diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/strings/escaping.h')
| -rw-r--r-- | third_party/abseil_cpp/absl/strings/escaping.h | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/third_party/abseil_cpp/absl/strings/escaping.h b/third_party/abseil_cpp/absl/strings/escaping.h deleted file mode 100644 index f5ca26c5da..0000000000 --- a/third_party/abseil_cpp/absl/strings/escaping.h +++ /dev/null @@ -1,164 +0,0 @@ -// -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// ----------------------------------------------------------------------------- -// File: escaping.h -// ----------------------------------------------------------------------------- -// -// This header file contains string utilities involved in escaping and -// unescaping strings in various ways. - -#ifndef ABSL_STRINGS_ESCAPING_H_ -#define ABSL_STRINGS_ESCAPING_H_ - -#include <cstddef> -#include <string> -#include <vector> - -#include "absl/base/macros.h" -#include "absl/strings/ascii.h" -#include "absl/strings/str_join.h" -#include "absl/strings/string_view.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN - -// CUnescape() -// -// Unescapes a `source` string and copies it into `dest`, rewriting C-style -// escape sequences (https://en.cppreference.com/w/cpp/language/escape) into -// their proper code point equivalents, returning `true` if successful. -// -// The following unescape sequences can be handled: -// -// * ASCII escape sequences ('\n','\r','\\', etc.) to their ASCII equivalents -// * Octal escape sequences ('\nnn') to byte nnn. The unescaped value must -// resolve to a single byte or an error will occur. E.g. values greater than -// 0xff will produce an error. -// * Hexadecimal escape sequences ('\xnn') to byte nn. While an arbitrary -// number of following digits are allowed, the unescaped value must resolve -// to a single byte or an error will occur. E.g. '\x0045' is equivalent to -// '\x45', but '\x1234' will produce an error. -// * Unicode escape sequences ('\unnnn' for exactly four hex digits or -// '\Unnnnnnnn' for exactly eight hex digits, which will be encoded in -// UTF-8. (E.g., `\u2019` unescapes to the three bytes 0xE2, 0x80, and -// 0x99). -// -// If any errors are encountered, this function returns `false`, leaving the -// `dest` output parameter in an unspecified state, and stores the first -// encountered error in `error`. To disable error reporting, set `error` to -// `nullptr` or use the overload with no error reporting below. -// -// Example: -// -// std::string s = "foo\\rbar\\nbaz\\t"; -// std::string unescaped_s; -// if (!absl::CUnescape(s, &unescaped_s) { -// ... -// } -// EXPECT_EQ(unescaped_s, "foo\rbar\nbaz\t"); -bool CUnescape(absl::string_view source, std::string* dest, std::string* error); - -// Overload of `CUnescape()` with no error reporting. -inline bool CUnescape(absl::string_view source, std::string* dest) { - return CUnescape(source, dest, nullptr); -} - -// CEscape() -// -// Escapes a 'src' string using C-style escapes sequences -// (https://en.cppreference.com/w/cpp/language/escape), escaping other -// non-printable/non-whitespace bytes as octal sequences (e.g. "\377"). -// -// Example: -// -// std::string s = "foo\rbar\tbaz\010\011\012\013\014\x0d\n"; -// std::string escaped_s = absl::CEscape(s); -// EXPECT_EQ(escaped_s, "foo\\rbar\\tbaz\\010\\t\\n\\013\\014\\r\\n"); -std::string CEscape(absl::string_view src); - -// CHexEscape() -// -// Escapes a 'src' string using C-style escape sequences, escaping -// other non-printable/non-whitespace bytes as hexadecimal sequences (e.g. -// "\xFF"). -// -// Example: -// -// std::string s = "foo\rbar\tbaz\010\011\012\013\014\x0d\n"; -// std::string escaped_s = absl::CHexEscape(s); -// EXPECT_EQ(escaped_s, "foo\\rbar\\tbaz\\x08\\t\\n\\x0b\\x0c\\r\\n"); -std::string CHexEscape(absl::string_view src); - -// Utf8SafeCEscape() -// -// Escapes a 'src' string using C-style escape sequences, escaping bytes as -// octal sequences, and passing through UTF-8 characters without conversion. -// I.e., when encountering any bytes with their high bit set, this function -// will not escape those values, whether or not they are valid UTF-8. -std::string Utf8SafeCEscape(absl::string_view src); - -// Utf8SafeCHexEscape() -// -// Escapes a 'src' string using C-style escape sequences, escaping bytes as -// hexadecimal sequences, and passing through UTF-8 characters without -// conversion. -std::string Utf8SafeCHexEscape(absl::string_view src); - -// Base64Unescape() -// -// Converts a `src` string encoded in Base64 to its binary equivalent, writing -// it to a `dest` buffer, returning `true` on success. If `src` contains invalid -// characters, `dest` is cleared and returns `false`. -bool Base64Unescape(absl::string_view src, std::string* dest); - -// WebSafeBase64Unescape() -// -// Converts a `src` string encoded in Base64 to its binary equivalent, writing -// it to a `dest` buffer, but using '-' instead of '+', and '_' instead of '/'. -// If `src` contains invalid characters, `dest` is cleared and returns `false`. -bool WebSafeBase64Unescape(absl::string_view src, std::string* dest); - -// Base64Escape() -// -// Encodes a `src` string into a base64-encoded string, with padding characters. -// This function conforms with RFC 4648 section 4 (base64). -void Base64Escape(absl::string_view src, std::string* dest); -std::string Base64Escape(absl::string_view src); - -// WebSafeBase64Escape() -// -// Encodes a `src` string into a base64-like string, using '-' instead of '+' -// and '_' instead of '/', and without padding. This function conforms with RFC -// 4648 section 5 (base64url). -void WebSafeBase64Escape(absl::string_view src, std::string* dest); -std::string WebSafeBase64Escape(absl::string_view src); - -// HexStringToBytes() -// -// Converts an ASCII hex string into bytes, returning binary data of length -// `from.size()/2`. -std::string HexStringToBytes(absl::string_view from); - -// BytesToHexString() -// -// Converts binary data into an ASCII text string, returning a string of size -// `2*from.size()`. -std::string BytesToHexString(absl::string_view from); - -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_STRINGS_ESCAPING_H_ |