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)
16extern "C" {
17#endif
18
19static 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. */
24BROTLI_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