69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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#include <stdio.h> // printf
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#include <stdlib.h> // free
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#include <string.h> // strlen, strcat, memset
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#include <zstd.h> // presumes zstd library is installed
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#include "common.h" // Helper functions, CHECK(), and CHECK_ZSTD()
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static void compress_orDie(const char* fname, const char* oname)
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{
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size_t fSize;
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void* const fBuff = mallocAndLoadFile_orDie(fname, &fSize);
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size_t const cBuffSize = ZSTD_compressBound(fSize);
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void* const cBuff = malloc_orDie(cBuffSize);
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/* Compress.
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* If you are doing many compressions, you may want to reuse the context.
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* See the multiple_simple_compression.c example.
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*/
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size_t const cSize = ZSTD_compress(cBuff, cBuffSize, fBuff, fSize, 1);
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CHECK_ZSTD(cSize);
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saveFile_orDie(oname, cBuff, cSize);
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/* success */
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printf("%25s : %6u -> %7u - %s \n", fname, (unsigned)fSize, (unsigned)cSize, oname);
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free(fBuff);
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free(cBuff);
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}
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static char* createOutFilename_orDie(const char* filename)
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{
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size_t const inL = strlen(filename);
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size_t const outL = inL + 5;
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void* const outSpace = malloc_orDie(outL);
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memset(outSpace, 0, outL);
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strcat(outSpace, filename);
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strcat(outSpace, ".zst");
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return (char*)outSpace;
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}
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int main(int argc, const char** argv)
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{
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const char* const exeName = argv[0];
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if (argc!=2) {
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printf("wrong arguments\n");
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printf("usage:\n");
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printf("%s FILE\n", exeName);
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return 1;
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}
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const char* const inFilename = argv[1];
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char* const outFilename = createOutFilename_orDie(inFilename);
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compress_orDie(inFilename, outFilename);
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free(outFilename);
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return 0;
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}
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