diff options
Diffstat (limited to 'absl/strings/numbers.h')
| -rw-r--r-- | absl/strings/numbers.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/absl/strings/numbers.h b/absl/strings/numbers.h index 9b8ec89a8941..5e15ca40b736 100644 --- a/absl/strings/numbers.h +++ b/absl/strings/numbers.h @@ -67,7 +67,7 @@ ABSL_MUST_USE_RESULT bool SimpleAtoi(absl::string_view str, int_type* out); // Converts the given string (optionally followed or preceded by ASCII // whitespace) into a float, which may be rounded on overflow or underflow. // See https://en.cppreference.com/w/c/string/byte/strtof for details about the -// allowed formats for `str`, except SimpleAtof() is locale-indepdent and will +// allowed formats for `str`, except SimpleAtof() is locale-independent and will // always use the "C" locale. If any errors are encountered, this function // returns `false`, leaving `out` in an unspecified state. ABSL_MUST_USE_RESULT bool SimpleAtof(absl::string_view str, float* out); @@ -102,12 +102,26 @@ namespace numbers_internal { // Digit conversion. extern const char kHexChar[17]; // 0123456789abcdef extern const char kHexTable[513]; // 000102030405060708090a0b0c0d0e0f1011... +extern const char two_ASCII_digits[100][2]; // 00, 01, 02, 03... + +// Writes a two-character representation of 'i' to 'buf'. 'i' must be in the +// range 0 <= i < 100, and buf must have space for two characters. Example: +// char buf[2]; +// PutTwoDigits(42, buf); +// // buf[0] == '4' +// // buf[1] == '2' +inline void PutTwoDigits(size_t i, char* buf) { + assert(i < 100); + memcpy(buf, two_ASCII_digits[i], 2); +} // safe_strto?() functions for implementing SimpleAtoi() bool safe_strto32_base(absl::string_view text, int32_t* value, int base); bool safe_strto64_base(absl::string_view text, int64_t* value, int base); bool safe_strtou32_base(absl::string_view text, uint32_t* value, int base); bool safe_strtou64_base(absl::string_view text, uint64_t* value, int base); +bool safe_strtou128_base(absl::string_view text, absl::uint128* value, + int base); static const int kFastToBufferSize = 32; static const int kSixDigitsToBufferSize = 16; @@ -232,6 +246,11 @@ ABSL_MUST_USE_RESULT bool SimpleAtoi(absl::string_view str, int_type* out) { return numbers_internal::safe_strtoi_base(str, out, 10); } +ABSL_MUST_USE_RESULT inline bool SimpleAtoi(absl::string_view str, + absl::uint128* out) { + return numbers_internal::safe_strtou128_base(str, out, 10); +} + } // namespace absl #endif // ABSL_STRINGS_NUMBERS_H_ |