| 1 | /* |
| 2 | * \file roundtrip.c |
| 3 | * In this example we include \c zstd.h and compile separately the amalgamated |
| 4 | * \c zstd.c: |
| 5 | * \code |
| 6 | * cc -Wall -Wextra -Werror -I. -Os -g0 zstd.c examples/roundtrip.c |
| 7 | * \endcode |
| 8 | * |
| 9 | * \author Carl Woffenden, Numfum GmbH (released under a CC0 license) |
| 10 | */ |
| 11 | |
| 12 | #include <stddef.h> |
| 13 | #include <stdint.h> |
| 14 | #include <stdio.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <string.h> |
| 17 | |
| 18 | #include "zstd.h" |
| 19 | |
| 20 | //************************** Test Data (DXT texture) **************************/ |
| 21 | |
| 22 | /** |
| 23 | * Raw test data (borrowed from the Emscripten example). |
| 24 | * \n |
| 25 | * See \c testcard.png for the original. |
| 26 | */ |
| 27 | static uint8_t const rawData[] = { |
| 28 | #include "testcard-dxt1.inl" |
| 29 | }; |
| 30 | |
| 31 | #ifndef ZSTD_VERSION_MAJOR |
| 32 | /* |
| 33 | * For the case where the decompression library hasn't been included we add |
| 34 | * dummy functions to fake the process and stop the buffers being optimised out. |
| 35 | */ |
| 36 | size_t ZSTD_compressBound(size_t maxSrc) { |
| 37 | return maxSrc + 32; |
| 38 | } |
| 39 | int ZSTD_maxCLevel(void) { |
| 40 | return 20; |
| 41 | } |
| 42 | size_t ZSTD_compress(void* dst, size_t dstLen, const void* src, size_t srcLen, int level) { |
| 43 | return (memcmp(dst, src, (srcLen < dstLen) ? srcLen : dstLen)) ? level : dstLen; |
| 44 | } |
| 45 | unsigned ZSTD_isError(size_t code) { |
| 46 | return ((int) code) < 0; |
| 47 | } |
| 48 | size_t ZSTD_decompress(void* dst, size_t dstLen, const void* src, size_t srcLen) { |
| 49 | return (memcmp(dst, src, (srcLen < dstLen) ? srcLen : dstLen)) ? 0 : dstLen; |
| 50 | } |
| 51 | #endif |
| 52 | |
| 53 | //*****************************************************************************/ |
| 54 | |
| 55 | /** |
| 56 | * Simple single-file test to compress \c rawData, decompress the result, then |
| 57 | * compare the decompressed version with the original. |
| 58 | */ |
| 59 | int main() { |
| 60 | size_t bounds = ZSTD_compressBound(sizeof rawData); |
| 61 | void* compBuf = malloc(bounds); |
| 62 | void* testBuf = malloc(sizeof rawData); |
| 63 | int compare = -1; |
| 64 | if (compBuf && testBuf) { |
| 65 | size_t compSize = ZSTD_compress(compBuf, bounds, rawData, sizeof rawData, ZSTD_maxCLevel()); |
| 66 | if (!ZSTD_isError(compSize)) { |
| 67 | printf("Compression: PASSED (size: %lu, uncompressed: %lu)\n", (unsigned long) compSize, (unsigned long) (sizeof rawData)); |
| 68 | size_t decSize = ZSTD_decompress(testBuf, sizeof rawData, compBuf, compSize); |
| 69 | if (!ZSTD_isError(decSize)) { |
| 70 | printf("Decompression: PASSED\n"); |
| 71 | compare = memcmp(rawData, testBuf, decSize); |
| 72 | printf("Byte comparison: %s\n", (compare == 0) ? "PASSED" : "FAILED"); |
| 73 | } else { |
| 74 | printf("Decompression: FAILED\n"); |
| 75 | } |
| 76 | } else { |
| 77 | printf("Compression: FAILED\n"); |
| 78 | } |
| 79 | free(compBuf); |
| 80 | free(testBuf); |
| 81 | } |
| 82 | return (compare == 0) ? EXIT_SUCCESS : EXIT_FAILURE; |
| 83 | } |