| // 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; |
| } |