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VLC Source 0.5.3.dmg
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input_info.c
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2002-11-27
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/*****************************************************************************
* input_info.c: Convenient functions to handle the input info structures
*****************************************************************************
* Copyright (C) 1998-2001 VideoLAN
* $Id: input_info.c,v 1.9 2002/11/11 14:39:12 sam Exp $
*
* Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
*
* 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 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <vlc/vlc.h>
#include "stream_control.h"
#include "input_ext-intf.h"
#include "interface.h"
/**
* \brief Find info category by name.
*
* Returns a pointer to the info category with the given name, and
* creates it if necessary
*
* \param p_input pointer to the input thread in which the info is to be found
* \param psz_name the name of the category to be found
* \returns a pointer to the category with the given name
*/
input_info_category_t * input_InfoCategory( input_thread_t * p_input,
char * psz_name)
{
input_info_category_t * p_category, * p_prev;
p_prev = NULL;
for ( p_category = p_input->stream.p_info;
(p_category != NULL) && strcmp( p_category->psz_name, psz_name );
p_category = p_category->p_next)
{
p_prev = p_category;
}
if ( p_category )
{
return p_category;
}
else
{
p_category = malloc( sizeof( input_info_category_t ) );
if ( !p_category )
{
msg_Err( p_input, "No mem" );
return NULL;
}
p_category->psz_name = strdup( psz_name );
p_category->p_next = NULL;
p_category->p_info = NULL;
p_prev->p_next = p_category;
return p_category;
}
}
/**
* \brief Add a info item to a category
*
* \param p_category Pointer to the category to put this info in
* \param psz_name Name of the info item to add
* \param psz_format printf style format string for the value.
* \return a negative number on error. 0 on success.
*/
int input_AddInfo( input_info_category_t * p_category, char * psz_name,
char * psz_format, ...)
{
input_info_t * p_info, * p_prev;
char * psz_str = NULL;
va_list args;
p_prev = NULL;
if ( !p_category )
{
return -1;
}
va_start( args, psz_format );
/*
* Convert message to string
*/
#if defined(HAVE_VASPRINTF) && !defined(SYS_DARWIN)
vasprintf( &psz_str, psz_format, args );
#else
psz_str = (char*) malloc( strlen(psz_format) + INTF_MAX_MSG_SIZE );
if( psz_str == NULL )
{
return -1;
}
vsprintf( psz_str, psz_format, args );
#endif
va_end( args );
p_info = p_category->p_info;
while ( p_info )
{
p_prev = p_info;
p_info = p_info->p_next;
}
p_info = malloc( sizeof( input_info_t ) );
if( !p_info )
{
return -1;
}
p_info->psz_name = strdup( psz_name );
p_info->psz_value = psz_str;
p_info->p_next = NULL;
if ( p_prev )
{
p_prev->p_next = p_info;
}
else
{
p_category->p_info = p_info;
}
return 0;
}
/**
* \brief Destroy info structures
* \internal
*
* \param p_input The input thread to be cleaned for info
* \returns for the moment 0
*/
int input_DelInfo( input_thread_t * p_input )
{
input_info_category_t * p_category, * p_prev_category;
input_info_t * p_info, * p_prev_info;
p_category = p_input->stream.p_info;
while ( p_category )
{
p_info = p_category->p_info;
while ( p_info )
{
if ( p_info->psz_name )
{
free( p_info->psz_name );
}
if ( p_info->psz_value )
{
free( p_info->psz_value );
}
p_prev_info = p_info;
p_info = p_info->p_next;
free( p_prev_info );
}
if ( p_category->psz_name )
{
free( p_category->psz_name );
}
p_prev_category = p_category;
p_category = p_category->p_next;
free( p_prev_category );
}
return 0;
}