Commit | Line | Data |
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2ba45a60 DM |
1 | /* |
2 | * cws2fws by Alex Beregszaszi | |
3 | * This file is placed in the public domain. | |
4 | * Use the program however you see fit. | |
5 | * | |
6 | * This utility converts compressed Macromedia Flash files to uncompressed ones. | |
7 | */ | |
8 | ||
9 | #include "config.h" | |
10 | #include <sys/stat.h> | |
11 | #include <fcntl.h> | |
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #if HAVE_UNISTD_H | |
15 | #include <unistd.h> | |
16 | #endif | |
17 | #if HAVE_IO_H | |
18 | #include <io.h> | |
19 | #endif | |
20 | #include <zlib.h> | |
21 | ||
22 | #ifdef DEBUG | |
23 | #define dbgprintf printf | |
24 | #else | |
25 | #define dbgprintf(...) | |
26 | #endif | |
27 | ||
28 | int main(int argc, char *argv[]) | |
29 | { | |
30 | int fd_in, fd_out, comp_len, uncomp_len, i, last_out; | |
31 | char buf_in[1024], buf_out[65536]; | |
32 | z_stream zstream; | |
33 | struct stat statbuf; | |
34 | ||
35 | if (argc < 3) { | |
36 | printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]); | |
37 | return 1; | |
38 | } | |
39 | ||
40 | fd_in = open(argv[1], O_RDONLY); | |
41 | if (fd_in < 0) { | |
42 | perror("Error opening input file"); | |
43 | return 1; | |
44 | } | |
45 | ||
46 | fd_out = open(argv[2], O_WRONLY | O_CREAT, 00644); | |
47 | if (fd_out < 0) { | |
48 | perror("Error opening output file"); | |
49 | close(fd_in); | |
50 | return 1; | |
51 | } | |
52 | ||
53 | if (read(fd_in, &buf_in, 8) != 8) { | |
54 | printf("Header error\n"); | |
55 | close(fd_in); | |
56 | close(fd_out); | |
57 | return 1; | |
58 | } | |
59 | ||
60 | if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S') { | |
61 | printf("Not a compressed flash file\n"); | |
62 | return 1; | |
63 | } | |
64 | ||
65 | if (fstat(fd_in, &statbuf) < 0) { | |
66 | perror("fstat failed"); | |
67 | return 1; | |
68 | } | |
69 | comp_len = statbuf.st_size; | |
70 | uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24); | |
71 | ||
72 | printf("Compressed size: %d Uncompressed size: %d\n", | |
73 | comp_len - 4, uncomp_len - 4); | |
74 | ||
75 | // write out modified header | |
76 | buf_in[0] = 'F'; | |
77 | if (write(fd_out, &buf_in, 8) < 8) { | |
78 | perror("Error writing output file"); | |
79 | return 1; | |
80 | } | |
81 | ||
82 | zstream.zalloc = NULL; | |
83 | zstream.zfree = NULL; | |
84 | zstream.opaque = NULL; | |
85 | if (inflateInit(&zstream) != Z_OK) { | |
86 | fprintf(stderr, "inflateInit failed\n"); | |
87 | return 1; | |
88 | } | |
89 | ||
90 | for (i = 0; i < comp_len - 8;) { | |
91 | int ret, len = read(fd_in, &buf_in, 1024); | |
92 | ||
93 | dbgprintf("read %d bytes\n", len); | |
94 | ||
95 | last_out = zstream.total_out; | |
96 | ||
97 | zstream.next_in = &buf_in[0]; | |
98 | zstream.avail_in = len; | |
99 | zstream.next_out = &buf_out[0]; | |
100 | zstream.avail_out = 65536; | |
101 | ||
102 | ret = inflate(&zstream, Z_SYNC_FLUSH); | |
103 | if (ret != Z_STREAM_END && ret != Z_OK) { | |
104 | printf("Error while decompressing: %d\n", ret); | |
105 | inflateEnd(&zstream); | |
106 | return 1; | |
107 | } | |
108 | ||
109 | dbgprintf("a_in: %d t_in: %lu a_out: %d t_out: %lu -- %lu out\n", | |
110 | zstream.avail_in, zstream.total_in, zstream.avail_out, | |
111 | zstream.total_out, zstream.total_out - last_out); | |
112 | ||
113 | if (write(fd_out, &buf_out, zstream.total_out - last_out) < | |
114 | zstream.total_out - last_out) { | |
115 | perror("Error writing output file"); | |
116 | return 1; | |
117 | } | |
118 | ||
119 | i += len; | |
120 | ||
121 | if (ret == Z_STREAM_END || ret == Z_BUF_ERROR) | |
122 | break; | |
123 | } | |
124 | ||
125 | if (zstream.total_out != uncomp_len - 8) { | |
126 | printf("Size mismatch (%lu != %d), updating header...\n", | |
127 | zstream.total_out, uncomp_len - 8); | |
128 | ||
129 | buf_in[0] = (zstream.total_out + 8) & 0xff; | |
130 | buf_in[1] = ((zstream.total_out + 8) >> 8) & 0xff; | |
131 | buf_in[2] = ((zstream.total_out + 8) >> 16) & 0xff; | |
132 | buf_in[3] = ((zstream.total_out + 8) >> 24) & 0xff; | |
133 | ||
134 | if ( lseek(fd_out, 4, SEEK_SET) < 0 | |
135 | || write(fd_out, &buf_in, 4) < 4) { | |
136 | perror("Error writing output file"); | |
137 | return 1; | |
138 | } | |
139 | } | |
140 | ||
141 | inflateEnd(&zstream); | |
142 | close(fd_in); | |
143 | close(fd_out); | |
144 | return 0; | |
145 | } |