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