static_cast<char32_t>(keys[i]); + char* friendlyTextPtr; + char friendlyTextBuf[10]; + const char* prefixText = (key < 0x80) ? "" : "0x80+"; + char32_t keyCopy = (key < 0x80) ? key : key - 0x80; + if (keyCopy >= '!' && keyCopy <= '~') { // printable + friendlyTextBuf[0] = '\''; + friendlyTextBuf[1] = keyCopy; + friendlyTextBuf[2] = '\''; + friendlyTextBuf[3] = 0; + friendlyTextPtr = friendlyTextBuf; + } else if (keyCopy == ' ') { + friendlyTextPtr = const_cast<char*>("space"); + } else if (keyCopy == 27) { + friendlyTextPtr = const_cast<char*>("ESC"); + } else if (keyCopy == 0) { + friendlyTextPtr = const_cast<char*>("NUL"); + } else if (keyCopy == 127) { + friendlyTextPtr = const_cast<char*>("DEL"); + } else { + friendlyTextBuf[0] = '^'; + friendlyTextBuf[1] = keyCopy + 0x40; + friendlyTextBuf[2] = 0; + friendlyTextPtr = friendlyTextBuf; + } + printf("%d x%02X (%s%s) ", key, key, prefixText, friendlyTextPtr); + } + printf("\x1b[1G\n"); // go to first column of new line + + // drop out of this loop on ctrl-C + if (keys[0] == ctrlChar('C')) { + printf("Leaving keyboard debugging mode (on ctrl-C)\n"); + fflush(stdout); + return -2; + } + } + } +#endif // _DEBUG_LINUX_KEYBOARD + + EscapeSequenceProcessing::thisKeyMetaCtrl = + 0; // no modifiers yet at initialDispatch + return EscapeSequenceProcessing::doDispatch( + c, EscapeSequenceProcessing::initialDispatch); +#endif // #_WIN32 +} + +/** + * Free memory used in a recent command completion session + * + * @param lc pointer to a linenoiseCompletions struct + */ +static void freeCompletions(linenoiseCompletions* lc) { + lc->completionStrings.clear(); +} + +/** + * convert {CTRL + 'A'}, {CTRL + 'a'} and {CTRL + ctrlChar( 'A' )} into + * ctrlChar( 'A' ) + * leave META alone + * + * @param c character to clean up + * @return cleaned-up character + */ +static int cleanupCtrl(int c) { + if (c & CTRL) { + int d = c & 0x1FF; + if (d >= 'a' && d <= 'z') { + c = (c + ('a' - ctrlChar('A'))) & ~CTRL; + } + if (d >= 'A' && d <= 'Z') { + c = (c + ('A' - ctrlChar('A'))) & ~CTRL; + } + if (d >= ctrlChar('A') && d <= ctrlChar('Z')) { + c = c & ~CTRL; + } + } + return c; +} + +// break characters that may precede items to be completed +static const char breakChars[] = " =+-/\\*?\"'`&<>;|@{([])}"; + +// maximum number of completions to display without asking +static const size_t completionCountCutoff = 100; + +/** + * Handle command completion, using a completionCallback() routine to provide + * possible substitutions + * This routine handles the mechanics of updating the user's input buffer with + * possible replacement + * of text as the user selects a proposed completion string, or cancels the + * completion attempt. + * @param pi PromptBase struct holding information about the prompt and our + * screen position + */ +int InputBuffer::completeLine(PromptBase& pi) { + linenoiseCompletions lc; + char32_t c = 0; + + // completionCallback() expects a parsable entity, so find the previous break + // character and + // extract a copy to parse. we also handle the case where tab is hit while + // not at end-of-line. + int startIndex = pos; + while (--startIndex >= 0) { + if (strchr(breakChars, buf32[startIndex])) { + break; + } + } + ++startIndex; + int itemLength = pos - startIndex; + Utf32String unicodeCopy(&buf32[startIndex], itemLength); + Utf8String parseItem(unicodeCopy); + + // get a list of completions + completionCallback(parseItem.get(), &lc); + + // if no completions, we are done + if (lc.completionStrings.size() == 0) { + beep(); + freeCompletions(&lc); + return 0; + } + + // at least one completion + int longestCommonPrefix = 0; + int displayLength = 0; + if (lc.completionStrings.size() == 1) { + longestCommonPrefix = static_cast<int>(lc.completionStrings[0].length()); + } else { + bool keepGoing = true; + while (keepGoing) { + for (size_t j = 0; j < lc.completionStrings.size() - 1; ++j) { + char32_t c1 = lc.completionStrings[j][longestCommonPrefix]; + char32_t c2 = lc.completionStrings[j + 1][longestCommonPrefix]; + if ((0 == c1) || (0 == c2) || (c1 != c2)) { + keepGoing = false; + break; + } + } + if (keepGoing) { + ++longestCommonPrefix; + } + } + } + if (lc.completionStrings.size() != 1) { // beep if ambiguous + beep(); + } + + // if we can extend the item, extend it and return to main loop + if (longestCommonPrefix > itemLength) { + displayLength = len + longestCommonPrefix - itemLength; + if (displayLength > buflen) { + longestCommonPrefix -= displayLength - buflen; // don't overflow buffer + displayLength = buflen; // truncate the insertion + beep(); // and make a noise + } + Utf32String displayText(displayLength + 1); + memcpy(displayText.get(), buf32, sizeof(char32_t) * startIndex); + memcpy(&displayText[startIndex], &lc.completionStrings[0][0], + sizeof(char32_t) * longestCommonPrefix); + int tailIndex = startIndex + longestCommonPrefix; + memcpy(&displayText[tailIndex], &buf32[pos], + sizeof(char32_t) * (displayLength - tailIndex + 1)); + copyString32(buf32, displayText.get(), displayLength); + pos = startIndex + longestCommonPrefix; + len = displayLength; + refreshLine(pi); + return 0; + } + + // we can't complete any further, wait for second tab + do { + c = linenoiseReadChar(); + c = cleanupCtrl(c); + } while (c == static_cast<char32_t>(-1)); + + // if any character other than tab, pass it to the main loop + if (c != ctrlChar('I')) { + freeCompletions(&lc); + return c; + } + + // we got a second tab, maybe show list of possible completions + bool showCompletions = true; + bool onNewLine = false; + if (lc.completionStrings.size() > completionCountCutoff) { + int savePos = + pos; // move cursor to EOL to avoid overwriting the command line + pos = len; + refreshLine(pi); + pos = savePos; + printf("\nDisplay all %u possibilities? (y or n)", + static_cast<unsigned int>(lc.completionStrings.size())); + fflush(stdout); + onNewLine = true; + while (c != 'y' && c != 'Y' && c != 'n' && c != 'N' && c != ctrlChar('C')) { + do { + c = linenoiseReadChar(); + c = cleanupCtrl(c); + } while (c == static_cast<char32_t>(-1)); + } + switch (c) { + case 'n': + case 'N': + showCompletions = false; + freeCompletions(&lc); + break; + case ctrlChar('C'): + showCompletions = false; + freeCompletions(&lc); + if (write(1, "^C", 2) == -1) return -1; // Display the ^C we got + c = 0; + break; + } + } + + // if showing the list, do it the way readline does it + bool stopList = false; + if (showCompletions) { + int longestCompletion = 0; + for (size_t j = 0; j < lc.completionStrings.size(); ++j) { + itemLength = static_cast<int>(lc.completionStrings[j].length()); + if (itemLength > longestCompletion) { + longestCompletion = itemLength; + } + } + longestCompletion += 2; + int columnCount = pi.promptScreenColumns / longestCompletion; + if (columnCount < 1) { + columnCount = 1; + } + if (!onNewLine) { // skip this if we showed "Display all %d possibilities?" + int savePos = + pos; // move cursor to EOL to avoid overwriting the command line + pos = len; + refreshLine(pi); + pos = savePos; + } + size_t pauseRow = getScreenRows() - 1; + size_t rowCount = + (lc.completionStrings.size() + columnCount - 1) / columnCount; + for (size_t row = 0; row < rowCount; ++row) { + if (row == pauseRow) { + printf("\n--More--"); + fflush(stdout); + c = 0; + bool doBeep = false; + while (c != ' ' && c != '\r' && c != '\n' && c != 'y' && c != 'Y' && + c != 'n' && c != 'N' && c != 'q' && c != 'Q' && + c != ctrlChar('C')) { + if (doBeep) { + beep(); + } + doBeep = true; + do { + c = linenoiseReadChar(); + c = cleanupCtrl(c); + } while (c == static_cast<char32_t>(-1)); + } + switch (c) { + case ' ': + case 'y': + case 'Y': + printf("\r \r"); + pauseRow += getScreenRows() - 1; + break; + case '\r': + case '\n': + printf("\r \r"); + ++pauseRow; + break; + case 'n': + case 'N': + case 'q': + case 'Q': + printf("\r \r"); + stopList = true; + break; + case ctrlChar('C'): + if (write(1, "^C", 2) == -1) return -1; // Display the ^C we got + stopList = true; + break; + } + } else { + printf("\n"); + } + if (stopList) { + break; + } + for (int column = 0; column < columnCount; ++column) { + size_t index = (column * rowCount) + row; + if (index < lc.completionStrings.size()) { + itemLength = static_cast<int>(lc.completionStrings[index].length()); + fflush(stdout); + if (write32(1, lc.completionStrings[index].get(), itemLength) == -1) + return -1; + if (((column + 1) * rowCount) + row < lc.completionStrings.size()) { + for (int k = itemLength; k < longestCompletion; ++k) { + printf(" "); + } + } + } + } + } + fflush(stdout); + freeCompletions(&lc); + } + + // display the prompt on a new line, then redisplay the input buffer + if (!stopList || c == ctrlChar('C')) { + if (write(1, "\n", 1) == -1) return 0; + } + if (!pi.write()) return 0; +#ifndef _WIN32 + // we have to generate our own newline on line wrap on Linux + if (pi.promptIndentation == 0 && pi.promptExtraLines > 0) + if (write(1, "\n", 1) == -1) return 0; +#endif + pi.promptCursorRowOffset = pi.promptExtraLines; + refreshLine(pi); + return 0; +} + +/** + * Clear the screen ONLY (no redisplay of anything) + */ +void linenoiseClearScreen(void) { +#ifdef _WIN32 + COORD coord = {0, 0}; + CONSOLE_SCREEN_BUFFER_INFO inf; + HANDLE screenHandle = GetStdHandle(STD_OUTPUT_HANDLE); + GetConsoleScreenBufferInfo(screenHandle, &inf); + SetConsoleCursorPosition(screenHandle, coord); + DWORD count; + FillConsoleOutputCharacterA(screenHandle, ' ', inf.dwSize.X * inf.dwSize.Y, + coord, &count); +#else + if (write(1, "\x1b[H\x1b[2J", 7) <= 0) return; +#endif +} + +void InputBuffer::clearScreen(PromptBase& pi) { + linenoiseClearScreen(); + if (!pi.write()) return; +#ifndef _WIN32 + // we have to generate our own newline on line wrap on Linux + if (pi.promptIndentation == 0 && pi.promptExtraLines > 0) + if (write(1, "\n", 1) == -1) return; +#endif + pi.promptCursorRowOffset = pi.promptExtraLines; + refreshLine(pi); +} + +/** + * Incremental history search -- take over the prompt and keyboard as the user + * types a search + * string, deletes characters from it, changes direction, and either accepts the + * found line (for + * execution orediting) or cancels. + * @param pi PromptBase struct holding information about the (old, + * static) prompt and our + * screen position + * @param startChar the character that began the search, used to set the initial + * direction + */ +int InputBuffer::incrementalHistorySearch(PromptBase& pi, int startChar) { + size_t bufferSize; + size_t ucharCount = 0; + + // if not already recalling, add the current line to the history list so we + // don't have to + // special case it + if (historyIndex == historyLen - 1) { + free(history[historyLen - 1]); + bufferSize = sizeof(char32_t) * len + 1; + unique_ptr<char[]> tempBuffer(new char[bufferSize]); + copyString32to8(tempBuffer.get(), bufferSize, buf32); + history[historyLen - 1] = strdup8(tempBuffer.get()); + } + int historyLineLength = len; + int historyLinePosition = pos; + char32_t emptyBuffer[1]; + char emptyWidths[1]; + InputBuffer empty(emptyBuffer, emptyWidths, 1); + empty.refreshLine(pi); // erase the old input first + DynamicPrompt dp(pi, (startChar == ctrlChar('R')) ? -1 : 1); + + dp.promptPreviousLen = pi.promptPreviousLen; + dp.promptPreviousInputLen = pi.promptPreviousInputLen; + dynamicRefresh(dp, buf32, historyLineLength, + historyLinePosition); // draw user's text with our prompt + + // loop until we get an exit character + int c = 0; + bool keepLooping = true; + bool useSearchedLine = true; + bool searchAgain = false; + char32_t* activeHistoryLine = 0; + while (keepLooping) { + c = linenoiseReadChar(); + c = cleanupCtrl(c); // convert CTRL + <char> into normal ctrl + + switch (c) { + // these characters keep the selected text but do not execute it + case ctrlChar('A'): // ctrl-A, move cursor to start of line + case HOME_KEY: + case ctrlChar('B'): // ctrl-B, move cursor left by one character + case LEFT_ARROW_KEY: + case META + 'b': // meta-B, move cursor left by one word + case META + 'B': + case CTRL + LEFT_ARROW_KEY: + case META + LEFT_ARROW_KEY: // Emacs allows Meta, bash & readline don't + case ctrlChar('D'): + case META + 'd': // meta-D, kill word to right of cursor + case META + 'D': + case ctrlChar('E'): // ctrl-E, move cursor to end of line + case END_KEY: + case ctrlChar('F'): // ctrl-F, move cursor right by one character + case RIGHT_ARROW_KEY: + case META + 'f': // meta-F, move cursor right by one word + case META + 'F': + case CTRL + RIGHT_ARROW_KEY: + case META + RIGHT_ARROW_KEY: // Emacs allows Meta, bash & readline don't + case META + ctrlChar('H'): + case ctrlChar('J'): + case ctrlChar('K'): // ctrl-K, kill from cursor to end of line + case ctrlChar('M'): + case ctrlChar('N'): // ctrl-N, recall next line in history + case ctrlChar('P'): // ctrl-P, recall previous line in history + case DOWN_ARROW_KEY: + case UP_ARROW_KEY: + case ctrlChar('T'): // ctrl-T, transpose characters + case ctrlChar( + 'U'): // ctrl-U, kill all characters to the left of the cursor + case ctrlChar('W'): + case META + 'y': // meta-Y, "yank-pop", rotate popped text + case META + 'Y': + case 127: + case DELETE_KEY: + case META + '<': // start of history + case PAGE_UP_KEY: + case META + '>': // end of history + case PAGE_DOWN_KEY: + keepLooping = false; + break; + + // these characters revert the input line to its previous state + case ctrlChar('C'): // ctrl-C, abort this line + case ctrlChar('G'): + case ctrlChar('L'): // ctrl-L, clear screen and redisplay line + keepLooping = false; + useSearchedLine = false; + if (c != ctrlChar('L')) { + c = -1; // ctrl-C and ctrl-G just abort the search and do nothing + // else + } + break; + + // these characters stay in search mode and update the display + case ctrlChar('S'): + case ctrlChar('R'): + if (dp.searchTextLen == + 0) { // if no current search text, recall previous text + if (previousSearchText.length()) { + dp.updateSearchText(previousSearchText.get()); + } + } + if ((dp.direction == 1 && c == ctrlChar('R')) || + (dp.direction == -1 && c == ctrlChar('S'))) { + dp.direction = 0 - dp.direction; // reverse direction + dp.updateSearchPrompt(); // change the prompt + } else { + searchAgain = true; // same direction, search again + } + break; + +// job control is its own thing +#ifndef _WIN32 + case ctrlChar('Z'): // ctrl-Z, job control + disableRawMode(); // Returning to Linux (whatever) shell, leave raw + // mode + raise(SIGSTOP); // Break out in mid-line + enableRawMode(); // Back from Linux shell, re-enter raw mode + { + bufferSize = historyLineLength + 1; + unique_ptr<char32_t[]> tempUnicode(new char32_t[bufferSize]); + copyString8to32(tempUnicode.get(), bufferSize, ucharCount, + history[historyIndex]); + dynamicRefresh(dp, tempUnicode.get(), historyLineLength, + historyLinePosition); + } + continue; + break; +#endif + + // these characters update the search string, and hence the selected input + // line + case ctrlChar('H'): // backspace/ctrl-H, delete char to left of cursor + if (dp.searchTextLen > 0) { + unique_ptr<char32_t[]> tempUnicode(new char32_t[dp.searchTextLen]); + --dp.searchTextLen; + dp.searchText[dp.searchTextLen] = 0; + copyString32(tempUnicode.get(), dp.searchText.get(), + dp.searchTextLen); + dp.updateSearchText(tempUnicode.get()); + } else { + beep(); + } + break; + + case ctrlChar('Y'): // ctrl-Y, yank killed text + break; + + default: + if (!isControlChar(c) && c <= 0x0010FFFF) { // not an action character + unique_ptr<char32_t[]> tempUnicode( + new char32_t[dp.searchTextLen + 2]); + copyString32(tempUnicode.get(), dp.searchText.get(), + dp.searchTextLen); + tempUnicode[dp.searchTextLen] = c; + tempUnicode[dp.searchTextLen + 1] = 0; + dp.updateSearchText(tempUnicode.get()); + } else { + beep(); + } + } // switch + + // if we are staying in search mode, search now + if (keepLooping) { + bufferSize = historyLineLength + 1; + if (activeHistoryLine) { + delete[] activeHistoryLine; + activeHistoryLine = nullptr; + } + activeHistoryLine = new char32_t[bufferSize]; + copyString8to32(activeHistoryLine, bufferSize, ucharCount, + history[historyIndex]); + if (dp.searchTextLen > 0) { + bool found = false; + int historySearchIndex = historyIndex; + int lineLength = static_cast<int>(ucharCount); + int lineSearchPos = historyLinePosition; + if (searchAgain) { + lineSearchPos += dp.direction; + } + searchAgain = false; + while (true) { + while ((dp.direction > 0) ? (lineSearchPos < lineLength) + : (lineSearchPos >= 0)) { + if (strncmp32(dp.searchText.get(), + &activeHistoryLine[lineSearchPos], + dp.searchTextLen) == 0) { + found = true; + break; + } + lineSearchPos += dp.direction; + } + if (found) { + historyIndex = historySearchIndex; + historyLineLength = lineLength; + historyLinePosition = lineSearchPos; + break; + } else if ((dp.direction > 0) ? (historySearchIndex < historyLen - 1) + : (historySearchIndex > 0)) { + historySearchIndex += dp.direction; + bufferSize = strlen8(history[historySearchIndex]) + 1; + delete[] activeHistoryLine; + activeHistoryLine = nullptr; + activeHistoryLine = new char32_t[bufferSize]; + copyString8to32(activeHistoryLine, bufferSize, ucharCount, + history[historySearchIndex]); + lineLength = static_cast<int>(ucharCount); + lineSearchPos = + (dp.direction > 0) ? 0 : (lineLength - dp.searchTextLen); + } else { + beep(); + break; + } + }; // while + } + if (activeHistoryLine) { + delete[] activeHistoryLine; + activeHistoryLine = nullptr; + } + bufferSize = historyLineLength + 1; + activeHistoryLine = new char32_t[bufferSize]; + copyString8to32(activeHistoryLine, bufferSize, ucharCount, + history[historyIndex]); + dynamicRefresh(dp, activeHistoryLine, historyLineLength, + historyLinePosition); // draw user's text with our prompt + } + } // while + + // leaving history search, restore previous prompt, maybe make searched line + // current + PromptBase pb; + pb.promptChars = pi.promptIndentation; + pb.promptBytes = pi.promptBytes; + Utf32String tempUnicode(pb.promptBytes + 1); + + copyString32(tempUnicode.get(), &pi.promptText[pi.promptLastLinePosition], + pb.promptBytes - pi.promptLastLinePosition); + tempUnicode.initFromBuffer(); + pb.promptText = tempUnicode; + pb.promptExtraLines = 0; + pb.promptIndentation = pi.promptIndentation; + pb.promptLastLinePosition = 0; + pb.promptPreviousInputLen = historyLineLength; + pb.promptCursorRowOffset = dp.promptCursorRowOffset; + pb.promptScreenColumns = pi.promptScreenColumns; + pb.promptPreviousLen = dp.promptChars; + if (useSearchedLine && activeHistoryLine) { + historyRecallMostRecent = true; + copyString32(buf32, activeHistoryLine, buflen + 1); + len = historyLineLength; + pos = historyLinePosition; + } + if (activeHistoryLine) { + delete[] activeHistoryLine; + activeHistoryLine = nullptr; + } + dynamicRefresh(pb, buf32, len, + pos); // redraw the original prompt with current input + pi.promptPreviousInputLen = len; + pi.promptCursorRowOffset = pi.promptExtraLines + pb.promptCursorRowOffset; + previousSearchText = + dp.searchText; // save search text for possible reuse on ctrl-R ctrl-R + return c; // pass a character or -1 back to main loop +} + +static bool isCharacterAlphanumeric(char32_t testChar) { +#ifdef _WIN32 + return (iswalnum((wint_t)testChar) != 0 ? true : false); +#else + return (iswalnum(testChar) != 0 ? true : false); +#endif +} + +#ifndef _WIN32 +static bool gotResize = false; +#endif +static int keyType = 0; + +int InputBuffer::getInputLine(PromptBase& pi) { + keyType = 0; + + // The latest history entry is always our current buffer + if (len > 0) { + size_t bufferSize = sizeof(char32_t) * len + 1; + unique_ptr<char[]> tempBuffer(new char[bufferSize]); + copyString32to8(tempBuffer.get(), bufferSize, buf32); + linenoiseHistoryAdd(tempBuffer.get()); + } else { + linenoiseHistoryAdd(""); + } + historyIndex = historyLen - 1; + historyRecallMostRecent = false; + + // display the prompt + if (!pi.write()) return -1; + +#ifndef _WIN32 + // we have to generate our own newline on line wrap on Linux + if (pi.promptIndentation == 0 && pi.promptExtraLines > 0) + if (write(1, "\n", 1) == -1) return -1; +#endif + + // the cursor starts out at the end of the prompt + pi.promptCursorRowOffset = pi.promptExtraLines; + + // kill and yank start in "other" mode + killRing.lastAction = KillRing::actionOther; + + // when history search returns control to us, we execute its terminating + // keystroke + int terminatingKeystroke = -1; + + // if there is already text in the buffer, display it first + if (len > 0) { + refreshLine(pi); + } + + // loop collecting characters, respond to line editing characters + while (true) { + int c; + if (terminatingKeystroke == -1) { + c = linenoiseReadChar(); // get a new keystroke + + keyType = 0; + if (c != 0) { + // set flag that we got some input + if (c == ctrlChar('C')) { + keyType = 1; + } else if (c == ctrlChar('D')) { + keyType = 2; + } + } + +#ifndef _WIN32 + if (c == 0 && gotResize) { + // caught a window resize event + // now redraw the prompt and line + gotResize = false; + pi.promptScreenColumns = getScreenColumns(); + dynamicRefresh(pi, buf32, len, + pos); // redraw the original prompt with current input + continue; + } +#endif + } else { + c = terminatingKeystroke; // use the terminating keystroke from search + terminatingKeystroke = -1; // clear it once we've used it + } + + c = cleanupCtrl(c); // convert CTRL + <char> into normal ctrl + + if (c == 0) { + return len; + } + + if (c == -1) { + refreshLine(pi); + continue; + } + + if (c == -2) { + if (!pi.write()) return -1; + refreshLine(pi); + continue; + } + + // ctrl-I/tab, command completion, needs to be before switch statement + if (c == ctrlChar('I') && completionCallback) { + if (pos == 0) // SERVER-4967 -- in earlier versions, you could paste + // previous output + continue; // back into the shell ... this output may have leading + // tabs. + // This hack (i.e. what the old code did) prevents command completion + // on an empty line but lets users paste text with leading tabs. + + killRing.lastAction = KillRing::actionOther; + historyRecallMostRecent = false; + + // completeLine does the actual completion and replacement + c = completeLine(pi); + + if (c < 0) // return on error + return len; + + if (c == 0) // read next character when 0 + continue; + + // deliberate fall-through here, so we use the terminating character + } + + switch (c) { + case ctrlChar('A'): // ctrl-A, move cursor to start of line + case HOME_KEY: + killRing.lastAction = KillRing::actionOther; + pos = 0; + refreshLine(pi); + break; + + case ctrlChar('B'): // ctrl-B, move cursor left by one character + case LEFT_ARROW_KEY: + killRing.lastAction = KillRing::actionOther; + if (pos > 0) { + --pos; + refreshLine(pi); + } + break; + + case META + 'b': // meta-B, move cursor left by one word + case META + 'B': + case CTRL + LEFT_ARROW_KEY: + case META + LEFT_ARROW_KEY: // Emacs allows Meta, bash & readline don't + killRing.lastAction = KillRing::actionOther; + if (pos > 0) { + while (pos > 0 && !isCharacterAlphanumeric(buf32[pos - 1])) { + --pos; + } + while (pos > 0 && isCharacterAlphanumeric(buf32[pos - 1])) { + --pos; + } + refreshLine(pi); + } + break; + + case ctrlChar('C'): // ctrl-C, abort this line + killRing.lastAction = KillRing::actionOther; + historyRecallMostRecent = false; + errno = EAGAIN; + --historyLen; + free(history[historyLen]); + // we need one last refresh with the cursor at the end of the line + // so we don't display the next prompt over the previous input line + pos = len; // pass len as pos for EOL + refreshLine(pi); + if (write(1, "^C", 2) == -1) return -1; // Display the ^C we got + return -1; + + case META + 'c': // meta-C, give word initial Cap + case META + 'C': + killRing.lastAction = KillRing::actionOther; + historyRecallMostRecent = false; + if (pos < len) { + while (pos < len && !isCharacterAlphanumeric(buf32[pos])) { + ++pos; + } + if (pos < len && isCharacterAlphanumeric(buf32[pos])) { + if (buf32[pos] >= 'a' && buf32[pos] <= 'z') { + buf32[pos] += 'A' - 'a'; + } + ++pos; + } + while (pos < len && isCharacterAlphanumeric(buf32[pos])) { + if (buf32[pos] >= 'A' && buf32[pos] <= 'Z') { + buf32[pos] += 'a' - 'A'; + } + ++pos; + } + refreshLine(pi); + } + break; + + // ctrl-D, delete the character under the cursor + // on an empty line, exit the shell + case ctrlChar('D'): + killRing.lastAction = KillRing::actionOther; + if (len > 0 && pos < len) { + historyRecallMostRecent = false; + memmove(buf32 + pos, buf32 + pos + 1, sizeof(char32_t) * (len - pos)); + --len; + refreshLine(pi); + } else if (len == 0) { + --historyLen; + free(history[historyLen]); + return -1; + } + break; + + case META + 'd': // meta-D, kill word to right of cursor + case META + 'D': + if (pos < len) { + historyRecallMostRecent = false; + int endingPos = pos; + while (endingPos < len && + !isCharacterAlphanumeric(buf32[endingPos])) { + ++endingPos; + } + while (endingPos < len && isCharacterAlphanumeric(buf32[endingPos])) { + ++endingPos; + } + killRing.kill(&buf32[pos], endingPos - pos, true); + memmove(buf32 + pos, buf32 + endingPos, + sizeof(char32_t) * (len - endingPos + 1)); + len -= endingPos - pos; + refreshLine(pi); + } + killRing.lastAction = KillRing::actionKill; + break; + + case ctrlChar('E'): // ctrl-E, move cursor to end of line + case END_KEY: + killRing.lastAction = KillRing::actionOther; + pos = len; + refreshLine(pi); + break; + + case ctrlChar('F'): // ctrl-F, move cursor right by one character + case RIGHT_ARROW_KEY: + killRing.lastAction = KillRing::actionOther; + if (pos < len) { + ++pos; + refreshLine(pi); + } + break; + + case META + 'f': // meta-F, move cursor right by one word + case META + 'F': + case CTRL + RIGHT_ARROW_KEY: + case META + RIGHT_ARROW_KEY: // Emacs allows Meta, bash & readline don't + killRing.lastAction = KillRing::actionOther; + if (pos < len) { + while (pos < len && !isCharacterAlphanumeric(buf32[pos])) { + ++pos; + } + while (pos < len && isCharacterAlphanumeric(buf32[pos])) { + ++pos; + } + refreshLine(pi); + } + break; + + case ctrlChar('H'): // backspace/ctrl-H, delete char to left of cursor + killRing.lastAction = KillRing::actionOther; + if (pos > 0) { + historyRecallMostRecent = false; + memmove(buf32 + pos - 1, buf32 + pos, + sizeof(char32_t) * (1 + len - pos)); + --pos; + --len; + refreshLine(pi); + } + break; + + // meta-Backspace, kill word to left of cursor + case META + ctrlChar('H'): + if (pos > 0) { + historyRecallMostRecent = false; + int startingPos = pos; + while (pos > 0 && !isCharacterAlphanumeric(buf32[pos - 1])) { + --pos; + } + while (pos > 0 && isCharacterAlphanumeric(buf32[pos - 1])) { + --pos; + } + killRing.kill(&buf32[pos], startingPos - pos, false); + memmove(buf32 + pos, buf32 + startingPos, + sizeof(char32_t) * (len - startingPos + 1)); + len -= startingPos - pos; + refreshLine(pi); + } + killRing.lastAction = KillRing::actionKill; + break; + + case ctrlChar('J'): // ctrl-J/linefeed/newline, accept line + case ctrlChar('M'): // ctrl-M/return/enter + killRing.lastAction = KillRing::actionOther; + // we need one last refresh with the cursor at the end of the line + // so we don't display the next prompt over the previous input line + pos = len; // pass len as pos for EOL + refreshLine(pi); + historyPreviousIndex = historyRecallMostRecent ? historyIndex : -2; + --historyLen; + free(history[historyLen]); + return len; + + case ctrlChar('K'): // ctrl-K, kill from cursor to end of line + killRing.kill(&buf32[pos], len - pos, true); + buf32[pos] = '\0'; + len = pos; + refreshLine(pi); + killRing.lastAction = KillRing::actionKill; + historyRecallMostRecent = false; + break; + + case ctrlChar('L'): // ctrl-L, clear screen and redisplay line + clearScreen(pi); + break; + + case META + 'l': // meta-L, lowercase word + case META + 'L': + killRing.lastAction = KillRing::actionOther; + if (pos < len) { + historyRecallMostRecent = false; + while (pos < len && !isCharacterAlphanumeric(buf32[pos])) { + ++pos; + } + while (pos < len && isCharacterAlphanumeric(buf32[pos])) { + if (buf32[pos] >= 'A' && buf32[pos] <= 'Z') { + buf32[pos] += 'a' - 'A'; + } + ++pos; + } + refreshLine(pi); + } + break; + + case ctrlChar('N'): // ctrl-N, recall next line in history + case ctrlChar('P'): // ctrl-P, recall previous line in history + case DOWN_ARROW_KEY: + case UP_ARROW_KEY: + killRing.lastAction = KillRing::actionOther; + // if not already recalling, add the current line to the history list so + // we don't + // have to special case it + if (historyIndex == historyLen - 1) { + free(history[historyLen - 1]); + size_t tempBufferSize = sizeof(char32_t) * len + 1; + unique_ptr<char[]> tempBuffer(new char[tempBufferSize]); + copyString32to8(tempBuffer.get(), tempBufferSize, buf32); + history[historyLen - 1] = strdup8(tempBuffer.get()); + } + if (historyLen > 1) { + if (c == UP_ARROW_KEY) { + c = ctrlChar('P'); + } + if (historyPreviousIndex != -2 && c != ctrlChar('P')) { + historyIndex = + 1 + historyPreviousIndex; // emulate Windows down-arrow + } else { + historyIndex += (c == ctrlChar('P')) ? -1 : 1; + } + historyPreviousIndex = -2; + if (historyIndex < 0) { + historyIndex = 0; + break; + } else if (historyIndex >= historyLen) { + historyIndex = historyLen - 1; + break; + } + historyRecallMostRecent = true; + size_t ucharCount = 0; + copyString8to32(buf32, buflen, ucharCount, history[historyIndex]); + len = pos = static_cast<int>(ucharCount); + refreshLine(pi); + } + break; + + case ctrlChar('R'): // ctrl-R, reverse history search + case ctrlChar('S'): // ctrl-S, forward history search + terminatingKeystroke = incrementalHistorySearch(pi, c); + break; + + case ctrlChar('T'): // ctrl-T, transpose characters + killRing.lastAction = KillRing::actionOther; + if (pos > 0 && len > 1) { + historyRecallMostRecent = false; + size_t leftCharPos = (pos == len) ? pos - 2 : pos - 1; + char32_t aux = buf32[leftCharPos]; + buf32[leftCharPos] = buf32[leftCharPos + 1]; + buf32[leftCharPos + 1] = aux; + if (pos != len) ++pos; + refreshLine(pi); + } + break; + + case ctrlChar( + 'U'): // ctrl-U, kill all characters to the left of the cursor + if (pos > 0) { + historyRecallMostRecent = false; + killRing.kill(&buf32[0], pos, false); + len -= pos; + memmove(buf32, buf32 + pos, sizeof(char32_t) * (len + 1)); + pos = 0; + refreshLine(pi); + } + killRing.lastAction = KillRing::actionKill; + break; + + case META + 'u': // meta-U, uppercase word + case META + 'U': + killRing.lastAction = KillRing::actionOther; + if (pos < len) { + historyRecallMostRecent = false; + while (pos < len && !isCharacterAlphanumeric(buf32[pos])) { + ++pos; + } + while (pos < len && isCharacterAlphanumeric(buf32[pos])) { + if (buf32[pos] >= 'a' && buf32[pos] <= 'z') { + buf32[pos] += 'A' - 'a'; + } + ++pos; + } + refreshLine(pi); + } + break; + + // ctrl-W, kill to whitespace (not word) to left of cursor + case ctrlChar('W'): + if (pos > 0) { + historyRecallMostRecent = false; + int startingPos = pos; + while (pos > 0 && buf32[pos - 1] == ' ') { + --pos; + } + while (pos > 0 && buf32[pos - 1] != ' ') { + --pos; + } + killRing.kill(&buf32[pos], startingPos - pos, false); + memmove(buf32 + pos, buf32 + startingPos, + sizeof(char32_t) * (len - startingPos + 1)); + len -= startingPos - pos; + refreshLine(pi); + } + killRing.lastAction = KillRing::actionKill; + break; + + case ctrlChar('Y'): // ctrl-Y, yank killed text + historyRecallMostRecent = false; + { + Utf32String* restoredText = killRing.yank(); + if (restoredText) { + bool truncated = false; + size_t ucharCount = restoredText->length(); + if (ucharCount > static_cast<size_t>(buflen - len)) { + ucharCount = buflen - len; + truncated = true; + } + memmove(buf32 + pos + ucharCount, buf32 + pos, + sizeof(char32_t) * (len - pos + 1)); + memmove(buf32 + pos, restoredText->get(), + sizeof(char32_t) * ucharCount); + pos += static_cast<int>(ucharCount); + len += static_cast<int>(ucharCount); + refreshLine(pi); + killRing.lastAction = KillRing::actionYank; + killRing.lastYankSize = ucharCount; + if (truncated) { + beep(); + } + } else { + beep(); + } + } + break; + + case META + 'y': // meta-Y, "yank-pop", rotate popped text + case META + 'Y': + if (killRing.lastAction == KillRing::actionYank) { + historyRecallMostRecent = false; + Utf32String* restoredText = killRing.yankPop(); + if (restoredText) { + bool truncated = false; + size_t ucharCount = restoredText->length(); + if (ucharCount > + static_cast<size_t>(killRing.lastYankSize + buflen - len)) { + ucharCount = killRing.lastYankSize + buflen - len; + truncated = true; + } + if (ucharCount > killRing.lastYankSize) { + memmove(buf32 + pos + ucharCount - killRing.lastYankSize, + buf32 + pos, sizeof(char32_t) * (len - pos + 1)); + memmove(buf32 + pos - killRing.lastYankSize, restoredText->get(), + sizeof(char32_t) * ucharCount); + } else { + memmove(buf32 + pos - killRing.lastYankSize, restoredText->get(), + sizeof(char32_t) * ucharCount); + memmove(buf32 + pos + ucharCount - killRing.lastYankSize, + buf32 + pos, sizeof(char32_t) * (len - pos + 1)); + } + pos += static_cast<int>(ucharCount - killRing.lastYankSize); + len += static_cast<int>(ucharCount - killRing.lastYankSize); + killRing.lastYankSize = ucharCount; + refreshLine(pi); + if (truncated) { + beep(); + } + break; + } + } + beep(); + break; + +#ifndef _WIN32 + case ctrlChar('Z'): // ctrl-Z, job control + disableRawMode(); // Returning to Linux (whatever) shell, leave raw + // mode + raise(SIGSTOP); // Break out in mid-line + enableRawMode(); // Back from Linux shell, re-enter raw mode + if (!pi.write()) break; // Redraw prompt + refreshLine(pi); // Refresh the line + break; +#endif + + // DEL, delete the character under the cursor + case 127: + case DELETE_KEY: + killRing.lastAction = KillRing::actionOther; + if (len > 0 && pos < len) { + historyRecallMostRecent = false; + memmove(buf32 + pos, buf32 + pos + 1, sizeof(char32_t) * (len - pos)); + --len; + refreshLine(pi); + } + break; + + case META + '<': // meta-<, beginning of history + case PAGE_UP_KEY: // Page Up, beginning of history + case META + '>': // meta->, end of history + case PAGE_DOWN_KEY: // Page Down, end of history + killRing.lastAction = KillRing::actionOther; + // if not already recalling, add the current line to the history list so + // we don't + // have to special case it + if (historyIndex == historyLen - 1) { + free(history[historyLen - 1]); + size_t tempBufferSize = sizeof(char32_t) * len + 1; + unique_ptr<char[]> tempBuffer(new char[tempBufferSize]); + copyString32to8(tempBuffer.get(), tempBufferSize, buf32); + history[historyLen - 1] = strdup8(tempBuffer.get()); + } + if (historyLen > 1) { + historyIndex = + (c == META + '<' || c == PAGE_UP_KEY) ? 0 : historyLen - 1; + historyPreviousIndex = -2; + historyRecallMostRecent = true; + size_t ucharCount = 0; + copyString8to32(buf32, buflen, ucharCount, history[historyIndex]); + len = pos = static_cast<int>(ucharCount); + refreshLine(pi); + } + break; + + // not one of our special characters, maybe insert it in the buffer + default: + killRing.lastAction = KillRing::actionOther; + historyRecallMostRecent = false; + if (c & (META | CTRL)) { // beep on unknown Ctrl and/or Meta keys + beep(); + break; + } + if (len < buflen) { + if (isControlChar(c)) { // don't insert control characters + beep(); + break; + } + if (len == pos) { // at end of buffer + buf32[pos] = c; + ++pos; + ++len; + buf32[len] = '\0'; + int inputLen = calculateColumnPosition(buf32, len); + if (pi.promptIndentation + inputLen < pi.promptScreenColumns) { + if (inputLen > pi.promptPreviousInputLen) + pi.promptPreviousInputLen = inputLen; + /* Avoid a full update of the line in the + * trivial case. */ + if (write32(1, reinterpret_cast<char32_t*>(&c), 1) == -1) + return -1; + } else { + refreshLine(pi); + } + } else { // not at end of buffer, have to move characters to our + // right + memmove(buf32 + pos + 1, buf32 + pos, + sizeof(char32_t) * (len - pos)); + buf32[pos] = c; + ++len; + ++pos; + buf32[len] = '\0'; + refreshLine(pi); + } + } else { + beep(); // buffer is full, beep on new characters + } + break; + } + } + return len; +} + +static string preloadedBufferContents; // used with linenoisePreloadBuffer +static string preloadErrorMessage; + +/** + * linenoisePreloadBuffer provides text to be inserted into the command buffer + * + * the provided text will be processed to be usable and will be used to preload + * the input buffer on the next call to linenoise() + * + * @param preloadText text to begin with on the next call to linenoise() + */ +void linenoisePreloadBuffer(const char* preloadText) { + if (!preloadText) { + return; + } + int bufferSize = static_cast<int>(strlen(preloadText) + 1); + unique_ptr<char[]> tempBuffer(new char[bufferSize]); + strncpy(&tempBuffer[0], preloadText, bufferSize); + + // remove characters that won't display correctly + char* pIn = &tempBuffer[0]; + char* pOut = pIn; + bool controlsStripped = false; + bool whitespaceSeen = false; + while (*pIn) { + unsigned char c = + *pIn++; // we need unsigned so chars 0x80 and above are allowed + if ('\r' == c) { // silently skip CR + continue; + } + if ('\n' == c || '\t' == c) { // note newline or tab + whitespaceSeen = true; + continue; + } + if (isControlChar( + c)) { // remove other control characters, flag for message + controlsStripped = true; + *pOut++ = ' '; + continue; + } + if (whitespaceSeen) { // convert whitespace to a single space + *pOut++ = ' '; + whitespaceSeen = false; + } + *pOut++ = c; + } + *pOut = 0; + int processedLength = static_cast<int>(pOut - tempBuffer.get()); + bool lineTruncated = false; + if (processedLength > (LINENOISE_MAX_LINE - 1)) { + lineTruncated = true; + tempBuffer[LINENOISE_MAX_LINE - 1] = 0; + } + preloadedBufferContents = tempBuffer.get(); + if (controlsStripped) { + preloadErrorMessage += + " [Edited line: control characters were converted to spaces]\n"; + } + if (lineTruncated) { + preloadErrorMessage += " [Edited line: the line length was reduced from "; + char buf[128]; + snprintf(buf, sizeof(buf), "%d to %d]\n", processedLength, + (LINENOISE_MAX_LINE - 1)); + preloadErrorMessage += buf; + } +} + +/** + * linenoise is a readline replacement. + * + * call it with a prompt to display and it will return a line of input from the + * user + * + * @param prompt text of prompt to display to the user + * @return the returned string belongs to the caller on return and must be + * freed to prevent + * memory leaks + */ +char* linenoise(const char* prompt) { +#ifndef _WIN32 + gotResize = false; +#endif + if (isatty(STDIN_FILENO)) { // input is from a terminal + char32_t buf32[LINENOISE_MAX_LINE]; + char charWidths[LINENOISE_MAX_LINE]; + if (!preloadErrorMessage.empty()) { + printf("%s", preloadErrorMessage.c_str()); + fflush(stdout); + preloadErrorMessage.clear(); + } + PromptInfo pi(prompt, getScreenColumns()); + if (isUnsupportedTerm()) { + if (!pi.write()) return 0; + fflush(stdout); + if (preloadedBufferContents.empty()) { + unique_ptr<char[]> buf8(new char[LINENOISE_MAX_LINE]); + if (fgets(buf8.get(), LINENOISE_MAX_LINE, stdin) == NULL) { + return NULL; + } + size_t len = strlen(buf8.get()); + while (len && (buf8[len - 1] == '\n' || buf8[len - 1] == '\r')) { + --len; + buf8[len] = '\0'; + } + return strdup(buf8.get()); // caller must free buffer + } else { + char* buf8 = strdup(preloadedBufferContents.c_str()); + preloadedBufferContents.clear(); + return buf8; // caller must free buffer + } + } else { + if (enableRawMode() == -1) { + return NULL; + } + InputBuffer ib(buf32, charWidths, LINENOISE_MAX_LINE); + if (!preloadedBufferContents.empty()) { + ib.preloadBuffer(preloadedBufferContents.c_str()); + preloadedBufferContents.clear(); + } + int count = ib.getInputLine(pi); + disableRawMode(); + printf("\n"); + if (count == -1) { + return NULL; + } + size_t bufferSize = sizeof(char32_t) * ib.length() + 1; + unique_ptr<char[]> buf8(new char[bufferSize]); + copyString32to8(buf8.get(), bufferSize, buf32); + return strdup(buf8.get()); // caller must free buffer + } + } else { // input not from a terminal, we should work with piped input, i.e. + // redirected stdin + unique_ptr<char[]> buf8(new char[LINENOISE_MAX_LINE]); + if (fgets(buf8.get(), LINENOISE_MAX_LINE, stdin) == NULL) { + return NULL; + } + + // if fgets() gave us the newline, remove it + int count = static_cast<int>(strlen(buf8.get())); + if (count > 0 && buf8[count - 1] == '\n') { + --count; + buf8[count] = '\0'; + } + return strdup(buf8.get()); // caller must free buffer + } +} + +/* Register a callback function to be called for tab-completion. */ +void linenoiseSetCompletionCallback(linenoiseCompletionCallback* fn) { + completionCallback = fn; +} + +void linenoiseAddCompletion(linenoiseCompletions* lc, const char* str) { + lc->completionStrings.push_back(Utf32String(str)); +} + +int linenoiseHistoryAdd(const char* line) { + if (historyMaxLen == 0) { + return 0; + } + if (history == NULL) { + history = + reinterpret_cast<char8_t**>(malloc(sizeof(char8_t*) * historyMaxLen)); + if (history == NULL) { + return 0; + } + memset(history, 0, (sizeof(char*) * historyMaxLen)); + } + char8_t* linecopy = strdup8(line); + if (!linecopy) { + return 0; + } + + // convert newlines in multi-line code to spaces before storing + char8_t* p = linecopy; + while (*p) { + if (*p == '\n') { + *p = ' '; + } + ++p; + } + + // prevent duplicate history entries + if (historyLen > 0 && history[historyLen - 1] != nullptr && + strcmp(reinterpret_cast<char const*>(history[historyLen - 1]), + reinterpret_cast<char const*>(linecopy)) == 0) { + free(linecopy); + return 0; + } + + if (historyLen == historyMaxLen) { + free(history[0]); + memmove(history, history + 1, sizeof(char*) * (historyMaxLen - 1)); + --historyLen; + if (--historyPreviousIndex < -1) { + historyPreviousIndex = -2; + } + } + + history[historyLen] = linecopy; + ++historyLen; + return 1; +} + +int linenoiseHistorySetMaxLen(int len) { + if (len < 1) { + return 0; + } + if (history) { + int tocopy = historyLen; + char8_t** newHistory = + reinterpret_cast<char8_t**>(malloc(sizeof(char8_t*) * len)); + if (newHistory == NULL) { + return 0; + } + if (len < tocopy) { + tocopy = len; + } + memcpy(newHistory, history + historyMaxLen - tocopy, + sizeof(char8_t*) * tocopy); + free(history); + history = newHistory; + } + historyMaxLen = len; + if (historyLen > historyMaxLen) { + historyLen = historyMaxLen; + } + return 1; +} + +/* Fetch a line of the history by (zero-based) index. If the requested + * line does not exist, NULL is returned. The return value is a heap-allocated + * copy of the line, and the caller is responsible for de-allocating it. */ +char* linenoiseHistoryLine(int index) { + if (index < 0 || index >= historyLen) return NULL; + + return strdup(reinterpret_cast<char const*>(history[index])); +} + +/* Save the history in the specified file. On success 0 is returned + * otherwise -1 is returned. */ +int linenoiseHistorySave(const char* filename) { +#if _WIN32 + FILE* fp = fopen(filename, "wt"); +#else + int fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR | S_IWUSR); + + if (fd < 0) { + return -1; + } + + FILE* fp = fdopen(fd, "wt"); +#endif + + if (fp == NULL) { + return -1; + } + + for (int j = 0; j < historyLen; ++j) { + if (history[j][0] != '\0') { + fprintf(fp, "%s\n", history[j]); + } + } + + fclose(fp); + + return 0; +} + +/* Load the history from the specified file. If the file does not exist + * zero is returned and no operation is performed. + * + * If the file exists and the operation succeeded 0 is returned, otherwise + * on error -1 is returned. */ +int linenoiseHistoryLoad(const char* filename) { + FILE* fp = fopen(filename, "rt"); + if (fp == NULL) { + return -1; + } + + char buf[LINENOISE_MAX_LINE]; + while (fgets(buf, LINENOISE_MAX_LINE, fp) != NULL) { + char* p = strchr(buf, '\r'); + if (!p) { + p = strchr(buf, '\n'); + } + if (p) { + *p = '\0'; + } + if (p != buf) { + linenoiseHistoryAdd(buf); + } + } + fclose(fp); + return 0; +} + +/* Set if to use or not the multi line mode. */ +/* note that this is a stub only, as linenoise-ng always multi-line */ +void linenoiseSetMultiLine(int) {} + +/* This special mode is used by linenoise in order to print scan codes + * on screen for debugging / development purposes. It is implemented + * by the linenoise_example program using the --keycodes option. */ +void linenoisePrintKeyCodes(void) { + char quit[4]; + + printf( + "Linenoise key codes debugging mode.\n" + "Press keys to see scan codes. Type 'quit' at any time to exit.\n"); + if (enableRawMode() == -1) return; + memset(quit, ' ', 4); + while (1) { + char c; + int nread; + +#if _WIN32 + nread = _read(STDIN_FILENO, &c, 1); +#else + nread = read(STDIN_FILENO, &c, 1); +#endif + if (nread <= 0) continue; + memmove(quit, quit + 1, sizeof(quit) - 1); /* shift string to left. */ + quit[sizeof(quit) - 1] = c; /* Insert current char on the right. */ + if (memcmp(quit, "quit", sizeof(quit)) == 0) break; + + printf("'%c' %02x (%d) (type quit to exit)\n", isprint(c) ? c : '?', (int)c, + (int)c); + printf("\r"); /* Go left edge manually, we are in raw mode. */ + fflush(stdout); + } + disableRawMode(); +} + +#ifndef _WIN32 +static void WindowSizeChanged(int) { + // do nothing here but setting this flag + gotResize = true; +} +#endif + +int linenoiseInstallWindowChangeHandler(void) { +#ifndef _WIN32 + struct sigaction sa; + sigemptyset(&sa.sa_mask); + sa.sa_flags = 0; + sa.sa_handler = &WindowSizeChanged; + + if (sigaction(SIGWINCH, &sa, nullptr) == -1) { + return errno; + } +#endif + return 0; +} + +int linenoiseKeyType(void) { + return keyType; +} diff --git a/src/linenoise/linenoise.h b/src/linenoise/linenoise.h index ed20232c576e..3a8eb9f7ee63 100644 --- a/src/linenoise/linenoise.h +++ b/src/linenoise/linenoise.h @@ -1,70 +1,70 @@ -/* linenoise.h -- VERSION 1.0 - * - * Guerrilla line editing library against the idea that a line editing lib - * needs to be 20,000 lines of C code. +/* linenoise.h -- guerrilla line editing library against the idea that a + * line editing lib needs to be 20,000 lines of C code. * * See linenoise.c for more information. * - * ------------------------------------------------------------------------ - * - * Copyright (c) 2010-2014, Salvatore Sanfilippo <antirez at gmail dot com> - * Copyright (c) 2010-2013, Pieter Noordhuis <pcnoordhuis at gmail dot com> + * Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com> + * Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com> * * All rights reserved. * * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: + * modification, are permitted provided that the following conditions are met: * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * * Redistributions in binary form must reproduce the above copyright + * * Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. + * * Neither the name of Redis nor the names of its contributors may be used + * to endorse or promote products derived from this software without + * specific prior written permission. * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. */ #ifndef __LINENOISE_H #define __LINENOISE_H +#define LINENOISE_VERSION "1.0.0" +#define LINENOISE_VERSION_MAJOR 1 +#define LINENOISE_VERSION_MINOR 1 + #ifdef __cplusplus extern "C" { #endif -typedef struct linenoiseCompletions { - size_t len; - char **cvec; -} linenoiseCompletions; +typedef struct linenoiseCompletions linenoiseCompletions; -typedef void(linenoiseCompletionCallback)(const char *, linenoiseCompletions *); -typedef char*(linenoiseHintsCallback)(const char *, int *color, int *bold); -typedef void(linenoiseFreeHintsCallback)(void *); -void linenoiseSetCompletionCallback(linenoiseCompletionCallback *); -void linenoiseSetHintsCallback(linenoiseHintsCallback *); -void linenoiseSetFreeHintsCallback(linenoiseFreeHintsCallback *); -void linenoiseAddCompletion(linenoiseCompletions *, const char *); +typedef void(linenoiseCompletionCallback)(const char*, linenoiseCompletions*); +void linenoiseSetCompletionCallback(linenoiseCompletionCallback* fn); +void linenoiseAddCompletion(linenoiseCompletions* lc, const char* str); -char *linenoise(const char *prompt); -void linenoiseFree(void *ptr); -int linenoiseHistoryAdd(const char *line); +char* linenoise(const char* prompt); +void linenoisePreloadBuffer(const char* preloadText); +int linenoiseHistoryAdd(const char* line); int linenoiseHistorySetMaxLen(int len); -int linenoiseHistorySave(const char *filename); -int linenoiseHistoryLoad(const char *filename); +char* linenoiseHistoryLine(int index); +int linenoiseHistorySave(const char* filename); +int linenoiseHistoryLoad(const char* filename); +void linenoiseHistoryFree(void); void linenoiseClearScreen(void); void linenoiseSetMultiLine(int ml); void linenoisePrintKeyCodes(void); +/* the following are extensions to the original linenoise API */ +int linenoiseInstallWindowChangeHandler(void); +/* returns type of key pressed: 1 = CTRL-C, 2 = CTRL-D, 0 = other */ +int linenoiseKeyType(void); #ifdef __cplusplus } diff --git a/src/linenoise/wcwidth.cpp b/src/linenoise/wcwidth.cpp new file mode 100644 index 000000000000..deec0ba6b57f --- /dev/null +++ b/src/linenoise/wcwidth.cpp @@ -0,0 +1,315 @@ +/* + * This is an implementation of wcwidth() and wcswidth() (defined in + * IEEE Std 1002.1-2001) for Unicode. + * + * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html + * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html + * + * In fixed-width output devices, Latin characters all occupy a single + * "cell" position of equal width, whereas ideographic CJK characters + * occupy two such cells. Interoperability between terminal-line + * applications and (teletype-style) character terminals using the + * UTF-8 encoding requires agreement on which character should advance + * the cursor by how many cell positions. No established formal + * standards exist at present on which Unicode character shall occupy + * how many cell positions on character terminals. These routines are + * a first attempt of defining such behavior based on simple rules + * applied to data provided by the Unicode Consortium. + * + * For some graphical characters, the Unicode standard explicitly + * defines a character-cell width via the definition of the East Asian + * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes. + * In all these cases, there is no ambiguity about which width a + * terminal shall use. For characters in the East Asian Ambiguous (A) + * class, the width choice depends purely on a preference of backward + * compatibility with either historic CJK or Western practice. + * Choosing single-width for these characters is easy to justify as + * the appropriate long-term solution, as the CJK practice of + * displaying these characters as double-width comes from historic + * implementation simplicity (8-bit encoded characters were displayed + * single-width and 16-bit ones double-width, even for Greek, + * Cyrillic, etc.) and not any typographic considerations. + * + * Much less clear is the choice of width for the Not East Asian + * (Neutral) class. Existing practice does not dictate a width for any + * of these characters. It would nevertheless make sense + * typographically to allocate two character cells to characters such + * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be + * represented adequately with a single-width glyph. The following + * routines at present merely assign a single-cell width to all + * neutral characters, in the interest of simplicity. This is not + * entirely satisfactory and should be reconsidered before + * establishing a formal standard in this area. At the moment, the + * decision which Not East Asian (Neutral) characters should be + * represented by double-width glyphs cannot yet be answered by + * applying a simple rule from the Unicode database content. Setting + * up a proper standard for the behavior of UTF-8 character terminals + * will require a careful analysis not only of each Unicode character, + * but also of each presentation form, something the author of these + * routines has avoided to do so far. + * + * http://www.unicode.org/unicode/reports/tr11/ + * + * Markus Kuhn -- 2007-05-26 (Unicode 5.0) + * + * Permission to use, copy, modify, and distribute this software + * for any purpose and without fee is hereby granted. The author + * disclaims all warranties with regard to this software. + * + * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c + */ + +#include <wchar.h> +#include <string> +#include <memory> + +namespace linenoise_ng { + +struct interval { + char32_t first; + char32_t last; +}; + +/* auxiliary function for binary search in interval table */ +static int bisearch(char32_t ucs, const struct interval *table, int max) { + int min = 0; + int mid; + + if (ucs < table[0].first || ucs > table[max].last) + return 0; + while (max >= min) { + mid = (min + max) / 2; + if (ucs > table[mid].last) + min = mid + 1; + else if (ucs < table[mid].first) + max = mid - 1; + else + return 1; + } + + return 0; +} + + +/* The following two functions define the column width of an ISO 10646 + * character as follows: + * + * - The null character (U+0000) has a column width of 0. + * + * - Other C0/C1 control characters and DEL will lead to a return + * value of -1. + * + * - Non-spacing and enclosing combining characters (general + * category code Mn or Me in the Unicode database) have a + * column width of 0. + * + * - SOFT HYPHEN (U+00AD) has a column width of 1. + * + * - Other format characters (general category code Cf in the Unicode + * database) and ZERO WIDTH SPACE (U+200B) have a column width of 0. + * + * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) + * have a column width of 0. + * + * - Spacing characters in the East Asian Wide (W) or East Asian + * Full-width (F) category as defined in Unicode Technical + * Report #11 have a column width of 2. + * + * - All remaining characters (including all printable + * ISO 8859-1 and WGL4 characters, Unicode control characters, + * etc.) have a column width of 1. + * + * This implementation assumes that wchar_t characters are encoded + * in ISO 10646. + */ + +int mk_wcwidth(char32_t ucs) +{ + /* sorted list of non-overlapping intervals of non-spacing characters */ + /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */ + static const struct interval combining[] = { + { 0x0300, 0x036F }, { 0x0483, 0x0486 }, { 0x0488, 0x0489 }, + { 0x0591, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 }, + { 0x05C4, 0x05C5 }, { 0x05C7, 0x05C7 }, { 0x0600, 0x0603 }, + { 0x0610, 0x0615 }, { 0x064B, 0x065E }, { 0x0670, 0x0670 }, + { 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED }, + { 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A }, + { 0x07A6, 0x07B0 }, { 0x07EB, 0x07F3 }, { 0x0901, 0x0902 }, + { 0x093C, 0x093C }, { 0x0941, 0x0948 }, { 0x094D, 0x094D }, + { 0x0951, 0x0954 }, { 0x0962, 0x0963 }, { 0x0981, 0x0981 }, + { 0x09BC, 0x09BC }, { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD }, + { 0x09E2, 0x09E3 }, { 0x0A01, 0x0A02 }, { 0x0A3C, 0x0A3C }, + { 0x0A41, 0x0A42 }, { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D }, + { 0x0A70, 0x0A71 }, { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC }, + { 0x0AC1, 0x0AC5 }, { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD }, + { 0x0AE2, 0x0AE3 }, { 0x0B01, 0x0B01 }, { 0x0B3C, 0x0B3C }, + { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, { 0x0B4D, 0x0B4D }, + { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, { 0x0BC0, 0x0BC0 }, + { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, { 0x0C46, 0x0C48 }, + { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, { 0x0CBC, 0x0CBC }, + { 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD }, + { 0x0CE2, 0x0CE3 }, { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D }, + { 0x0DCA, 0x0DCA }, { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 }, + { 0x0E31, 0x0E31 }, { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E }, + { 0x0EB1, 0x0EB1 }, { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC }, + { 0x0EC8, 0x0ECD }, { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 }, + { 0x0F37, 0x0F37 }, { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E }, + { 0x0F80, 0x0F84 }, { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 }, + { 0x0F99, 0x0FBC }, { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 }, + { 0x1032, 0x1032 }, { 0x1036, 0x1037 }, { 0x1039, 0x1039 }, + { 0x1058, 0x1059 }, { 0x1160, 0x11FF }, { 0x135F, 0x135F }, + { 0x1712, 0x1714 }, { 0x1732, 0x1734 }, { 0x1752, 0x1753 }, + { 0x1772, 0x1773 }, { 0x17B4, 0x17B5 }, { 0x17B7, 0x17BD }, + { 0x17C6, 0x17C6 }, { 0x17C9, 0x17D3 }, { 0x17DD, 0x17DD }, + { 0x180B, 0x180D }, { 0x18A9, 0x18A9 }, { 0x1920, 0x1922 }, + { 0x1927, 0x1928 }, { 0x1932, 0x1932 }, { 0x1939, 0x193B }, + { 0x1A17, 0x1A18 }, { 0x1B00, 0x1B03 }, { 0x1B34, 0x1B34 }, + { 0x1B36, 0x1B3A }, { 0x1B3C, 0x1B3C }, { 0x1B42, 0x1B42 }, + { 0x1B6B, 0x1B73 }, { 0x1DC0, 0x1DCA }, { 0x1DFE, 0x1DFF }, + { 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x2060, 0x2063 }, + { 0x206A, 0x206F }, { 0x20D0, 0x20EF }, { 0x302A, 0x302F }, + { 0x3099, 0x309A }, { 0xA806, 0xA806 }, { 0xA80B, 0xA80B }, + { 0xA825, 0xA826 }, { 0xFB1E, 0xFB1E }, { 0xFE00, 0xFE0F }, + { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, { 0xFFF9, 0xFFFB }, + { 0x10A01, 0x10A03 }, { 0x10A05, 0x10A06 }, { 0x10A0C, 0x10A0F }, + { 0x10A38, 0x10A3A }, { 0x10A3F, 0x10A3F }, { 0x1D167, 0x1D169 }, + { 0x1D173, 0x1D182 }, { 0x1D185, 0x1D18B }, { 0x1D1AA, 0x1D1AD }, + { 0x1D242, 0x1D244 }, { 0xE0001, 0xE0001 }, { 0xE0020, 0xE007F }, + { 0xE0100, 0xE01EF } + }; + + /* test for 8-bit control characters */ + if (ucs == 0) + return 0; + if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0)) + return -1; + + /* binary search in table of non-spacing characters */ + if (bisearch(ucs, combining, + sizeof(combining) / sizeof(struct interval) - 1)) + return 0; + + /* if we arrive here, ucs is not a combining or C0/C1 control character */ + + return 1 + + (ucs >= 0x1100 && + (ucs <= 0x115f || /* Hangul Jamo init. consonants */ + ucs == 0x2329 || ucs == 0x232a || + (ucs >= 0x2e80 && ucs <= 0xa4cf && + ucs != 0x303f) || /* CJK ... Yi */ + (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */ + (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */ + (ucs >= 0xfe10 && ucs <= 0xfe19) || /* Vertical forms */ + (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */ + (ucs >= 0xff00 && ucs <= 0xff60) || /* Fullwidth Forms */ + (ucs >= 0xffe0 && ucs <= 0xffe6) || + (ucs >= 0x20000 && ucs <= 0x2fffd) || + (ucs >= 0x30000 && ucs <= 0x3fffd))); +} + + +int mk_wcswidth(const char32_t* pwcs, size_t n) +{ + int w, width = 0; + + for (;*pwcs && n-- > 0; pwcs++) + if ((w = mk_wcwidth(*pwcs)) < 0) + return -1; + else + width += w; + + return width; +} + + +/* + * The following functions are the same as mk_wcwidth() and + * mk_wcswidth(), except that spacing characters in the East Asian + * Ambiguous (A) category as defined in Unicode Technical Report #11 + * have a column width of 2. This variant might be useful for users of + * CJK legacy encodings who want to migrate to UCS without changing + * the traditional terminal character-width behaviour. It is not + * otherwise recommended for general use. + */ +int mk_wcwidth_cjk(wchar_t ucs) +{ + /* sorted list of non-overlapping intervals of East Asian Ambiguous + * characters, generated by "uniset +WIDTH-A -cat=Me -cat=Mn -cat=Cf c" */ + static const struct interval ambiguous[] = { + { 0x00A1, 0x00A1 }, { 0x00A4, 0x00A4 }, { 0x00A7, 0x00A8 }, + { 0x00AA, 0x00AA }, { 0x00AE, 0x00AE }, { 0x00B0, 0x00B4 }, + { 0x00B6, 0x00BA }, { 0x00BC, 0x00BF }, { 0x00C6, 0x00C6 }, + { 0x00D0, 0x00D0 }, { 0x00D7, 0x00D8 }, { 0x00DE, 0x00E1 }, + { 0x00E6, 0x00E6 }, { 0x00E8, 0x00EA }, { 0x00EC, 0x00ED }, + { 0x00F0, 0x00F0 }, { 0x00F2, 0x00F3 }, { 0x00F7, 0x00FA }, + { 0x00FC, 0x00FC }, { 0x00FE, 0x00FE }, { 0x0101, 0x0101 }, + { 0x0111, 0x0111 }, { 0x0113, 0x0113 }, { 0x011B, 0x011B }, + { 0x0126, 0x0127 }, { 0x012B, 0x012B }, { 0x0131, 0x0133 }, + { 0x0138, 0x0138 }, { 0x013F, 0x0142 }, { 0x0144, 0x0144 }, + { 0x0148, 0x014B }, { 0x014D, 0x014D }, { 0x0152, 0x0153 }, + { 0x0166, 0x0167 }, { 0x016B, 0x016B }, { 0x01CE, 0x01CE }, + { 0x01D0, 0x01D0 }, { 0x01D2, 0x01D2 }, { 0x01D4, 0x01D4 }, + { 0x01D6, 0x01D6 }, { 0x01D8, 0x01D8 }, { 0x01DA, 0x01DA }, + { 0x01DC, 0x01DC }, { 0x0251, 0x0251 }, { 0x0261, 0x0261 }, + { 0x02C4, 0x02C4 }, { 0x02C7, 0x02C7 }, { 0x02C9, 0x02CB }, + { 0x02CD, 0x02CD }, { 0x02D0, 0x02D0 }, { 0x02D8, 0x02DB }, + { 0x02DD, 0x02DD }, { 0x02DF, 0x02DF }, { 0x0391, 0x03A1 }, + { 0x03A3, 0x03A9 }, { 0x03B1, 0x03C1 }, { 0x03C3, 0x03C9 }, + { 0x0401, 0x0401 }, { 0x0410, 0x044F }, { 0x0451, 0x0451 }, + { 0x2010, 0x2010 }, { 0x2013, 0x2016 }, { 0x2018, 0x2019 }, + { 0x201C, 0x201D }, { 0x2020, 0x2022 }, { 0x2024, 0x2027 }, + { 0x2030, 0x2030 }, { 0x2032, 0x2033 }, { 0x2035, 0x2035 }, + { 0x203B, 0x203B }, { 0x203E, 0x203E }, { 0x2074, 0x2074 }, + { 0x207F, 0x207F }, { 0x2081, 0x2084 }, { 0x20AC, 0x20AC }, + { 0x2103, 0x2103 }, { 0x2105, 0x2105 }, { 0x2109, 0x2109 }, + { 0x2113, 0x2113 }, { 0x2116, 0x2116 }, { 0x2121, 0x2122 }, + { 0x2126, 0x2126 }, { 0x212B, 0x212B }, { 0x2153, 0x2154 }, + { 0x215B, 0x215E }, { 0x2160, 0x216B }, { 0x2170, 0x2179 }, + { 0x2190, 0x2199 }, { 0x21B8, 0x21B9 }, { 0x21D2, 0x21D2 }, + { 0x21D4, 0x21D4 }, { 0x21E7, 0x21E7 }, { 0x2200, 0x2200 }, + { 0x2202, 0x2203 }, { 0x2207, 0x2208 }, { 0x220B, 0x220B }, + { 0x220F, 0x220F }, { 0x2211, 0x2211 }, { 0x2215, 0x2215 }, + { 0x221A, 0x221A }, { 0x221D, 0x2220 }, { 0x2223, 0x2223 }, + { 0x2225, 0x2225 }, { 0x2227, 0x222C }, { 0x222E, 0x222E }, + { 0x2234, 0x2237 }, { 0x223C, 0x223D }, { 0x2248, 0x2248 }, + { 0x224C, 0x224C }, { 0x2252, 0x2252 }, { 0x2260, 0x2261 }, + { 0x2264, 0x2267 }, { 0x226A, 0x226B }, { 0x226E, 0x226F }, + { 0x2282, 0x2283 }, { 0x2286, 0x2287 }, { 0x2295, 0x2295 }, + { 0x2299, 0x2299 }, { 0x22A5, 0x22A5 }, { 0x22BF, 0x22BF }, + { 0x2312, 0x2312 }, { 0x2460, 0x24E9 }, { 0x24EB, 0x254B }, + { 0x2550, 0x2573 }, { 0x2580, 0x258F }, { 0x2592, 0x2595 }, + { 0x25A0, 0x25A1 }, { 0x25A3, 0x25A9 }, { 0x25B2, 0x25B3 }, + { 0x25B6, 0x25B7 }, { 0x25BC, 0x25BD }, { 0x25C0, 0x25C1 }, + { 0x25C6, 0x25C8 }, { 0x25CB, 0x25CB }, { 0x25CE, 0x25D1 }, + { 0x25E2, 0x25E5 }, { 0x25EF, 0x25EF }, { 0x2605, 0x2606 }, + { 0x2609, 0x2609 }, { 0x260E, 0x260F }, { 0x2614, 0x2615 }, + { 0x261C, 0x261C }, { 0x261E, 0x261E }, { 0x2640, 0x2640 }, + { 0x2642, 0x2642 }, { 0x2660, 0x2661 }, { 0x2663, 0x2665 }, + { 0x2667, 0x266A }, { 0x266C, 0x266D }, { 0x266F, 0x266F }, + { 0x273D, 0x273D }, { 0x2776, 0x277F }, { 0xE000, 0xF8FF }, + { 0xFFFD, 0xFFFD }, { 0xF0000, 0xFFFFD }, { 0x100000, 0x10FFFD } + }; + + /* binary search in table of non-spacing characters */ + if (bisearch(ucs, ambiguous, + sizeof(ambiguous) / sizeof(struct interval) - 1)) + return 2; + + return mk_wcwidth(ucs); +} + + +int mk_wcswidth_cjk(const wchar_t *pwcs, size_t n) +{ + int w, width = 0; + + for (;*pwcs && n-- > 0; pwcs++) + if ((w = mk_wcwidth_cjk(*pwcs)) < 0) + return -1; + else + width += w; + + return width; +} + +} diff --git a/src/nix/local.mk b/src/nix/local.mk index c7d2d328aab5..bddd53b168d3 100644 --- a/src/nix/local.mk +++ b/src/nix/local.mk @@ -2,7 +2,7 @@ programs += nix nix_DIR := $(d) -nix_SOURCES := $(wildcard $(d)/*.cc) src/linenoise/linenoise.c +nix_SOURCES := $(wildcard $(d)/*.cc) $(wildcard src/linenoise/*.cpp) nix_LIBS = libexpr libmain libstore libutil libformat diff --git a/src/nix/repl.cc b/src/nix/repl.cc index 28a8ebc8c499..1adb816c5bf0 100644 --- a/src/nix/repl.cc +++ b/src/nix/repl.cc @@ -185,7 +185,7 @@ void NixRepl::mainLoop(const std::vector<std::string> & files) bool NixRepl::getLine(string & input, const std::string &prompt) { char * s = linenoise(prompt.c_str()); - Finally doFree([&]() { linenoiseFree(s); }); + Finally doFree([&]() { free(s); }); if (!s) return false; input += s; return true; |