148 lines
3.8 KiB
C
Executable file
148 lines
3.8 KiB
C
Executable file
/*
|
|
* cws2fws by Alex Beregszaszi
|
|
* This file is placed in the public domain.
|
|
* Use the program however you see fit.
|
|
*
|
|
* This utility converts compressed Macromedia Flash files to uncompressed ones.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#if HAVE_IO_H
|
|
#include <io.h>
|
|
#endif
|
|
#include <zlib.h>
|
|
|
|
#ifdef DEBUG
|
|
#define dbgprintf printf
|
|
#else
|
|
#define dbgprintf(...) do { if (0) printf(__VA_ARGS__); } while (0)
|
|
#endif
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int fd_in, fd_out, comp_len, uncomp_len, i, last_out;
|
|
char buf_in[1024], buf_out[65536];
|
|
z_stream zstream;
|
|
struct stat statbuf;
|
|
int ret = 1;
|
|
|
|
if (argc < 3) {
|
|
printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
fd_in = open(argv[1], O_RDONLY);
|
|
if (fd_in < 0) {
|
|
perror("Error opening input file");
|
|
return 1;
|
|
}
|
|
|
|
fd_out = open(argv[2], O_WRONLY | O_CREAT, 00644);
|
|
if (fd_out < 0) {
|
|
perror("Error opening output file");
|
|
close(fd_in);
|
|
return 1;
|
|
}
|
|
|
|
if (read(fd_in, &buf_in, 8) != 8) {
|
|
printf("Header error\n");
|
|
goto out;
|
|
}
|
|
|
|
if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S') {
|
|
printf("Not a compressed flash file\n");
|
|
goto out;
|
|
}
|
|
|
|
if (fstat(fd_in, &statbuf) < 0) {
|
|
perror("fstat failed");
|
|
return 1;
|
|
}
|
|
comp_len = statbuf.st_size;
|
|
uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24);
|
|
|
|
printf("Compressed size: %d Uncompressed size: %d\n",
|
|
comp_len - 4, uncomp_len - 4);
|
|
|
|
// write out modified header
|
|
buf_in[0] = 'F';
|
|
if (write(fd_out, &buf_in, 8) < 8) {
|
|
perror("Error writing output file");
|
|
goto out;
|
|
}
|
|
|
|
zstream.zalloc = NULL;
|
|
zstream.zfree = NULL;
|
|
zstream.opaque = NULL;
|
|
if (inflateInit(&zstream) != Z_OK) {
|
|
fprintf(stderr, "inflateInit failed\n");
|
|
return 1;
|
|
}
|
|
|
|
for (i = 0; i < comp_len - 8;) {
|
|
int ret, len = read(fd_in, &buf_in, 1024);
|
|
|
|
dbgprintf("read %d bytes\n", len);
|
|
|
|
last_out = zstream.total_out;
|
|
|
|
zstream.next_in = &buf_in[0];
|
|
zstream.avail_in = len;
|
|
zstream.next_out = &buf_out[0];
|
|
zstream.avail_out = 65536;
|
|
|
|
ret = inflate(&zstream, Z_SYNC_FLUSH);
|
|
if (ret != Z_STREAM_END && ret != Z_OK) {
|
|
printf("Error while decompressing: %d\n", ret);
|
|
inflateEnd(&zstream);
|
|
goto out;
|
|
}
|
|
|
|
dbgprintf("a_in: %d t_in: %lu a_out: %d t_out: %lu -- %lu out\n",
|
|
zstream.avail_in, zstream.total_in, zstream.avail_out,
|
|
zstream.total_out, zstream.total_out - last_out);
|
|
|
|
if (write(fd_out, &buf_out, zstream.total_out - last_out) <
|
|
zstream.total_out - last_out) {
|
|
perror("Error writing output file");
|
|
inflateEnd(&zstream);
|
|
goto out;
|
|
}
|
|
|
|
i += len;
|
|
|
|
if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
|
|
break;
|
|
}
|
|
|
|
if (zstream.total_out != uncomp_len - 8) {
|
|
printf("Size mismatch (%lu != %d), updating header...\n",
|
|
zstream.total_out, uncomp_len - 8);
|
|
|
|
buf_in[0] = (zstream.total_out + 8) & 0xff;
|
|
buf_in[1] = ((zstream.total_out + 8) >> 8) & 0xff;
|
|
buf_in[2] = ((zstream.total_out + 8) >> 16) & 0xff;
|
|
buf_in[3] = ((zstream.total_out + 8) >> 24) & 0xff;
|
|
|
|
if ( lseek(fd_out, 4, SEEK_SET) < 0
|
|
|| write(fd_out, &buf_in, 4) < 4) {
|
|
perror("Error writing output file");
|
|
inflateEnd(&zstream);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
inflateEnd(&zstream);
|
|
out:
|
|
close(fd_in);
|
|
close(fd_out);
|
|
return ret;
|
|
}
|