firmware/common/misc.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Björn Stenberg
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include "config.h"
  22 #include "dir.h"
  23 #include "stdlib.h"
  24 #include "string.h"
  25
  26 #ifdef HAVE_MULTIVOLUME
  27 /* returns on which volume this is, and copies the reduced name
  28    (sortof a preprocessor for volume-decorated pathnames) */
  29 int strip_volume(const char* name, char* namecopy)
  30 {
  31     int volume = 0;
  32     const char *temp = name;
  33
  34     while (*temp == '/')          /* skip all leading slashes */
  35         ++temp;
  36
  37     if (*temp && !strncmp(temp, VOL_NAMES, VOL_ENUM_POS))
  38     {
  39         temp += VOL_ENUM_POS;     /* behind special name */
  40         volume = atoi(temp);      /* number is following */
  41         temp = strchr(temp, '/'); /* search for slash behind */
  42         if (temp != NULL)
  43             name = temp;          /* use the part behind the volume */
  44         else
  45             name = "/";           /* else this must be the root dir */
  46     }
  47
  48     strlcpy(namecopy, name, MAX_PATH);
  49
  50     return volume;
  51 }
  52 #endif /* #ifdef HAVE_MULTIVOLUME */