103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
// 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_tinfl.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;
|
|
}
|