23 #define dbgprintf printf
25 #define dbgprintf(...)
28 int main(
int argc,
char *argv[])
30 int fd_in, fd_out, comp_len, uncomp_len, i, last_out;
31 char buf_in[1024], buf_out[65536];
36 printf(
"Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
40 fd_in = open(argv[1], O_RDONLY);
42 perror(
"Error opening input file");
46 fd_out = open(argv[2], O_WRONLY | O_CREAT, 00644);
48 perror(
"Error opening output file");
53 if (read(fd_in, &buf_in, 8) != 8) {
54 printf(
"Header error\n");
60 if (buf_in[0] !=
'C' || buf_in[1] !=
'W' || buf_in[2] !=
'S') {
61 printf(
"Not a compressed flash file\n");
65 if (fstat(fd_in, &statbuf) < 0) {
66 perror(
"fstat failed");
69 comp_len = statbuf.st_size;
70 uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24);
72 printf(
"Compressed size: %d Uncompressed size: %d\n",
73 comp_len - 4, uncomp_len - 4);
77 if (write(fd_out, &buf_in, 8) < 8) {
78 perror(
"Error writing output file");
82 zstream.zalloc =
NULL;
84 zstream.opaque =
NULL;
85 if (inflateInit(&zstream) != Z_OK) {
86 fprintf(stderr,
"inflateInit failed\n");
90 for (i = 0; i < comp_len - 8;) {
91 int ret,
len = read(fd_in, &buf_in, 1024);
95 last_out = zstream.total_out;
97 zstream.next_in = &buf_in[0];
98 zstream.avail_in =
len;
99 zstream.next_out = &buf_out[0];
100 zstream.avail_out = 65536;
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);
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);
113 if (write(fd_out, &buf_out, zstream.total_out - last_out) <
114 zstream.total_out - last_out) {
115 perror(
"Error writing output file");
121 if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
125 if (zstream.total_out != uncomp_len - 8) {
126 printf(
"Size mismatch (%lu != %d), updating header...\n",
127 zstream.total_out, uncomp_len - 8);
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;
134 if ( lseek(fd_out, 4, SEEK_SET) < 0
135 || write(fd_out, &buf_in, 4) < 4) {
136 perror(
"Error writing output file");
141 inflateEnd(&zstream);