core.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:17k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * core.c management of the modules configuration
- *****************************************************************************
- * Copyright (C) 2001-2007 the VideoLAN team
- * $Id: 721c2b58d560239022bf49abd91339cdf390b423 $
- *
- * Authors: Gildas Bazin <gbazin@videolan.org>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include "vlc_keys.h"
- #include "vlc_charset.h"
- #include "vlc_configuration.h"
- #include <assert.h>
- #include "configuration.h"
- #include "modules/modules.h"
- static inline char *strdupnull (const char *src)
- {
- return src ? strdup (src) : NULL;
- }
- /* Item types that use a string value (i.e. serialized in the module cache) */
- int IsConfigStringType (int type)
- {
- static const unsigned char config_types[] =
- {
- CONFIG_ITEM_STRING, CONFIG_ITEM_FILE, CONFIG_ITEM_MODULE,
- CONFIG_ITEM_DIRECTORY, CONFIG_ITEM_MODULE_CAT, CONFIG_ITEM_PASSWORD,
- CONFIG_ITEM_MODULE_LIST, CONFIG_ITEM_MODULE_LIST_CAT
- };
- /* NOTE: this needs to be changed if we ever get more than 255 types */
- return memchr (config_types, type, sizeof (config_types)) != NULL;
- }
- int IsConfigIntegerType (int type)
- {
- static const unsigned char config_types[] =
- {
- CONFIG_ITEM_INTEGER, CONFIG_ITEM_KEY, CONFIG_ITEM_BOOL,
- CONFIG_CATEGORY, CONFIG_SUBCATEGORY
- };
- return memchr (config_types, type, sizeof (config_types)) != NULL;
- }
- /*****************************************************************************
- * config_GetType: get the type of a variable (bool, int, float, string)
- *****************************************************************************
- * This function is used to get the type of a variable from its name.
- * Beware, this is quite slow.
- *****************************************************************************/
- int __config_GetType( vlc_object_t *p_this, const char *psz_name )
- {
- module_config_t *p_config;
- int i_type;
- p_config = config_FindConfig( p_this, psz_name );
- /* sanity checks */
- if( !p_config )
- {
- return 0;
- }
- switch( p_config->i_type )
- {
- case CONFIG_ITEM_BOOL:
- i_type = VLC_VAR_BOOL;
- break;
- case CONFIG_ITEM_INTEGER:
- case CONFIG_ITEM_KEY:
- i_type = VLC_VAR_INTEGER;
- break;
- case CONFIG_ITEM_FLOAT:
- i_type = VLC_VAR_FLOAT;
- break;
- case CONFIG_ITEM_MODULE:
- case CONFIG_ITEM_MODULE_CAT:
- case CONFIG_ITEM_MODULE_LIST:
- case CONFIG_ITEM_MODULE_LIST_CAT:
- i_type = VLC_VAR_MODULE;
- break;
- case CONFIG_ITEM_STRING:
- i_type = VLC_VAR_STRING;
- break;
- case CONFIG_ITEM_PASSWORD:
- i_type = VLC_VAR_STRING;
- break;
- case CONFIG_ITEM_FILE:
- i_type = VLC_VAR_FILE;
- break;
- case CONFIG_ITEM_DIRECTORY:
- i_type = VLC_VAR_DIRECTORY;
- break;
- default:
- i_type = 0;
- break;
- }
- return i_type;
- }
- /*****************************************************************************
- * config_GetInt: get the value of an int variable
- *****************************************************************************
- * This function is used to get the value of variables which are internally
- * represented by an integer (CONFIG_ITEM_INTEGER and
- * CONFIG_ITEM_BOOL).
- *****************************************************************************/
- int __config_GetInt( vlc_object_t *p_this, const char *psz_name )
- {
- module_config_t *p_config;
- p_config = config_FindConfig( p_this, psz_name );
- /* sanity checks */
- if( !p_config )
- {
- msg_Err( p_this, "option %s does not exist", psz_name );
- return -1;
- }
- if (!IsConfigIntegerType (p_config->i_type))
- {
- msg_Err( p_this, "option %s does not refer to an int", psz_name );
- return -1;
- }
- return p_config->value.i;
- }
- /*****************************************************************************
- * config_GetFloat: get the value of a float variable
- *****************************************************************************
- * This function is used to get the value of variables which are internally
- * represented by a float (CONFIG_ITEM_FLOAT).
- *****************************************************************************/
- float __config_GetFloat( vlc_object_t *p_this, const char *psz_name )
- {
- module_config_t *p_config;
- p_config = config_FindConfig( p_this, psz_name );
- /* sanity checks */
- if( !p_config )
- {
- msg_Err( p_this, "option %s does not exist", psz_name );
- return -1;
- }
- if (!IsConfigFloatType (p_config->i_type))
- {
- msg_Err( p_this, "option %s does not refer to a float", psz_name );
- return -1;
- }
- return p_config->value.f;
- }
- /*****************************************************************************
- * config_GetPsz: get the string value of a string variable
- *****************************************************************************
- * This function is used to get the value of variables which are internally
- * represented by a string (CONFIG_ITEM_STRING, CONFIG_ITEM_FILE,
- * CONFIG_ITEM_DIRECTORY, CONFIG_ITEM_PASSWORD, and CONFIG_ITEM_MODULE).
- *
- * Important note: remember to free() the returned char* because it's a
- * duplicate of the actual value. It isn't safe to return a pointer to the
- * actual value as it can be modified at any time.
- *****************************************************************************/
- char * __config_GetPsz( vlc_object_t *p_this, const char *psz_name )
- {
- module_config_t *p_config;
- p_config = config_FindConfig( p_this, psz_name );
- /* sanity checks */
- if( !p_config )
- {
- msg_Err( p_this, "option %s does not exist", psz_name );
- return NULL;
- }
- if (!IsConfigStringType (p_config->i_type))
- {
- msg_Err( p_this, "option %s does not refer to a string", psz_name );
- return NULL;
- }
- /* return a copy of the string */
- vlc_mutex_lock( p_config->p_lock );
- char *psz_value = strdupnull (p_config->value.psz);
- vlc_mutex_unlock( p_config->p_lock );
- return psz_value;
- }
- /*****************************************************************************
- * config_PutPsz: set the string value of a string variable
- *****************************************************************************
- * This function is used to set the value of variables which are internally
- * represented by a string (CONFIG_ITEM_STRING, CONFIG_ITEM_FILE,
- * CONFIG_ITEM_DIRECTORY, CONFIG_ITEM_PASSWORD, and CONFIG_ITEM_MODULE).
- *****************************************************************************/
- void __config_PutPsz( vlc_object_t *p_this,
- const char *psz_name, const char *psz_value )
- {
- module_config_t *p_config;
- vlc_value_t oldval, val;
- p_config = config_FindConfig( p_this, psz_name );
- /* sanity checks */
- if( !p_config )
- {
- msg_Warn( p_this, "option %s does not exist", psz_name );
- return;
- }
- if (!IsConfigStringType (p_config->i_type))
- {
- msg_Err( p_this, "option %s does not refer to a string", psz_name );
- return;
- }
- vlc_mutex_lock( p_config->p_lock );
- /* backup old value */
- oldval.psz_string = (char *)p_config->value.psz;
- if ((psz_value != NULL) && *psz_value)
- p_config->value.psz = strdup (psz_value);
- else
- p_config->value.psz = NULL;
- p_config->b_dirty = true;
- val.psz_string = (char *)p_config->value.psz;
- vlc_mutex_unlock( p_config->p_lock );
- if( p_config->pf_callback )
- {
- p_config->pf_callback( p_this, psz_name, oldval, val,
- p_config->p_callback_data );
- }
- /* free old string */
- free( oldval.psz_string );
- }
- /*****************************************************************************
- * config_PutInt: set the integer value of an int variable
- *****************************************************************************
- * This function is used to set the value of variables which are internally
- * represented by an integer (CONFIG_ITEM_INTEGER and
- * CONFIG_ITEM_BOOL).
- *****************************************************************************/
- void __config_PutInt( vlc_object_t *p_this, const char *psz_name, int i_value )
- {
- module_config_t *p_config;
- vlc_value_t oldval, val;
- p_config = config_FindConfig( p_this, psz_name );
- /* sanity checks */
- if( !p_config )
- {
- msg_Warn( p_this, "option %s does not exist", psz_name );
- return;
- }
- if (!IsConfigIntegerType (p_config->i_type))
- {
- msg_Err( p_this, "option %s does not refer to an int", psz_name );
- return;
- }
- /* backup old value */
- oldval.i_int = p_config->value.i;
- /* if i_min == i_max == 0, then do not use them */
- if ((p_config->min.i == 0) && (p_config->max.i == 0))
- {
- p_config->value.i = i_value;
- }
- else if (i_value < p_config->min.i)
- {
- p_config->value.i = p_config->min.i;
- }
- else if (i_value > p_config->max.i)
- {
- p_config->value.i = p_config->max.i;
- }
- else
- {
- p_config->value.i = i_value;
- }
- p_config->b_dirty = true;
- val.i_int = p_config->value.i;
- if( p_config->pf_callback )
- {
- p_config->pf_callback( p_this, psz_name, oldval, val,
- p_config->p_callback_data );
- }
- }
- /*****************************************************************************
- * config_PutFloat: set the value of a float variable
- *****************************************************************************
- * This function is used to set the value of variables which are internally
- * represented by a float (CONFIG_ITEM_FLOAT).
- *****************************************************************************/
- void __config_PutFloat( vlc_object_t *p_this,
- const char *psz_name, float f_value )
- {
- module_config_t *p_config;
- vlc_value_t oldval, val;
- p_config = config_FindConfig( p_this, psz_name );
- /* sanity checks */
- if( !p_config )
- {
- msg_Warn( p_this, "option %s does not exist", psz_name );
- return;
- }
- if (!IsConfigFloatType (p_config->i_type))
- {
- msg_Err( p_this, "option %s does not refer to a float", psz_name );
- return;
- }
- /* backup old value */
- oldval.f_float = p_config->value.f;
- /* if f_min == f_max == 0, then do not use them */
- if ((p_config->min.f == 0) && (p_config->max.f == 0))
- {
- p_config->value.f = f_value;
- }
- else if (f_value < p_config->min.f)
- {
- p_config->value.f = p_config->min.f;
- }
- else if (f_value > p_config->max.f)
- {
- p_config->value.f = p_config->max.f;
- }
- else
- {
- p_config->value.f = f_value;
- }
- p_config->b_dirty = true;
- val.f_float = p_config->value.f;
- 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.
- * FIXME: remove p_this pointer parameter (or use it)
- *****************************************************************************/
- module_config_t *config_FindConfig( vlc_object_t *p_this, const char *psz_name )
- {
- module_t *p_parser;
- if( !psz_name ) return NULL;
- module_t **list = module_list_get (NULL);
- if (list == NULL)
- return NULL;
- for (size_t i = 0; (p_parser = list[i]) != NULL; i++)
- {
- module_config_t *p_item, *p_end;
- if( !p_parser->i_config_items )
- continue;
- for( p_item = p_parser->p_config, p_end = p_item + p_parser->confsize;
- p_item < p_end;
- p_item++ )
- {
- if( p_item->i_type & CONFIG_HINT )
- /* ignore hints */
- continue;
- if( !strcmp( psz_name, p_item->psz_name )
- || ( p_item->psz_oldname
- && !strcmp( psz_name, p_item->psz_oldname ) ) )
- {
- module_list_free (list);
- return p_item;
- }
- }
- }
- module_list_free (list);
- return NULL;
- }
- /*****************************************************************************
- * 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 )
- {
- int i;
- for (size_t j = 0; j < p_module->confsize; j++)
- {
- module_config_t *p_item = p_module->p_config + j;
- free( p_item->psz_type );
- free( p_item->psz_name );
- free( p_item->psz_text );
- free( p_item->psz_longtext );
- free( p_item->psz_oldname );
- if (IsConfigStringType (p_item->i_type))
- {
- free (p_item->value.psz);
- free (p_item->orig.psz);
- free (p_item->saved.psz);
- }
- if( p_item->ppsz_list )
- for( i = 0; i < p_item->i_list; i++ )
- free( p_item->ppsz_list[i] );
- if( p_item->ppsz_list_text )
- for( i = 0; i < p_item->i_list; i++ )
- free( p_item->ppsz_list_text[i] );
- free( p_item->ppsz_list );
- free( p_item->ppsz_list_text );
- free( p_item->pi_list );
- if( p_item->i_action )
- {
- for( i = 0; i < p_item->i_action; i++ )
- {
- free( p_item->ppsz_action_text[i] );
- }
- free( p_item->ppf_action );
- 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,
- size_t n )
- {
- for (size_t i = 0; i < n; i++)
- {
- 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, size_t n )
- {
- for (size_t i = 0; i < n; i++)
- {
- 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 )
- {
- module_t *p_module;
- module_t **list = module_list_get (NULL);
- for (size_t j = 0; (p_module = list[j]) != NULL; j++)
- {
- if( p_module->b_submodule ) continue;
- for (size_t i = 0; i < p_module->confsize; i++ )
- {
- module_config_t *p_config = p_module->p_config + i;
- vlc_mutex_lock (p_config->p_lock);
- if (IsConfigIntegerType (p_config->i_type))
- p_config->value.i = p_config->orig.i;
- else
- if (IsConfigFloatType (p_config->i_type))
- p_config->value.f = p_config->orig.f;
- else
- if (IsConfigStringType (p_config->i_type))
- {
- free ((char *)p_config->value.psz);
- p_config->value.psz =
- strdupnull (p_config->orig.psz);
- }
- vlc_mutex_unlock (p_config->p_lock);
- }
- }
- module_list_free (list);
- }