1 // example4.c - Uses tinfl.c to decompress a zlib stream in memory to an output file
2 // Public domain, May 15 2011, Rich Geldreich, richgel99@gmail.com. See "unlicense" statement at the end of tinfl.c.
3 #include "miniz_tinfl.h"
4 #include <stdio.h>
5 #include <limits.h>
6
7 typedef unsigned char uint8;
8 typedef unsigned short uint16;
9 typedef unsigned int uint;
10
11 #define my_max(a,b) (((a) > (b)) ? (a) : (b))
12 #define my_min(a,b) (((a) < (b)) ? (a) : (b))
13
tinfl_put_buf_func(const void * pBuf,int len,void * pUser)14 static int tinfl_put_buf_func(const void* pBuf, int len, void *pUser)
15 {
16 return len == (int)fwrite(pBuf, 1, len, (FILE*)pUser);
17 }
18
main(int argc,char * argv[])19 int main(int argc, char *argv[])
20 {
21 int status;
22 FILE *pInfile, *pOutfile;
23 uint infile_size, outfile_size;
24 size_t in_buf_size;
25 uint8 *pCmp_data;
26 long file_loc;
27
28 if (argc != 3)
29 {
30 printf("Usage: example4 infile outfile\n");
31 printf("Decompresses zlib stream in file infile to file outfile.\n");
32 printf("Input file must be able to fit entirely in memory.\n");
33 printf("example3 can be used to create compressed zlib streams.\n");
34 return EXIT_FAILURE;
35 }
36
37 // Open input file.
38 pInfile = fopen(argv[1], "rb");
39 if (!pInfile)
40 {
41 printf("Failed opening input file!\n");
42 return EXIT_FAILURE;
43 }
44
45 // Determine input file's size.
46 fseek(pInfile, 0, SEEK_END);
47 file_loc = ftell(pInfile);
48 fseek(pInfile, 0, SEEK_SET);
49
50 if ((file_loc < 0) || (file_loc > INT_MAX))
51 {
52 // This is not a limitation of miniz or tinfl, but this example.
53 printf("File is too large to be processed by this example.\n");
54 return EXIT_FAILURE;
55 }
56
57 infile_size = (uint)file_loc;
58
59 pCmp_data = (uint8 *)malloc(infile_size);
60 if (!pCmp_data)
61 {
62 printf("Out of memory!\n");
63 return EXIT_FAILURE;
64 }
65 if (fread(pCmp_data, 1, infile_size, pInfile) != infile_size)
66 {
67 printf("Failed reading input file!\n");
68 return EXIT_FAILURE;
69 }
70
71 // Open output file.
72 pOutfile = fopen(argv[2], "wb");
73 if (!pOutfile)
74 {
75 printf("Failed opening output file!\n");
76 return EXIT_FAILURE;
77 }
78
79 printf("Input file size: %u\n", infile_size);
80
81 in_buf_size = infile_size;
82 status = tinfl_decompress_mem_to_callback(pCmp_data, &in_buf_size, tinfl_put_buf_func, pOutfile, TINFL_FLAG_PARSE_ZLIB_HEADER);
83 if (!status)
84 {
85 printf("tinfl_decompress_mem_to_callback() failed with status %i!\n", status);
86 return EXIT_FAILURE;
87 }
88
89 outfile_size = ftell(pOutfile);
90
91 fclose(pInfile);
92 if (EOF == fclose(pOutfile))
93 {
94 printf("Failed writing to output file!\n");
95 return EXIT_FAILURE;
96 }
97
98 printf("Total input bytes: %u\n", (uint)in_buf_size);
99 printf("Total output bytes: %u\n", outfile_size);
100 printf("Success.\n");
101 return EXIT_SUCCESS;
102 }
103