/* * 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(...)#endifint 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;}