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Makefile
(2.77 KB)
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README.md
(1.85 KB)
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common.h
(6.97 KB)
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dictionary_compression.c
(3.16 KB)
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dictionary_decompression.c
(3.67 KB)
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multiple_simple_compression.c
(3.69 KB)
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multiple_streaming_compression.c
(4.35 KB)
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simple_compression.c
(2.01 KB)
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simple_decompression.c
(2.26 KB)
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streaming_compression.c
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streaming_compression_thread_pool.c
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streaming_decompression.c
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streaming_memory_usage.c
(5.7 KB)
Editing: simple_decompression.c
/* * Copyright (c) 2016-2020, 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 <stdio.h> // printf #include <stdlib.h> // free #include <zstd.h> // presumes zstd library is installed #include "common.h" // Helper functions, CHECK(), and CHECK_ZSTD() static void decompress(const char* fname) { size_t cSize; void* const cBuff = mallocAndLoadFile_orDie(fname, &cSize); /* Read the content size from the frame header. For simplicity we require * that it is always present. By default, zstd will write the content size * in the header when it is known. If you can't guarantee that the frame * content size is always written into the header, either use streaming * decompression, or ZSTD_decompressBound(). */ unsigned long long const rSize = ZSTD_getFrameContentSize(cBuff, cSize); CHECK(rSize != ZSTD_CONTENTSIZE_ERROR, "%s: not compressed by zstd!", fname); CHECK(rSize != ZSTD_CONTENTSIZE_UNKNOWN, "%s: original size unknown!", fname); void* const rBuff = malloc_orDie((size_t)rSize); /* Decompress. * If you are doing many decompressions, you may want to reuse the context * and use ZSTD_decompressDCtx(). If you want to set advanced parameters, * use ZSTD_DCtx_setParameter(). */ size_t const dSize = ZSTD_decompress(rBuff, rSize, cBuff, cSize); CHECK_ZSTD(dSize); /* When zstd knows the content size, it will error if it doesn't match. */ CHECK(dSize == rSize, "Impossible because zstd will check this condition!"); /* success */ printf("%25s : %6u -> %7u \n", fname, (unsigned)cSize, (unsigned)rSize); free(rBuff); free(cBuff); } 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; } decompress(argv[1]); printf("%s correctly decoded (in memory). \n", argv[1]); return 0; }
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