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// example4.c - Uses tinfl.c to decompress a zlib stream in memory to an output file
// 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>
#include <limits.h>
typedef unsigned char uint8;
typedef unsigned short uint16;
typedef unsigned int uint;
#define my_max(a,b) (((a) > (b)) ? (a) : (b))
#define my_min(a,b) (((a) < (b)) ? (a) : (b))
static int tinfl_put_buf_func(const void* pBuf, int len, void *pUser)
{
return len == (int)fwrite(pBuf, 1, len, (FILE*)pUser);
}
int main(int argc, char *argv[])
{
int status;
FILE *pInfile, *pOutfile;
uint infile_size, outfile_size;
size_t in_buf_size;
uint8 *pCmp_data;
long file_loc;
if (argc != 3)
{
printf("Usage: example4 infile outfile\n");
printf("Decompresses zlib stream in file infile to file outfile.\n");
printf("Input file must be able to fit entirely in memory.\n");
printf("example3 can be used to create compressed zlib streams.\n");
return EXIT_FAILURE;
}
// Open input file.
pInfile = fopen(argv[1], "rb");
if (!pInfile)
{
printf("Failed opening input file!\n");
return EXIT_FAILURE;
}
// Determine input file's size.
fseek(pInfile, 0, SEEK_END);
file_loc = ftell(pInfile);
fseek(pInfile, 0, SEEK_SET);
if ((file_loc < 0) || (file_loc > INT_MAX))
{
// This is not a limitation of miniz or tinfl, but this example.
printf("File is too large to be processed by this example.\n");
return EXIT_FAILURE;
}
infile_size = (uint)file_loc;
pCmp_data = (uint8 *)malloc(infile_size);
if (!pCmp_data)
{
printf("Out of memory!\n");
return EXIT_FAILURE;
}
if (fread(pCmp_data, 1, infile_size, pInfile) != infile_size)
{
printf("Failed reading input file!\n");
return EXIT_FAILURE;
}
// Open output file.
pOutfile = fopen(argv[2], "wb");
if (!pOutfile)
{
printf("Failed opening output file!\n");
return EXIT_FAILURE;
}
printf("Input file size: %u\n", infile_size);
in_buf_size = infile_size;
status = tinfl_decompress_mem_to_callback(pCmp_data, &in_buf_size, tinfl_put_buf_func, pOutfile, TINFL_FLAG_PARSE_ZLIB_HEADER);
if (!status)
{
printf("tinfl_decompress_mem_to_callback() failed with status %i!\n", status);
return EXIT_FAILURE;
}
outfile_size = ftell(pOutfile);
fclose(pInfile);
if (EOF == fclose(pOutfile))
{
printf("Failed writing to output file!\n");
return EXIT_FAILURE;
}
printf("Total input bytes: %u\n", (uint)in_buf_size);
printf("Total output bytes: %u\n", outfile_size);
printf("Success.\n");
return EXIT_SUCCESS;
}