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https://github.com/google/brotli.git
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533843e354
Update * make the zopflification aware of `NDIRECT`, `NPOSTFIX` (better compression in `font` mode) * add small and simple decoder tool * fix typo * Java: wrapper: make decoder channel more async-friendly Ramp up version to 1.0.3 / 1.0.3
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/* Copyright 2018 Google Inc. All Rights Reserved.
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Distributed under MIT license.
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See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <brotli/decode.h>
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#define BUFFER_SIZE (1u << 20)
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typedef struct Context {
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FILE* fin;
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FILE* fout;
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uint8_t* input_buffer;
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uint8_t* output_buffer;
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BrotliDecoderState* decoder;
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} Context;
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void init(Context* ctx) {
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ctx->fin = 0;
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ctx->fout = 0;
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ctx->input_buffer = 0;
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ctx->output_buffer = 0;
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ctx->decoder = 0;
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}
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void cleanup(Context* ctx) {
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if (ctx->decoder) BrotliDecoderDestroyInstance(ctx->decoder);
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if (ctx->output_buffer) free(ctx->output_buffer);
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if (ctx->input_buffer) free(ctx->input_buffer);
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if (ctx->fout) fclose(ctx->fout);
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if (ctx->fin) fclose(ctx->fin);
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}
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void fail(Context* ctx, const char* message) {
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fprintf(stderr, "%s\n", message);
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exit(1);
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}
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int main(int argc, char** argv) {
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Context ctx;
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BrotliDecoderResult result = BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT;
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size_t available_in;
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const uint8_t* next_in;
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size_t available_out = BUFFER_SIZE;
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uint8_t* next_out;
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init(&ctx);
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ctx.fin = fdopen(STDIN_FILENO, "rb");
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if (!ctx.fin) fail(&ctx, "can't open input file");
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ctx.fout = fdopen(STDOUT_FILENO, "wb");
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if (!ctx.fout) fail(&ctx, "can't open output file");
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ctx.input_buffer = (uint8_t*)malloc(BUFFER_SIZE);
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if (!ctx.input_buffer) fail(&ctx, "out of memory / input buffer");
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ctx.output_buffer = (uint8_t*)malloc(BUFFER_SIZE);
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if (!ctx.output_buffer) fail(&ctx, "out of memory / output buffer");
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ctx.decoder = BrotliDecoderCreateInstance(0, 0, 0);
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if (!ctx.decoder) fail(&ctx, "out of memory / decoder");
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BrotliDecoderSetParameter(ctx.decoder, BROTLI_DECODER_PARAM_LARGE_WINDOW, 1);
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next_out = ctx.output_buffer;
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while (1) {
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if (result == BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT) {
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if (feof(ctx.fin)) break;
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available_in = fread(ctx.input_buffer, 1, BUFFER_SIZE, ctx.fin);
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next_in = ctx.input_buffer;
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if (ferror(ctx.fin)) break;
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} else if (result == BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT) {
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fwrite(ctx.output_buffer, 1, BUFFER_SIZE, ctx.fout);
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if (ferror(ctx.fout)) break;
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available_out = BUFFER_SIZE;
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next_out = ctx.output_buffer;
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} else {
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break;
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}
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result = BrotliDecoderDecompressStream(
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ctx.decoder, &available_in, &next_in, &available_out, &next_out, 0);
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}
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if (next_out != ctx.output_buffer) {
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fwrite(ctx.output_buffer, 1, next_out - ctx.output_buffer, ctx.fout);
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}
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if ((result == BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT) || ferror(ctx.fout)) {
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fail(&ctx, "failed to write output");
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} else if (result != BROTLI_DECODER_RESULT_SUCCESS) {
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fail(&ctx, "corrupt input");
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}
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cleanup(&ctx);
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return 0;
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}
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