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Diffstat (limited to 'deps/node/deps/brotli/c/dec/state.h')
| -rw-r--r-- | deps/node/deps/brotli/c/dec/state.h | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/deps/node/deps/brotli/c/dec/state.h b/deps/node/deps/brotli/c/dec/state.h deleted file mode 100644 index d28b6392..00000000 --- a/deps/node/deps/brotli/c/dec/state.h +++ /dev/null @@ -1,258 +0,0 @@ -/* Copyright 2015 Google Inc. All Rights Reserved. - - Distributed under MIT license. - See file LICENSE for detail or copy at https://opensource.org/licenses/MIT -*/ - -/* Brotli state for partial streaming decoding. */ - -#ifndef BROTLI_DEC_STATE_H_ -#define BROTLI_DEC_STATE_H_ - -#include "../common/constants.h" -#include "../common/dictionary.h" -#include "../common/platform.h" -#include "../common/transform.h" -#include <brotli/types.h> -#include "./bit_reader.h" -#include "./huffman.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -typedef enum { - BROTLI_STATE_UNINITED, - BROTLI_STATE_LARGE_WINDOW_BITS, - BROTLI_STATE_INITIALIZE, - BROTLI_STATE_METABLOCK_BEGIN, - BROTLI_STATE_METABLOCK_HEADER, - BROTLI_STATE_METABLOCK_HEADER_2, - BROTLI_STATE_CONTEXT_MODES, - BROTLI_STATE_COMMAND_BEGIN, - BROTLI_STATE_COMMAND_INNER, - BROTLI_STATE_COMMAND_POST_DECODE_LITERALS, - BROTLI_STATE_COMMAND_POST_WRAP_COPY, - BROTLI_STATE_UNCOMPRESSED, - BROTLI_STATE_METADATA, - BROTLI_STATE_COMMAND_INNER_WRITE, - BROTLI_STATE_METABLOCK_DONE, - BROTLI_STATE_COMMAND_POST_WRITE_1, - BROTLI_STATE_COMMAND_POST_WRITE_2, - BROTLI_STATE_HUFFMAN_CODE_0, - BROTLI_STATE_HUFFMAN_CODE_1, - BROTLI_STATE_HUFFMAN_CODE_2, - BROTLI_STATE_HUFFMAN_CODE_3, - BROTLI_STATE_CONTEXT_MAP_1, - BROTLI_STATE_CONTEXT_MAP_2, - BROTLI_STATE_TREE_GROUP, - BROTLI_STATE_DONE -} BrotliRunningState; - -typedef enum { - BROTLI_STATE_METABLOCK_HEADER_NONE, - BROTLI_STATE_METABLOCK_HEADER_EMPTY, - BROTLI_STATE_METABLOCK_HEADER_NIBBLES, - BROTLI_STATE_METABLOCK_HEADER_SIZE, - BROTLI_STATE_METABLOCK_HEADER_UNCOMPRESSED, - BROTLI_STATE_METABLOCK_HEADER_RESERVED, - BROTLI_STATE_METABLOCK_HEADER_BYTES, - BROTLI_STATE_METABLOCK_HEADER_METADATA -} BrotliRunningMetablockHeaderState; - -typedef enum { - BROTLI_STATE_UNCOMPRESSED_NONE, - BROTLI_STATE_UNCOMPRESSED_WRITE -} BrotliRunningUncompressedState; - -typedef enum { - BROTLI_STATE_TREE_GROUP_NONE, - BROTLI_STATE_TREE_GROUP_LOOP -} BrotliRunningTreeGroupState; - -typedef enum { - BROTLI_STATE_CONTEXT_MAP_NONE, - BROTLI_STATE_CONTEXT_MAP_READ_PREFIX, - BROTLI_STATE_CONTEXT_MAP_HUFFMAN, - BROTLI_STATE_CONTEXT_MAP_DECODE, - BROTLI_STATE_CONTEXT_MAP_TRANSFORM -} BrotliRunningContextMapState; - -typedef enum { - BROTLI_STATE_HUFFMAN_NONE, - BROTLI_STATE_HUFFMAN_SIMPLE_SIZE, - BROTLI_STATE_HUFFMAN_SIMPLE_READ, - BROTLI_STATE_HUFFMAN_SIMPLE_BUILD, - BROTLI_STATE_HUFFMAN_COMPLEX, - BROTLI_STATE_HUFFMAN_LENGTH_SYMBOLS -} BrotliRunningHuffmanState; - -typedef enum { - BROTLI_STATE_DECODE_UINT8_NONE, - BROTLI_STATE_DECODE_UINT8_SHORT, - BROTLI_STATE_DECODE_UINT8_LONG -} BrotliRunningDecodeUint8State; - -typedef enum { - BROTLI_STATE_READ_BLOCK_LENGTH_NONE, - BROTLI_STATE_READ_BLOCK_LENGTH_SUFFIX -} BrotliRunningReadBlockLengthState; - -struct BrotliDecoderStateStruct { - BrotliRunningState state; - - /* This counter is reused for several disjoint loops. */ - int loop_counter; - - BrotliBitReader br; - - brotli_alloc_func alloc_func; - brotli_free_func free_func; - void* memory_manager_opaque; - - /* Temporary storage for remaining input. */ - union { - uint64_t u64; - uint8_t u8[8]; - } buffer; - uint32_t buffer_length; - - int pos; - int max_backward_distance; - int max_distance; - int ringbuffer_size; - int ringbuffer_mask; - int dist_rb_idx; - int dist_rb[4]; - int error_code; - uint32_t sub_loop_counter; - uint8_t* ringbuffer; - uint8_t* ringbuffer_end; - HuffmanCode* htree_command; - const uint8_t* context_lookup; - uint8_t* context_map_slice; - uint8_t* dist_context_map_slice; - - /* This ring buffer holds a few past copy distances that will be used by - some special distance codes. */ - HuffmanTreeGroup literal_hgroup; - HuffmanTreeGroup insert_copy_hgroup; - HuffmanTreeGroup distance_hgroup; - HuffmanCode* block_type_trees; - HuffmanCode* block_len_trees; - /* This is true if the literal context map histogram type always matches the - block type. It is then not needed to keep the context (faster decoding). */ - int trivial_literal_context; - /* Distance context is actual after command is decoded and before distance is - computed. After distance computation it is used as a temporary variable. */ - int distance_context; - int meta_block_remaining_len; - uint32_t block_length_index; - uint32_t block_length[3]; - uint32_t num_block_types[3]; - uint32_t block_type_rb[6]; - uint32_t distance_postfix_bits; - uint32_t num_direct_distance_codes; - int distance_postfix_mask; - uint32_t num_dist_htrees; - uint8_t* dist_context_map; - HuffmanCode* literal_htree; - uint8_t dist_htree_index; - uint32_t repeat_code_len; - uint32_t prev_code_len; - - int copy_length; - int distance_code; - - /* For partial write operations. */ - size_t rb_roundtrips; /* how many times we went around the ring-buffer */ - size_t partial_pos_out; /* how much output to the user in total */ - - /* For ReadHuffmanCode. */ - uint32_t symbol; - uint32_t repeat; - uint32_t space; - - HuffmanCode table[32]; - /* List of heads of symbol chains. */ - uint16_t* symbol_lists; - /* Storage from symbol_lists. */ - uint16_t symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1 + - BROTLI_NUM_COMMAND_SYMBOLS]; - /* Tails of symbol chains. */ - int next_symbol[32]; - uint8_t code_length_code_lengths[BROTLI_CODE_LENGTH_CODES]; - /* Population counts for the code lengths. */ - uint16_t code_length_histo[16]; - - /* For HuffmanTreeGroupDecode. */ - int htree_index; - HuffmanCode* next; - - /* For DecodeContextMap. */ - uint32_t context_index; - uint32_t max_run_length_prefix; - uint32_t code; - HuffmanCode context_map_table[BROTLI_HUFFMAN_MAX_SIZE_272]; - - /* For InverseMoveToFrontTransform. */ - uint32_t mtf_upper_bound; - uint32_t mtf[64 + 1]; - - /* Less used attributes are at the end of this struct. */ - - /* States inside function calls. */ - BrotliRunningMetablockHeaderState substate_metablock_header; - BrotliRunningTreeGroupState substate_tree_group; - BrotliRunningContextMapState substate_context_map; - BrotliRunningUncompressedState substate_uncompressed; - BrotliRunningHuffmanState substate_huffman; - BrotliRunningDecodeUint8State substate_decode_uint8; - BrotliRunningReadBlockLengthState substate_read_block_length; - - unsigned int is_last_metablock : 1; - unsigned int is_uncompressed : 1; - unsigned int is_metadata : 1; - unsigned int should_wrap_ringbuffer : 1; - unsigned int canny_ringbuffer_allocation : 1; - unsigned int large_window : 1; - unsigned int size_nibbles : 8; - uint32_t window_bits; - - int new_ringbuffer_size; - - uint32_t num_literal_htrees; - uint8_t* context_map; - uint8_t* context_modes; - - const BrotliDictionary* dictionary; - const BrotliTransforms* transforms; - - uint32_t trivial_literal_contexts[8]; /* 256 bits */ -}; - -typedef struct BrotliDecoderStateStruct BrotliDecoderStateInternal; -#define BrotliDecoderState BrotliDecoderStateInternal - -BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s, - brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque); -BROTLI_INTERNAL void BrotliDecoderStateCleanup(BrotliDecoderState* s); -BROTLI_INTERNAL void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s); -BROTLI_INTERNAL void BrotliDecoderStateCleanupAfterMetablock( - BrotliDecoderState* s); -BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit( - BrotliDecoderState* s, HuffmanTreeGroup* group, uint32_t alphabet_size, - uint32_t max_symbol, uint32_t ntrees); - -#define BROTLI_DECODER_ALLOC(S, L) S->alloc_func(S->memory_manager_opaque, L) - -#define BROTLI_DECODER_FREE(S, X) { \ - S->free_func(S->memory_manager_opaque, X); \ - X = NULL; \ -} - -#if defined(__cplusplus) || defined(c_plusplus) -} /* extern "C" */ -#endif - -#endif /* BROTLI_DEC_STATE_H_ */ |