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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-03-09 13:19:22 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-03-09 13:19:22 +0000 |
commit | c21c3b0befeb46a51b6bf3758ffa30813bea0ff0 (patch) | |
tree | 9754ff1ca740f6346cf8483ec915d4054bc5da2d /web/server/h2o/libh2o/deps/brotli/dec/state.c | |
parent | Adding upstream version 1.43.2. (diff) | |
download | netdata-upstream/1.44.3.tar.xz netdata-upstream/1.44.3.zip |
Adding upstream version 1.44.3.upstream/1.44.3
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | web/server/h2o/libh2o/deps/brotli/dec/state.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/deps/brotli/dec/state.c b/web/server/h2o/libh2o/deps/brotli/dec/state.c new file mode 100644 index 000000000..52c0e6c8f --- /dev/null +++ b/web/server/h2o/libh2o/deps/brotli/dec/state.c @@ -0,0 +1,178 @@ +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "./state.h" + +#include <stdlib.h> /* free, malloc */ + +#include "./huffman.h" +#include "./types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +static void* DefaultAllocFunc(void* opaque, size_t size) { + BROTLI_UNUSED(opaque); + return malloc(size); +} + +static void DefaultFreeFunc(void* opaque, void* address) { + BROTLI_UNUSED(opaque); + free(address); +} + +void BrotliStateInit(BrotliState* s) { + BrotliStateInitWithCustomAllocators(s, 0, 0, 0); +} + +void BrotliStateInitWithCustomAllocators(BrotliState* s, + brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque) { + if (!alloc_func) { + s->alloc_func = DefaultAllocFunc; + s->free_func = DefaultFreeFunc; + s->memory_manager_opaque = 0; + } else { + s->alloc_func = alloc_func; + s->free_func = free_func; + s->memory_manager_opaque = opaque; + } + + BrotliInitBitReader(&s->br); + s->state = BROTLI_STATE_UNINITED; + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE; + s->substate_tree_group = BROTLI_STATE_TREE_GROUP_NONE; + s->substate_context_map = BROTLI_STATE_CONTEXT_MAP_NONE; + s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_NONE; + s->substate_huffman = BROTLI_STATE_HUFFMAN_NONE; + s->substate_decode_uint8 = BROTLI_STATE_DECODE_UINT8_NONE; + s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_NONE; + + s->buffer_length = 0; + s->loop_counter = 0; + s->pos = 0; + s->rb_roundtrips = 0; + s->partial_pos_out = 0; + + s->block_type_trees = NULL; + s->block_len_trees = NULL; + s->ringbuffer = NULL; + + s->context_map = NULL; + s->context_modes = NULL; + s->dist_context_map = NULL; + s->context_map_slice = NULL; + s->dist_context_map_slice = NULL; + + s->sub_loop_counter = 0; + + s->literal_hgroup.codes = NULL; + s->literal_hgroup.htrees = NULL; + s->insert_copy_hgroup.codes = NULL; + s->insert_copy_hgroup.htrees = NULL; + s->distance_hgroup.codes = NULL; + s->distance_hgroup.htrees = NULL; + + + s->custom_dict = NULL; + s->custom_dict_size = 0; + + s->is_last_metablock = 0; + s->window_bits = 0; + s->max_distance = 0; + s->dist_rb[0] = 16; + s->dist_rb[1] = 15; + s->dist_rb[2] = 11; + s->dist_rb[3] = 4; + s->dist_rb_idx = 0; + s->block_type_trees = NULL; + s->block_len_trees = NULL; + + /* Make small negative indexes addressable. */ + s->symbol_lists = &s->symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1]; + + s->mtf_upper_bound = 255; +} + +void BrotliStateMetablockBegin(BrotliState* s) { + s->meta_block_remaining_len = 0; + s->block_length[0] = 1U << 28; + s->block_length[1] = 1U << 28; + s->block_length[2] = 1U << 28; + s->num_block_types[0] = 1; + s->num_block_types[1] = 1; + s->num_block_types[2] = 1; + s->block_type_rb[0] = 1; + s->block_type_rb[1] = 0; + s->block_type_rb[2] = 1; + s->block_type_rb[3] = 0; + s->block_type_rb[4] = 1; + s->block_type_rb[5] = 0; + s->context_map = NULL; + s->context_modes = NULL; + s->dist_context_map = NULL; + s->context_map_slice = NULL; + s->literal_htree_index = 0; + s->literal_htree = NULL; + s->dist_context_map_slice = NULL; + s->dist_htree_index = 0; + s->context_lookup1 = NULL; + s->context_lookup2 = NULL; + s->literal_hgroup.codes = NULL; + s->literal_hgroup.htrees = NULL; + s->insert_copy_hgroup.codes = NULL; + s->insert_copy_hgroup.htrees = NULL; + s->distance_hgroup.codes = NULL; + s->distance_hgroup.htrees = NULL; +} + +void BrotliStateCleanupAfterMetablock(BrotliState* s) { + BROTLI_FREE(s, s->context_modes); + BROTLI_FREE(s, s->context_map); + BROTLI_FREE(s, s->dist_context_map); + + BrotliHuffmanTreeGroupRelease(s, &s->literal_hgroup); + BrotliHuffmanTreeGroupRelease(s, &s->insert_copy_hgroup); + BrotliHuffmanTreeGroupRelease(s, &s->distance_hgroup); +} + +void BrotliStateCleanup(BrotliState* s) { + BrotliStateCleanupAfterMetablock(s); + + BROTLI_FREE(s, s->ringbuffer); + BROTLI_FREE(s, s->block_type_trees); +} + +int BrotliStateIsStreamStart(const BrotliState* s) { + return (s->state == BROTLI_STATE_UNINITED && + BrotliGetAvailableBits(&s->br) == 0); +} + +int BrotliStateIsStreamEnd(const BrotliState* s) { + return s->state == BROTLI_STATE_DONE; +} + +void BrotliHuffmanTreeGroupInit(BrotliState* s, HuffmanTreeGroup* group, + uint32_t alphabet_size, uint32_t ntrees) { + /* Pack two allocations into one */ + const size_t max_table_size = kMaxHuffmanTableSize[(alphabet_size + 31) >> 5]; + const size_t code_size = sizeof(HuffmanCode) * ntrees * max_table_size; + const size_t htree_size = sizeof(HuffmanCode*) * ntrees; + char* p = (char*)BROTLI_ALLOC(s, code_size + htree_size); + group->alphabet_size = (uint16_t)alphabet_size; + group->num_htrees = (uint16_t)ntrees; + group->codes = (HuffmanCode*)p; + group->htrees = (HuffmanCode**)(p + code_size); +} + +void BrotliHuffmanTreeGroupRelease(BrotliState* s, HuffmanTreeGroup* group) { + BROTLI_FREE(s, group->codes); + group->htrees = NULL; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif |