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/platform.h" |
13 | #include <brotli/types.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) ring-buffer 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_ */ |
33 | |