84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
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* \file roundtrip.c
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* In this example we include \c zstd.h and compile separately the amalgamated
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* \c zstd.c:
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* \code
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* cc -Wall -Wextra -Werror -I. -Os -g0 zstd.c examples/roundtrip.c
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* \endcode
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*
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* \author Carl Woffenden, Numfum GmbH (released under a CC0 license)
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "zstd.h"
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//************************** Test Data (DXT texture) **************************/
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/**
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* Raw test data (borrowed from the Emscripten example).
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* \n
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* See \c testcard.png for the original.
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*/
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static uint8_t const rawData[] = {
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#include "testcard-dxt1.inl"
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};
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#ifndef ZSTD_VERSION_MAJOR
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/*
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* For the case where the decompression library hasn't been included we add
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* dummy functions to fake the process and stop the buffers being optimised out.
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*/
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size_t ZSTD_compressBound(size_t maxSrc) {
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return maxSrc + 32;
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}
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int ZSTD_maxCLevel(void) {
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return 20;
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}
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size_t ZSTD_compress(void* dst, size_t dstLen, const void* src, size_t srcLen, int level) {
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return (memcmp(dst, src, (srcLen < dstLen) ? srcLen : dstLen)) ? level : dstLen;
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}
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unsigned ZSTD_isError(size_t code) {
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return ((int) code) < 0;
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}
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size_t ZSTD_decompress(void* dst, size_t dstLen, const void* src, size_t srcLen) {
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return (memcmp(dst, src, (srcLen < dstLen) ? srcLen : dstLen)) ? 0 : dstLen;
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}
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#endif
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//*****************************************************************************/
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/**
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* Simple single-file test to compress \c rawData, decompress the result, then
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* compare the decompressed version with the original.
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*/
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int main() {
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size_t bounds = ZSTD_compressBound(sizeof rawData);
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void* compBuf = malloc(bounds);
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void* testBuf = malloc(sizeof rawData);
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int compare = -1;
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if (compBuf && testBuf) {
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size_t compSize = ZSTD_compress(compBuf, bounds, rawData, sizeof rawData, ZSTD_maxCLevel());
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if (!ZSTD_isError(compSize)) {
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printf("Compression: PASSED (size: %lu, uncompressed: %lu)\n", (unsigned long) compSize, (unsigned long) (sizeof rawData));
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size_t decSize = ZSTD_decompress(testBuf, sizeof rawData, compBuf, compSize);
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if (!ZSTD_isError(decSize)) {
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printf("Decompression: PASSED\n");
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compare = memcmp(rawData, testBuf, decSize);
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printf("Byte comparison: %s\n", (compare == 0) ? "PASSED" : "FAILED");
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} else {
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printf("Decompression: FAILED\n");
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}
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} else {
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printf("Compression: FAILED\n");
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}
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free(compBuf);
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free(testBuf);
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}
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return (compare == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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