648db22b |
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 | } |