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Tags: upstream-0.7.2.final
Import upstream version 0.7.2.final

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src/playlist/group.c
 
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/*****************************************************************************
 
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 * playlist.c : Playlist groups management functions
 
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 *****************************************************************************
 
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 * Copyright (C) 1999-2004 VideoLAN
 
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 * $Id: group.c 7209 2004-03-31 20:52:31Z gbazin $
 
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 *
 
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 * Authors: Cl�ment Stenac <zorglub@videolan.org>
 
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 *
 
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 * This program is free software; you can redistribute it and/or modify
 
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 * it under the terms of the GNU General Public License as published by
 
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 * the Free Software Foundation; either version 2 of the License, or
 
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 * (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program; if not, write to the Free Software
 
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 
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 *****************************************************************************/
 
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#include <stdlib.h>                                      /* free(), strtol() */
 
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#include <stdio.h>                                              /* sprintf() */
 
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#include <string.h>                                            /* strerror() */
 
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#include <vlc/vlc.h>
 
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#include <vlc/input.h>
 
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#include "vlc_playlist.h"
 
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/**
 
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 * Create a group
 
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 *
 
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 * Create a new group
 
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 * \param p_playlist pointer to a playlist
 
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 * \param psz_name the name of the group to be created
 
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 * \return a pointer to the created group, or NULL on error
 
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 */
 
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playlist_group_t *playlist_CreateGroup( playlist_t *p_playlist, char *psz_name)
 
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{
 
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    playlist_group_t *p_group;
 
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    int i;
 
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    for( i = 0 ; i < p_playlist->i_groups; i++ )
 
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    {
 
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        if( !strcasecmp( p_playlist->pp_groups[i]->psz_name , psz_name ) )
 
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        {
 
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            msg_Info( p_playlist, "this group already exists");
 
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            return p_playlist->pp_groups[i];
 
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        }
 
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    }
 
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    /* Allocate the group structure */
 
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    if( ( p_group = malloc( sizeof(playlist_group_t) ) ) == NULL )
 
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    {
 
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        msg_Err( p_playlist, "out of memory" );
 
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        return NULL;
 
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    }
 
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    p_group->psz_name = strdup( psz_name );
 
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    p_group->i_id = ++p_playlist->i_last_group;
 
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    msg_Dbg(p_playlist,"creating group %s with id %i at position %i",
 
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                     p_group->psz_name,
 
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                     p_group->i_id,
 
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                     p_playlist->i_groups);
 
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    INSERT_ELEM ( p_playlist->pp_groups,
 
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                  p_playlist->i_groups,
 
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                  p_playlist->i_groups,
 
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                  p_group );
 
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    return p_group;
 
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}
 
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/**
 
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 * Destroy a group
 
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 *
 
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 * \param p_playlist the playlist to remove the group from
 
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 * \param i_id the identifier of the group to remove
 
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 * \return VLC_SUCCESS
 
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 */
 
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int playlist_DeleteGroup( playlist_t *p_playlist, int i_id )
 
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{
 
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    int i;
 
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    for( i=0 ; i<= p_playlist->i_groups; i++ )
 
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    {
 
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        playlist_group_t *p_group = p_playlist->pp_groups[i];
 
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        if( p_group->i_id == i_id )
 
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        {
 
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            if( p_group->psz_name )
 
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            {
 
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                free( p_group->psz_name );
 
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            }
 
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            REMOVE_ELEM( p_playlist->pp_groups,
 
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                         p_playlist->i_groups,
 
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                         i );
 
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            free( p_group );
 
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            return VLC_SUCCESS;
 
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        }
 
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    }
 
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    return VLC_SUCCESS;
 
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}
 
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/**
 
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 * Find the name of the group given its ID
 
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 *
 
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 * \param p_playlist the playlist where to find the group
 
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 * \param i_id the ID to search for
 
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 * \return the name of the group
 
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 */
 
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char *playlist_FindGroup( playlist_t *p_playlist, int i_id )
 
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{
 
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    int i;
 
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    for( i=0 ; i< p_playlist->i_groups; i++ )
 
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    {
 
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        if( p_playlist->pp_groups[i]->i_id == i_id )
 
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        {
 
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            if( p_playlist->pp_groups[i]->psz_name)
 
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                return strdup( p_playlist->pp_groups[i]->psz_name );
 
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        }
 
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    }
 
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    return NULL;
 
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}
 
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/**
 
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 * Find the id of a group given its name
 
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 *
 
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 * \param p_playlist the playlist where to find the group
 
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 * \param psz_name the name to search for
 
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 * \return the id of the group
 
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 */
 
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int playlist_GroupToId( playlist_t *p_playlist, char *psz_name )
 
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{
 
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    int i;
 
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    for( i = 0 ; i< p_playlist->i_groups; i++ )
 
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    {
 
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        if( p_playlist->pp_groups[i]->psz_name)
 
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        {
 
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            if( ! strcasecmp( p_playlist->pp_groups[i]->psz_name, psz_name ) )
 
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            {
 
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                return p_playlist->pp_groups[i]->i_id;
 
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            }
 
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        }
 
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    }
 
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    return VLC_SUCCESS;
 
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}