2 * cws2fws by Alex Beregszaszi
5 * This utility converts compressed Macromedia Flash files to uncompressed ones.
15 #define dbgprintf printf
20 main(int argc, char *argv[])
22 int fd_in, fd_out, comp_len, uncomp_len, tag, i, last_out;
23 char buf_in[1024], buf_out[65536];
29 printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
33 fd_in = open(argv[1], O_RDONLY);
36 perror("Error while opening: ");
40 fd_out = open(argv[2], O_WRONLY|O_CREAT, 00644);
43 perror("Error while opening: ");
48 if (read(fd_in, &buf_in, 8) != 8)
50 printf("Header error\n");
56 if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S')
58 printf("Not a compressed flash file\n");
62 fstat(fd_in, &statbuf);
63 comp_len = statbuf.st_size;
64 uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24);
66 printf("Compressed size: %d Uncompressed size: %d\n", comp_len-4, uncomp_len-4);
68 // write out modified header
70 write(fd_out, &buf_in, 8);
72 zstream.zalloc = NULL;
74 zstream.opaque = NULL;
75 inflateInit(&zstream);
77 for (i = 0; i < comp_len-8;)
79 int ret, len = read(fd_in, &buf_in, 1024);
81 dbgprintf("read %d bytes\n", len);
83 last_out = zstream.total_out;
85 zstream.next_in = &buf_in[0];
86 zstream.avail_in = len;
87 zstream.next_out = &buf_out[0];
88 zstream.avail_out = 65536;
90 ret = inflate(&zstream, Z_SYNC_FLUSH);
91 if (ret != Z_STREAM_END && ret != Z_OK)
93 printf("Error while decompressing: %d\n", ret);
98 dbgprintf("a_in: %d t_in: %d a_out: %d t_out: %d -- %d out\n",
99 zstream.avail_in, zstream.total_in, zstream.avail_out, zstream.total_out,
100 zstream.total_out-last_out);
102 write(fd_out, &buf_out, zstream.total_out-last_out);
106 if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
110 if (zstream.total_out != uncomp_len-8)
112 printf("Size mismatch (%d != %d), updating header...\n",
113 zstream.total_out, uncomp_len-8);
115 buf_in[0] = (zstream.total_out+8) & 0xff;
116 buf_in[1] = (zstream.total_out+8 >> 8) & 0xff;
117 buf_in[2] = (zstream.total_out+8 >> 16) & 0xff;
118 buf_in[3] = (zstream.total_out+8 >> 24) & 0xff;
120 lseek(fd_out, 4, SEEK_SET);
121 write(fd_out, &buf_in, 4);
124 inflateEnd(&zstream);