mirror of
https://github.com/nodejs/node.git
synced 2024-11-28 06:28:40 +01:00
94fcac7876
Refs: https://github.com/google/brotli/releases/tag/v1.0.8 Refs: https://github.com/google/brotli/releases/tag/v1.0.9 PR-URL: https://github.com/nodejs/node/pull/34937 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de> Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
/* transforms is a part of ABI, but not API.
|
|
|
|
It means that there are some functions that are supposed to be in "common"
|
|
library, but header itself is not placed into include/brotli. This way,
|
|
aforementioned functions will be available only to brotli internals.
|
|
*/
|
|
|
|
#ifndef BROTLI_COMMON_TRANSFORM_H_
|
|
#define BROTLI_COMMON_TRANSFORM_H_
|
|
|
|
#include <brotli/port.h>
|
|
#include <brotli/types.h>
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
enum BrotliWordTransformType {
|
|
BROTLI_TRANSFORM_IDENTITY = 0,
|
|
BROTLI_TRANSFORM_OMIT_LAST_1 = 1,
|
|
BROTLI_TRANSFORM_OMIT_LAST_2 = 2,
|
|
BROTLI_TRANSFORM_OMIT_LAST_3 = 3,
|
|
BROTLI_TRANSFORM_OMIT_LAST_4 = 4,
|
|
BROTLI_TRANSFORM_OMIT_LAST_5 = 5,
|
|
BROTLI_TRANSFORM_OMIT_LAST_6 = 6,
|
|
BROTLI_TRANSFORM_OMIT_LAST_7 = 7,
|
|
BROTLI_TRANSFORM_OMIT_LAST_8 = 8,
|
|
BROTLI_TRANSFORM_OMIT_LAST_9 = 9,
|
|
BROTLI_TRANSFORM_UPPERCASE_FIRST = 10,
|
|
BROTLI_TRANSFORM_UPPERCASE_ALL = 11,
|
|
BROTLI_TRANSFORM_OMIT_FIRST_1 = 12,
|
|
BROTLI_TRANSFORM_OMIT_FIRST_2 = 13,
|
|
BROTLI_TRANSFORM_OMIT_FIRST_3 = 14,
|
|
BROTLI_TRANSFORM_OMIT_FIRST_4 = 15,
|
|
BROTLI_TRANSFORM_OMIT_FIRST_5 = 16,
|
|
BROTLI_TRANSFORM_OMIT_FIRST_6 = 17,
|
|
BROTLI_TRANSFORM_OMIT_FIRST_7 = 18,
|
|
BROTLI_TRANSFORM_OMIT_FIRST_8 = 19,
|
|
BROTLI_TRANSFORM_OMIT_FIRST_9 = 20,
|
|
BROTLI_TRANSFORM_SHIFT_FIRST = 21,
|
|
BROTLI_TRANSFORM_SHIFT_ALL = 22,
|
|
BROTLI_NUM_TRANSFORM_TYPES /* Counts transforms, not a transform itself. */
|
|
};
|
|
|
|
#define BROTLI_TRANSFORMS_MAX_CUT_OFF BROTLI_TRANSFORM_OMIT_LAST_9
|
|
|
|
typedef struct BrotliTransforms {
|
|
uint16_t prefix_suffix_size;
|
|
/* Last character must be null, so prefix_suffix_size must be at least 1. */
|
|
const uint8_t* prefix_suffix;
|
|
const uint16_t* prefix_suffix_map;
|
|
uint32_t num_transforms;
|
|
/* Each entry is a [prefix_id, transform, suffix_id] triplet. */
|
|
const uint8_t* transforms;
|
|
/* Shift for BROTLI_TRANSFORM_SHIFT_FIRST and BROTLI_TRANSFORM_SHIFT_ALL,
|
|
must be NULL if and only if no such transforms are present. */
|
|
const uint8_t* params;
|
|
/* Indices of transforms like ["", BROTLI_TRANSFORM_OMIT_LAST_#, ""].
|
|
0-th element corresponds to ["", BROTLI_TRANSFORM_IDENTITY, ""].
|
|
-1, if cut-off transform does not exist. */
|
|
int16_t cutOffTransforms[BROTLI_TRANSFORMS_MAX_CUT_OFF + 1];
|
|
} BrotliTransforms;
|
|
|
|
/* T is BrotliTransforms*; result is uint8_t. */
|
|
#define BROTLI_TRANSFORM_PREFIX_ID(T, I) ((T)->transforms[((I) * 3) + 0])
|
|
#define BROTLI_TRANSFORM_TYPE(T, I) ((T)->transforms[((I) * 3) + 1])
|
|
#define BROTLI_TRANSFORM_SUFFIX_ID(T, I) ((T)->transforms[((I) * 3) + 2])
|
|
|
|
/* T is BrotliTransforms*; result is const uint8_t*. */
|
|
#define BROTLI_TRANSFORM_PREFIX(T, I) (&(T)->prefix_suffix[ \
|
|
(T)->prefix_suffix_map[BROTLI_TRANSFORM_PREFIX_ID(T, I)]])
|
|
#define BROTLI_TRANSFORM_SUFFIX(T, I) (&(T)->prefix_suffix[ \
|
|
(T)->prefix_suffix_map[BROTLI_TRANSFORM_SUFFIX_ID(T, I)]])
|
|
|
|
BROTLI_COMMON_API const BrotliTransforms* BrotliGetTransforms(void);
|
|
|
|
BROTLI_COMMON_API int BrotliTransformDictionaryWord(
|
|
uint8_t* dst, const uint8_t* word, int len,
|
|
const BrotliTransforms* transforms, int transform_idx);
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
#endif /* BROTLI_COMMON_TRANSFORM_H_ */
|