149 lines
2.9 KiB
C
149 lines
2.9 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Channel Variables
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*
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* \author Mark Spencer <markster@digium.com>
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include "asterisk/chanvars.h"
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#include "asterisk/strings.h"
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#include "asterisk/utils.h"
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struct ast_var_t *_ast_var_assign(const char *name, const char *value, const char *file, int lineno, const char *function)
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{
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struct ast_var_t *var;
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int name_len = strlen(name) + 1;
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int value_len = strlen(value) + 1;
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var = __ast_calloc(sizeof(*var) + name_len + value_len, sizeof(char),
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file, lineno, function);
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if (!var) {
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return NULL;
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}
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ast_copy_string(var->name, name, name_len);
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var->value = var->name + name_len;
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ast_copy_string(var->value, value, value_len);
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return var;
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}
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void ast_var_delete(struct ast_var_t *var)
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{
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ast_free(var);
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}
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const char *ast_var_name(const struct ast_var_t *var)
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{
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const char *name;
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if (var == NULL || (name = var->name) == NULL)
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return NULL;
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/* Return the name without the initial underscores */
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if (name[0] == '_') {
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name++;
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if (name[0] == '_')
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name++;
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}
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return name;
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}
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const char *ast_var_full_name(const struct ast_var_t *var)
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{
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return (var ? var->name : NULL);
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}
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const char *ast_var_value(const struct ast_var_t *var)
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{
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return (var ? var->value : NULL);
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}
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char *ast_var_find(const struct varshead *head, const char *name)
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{
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struct ast_var_t *var;
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AST_LIST_TRAVERSE(head, var, entries) {
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if (!strcmp(name, var->name)) {
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return var->value;
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}
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}
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return NULL;
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}
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struct varshead *ast_var_list_create(void)
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{
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struct varshead *head;
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head = ast_calloc(1, sizeof(*head));
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if (!head) {
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return NULL;
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}
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AST_LIST_HEAD_INIT_NOLOCK(head);
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return head;
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}
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void ast_var_list_destroy(struct varshead *head)
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{
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struct ast_var_t *var;
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if (!head) {
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return;
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}
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while ((var = AST_LIST_REMOVE_HEAD(head, entries))) {
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ast_var_delete(var);
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}
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ast_free(head);
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}
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struct varshead *ast_var_list_clone(struct varshead *head)
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{
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struct varshead *clone;
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struct ast_var_t *var, *newvar;
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if (!head) {
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return NULL;
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}
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clone = ast_var_list_create();
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if (!clone) {
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return NULL;
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}
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AST_VAR_LIST_TRAVERSE(head, var) {
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newvar = ast_var_assign(var->name, var->value);
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if (!newvar) {
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ast_var_list_destroy(clone);
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return NULL;
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}
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AST_VAR_LIST_INSERT_TAIL(clone, newvar);
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}
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return clone;
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}
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