Package: dynamite
Version: 0.1.1-1
Severity: wishlist
Hi Evgeni,
please find attached a source code file by Hans de Goede (CC:ed) of Red Hat
fame. It allows for extraction of custom id software archives, which contain
some custom headers and then the actual files compressed using dynamite
compression. It was originally created for extracting the data files of
commander keen shareware (for something similar to game-data-packager under
Fedora), but it works with wolf3d's shareware .shr file too.
It just needs to get compiled and linked against -ldynamite. The file name for
the resulting binary should probably get called dynamite-shr or similar.
I can provide an NMU patch for your convenience, if you mind.
Bonus points for getting this integrated upstream. :)
Cheers,
Fabian
-- System Information:
Debian Release: 6.0
APT prefers unstable
APT policy: (501, 'unstable'), (101, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.32-5-686 (SMP w/1 CPU core)
Locale: LANG=de_DE.utf8, LC_CTYPE=de_DE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages dynamite depends on:
ii libc6 2.11.2-7 Embedded GNU C Library: Shared lib
ii libdynamite0 0.1.1-1 libraries for PKWARE Data Compress
dynamite recommends no packages.
dynamite suggests no packages.
/* utility to extract the .SHR installer data files of early ID software
shareware games
Copyright (C) 2007 Hans de Goede <j.w.r.dego...@hhs.nl>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <libdynamite.h>
struct cookie_s {
char *in_buffer;
int in_buffer_remaining;
int in_buffer_index;
int in_buffer_size;
FILE* out_file;
};
size_t reader(void* buffer, size_t size, void* cookie)
{
struct cookie_s *c = cookie;
if (size > c->in_buffer_remaining)
size = c->in_buffer_remaining;
memcpy (buffer, c->in_buffer + c->in_buffer_index, size);
c->in_buffer_index += size;
c->in_buffer_remaining -= size;
return size;
}
size_t writer(void* buffer, size_t size, void* cookie)
{
struct cookie_s *c = cookie;
return fwrite(buffer, 1, size, c->out_file);
}
int main(int argc, char *argv[])
{
struct cookie_s cookie;
FILE *in_file;
char filename[16];
unsigned char buf[4];
int i, compressed_size;
if (argc != 2) {
fprintf(stderr, "%s: Usage: %s <filename.CHR> %d\n", argv[0], argv[0], argc);
return 1;
}
in_file = fopen(argv[1], "r");
if (!in_file) {
fprintf(stderr, "error opening: %s", argv[1]);
perror(NULL);
return 1;
}
/* skip first 0x3A bytes header */
if (fseek(in_file, 0x3A, SEEK_CUR)) {
perror("error skipping initial file header");
return 1;
}
cookie.in_buffer = malloc(65536);
if (!cookie.in_buffer) {
fprintf(stderr, "Error: out of memory\n");
return 1;
}
cookie.in_buffer_size = 65536;
while (1)
{
/* get the name of the file */
if (fread(filename, 1, sizeof(filename), in_file) != sizeof(filename)) {
if (feof(in_file)) {
free(cookie.in_buffer);
fclose(in_file);
return 0; /* done */
}
perror("error getting output filename from file");
return 1;
}
/* verify the filename and convert to lower case */
for (i = 0 ; i < sizeof(filename); i++) {
if (filename[i] == 0)
break; /* done */
if (!isprint(filename[i])) {
fprintf(stderr, "error invalid output filename\n");
return 1;
}
filename[i] = tolower(filename[i]);
}
if (i == sizeof(filename)) {
fprintf(stderr, "error too long output filename\n");
return 1;
}
/* seek to compressed size */
if (fseek(in_file, 0x88 - sizeof(filename), SEEK_CUR)) {
perror("error skipping file header before file size");
return 1;
}
if (fread(buf, 1, 4, in_file) != 4) {
perror("error reading file size");
return 1;
}
compressed_size = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
if (compressed_size > cookie.in_buffer_size) {
cookie.in_buffer = realloc(cookie.in_buffer, compressed_size);
if (!cookie.in_buffer) {
fprintf(stderr, "Error: out of memory\n");
return 1;
}
cookie.in_buffer_size = compressed_size;
}
/* seek to begin of compressed data */
if (fseek(in_file, 0x1C, SEEK_CUR)) {
perror("error skipping file header before file size");
return 1;
}
/* read compressed data */
if (fread(cookie.in_buffer, 1, compressed_size, in_file) !=
compressed_size) {
perror("error reading compressed data");
return 1;
}
cookie.in_buffer_index = 0;
cookie.in_buffer_remaining = compressed_size;
cookie.out_file = fopen(filename, "w");
if (!cookie.out_file) {
fprintf(stderr, "Error creating: %s for writing", filename);
perror(NULL);
return 1;
}
printf("decompressing: %s, compressed size: %d\n", filename,
compressed_size);
if ((i = dynamite_explode(reader, writer, &cookie))) {
fprintf(stderr, "Error: %d while decompressing\n", i);
return i;
}
fclose(cookie.out_file);
}
/* never reached */
return 0;
}
