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- /*
- * 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 <sys/stat.h>
- #include <fcntl.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <zlib.h>
- #ifdef DEBUG
- #define dbgprintf printf
- #else
- #define dbgprintf(...)
- #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;
- if (argc < 3)
- {
- printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
- exit(1);
- }
- fd_in = open(argv[1], O_RDONLY);
- if (fd_in < 0)
- {
- perror("Error while opening: ");
- exit(1);
- }
- fd_out = open(argv[2], O_WRONLY|O_CREAT, 00644);
- if (fd_out < 0)
- {
- perror("Error while opening: ");
- close(fd_in);
- exit(1);
- }
- if (read(fd_in, &buf_in, 8) != 8)
- {
- printf("Header error\n");
- close(fd_in);
- close(fd_out);
- exit(1);
- }
- if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S')
- {
- printf("Not a compressed flash file\n");
- exit(1);
- }
- fstat(fd_in, &statbuf);
- 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';
- write(fd_out, &buf_in, 8);
- zstream.zalloc = NULL;
- zstream.zfree = NULL;
- zstream.opaque = NULL;
- inflateInit(&zstream);
- 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);
- exit(1);
- }
- 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);
- write(fd_out, &buf_out, zstream.total_out-last_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;
- lseek(fd_out, 4, SEEK_SET);
- write(fd_out, &buf_in, 4);
- }
- inflateEnd(&zstream);
- close(fd_in);
- close(fd_out);
- return 0;
- }
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