git.sesse.net Git - vlc/blob - src/playlist/group.c

   1 /*****************************************************************************
   2  * playlist.c : Playlist groups management functions
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23 #include <stdlib.h>                                      /* free(), strtol() */
  24 #include <stdio.h>                                              /* sprintf() */
  25 #include <string.h>                                            /* strerror() */
  26
  27 #include <vlc/vlc.h>
  28 #include <vlc/input.h>
  29
  30 #include "vlc_playlist.h"
  31
  32 /**
  33  * Create a group
  34  *
  35  * Create a new group
  36  * \param p_playlist pointer to a playlist
  37  * \param psz_name the name of the group to be created
  38  * \return a pointer to the created group, or NULL on error
  39  */
  40 playlist_group_t *playlist_CreateGroup( playlist_t *p_playlist, char *psz_name)
  41 {
  42     playlist_group_t *p_group;
  43     int i;
  44
  45     for( i = 0 ; i < p_playlist->i_groups; i++ )
  46     {
  47         if( !strcasecmp( p_playlist->pp_groups[i]->psz_name , psz_name ) )
  48         {
  49             msg_Info( p_playlist, "this group already exists");
  50             return p_playlist->pp_groups[i];
  51         }
  52     }
  53
  54     /* Allocate the group structure */
  55     if( ( p_group = malloc( sizeof(playlist_group_t) ) ) == NULL )
  56     {
  57         msg_Err( p_playlist, "out of memory" );
  58         return NULL;
  59     }
  60
  61     p_group->psz_name = strdup( psz_name );
  62     p_group->i_id = ++p_playlist->i_last_group;
  63
  64     msg_Dbg(p_playlist,"creating group %s with id %i at position %i",
  65                      p_group->psz_name,
  66                      p_group->i_id,
  67                      p_playlist->i_groups);
  68
  69     INSERT_ELEM ( p_playlist->pp_groups,
  70                   p_playlist->i_groups,
  71                   p_playlist->i_groups,
  72                   p_group );
  73
  74     return p_group;
  75 }
  76
  77 /**
  78  * Destroy a group
  79  *
  80  * \param p_playlist the playlist to remove the group from
  81  * \param i_id the identifier of the group to remove
  82  * \return VLC_SUCCESS
  83  */
  84 int playlist_DeleteGroup( playlist_t *p_playlist, int i_id )
  85 {
  86     int i;
  87
  88     for( i=0 ; i<= p_playlist->i_groups; i++ )
  89     {
  90         playlist_group_t *p_group = p_playlist->pp_groups[i];
  91
  92         if( p_group->i_id == i_id )
  93         {
  94
  95             if( p_group->psz_name )
  96             {
  97                 free( p_group->psz_name );
  98             }
  99             REMOVE_ELEM( p_playlist->pp_groups,
 100                          p_playlist->i_groups,
 101                          i );
 102             free( p_group );
 103
 104             return VLC_SUCCESS;
 105         }
 106     }
 107     return VLC_SUCCESS;
 108 }
 109
 110 /**
 111  * Find the name of the group given its ID
 112  *
 113  * \param p_playlist the playlist where to find the group
 114  * \param i_id the ID to search for
 115  * \return the name of the group
 116  */
 117 char *playlist_FindGroup( playlist_t *p_playlist, int i_id )
 118 {
 119     int i;
 120     for( i=0 ; i< p_playlist->i_groups; i++ )
 121     {
 122         if( p_playlist->pp_groups[i]->i_id == i_id )
 123         {
 124             if( p_playlist->pp_groups[i]->psz_name)
 125                 return strdup( p_playlist->pp_groups[i]->psz_name );
 126         }
 127     }
 128     return NULL;
 129 }
 130
 131 /**
 132  * Find the id of a group given its name
 133  *
 134  * \param p_playlist the playlist where to find the group
 135  * \param psz_name the name to search for
 136  * \return the id of the group
 137  */
 138 int playlist_GroupToId( playlist_t *p_playlist, char *psz_name )
 139 {
 140     int i;
 141     for( i = 0 ; i< p_playlist->i_groups; i++ )
 142     {
 143         if( p_playlist->pp_groups[i]->psz_name)
 144         {
 145             if( ! strcasecmp( p_playlist->pp_groups[i]->psz_name, psz_name ) )
 146             {
 147                 return p_playlist->pp_groups[i]->i_id;
 148             }
 149         }
 150     }
 151     return VLC_SUCCESS;
 152 }