/*
- * upkg: tool for manipulating Unreal Tournament packages.
- * Copyright (C) 2009 Nick Bowler
+ * upkg: tool for manipulating Unreal Tournament packages.
+ * Copyright © 2009-2011, 2022 Nick Bowler
*
- * 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 3 of the License, or
- * (at your option) any later version.
+ * 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 3 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.
+ * 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, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
+#include <config.h>
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include "music-module.h"
#include "upkg.h"
struct music_mod {
struct upkg_file *f;
+
+ unsigned char header[64];
+ unsigned long hdrlen;
};
int music_mod_init(void)
struct music_mod *music_mod_open(struct upkg_file *f)
{
- struct music_mod *m = malloc(sizeof *m);
+ struct music_mod *m;
- if (m) {
- m->f = f;
+ m = malloc(sizeof *m);
+ if (!m) {
+ return NULL;
}
+ m->f = f;
+ m->hdrlen = upkg_export_read(f, m->header, sizeof m->header);
return m;
}
}
}
+int is_xm(unsigned char *buf, unsigned long len)
+{
+ static const char head[15] =
+ /* ASCII encoding of "Extended Module" */
+ "\x45\x78\x74\x65\x6e\x64\x65\x64\x20\x4d\x6f\x64\x75\x6c\x65";
+
+ if (len >= sizeof head && memcmp(head, buf, sizeof head) == 0)
+ return 1;
+ return 0;
+}
+
+int is_it(unsigned char *buf, unsigned long len)
+{
+ static const char head[4] =
+ /* ASCII encoding of "IMPM" */
+ "\x49\x4d\x50\x4d";
+
+ if (len >= sizeof head && memcmp(head, buf, sizeof head) == 0)
+ return 1;
+ return 0;
+}
+
+int is_s3m(unsigned char *buf, unsigned long len)
+{
+ static const char head[4] =
+ /* ASCII encoding of "SCRM" */
+ "\x53\x43\x52\x4d";
+
+ if (len < 0x2c + sizeof head)
+ return 0;
+ if (memcmp(head, buf+0x2c, sizeof head) == 0)
+ return 1;
+ return 0;
+}
+
const char *music_mod_type(struct music_mod *mod)
{
+ if (is_xm(mod->header, mod->hdrlen))
+ return "xm";
+ if (is_it(mod->header, mod->hdrlen))
+ return "it";
+ if (is_s3m(mod->header, mod->hdrlen))
+ return "s3m";
+
return "unknown";
}