Move strip_volume() to filefuncs.c and set properties.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23767 a1c6a512-1295-4272-9138-f99709370657

firmware/common/filefuncs.c

@@ -0,0 +1,52 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Björn Stenberg
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include "dir.h"
+#include "stdlib.h"
+#include "string.h"
+
+#ifdef HAVE_MULTIVOLUME
+/* returns on which volume this is, and copies the reduced name
+   (sortof a preprocessor for volume-decorated pathnames) */
+int strip_volume(const char* name, char* namecopy)
+{
+    int volume = 0;
+    const char *temp = name;
+
+    while (*temp == '/')          /* skip all leading slashes */
+        ++temp;
+
+    if (*temp && !strncmp(temp, VOL_NAMES, VOL_ENUM_POS))
+    {
+        temp += VOL_ENUM_POS;     /* behind special name */
+        volume = atoi(temp);      /* number is following */
+        temp = strchr(temp, '/'); /* search for slash behind */
+        if (temp != NULL)
+            name = temp;          /* use the part behind the volume */
+        else
+            name = "/";           /* else this must be the root dir */
+    }
+
+    strlcpy(namecopy, name, MAX_PATH);
+
+    return volume;
+}
+#endif /* #ifdef HAVE_MULTIVOLUME */