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The new API is C, not C++! It's also much easier to work with, and supports everything we need.
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| /* Copyright (c) 2015-2016 The Squash Authors | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person | ||
| * obtaining a copy of this software and associated documentation | ||
| * files (the "Software"), to deal in the Software without | ||
| * restriction, including without limitation the rights to use, copy, | ||
| * modify, merge, publish, distribute, sublicense, and/or sell copies | ||
| * of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be | ||
| * included in all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | ||
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | ||
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| * | ||
| * Authors: | ||
| * Evan Nemerson <evan@nemerson.com> | ||
| * Eugene Kliuchnikov <eustas.ru+squash@gmail.com> | ||
| */ | ||
|
|
||
| #include <assert.h> | ||
| #include <string.h> | ||
|
|
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| #include <squash/squash.h> | ||
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| #include "brotli/enc/encode.h" | ||
| #include "brotli/dec/decode.h" | ||
|
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| enum SquashBrotliOptionIndex { | ||
| SQUASH_BROTLI_OPT_LEVEL = 0, | ||
| SQUASH_BROTLI_OPT_WINDOW_SIZE, | ||
| SQUASH_BROTLI_OPT_BLOCK_SIZE, | ||
| SQUASH_BROTLI_OPT_MODE | ||
| }; | ||
|
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||
| static SquashOptionInfo squash_brotli_options[] = { | ||
| { "level", | ||
| SQUASH_OPTION_TYPE_RANGE_INT, | ||
| .info.range_int = { | ||
| .min = 0, | ||
| .max = 11 }, | ||
| .default_value.int_value = BROTLI_DEFAULT_QUALITY }, | ||
| { "window-size", | ||
| SQUASH_OPTION_TYPE_RANGE_INT, | ||
| .info.range_int = { | ||
| .min = 10, | ||
| .max = 24 }, | ||
| .default_value.int_value = BROTLI_DEFAULT_WINDOW }, | ||
| { "block-size", | ||
| SQUASH_OPTION_TYPE_RANGE_INT, | ||
| .info.range_int = { | ||
| .min = 16, | ||
| .max = 24, | ||
| .modulus = 0, | ||
| .allow_zero = true}, | ||
| .default_value.int_value = 0 }, | ||
| { "mode", | ||
| SQUASH_OPTION_TYPE_ENUM_STRING, | ||
| .info.enum_string = { | ||
| .values = (const SquashOptionInfoEnumStringMap []) { | ||
| { "generic", BROTLI_MODE_GENERIC }, | ||
| { "text", BROTLI_MODE_TEXT }, | ||
| { "font", BROTLI_MODE_FONT }, | ||
| { NULL, 0 } } }, | ||
| .default_value.int_value = BROTLI_MODE_GENERIC }, | ||
| { NULL, SQUASH_OPTION_TYPE_NONE, } | ||
| }; | ||
|
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| typedef struct SquashBrotliStream_s { | ||
| SquashStream base_object; | ||
|
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| union { | ||
| BrotliEncoderState* encoder; | ||
| BrotliState* decoder; | ||
| } ctx; | ||
| } SquashBrotliStream; | ||
|
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| SQUASH_PLUGIN_EXPORT | ||
| SquashStatus squash_plugin_init_codec (SquashCodec* codec, SquashCodecImpl* impl); | ||
|
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| static void squash_brotli_stream_init (SquashBrotliStream* stream, | ||
| SquashCodec* codec, | ||
| SquashStreamType stream_type, | ||
| SquashOptions* options, | ||
| SquashDestroyNotify destroy_notify); | ||
| static SquashBrotliStream* squash_brotli_stream_new (SquashCodec* codec, | ||
| SquashStreamType stream_type, | ||
| SquashOptions* options); | ||
| static void squash_brotli_stream_destroy (void* stream); | ||
|
|
||
| static void* | ||
| squash_brotli_malloc (void* opaque, size_t size) { | ||
| return squash_malloc (size); | ||
| } | ||
|
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| static void | ||
| squash_brotli_free (void* opaque, void* ptr) { | ||
| squash_free (ptr); | ||
| } | ||
|
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| static SquashBrotliStream* | ||
| squash_brotli_stream_new (SquashCodec* codec, SquashStreamType stream_type, SquashOptions* options) { | ||
| SquashBrotliStream* stream; | ||
|
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| assert (codec != NULL); | ||
| assert (stream_type == SQUASH_STREAM_COMPRESS || stream_type == SQUASH_STREAM_DECOMPRESS); | ||
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| stream = (SquashBrotliStream*) squash_malloc (sizeof (SquashBrotliStream)); | ||
| squash_brotli_stream_init (stream, codec, stream_type, options, squash_brotli_stream_destroy); | ||
|
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| return stream; | ||
| } | ||
|
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| static void | ||
| squash_brotli_stream_init (SquashBrotliStream* s, | ||
| SquashCodec* codec, | ||
| SquashStreamType stream_type, | ||
| SquashOptions* options, | ||
| SquashDestroyNotify destroy_notify) { | ||
| SquashStream* stream = (SquashStream*) s; | ||
| squash_stream_init (stream, codec, stream_type, (SquashOptions*) options, destroy_notify); | ||
|
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| if (stream_type == SQUASH_STREAM_COMPRESS) { | ||
| s->ctx.encoder = BrotliEncoderCreateInstance(squash_brotli_malloc, squash_brotli_free, NULL); | ||
|
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| BrotliEncoderSetParameter(s->ctx.encoder, BROTLI_PARAM_QUALITY, squash_options_get_int_at (options, codec, SQUASH_BROTLI_OPT_LEVEL)); | ||
| BrotliEncoderSetParameter(s->ctx.encoder, BROTLI_PARAM_LGWIN, squash_options_get_int_at (options, codec, SQUASH_BROTLI_OPT_WINDOW_SIZE)); | ||
| BrotliEncoderSetParameter(s->ctx.encoder, BROTLI_PARAM_LGBLOCK, squash_options_get_int_at (options, codec, SQUASH_BROTLI_OPT_BLOCK_SIZE)); | ||
| BrotliEncoderSetParameter(s->ctx.encoder, BROTLI_PARAM_MODE, squash_options_get_int_at (options, codec, SQUASH_BROTLI_OPT_MODE)); | ||
| } else if (stream_type == SQUASH_STREAM_DECOMPRESS) { | ||
| s->ctx.decoder = BrotliCreateState(squash_brotli_malloc, squash_brotli_free, NULL); | ||
| } else { | ||
| squash_assert_unreachable(); | ||
| } | ||
| } | ||
|
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| static void | ||
| squash_brotli_stream_destroy (void* stream) { | ||
| SquashBrotliStream* s = (SquashBrotliStream*) stream; | ||
|
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| if (((SquashStream*) stream)->stream_type == SQUASH_STREAM_COMPRESS) { | ||
| BrotliEncoderDestroyInstance(s->ctx.encoder); | ||
| } else if (((SquashStream*) stream)->stream_type == SQUASH_STREAM_DECOMPRESS) { | ||
| BrotliDestroyState(s->ctx.decoder); | ||
| } else { | ||
| squash_assert_unreachable(); | ||
| } | ||
|
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| squash_stream_destroy (stream); | ||
| } | ||
|
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| static SquashStream* | ||
| squash_brotli_create_stream (SquashCodec* codec, SquashStreamType stream_type, SquashOptions* options) { | ||
| return (SquashStream*) squash_brotli_stream_new (codec, stream_type, options); | ||
| } | ||
|
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| static BrotliEncoderOperation | ||
| squash_brotli_encoder_operation_from_squash_operation (const SquashOperation operation) { | ||
| switch (operation) { | ||
| case SQUASH_OPERATION_PROCESS: | ||
| return BROTLI_OPERATION_PROCESS; | ||
| case SQUASH_OPERATION_FLUSH: | ||
| return BROTLI_OPERATION_FLUSH; | ||
| case SQUASH_OPERATION_FINISH: | ||
| return BROTLI_OPERATION_FINISH; | ||
| case SQUASH_OPERATION_TERMINATE: | ||
| default: | ||
| squash_assert_unreachable (); | ||
| } | ||
| } | ||
|
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| static SquashStatus | ||
| squash_brotli_process_stream (SquashStream* stream, SquashOperation operation) { | ||
| SquashBrotliStream* s = (SquashBrotliStream*) stream; | ||
|
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| if (stream->stream_type == SQUASH_STREAM_COMPRESS) { | ||
| const int be_ret = | ||
| BrotliEncoderCompressStream(s->ctx.encoder, | ||
| squash_brotli_encoder_operation_from_squash_operation(operation), | ||
| &(stream->avail_in), &(stream->next_in), | ||
| &(stream->avail_out), &(stream->next_out), | ||
| NULL); | ||
|
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| if (SQUASH_UNLIKELY(be_ret != 1)) | ||
| return squash_error (SQUASH_FAILED); | ||
| else if (stream->avail_in != 0 || BrotliEncoderHasMoreOutput(s->ctx.encoder)) | ||
| return SQUASH_PROCESSING; | ||
| else | ||
| return SQUASH_OK; | ||
| } else if (stream->stream_type == SQUASH_STREAM_DECOMPRESS) { | ||
| const BrotliResult bd_ret = | ||
| BrotliDecompressStream(&(stream->avail_in), &(stream->next_in), | ||
| &(stream->avail_out), &(stream->next_out), | ||
| NULL, | ||
| s->ctx.decoder); | ||
| fprintf(stderr, "%s:%d: %d\n", __FILE__, __LINE__, bd_ret); | ||
|
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| switch (bd_ret) { | ||
| case BROTLI_RESULT_SUCCESS: | ||
| return SQUASH_OK; | ||
| case BROTLI_RESULT_NEEDS_MORE_INPUT: | ||
| return SQUASH_OK; | ||
| case BROTLI_RESULT_NEEDS_MORE_OUTPUT: | ||
| return SQUASH_PROCESSING; | ||
| case BROTLI_RESULT_ERROR: | ||
| return SQUASH_FAILED; | ||
| } | ||
|
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| if (SQUASH_UNLIKELY(bd_ret != BROTLI_RESULT_SUCCESS)) | ||
| return squash_error (SQUASH_FAILED); | ||
| else if (BrotliStateIsStreamEnd(s->ctx.decoder)) | ||
| return SQUASH_END_OF_STREAM; | ||
| } else { | ||
| squash_assert_unreachable (); | ||
| } | ||
|
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| squash_assert_unreachable (); | ||
| } | ||
|
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| static size_t | ||
| squash_brotli_get_max_compressed_size (SquashCodec* codec, size_t uncompressed_size) { | ||
| return BrotliEncoderMaxCompressedSize(uncompressed_size); | ||
| } | ||
|
|
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| static SquashStatus | ||
| squash_brotli_compress_buffer (SquashCodec* codec, | ||
| size_t* compressed_size, | ||
| uint8_t compressed[SQUASH_ARRAY_PARAM(*compressed_size)], | ||
| size_t uncompressed_size, | ||
| const uint8_t uncompressed[SQUASH_ARRAY_PARAM(uncompressed_size)], | ||
| SquashOptions* options) { | ||
| const int quality = squash_options_get_int_at (options, codec, SQUASH_BROTLI_OPT_LEVEL); | ||
| const int lgwin = squash_options_get_int_at (options, codec, SQUASH_BROTLI_OPT_WINDOW_SIZE); | ||
| const BrotliEncoderMode mode = squash_options_get_int_at (options, codec, SQUASH_BROTLI_OPT_MODE); | ||
|
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| const int res = BrotliEncoderCompress (quality, lgwin, mode, uncompressed_size, uncompressed, compressed_size, compressed); | ||
|
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| return SQUASH_LIKELY(res == 1) ? SQUASH_OK : squash_error (SQUASH_BUFFER_FULL); | ||
| } | ||
|
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| static SquashStatus | ||
| squash_brotli_decompress_buffer (SquashCodec* codec, | ||
| size_t* decompressed_size, | ||
| uint8_t decompressed[SQUASH_ARRAY_PARAM(*decompressed_size)], | ||
| size_t compressed_size, | ||
| const uint8_t compressed[SQUASH_ARRAY_PARAM(compressed_size)], | ||
| SquashOptions* options) { | ||
| const BrotliResult res = BrotliDecompressBuffer(compressed_size, compressed, decompressed_size, decompressed); | ||
|
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| return SQUASH_LIKELY(res == BROTLI_RESULT_SUCCESS) ? SQUASH_OK : squash_error (SQUASH_BUFFER_FULL); | ||
| } | ||
|
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| SquashStatus | ||
| squash_plugin_init_codec (SquashCodec* codec, SquashCodecImpl* impl) { | ||
| const char* name = squash_codec_get_name (codec); | ||
|
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| if (SQUASH_LIKELY(strcmp ("brotli", name) == 0)) { | ||
| impl->info = SQUASH_CODEC_INFO_CAN_FLUSH; | ||
| impl->options = squash_brotli_options; | ||
| impl->get_max_compressed_size = squash_brotli_get_max_compressed_size; | ||
| impl->create_stream = squash_brotli_create_stream; | ||
| impl->process_stream = squash_brotli_process_stream; | ||
| impl->decompress_buffer = squash_brotli_decompress_buffer; | ||
| impl->compress_buffer = squash_brotli_compress_buffer; | ||
| } else { | ||
| return squash_error (SQUASH_UNABLE_TO_LOAD); | ||
| } | ||
|
|
||
| return SQUASH_OK; | ||
| } |
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