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// Demonstrates miniz.c's compress() and uncompress() functions
// (same as zlib's). Public domain, May 15 2011, Rich Geldreich,
// richgel99@gmail.com. See "unlicense" statement at the end of tinfl.c.
#include <miniz.h>
#include <stdio.h>
typedef unsigned char uint8;
typedef unsigned short uint16;
typedef unsigned int uint;
// The string to compress.
static const char *s_pStr =
"Good morning Dr. Chandra. This is Hal. I am ready for my first lesson."
"Good morning Dr. Chandra. This is Hal. I am ready for my first lesson."
"Good morning Dr. Chandra. This is Hal. I am ready for my first lesson."
"Good morning Dr. Chandra. This is Hal. I am ready for my first lesson."
"Good morning Dr. Chandra. This is Hal. I am ready for my first lesson."
"Good morning Dr. Chandra. This is Hal. I am ready for my first lesson."
"Good morning Dr. Chandra. This is Hal. I am ready for my first lesson.";
int main(int argc, char *argv[]) {
uint step = 0;
int cmp_status;
uLong src_len = (uLong)strlen(s_pStr);
uLong uncomp_len = src_len;
uLong cmp_len;
uint8 *pCmp, *pUncomp;
size_t sz;
uint total_succeeded = 0;
(void)argc, (void)argv;
printf("miniz.c version: %s\n", MZ_VERSION);
do {
pCmp = (uint8 *)tdefl_compress_mem_to_heap(s_pStr, src_len, &cmp_len, 0);
if (!pCmp) {
printf("tdefl_compress_mem_to_heap failed\n");
return EXIT_FAILURE;
}
if (src_len <= cmp_len) {
printf("tdefl_compress_mem_to_heap failed: from %u to %u bytes\n",
(mz_uint32)uncomp_len, (mz_uint32)cmp_len);
free(pCmp);
return EXIT_FAILURE;
}
sz = tdefl_compress_mem_to_mem(pCmp, cmp_len, s_pStr, src_len, 0);
if (sz != cmp_len) {
printf("tdefl_compress_mem_to_mem failed: expected %u, got %u\n",
(mz_uint32)cmp_len, (mz_uint32)sz);
free(pCmp);
return EXIT_FAILURE;
}
// Allocate buffers to hold compressed and uncompressed data.
free(pCmp);
cmp_len = compressBound(src_len);
pCmp = (mz_uint8 *)malloc((size_t)cmp_len);
pUncomp = (mz_uint8 *)malloc((size_t)src_len);
if ((!pCmp) || (!pUncomp)) {
printf("Out of memory!\n");
return EXIT_FAILURE;
}
// Compress the string.
cmp_status =
compress(pCmp, &cmp_len, (const unsigned char *)s_pStr, src_len);
if (cmp_status != Z_OK) {
printf("compress() failed!\n");
free(pCmp);
free(pUncomp);
return EXIT_FAILURE;
}
printf("Compressed from %u to %u bytes\n", (mz_uint32)src_len,
(mz_uint32)cmp_len);
if (step) {
// Purposely corrupt the compressed data if fuzzy testing (this is a
// very crude fuzzy test).
uint n = 1 + (rand() % 3);
while (n--) {
uint i = rand() % cmp_len;
pCmp[i] ^= (rand() & 0xFF);
}
}
// Decompress.
cmp_status = uncompress(pUncomp, &uncomp_len, pCmp, cmp_len);
total_succeeded += (cmp_status == Z_OK);
if (step) {
printf("Simple fuzzy test: step %u total_succeeded: %u\n", step,
total_succeeded);
} else {
if (cmp_status != Z_OK) {
printf("uncompress failed!\n");
free(pCmp);
free(pUncomp);
return EXIT_FAILURE;
}
printf("Decompressed from %u to %u bytes\n", (mz_uint32)cmp_len,
(mz_uint32)uncomp_len);
// Ensure uncompress() returned the expected data.
if ((uncomp_len != src_len) ||
(memcmp(pUncomp, s_pStr, (size_t)src_len))) {
printf("Decompression failed!\n");
free(pCmp);
free(pUncomp);
return EXIT_FAILURE;
}
}
free(pCmp);
free(pUncomp);
step++;
// Keep on fuzzy testing if there's a non-empty command line.
} while (argc >= 2);
printf("Success.\n");
return EXIT_SUCCESS;
}
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