103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
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// example4.c - Uses tinfl.c to decompress a zlib stream in memory to an output file
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// Public domain, May 15 2011, Rich Geldreich, richgel99@gmail.com. See "unlicense" statement at the end of tinfl.c.
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#include "miniz_tinfl.h"
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#include <stdio.h>
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#include <limits.h>
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typedef unsigned char uint8;
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typedef unsigned short uint16;
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typedef unsigned int uint;
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#define my_max(a,b) (((a) > (b)) ? (a) : (b))
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#define my_min(a,b) (((a) < (b)) ? (a) : (b))
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static int tinfl_put_buf_func(const void* pBuf, int len, void *pUser)
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{
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return len == (int)fwrite(pBuf, 1, len, (FILE*)pUser);
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}
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int main(int argc, char *argv[])
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{
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int status;
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FILE *pInfile, *pOutfile;
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uint infile_size, outfile_size;
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size_t in_buf_size;
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uint8 *pCmp_data;
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long file_loc;
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if (argc != 3)
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{
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printf("Usage: example4 infile outfile\n");
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printf("Decompresses zlib stream in file infile to file outfile.\n");
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printf("Input file must be able to fit entirely in memory.\n");
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printf("example3 can be used to create compressed zlib streams.\n");
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return EXIT_FAILURE;
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}
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// Open input file.
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pInfile = fopen(argv[1], "rb");
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if (!pInfile)
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{
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printf("Failed opening input file!\n");
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return EXIT_FAILURE;
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}
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// Determine input file's size.
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fseek(pInfile, 0, SEEK_END);
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file_loc = ftell(pInfile);
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fseek(pInfile, 0, SEEK_SET);
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if ((file_loc < 0) || (file_loc > INT_MAX))
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{
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// This is not a limitation of miniz or tinfl, but this example.
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printf("File is too large to be processed by this example.\n");
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return EXIT_FAILURE;
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}
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infile_size = (uint)file_loc;
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pCmp_data = (uint8 *)malloc(infile_size);
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if (!pCmp_data)
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{
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printf("Out of memory!\n");
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return EXIT_FAILURE;
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}
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if (fread(pCmp_data, 1, infile_size, pInfile) != infile_size)
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{
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printf("Failed reading input file!\n");
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return EXIT_FAILURE;
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}
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// Open output file.
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pOutfile = fopen(argv[2], "wb");
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if (!pOutfile)
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{
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printf("Failed opening output file!\n");
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return EXIT_FAILURE;
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}
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printf("Input file size: %u\n", infile_size);
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in_buf_size = infile_size;
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status = tinfl_decompress_mem_to_callback(pCmp_data, &in_buf_size, tinfl_put_buf_func, pOutfile, TINFL_FLAG_PARSE_ZLIB_HEADER);
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if (!status)
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{
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printf("tinfl_decompress_mem_to_callback() failed with status %i!\n", status);
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return EXIT_FAILURE;
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}
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outfile_size = ftell(pOutfile);
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fclose(pInfile);
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if (EOF == fclose(pOutfile))
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{
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printf("Failed writing to output file!\n");
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return EXIT_FAILURE;
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}
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printf("Total input bytes: %u\n", (uint)in_buf_size);
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printf("Total output bytes: %u\n", outfile_size);
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printf("Success.\n");
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return EXIT_SUCCESS;
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}
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