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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/state.h')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/state.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/state.h b/Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/state.h new file mode 100644 index 00000000000..cb82987701f --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/state.h @@ -0,0 +1,104 @@ +/* Copyright 2022 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Encoder state. */ + +#ifndef BROTLI_ENC_STATE_H_ +#define BROTLI_ENC_STATE_H_ + +#include <brotli/types.h> + +#include "command.h" +#include "compress_fragment.h" +#include "compress_fragment_two_pass.h" +#include "hash.h" +#include "memory.h" +#include "params.h" +#include "ringbuffer.h" + +typedef enum BrotliEncoderStreamState { + /* Default state. */ + BROTLI_STREAM_PROCESSING = 0, + /* Intermediate state; after next block is emitted, byte-padding should be + performed before getting back to default state. */ + BROTLI_STREAM_FLUSH_REQUESTED = 1, + /* Last metablock was produced; no more input is acceptable. */ + BROTLI_STREAM_FINISHED = 2, + /* Flushing compressed block and writing meta-data block header. */ + BROTLI_STREAM_METADATA_HEAD = 3, + /* Writing metadata block body. */ + BROTLI_STREAM_METADATA_BODY = 4 +} BrotliEncoderStreamState; + +typedef enum BrotliEncoderFlintState { + BROTLI_FLINT_NEEDS_2_BYTES = 2, + BROTLI_FLINT_NEEDS_1_BYTE = 1, + BROTLI_FLINT_WAITING_FOR_PROCESSING = 0, + BROTLI_FLINT_WAITING_FOR_FLUSHING = -1, + BROTLI_FLINT_DONE = -2 +} BrotliEncoderFlintState; + +typedef struct BrotliEncoderStateStruct { + BrotliEncoderParams params; + + MemoryManager memory_manager_; + + uint64_t input_pos_; + RingBuffer ringbuffer_; + size_t cmd_alloc_size_; + Command* commands_; + size_t num_commands_; + size_t num_literals_; + size_t last_insert_len_; + uint64_t last_flush_pos_; + uint64_t last_processed_pos_; + int dist_cache_[BROTLI_NUM_DISTANCE_SHORT_CODES]; + int saved_dist_cache_[4]; + uint16_t last_bytes_; + uint8_t last_bytes_bits_; + /* "Flint" is a tiny uncompressed block emitted before the continuation + block to unwire literal context from previous data. Despite being int8_t, + field is actually BrotliEncoderFlintState enum. */ + int8_t flint_; + uint8_t prev_byte_; + uint8_t prev_byte2_; + size_t storage_size_; + uint8_t* storage_; + + Hasher hasher_; + + /* Hash table for FAST_ONE_PASS_COMPRESSION_QUALITY mode. */ + int small_table_[1 << 10]; /* 4KiB */ + int* large_table_; /* Allocated only when needed */ + size_t large_table_size_; + + BrotliOnePassArena* one_pass_arena_; + BrotliTwoPassArena* two_pass_arena_; + + /* Command and literal buffers for FAST_TWO_PASS_COMPRESSION_QUALITY. */ + uint32_t* command_buf_; + uint8_t* literal_buf_; + + uint64_t total_in_; + uint8_t* next_out_; + size_t available_out_; + uint64_t total_out_; + /* Temporary buffer for padding flush bits or metadata block header / body. */ + union { + uint64_t u64[2]; + uint8_t u8[16]; + } tiny_buf_; + uint32_t remaining_metadata_bytes_; + BrotliEncoderStreamState stream_state_; + + BROTLI_BOOL is_last_block_emitted_; + BROTLI_BOOL is_initialized_; +} BrotliEncoderStateStruct; + +typedef struct BrotliEncoderStateStruct BrotliEncoderStateInternal; +#define BrotliEncoderState BrotliEncoderStateInternal + +#endif // BROTLI_ENC_STATE_H_ |