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- /*
- * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under both the BSD-style license (found in the
- * LICENSE file in the root directory of this source tree) and the GPLv2 (found
- * in the COPYING file in the root directory of this source tree).
- * You may select, at your option, one of the above-listed licenses.
- */
- #include <stdlib.h> // malloc, free, exit
- #include <stdio.h> // fprintf, perror, feof, fopen, etc.
- #include <string.h> // strlen, memset, strcat
- # define ZSTD_STATIC_LINKING_ONLY
- #include <zstd.h> // presumes zstd library is installed
- #include "utils.h"
- static void compressFile_orDie(const char* fname, const char* outName, int cLevel)
- {
- FILE* const fin = fopen_orDie(fname, "rb");
- FILE* const fout = fopen_orDie(outName, "wb");
- size_t const buffInSize = ZSTD_CStreamInSize(); /* can always read one full block */
- void* const buffIn = malloc_orDie(buffInSize);
- size_t const buffOutSize = ZSTD_CStreamOutSize(); /* can always flush a full block */
- void* const buffOut = malloc_orDie(buffOutSize);
- ZSTD_CStream* const cstream = ZSTD_createCStream();
- if (cstream==NULL) { fprintf(stderr, "ZSTD_createCStream() error \n"); exit(10); }
- // MY CODE START
- #ifdef ZSTD_MULTITHREAD
- assert(!ZSTD_isError(ZSTD_CCtx_setParameter(cstream, ZSTD_c_nbWorkers, 2)));
- #endif
- // size_t const initResult = ZSTD_initCStream(cstream, cLevel);
- // if (ZSTD_isError(initResult)) {
- // fprintf(stderr, "ZSTD_initCStream() error : %s \n",
- // ZSTD_getErrorName(initResult));
- // exit(11);
- // }
- // MY CODE END
- size_t read, toRead = buffInSize;
- while( (read = fread_orDie(buffIn, toRead, fin)) ) {
- ZSTD_inBuffer input = { buffIn, read, 0 };
- while (input.pos < input.size) {
- ZSTD_outBuffer output = { buffOut, buffOutSize, 0 };
- toRead = ZSTD_compressStream(cstream, &output , &input); /* toRead is guaranteed to be <= ZSTD_CStreamInSize() */
- if (ZSTD_isError(toRead)) {
- fprintf(stderr, "ZSTD_compressStream() error : %s \n",
- ZSTD_getErrorName(toRead));
- exit(12);
- }
- if (toRead > buffInSize) toRead = buffInSize; /* Safely handle case when `buffInSize` is manually changed to a value < ZSTD_CStreamInSize()*/
- fwrite_orDie(buffOut, output.pos, fout);
- }
- }
- ZSTD_outBuffer output = { buffOut, buffOutSize, 0 };
- size_t const remainingToFlush = ZSTD_endStream(cstream, &output); /* close frame */
- if (remainingToFlush) { fprintf(stderr, "not fully flushed"); exit(13); }
- fwrite_orDie(buffOut, output.pos, fout);
- ZSTD_freeCStream(cstream);
- fclose_orDie(fout);
- fclose_orDie(fin); free(buffIn);
- free(buffOut);
- }
- static char* createOutFilename_orDie(const char* filename)
- {
- size_t const inL = strlen(filename);
- size_t const outL = inL + 5;
- void* const outSpace = malloc_orDie(outL);
- memset(outSpace, 0, outL);
- strcat(outSpace, filename);
- strcat(outSpace, ".zst");
- return (char*)outSpace;
- }
- int main(int argc, const char** argv)
- {
- const char* const exeName = argv[0];
- if (argc!=2) {
- printf("wrong arguments\n");
- printf("usage:\n");
- printf("%s FILE\n", exeName);
- return 1;
- }
- const char* const inFilename = argv[1];
- char* const outFilename = createOutFilename_orDie(inFilename);
- compressFile_orDie(inFilename, outFilename, 1);
- free(outFilename); /* not strictly required, since program execution stops there,
- * but some static analyzer main complain otherwise */
- return 0;
- }
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