configuration.c

video linux conference

    /* if f_min == f_max == 0, then do not use them */
    if ((p_config->f_min == 0) && (p_config->f_max == 0))
    {
        p_config->f_value = f_value;
    }
    else if (f_value < p_config->f_min)
    {
        p_config->f_value = p_config->f_min;
    }
    else if (f_value > p_config->f_max)
    {
        p_config->f_value = p_config->f_max;
    }
    else
    {
        p_config->f_value = f_value;
    }

    p_config->b_dirty = VLC_TRUE;

    val.f_float = p_config->f_value;

    if( p_config->pf_callback )
    {
        p_config->pf_callback( p_this, psz_name, oldval, val,
                               p_config->p_callback_data );
    }
}

/*****************************************************************************
 * config_FindConfig: find the config structure associated with an option.
 *****************************************************************************
 * FIXME: This function really needs to be optimized.
 * FIXME: And now even more.
 *****************************************************************************/
module_config_t *config_FindConfig( vlc_object_t *p_this, const char *psz_name )
{
    vlc_list_t *p_list;
    module_t *p_parser;
    module_config_t *p_item;
    int i_index;

    if( !psz_name ) return NULL;

    p_list = vlc_list_find( p_this, VLC_OBJECT_MODULE, FIND_ANYWHERE );

    for( i_index = 0; i_index < p_list->i_count; i_index++ )
    {
        p_parser = (module_t *)p_list->p_values[i_index].p_object ;

        if( !p_parser->i_config_items )
            continue;

        for( p_item = p_parser->p_config;
             p_item->i_type != CONFIG_HINT_END;
             p_item++ )
        {
            if( p_item->i_type & CONFIG_HINT )
                /* ignore hints */
                continue;
            if( !strcmp( psz_name, p_item->psz_name ) )
            {
                vlc_list_release( p_list );
                return p_item;
            }
        }
    }

    vlc_list_release( p_list );

    return NULL;
}

/*****************************************************************************
 * config_FindModule: find a specific module structure.
 *****************************************************************************/
module_t *config_FindModule( vlc_object_t *p_this, const char *psz_name )
{
    vlc_list_t *p_list;
    module_t *p_module, *p_result = NULL;
    int i_index;

    if( !psz_name ) return NULL;

    p_list = vlc_list_find( p_this, VLC_OBJECT_MODULE, FIND_ANYWHERE );

    for( i_index = 0; i_index < p_list->i_count; i_index++ )
    {
        p_module = (module_t *)p_list->p_values[i_index].p_object;
        if( !strcmp( p_module->psz_object_name, psz_name ) )
        {
             p_result = p_module;
             break;
        }
    }

    vlc_list_release( p_list );

    return p_result;
}

/*****************************************************************************
 * config_Duplicate: creates a duplicate of a module's configuration data.
 *****************************************************************************
 * Unfortunatly we cannot work directly with the module's config data as
 * this module might be unloaded from memory at any time (remember HideModule).
 * This is why we need to create an exact copy of the config data.
 *****************************************************************************/
void config_Duplicate( module_t *p_module, module_config_t *p_orig )
{
    int i, j, i_lines = 1;
    module_config_t *p_item;

    /* Calculate the structure length */
    p_module->i_config_items = 0;
    p_module->i_bool_items = 0;

    for( p_item = p_orig; p_item->i_type != CONFIG_HINT_END; p_item++ )
    {
        i_lines++;

        if( p_item->i_type & CONFIG_ITEM )
        {
            p_module->i_config_items++;
        }

        if( p_item->i_type == CONFIG_ITEM_BOOL )
        {
            p_module->i_bool_items++;
        }
    }

    /* Allocate memory */
    p_module->p_config = (module_config_t *)malloc( sizeof(module_config_t)
                                                     * i_lines );
    if( p_module->p_config == NULL )
    {
        msg_Err( p_module, "config error: can't duplicate p_config" );
        return;
    }

    /* Do the duplication job */
    for( i = 0; i < i_lines ; i++ )
    {
        p_module->p_config[i] = p_orig[i];

        p_module->p_config[i].i_value_orig = p_orig[i].i_value;
        p_module->p_config[i].f_value_orig = p_orig[i].f_value;
        p_module->p_config[i].i_value_saved = p_orig[i].i_value;
        p_module->p_config[i].f_value_saved = p_orig[i].f_value;
        p_module->p_config[i].psz_value_saved = 0;

        p_module->p_config[i].psz_type = p_orig[i].psz_type ?
                                   strdup( p_orig[i].psz_type ) : NULL;
        p_module->p_config[i].psz_name = p_orig[i].psz_name ?
                                   strdup( p_orig[i].psz_name ) : NULL;
        p_module->p_config[i].psz_current = p_orig[i].psz_current?
                                   strdup( p_orig[i].psz_current ) : NULL;
        p_module->p_config[i].psz_text = p_orig[i].psz_text ?
                                   strdup( _(p_orig[i].psz_text) ) : NULL;
        p_module->p_config[i].psz_longtext = p_orig[i].psz_longtext ?
                                   strdup( _(p_orig[i].psz_longtext) ) : NULL;
        p_module->p_config[i].psz_value = p_orig[i].psz_value ?
                                   strdup( p_orig[i].psz_value ) : NULL;
        p_module->p_config[i].psz_value_orig = p_orig[i].psz_value ?
                                   strdup( p_orig[i].psz_value ) : NULL;

        p_module->p_config[i].p_lock = &p_module->object_lock;

        /* duplicate the string list */
        if( p_orig[i].i_list )
        {
            if( p_orig[i].ppsz_list )
            {
                p_module->p_config[i].ppsz_list =
                    malloc( (p_orig[i].i_list + 1) * sizeof(char *) );
                if( p_module->p_config[i].ppsz_list )
                {
                    for( j = 0; j < p_orig[i].i_list; j++ )
                        p_module->p_config[i].ppsz_list[j] = p_orig[i].ppsz_list[j] ?
                            strdup( p_orig[i].ppsz_list[j] ) : NULL ;
                    p_module->p_config[i].ppsz_list[j] = NULL;
                }
            }
            if( p_orig[i].ppsz_list_text )
            {
                p_module->p_config[i].ppsz_list_text =
                    malloc( (p_orig[i].i_list + 1) * sizeof(char *) );
                if( p_module->p_config[i].ppsz_list_text )
                {
                    for( j = 0; j < p_orig[i].i_list; j++ )
                        p_module->p_config[i].ppsz_list_text[j] = _(p_orig[i].ppsz_list_text[j]) ?
                            strdup( _(p_orig[i].ppsz_list_text[j] ) ) : NULL ;
                    p_module->p_config[i].ppsz_list_text[j] = NULL;
                }
            }
            if( p_orig[i].pi_list )
            {
                p_module->p_config[i].pi_list =
                    malloc( (p_orig[i].i_list + 1) * sizeof(int) );
                if( p_module->p_config[i].pi_list )
                {
                    for( j = 0; j < p_orig[i].i_list; j++ )
                        p_module->p_config[i].pi_list[j] =
                            p_orig[i].pi_list[j];
                }
            }
        }

        /* duplicate the actions list */
        if( p_orig[i].i_action )
        {
            int j;

            p_module->p_config[i].ppf_action =
                malloc( p_orig[i].i_action * sizeof(void *) );
            p_module->p_config[i].ppsz_action_text =
                malloc( p_orig[i].i_action * sizeof(char *) );

            for( j = 0; j < p_orig[i].i_action; j++ )
            {
                p_module->p_config[i].ppf_action[j] =
                    p_orig[i].ppf_action[j];
                p_module->p_config[i].ppsz_action_text[j] =
                    p_orig[i].ppsz_action_text[j] ?
                    strdup( p_orig[i].ppsz_action_text[j] ) : NULL;
            }
        }

        p_module->p_config[i].pf_callback = p_orig[i].pf_callback;
    }
}

/*****************************************************************************
 * config_Free: frees a duplicated module's configuration data.
 *****************************************************************************
 * This function frees all the data duplicated by config_Duplicate.
 *****************************************************************************/
void config_Free( module_t *p_module )
{
    module_config_t *p_item = p_module->p_config;
    int i;

    if( p_item == NULL )
    {
        return;
    }

    for( ; p_item->i_type != CONFIG_HINT_END ; p_item++ )
    {
        if( p_item->psz_type )
            free( p_item->psz_type );

        if( p_item->psz_name )
            free( p_item->psz_name );

        if( p_item->psz_current )
            free( p_item->psz_current );

        if( p_item->psz_text )
            free( p_item->psz_text );

        if( p_item->psz_longtext )
            free( p_item->psz_longtext );

        if( p_item->psz_value )
            free( p_item->psz_value );

        if( p_item->psz_value_orig )
            free( p_item->psz_value_orig );

        if( p_item->psz_value_saved )
            free( p_item->psz_value_saved );

        if( p_item->i_list )
        {
            for( i = 0; i < p_item->i_list; i++ )
            {
                if( p_item->ppsz_list && p_item->ppsz_list[i] )
                    free( p_item->ppsz_list[i] );
                if( p_item->ppsz_list_text && p_item->ppsz_list_text[i] )
                    free( p_item->ppsz_list_text[i] );
            }
            if( p_item->ppsz_list ) free( p_item->ppsz_list );
            if( p_item->ppsz_list_text ) free( p_item->ppsz_list_text );
            if( p_item->pi_list ) free( p_item->pi_list );
        }

        if( p_item->i_action )
        {
            for( i = 0; i < p_item->i_action; i++ )
            {
                if( p_item->ppsz_action_text[i] )
                    free( p_item->ppsz_action_text[i] );
            }
            if( p_item->ppf_action ) free( p_item->ppf_action );
            if( p_item->ppsz_action_text ) free( p_item->ppsz_action_text );
        }
    }

    free( p_module->p_config );
    p_module->p_config = NULL;
}

/*****************************************************************************
 * config_SetCallbacks: sets callback functions in the duplicate p_config.
 *****************************************************************************
 * Unfortunatly we cannot work directly with the module's config data as
 * this module might be unloaded from memory at any time (remember HideModule).
 * This is why we need to duplicate callbacks each time we reload the module.
 *****************************************************************************/
void config_SetCallbacks( module_config_t *p_new, module_config_t *p_orig )
{
    while( p_new->i_type != CONFIG_HINT_END )
    {
        p_new->pf_callback = p_orig->pf_callback;
        p_new++;
        p_orig++;
    }
}

/*****************************************************************************
 * config_UnsetCallbacks: unsets callback functions in the duplicate p_config.
 *****************************************************************************
 * We simply undo what we did in config_SetCallbacks.
 *****************************************************************************/
void config_UnsetCallbacks( module_config_t *p_new )
{
    while( p_new->i_type != CONFIG_HINT_END )
    {
        p_new->pf_callback = NULL;
        p_new++;
    }
}

/*****************************************************************************
 * config_ResetAll: reset the configuration data for all the modules.
 *****************************************************************************/
void __config_ResetAll( vlc_object_t *p_this )
{
    int i_index, i;
    vlc_list_t *p_list;
    module_t *p_module;

    /* Acquire config file lock */
    vlc_mutex_lock( &p_this->p_vlc->config_lock );

    p_list = vlc_list_find( p_this, VLC_OBJECT_MODULE, FIND_ANYWHERE );

    for( i_index = 0; i_index < p_list->i_count; i_index++ )
    {
        p_module = (module_t *)p_list->p_values[i_index].p_object ;
        if( p_module->b_submodule ) continue;

        for( i = 0; p_module->p_config[i].i_type != CONFIG_HINT_END; i++ )
        {
            p_module->p_config[i].i_value = p_module->p_config[i].i_value_orig;
            p_module->p_config[i].f_value = p_module->p_config[i].f_value_orig;
            if( p_module->p_config[i].psz_value )
                free( p_module->p_config[i].psz_value );
            p_module->p_config[i].psz_value =
                p_module->p_config[i].psz_value_orig ?
                strdup( p_module->p_config[i].psz_value_orig ) : NULL;
        }
    }

    vlc_list_release( p_list );
    vlc_mutex_unlock( &p_this->p_vlc->config_lock );
}

/*****************************************************************************