BaseTools/Source/C/BrotliCompress/enc/utf8_util.h

   1 /* Copyright 2013 Google Inc. All Rights Reserved.
   2
   3    Distributed under MIT license.
   4    See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
   5 */
   6
   7 /* Heuristics for deciding about the UTF8-ness of strings. */
   8
   9 #ifndef BROTLI_ENC_UTF8_UTIL_H_
  10 #define BROTLI_ENC_UTF8_UTIL_H_
  11
  12 #include "../common/types.h"
  13 #include "./port.h"
  14
  15 #if defined(__cplusplus) || defined(c_plusplus)
  16 extern "C" {
  17 #endif
  18
  19 static const double kMinUTF8Ratio = 0.75;
  20
  21 /* Returns 1 if at least min_fraction of the bytes between pos and
  22    pos + length in the (data, mask) ringbuffer is UTF8-encoded, otherwise
  23    returns 0. */
  24 BROTLI_INTERNAL BROTLI_BOOL BrotliIsMostlyUTF8(
  25     const uint8_t* data, const size_t pos, const size_t mask,
  26     const size_t length, const double min_fraction);
  27
  28 #if defined(__cplusplus) || defined(c_plusplus)
  29 }  /* extern "C" */
  30 #endif
  31
  32 #endif  /* BROTLI_ENC_UTF8_UTIL_H_ */