Sat Aug 6 00:39:28 2011

Asterisk developer's documentation


chanvars.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Mark Spencer <markster@digium.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*! \file
00020  *
00021  * \brief Channel Variables
00022  *
00023  * \author Mark Spencer <markster@digium.com> 
00024  */
00025 
00026 #include "asterisk.h"
00027 
00028 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 40864 $")
00029 
00030 #include <stdio.h>
00031 #include <stdlib.h>
00032 #include <string.h>
00033 
00034 #include "asterisk/chanvars.h"
00035 #include "asterisk/logger.h"
00036 #include "asterisk/strings.h"
00037 #include "asterisk/utils.h"
00038 
00039 struct ast_var_t *ast_var_assign(const char *name, const char *value)
00040 {  
00041    struct ast_var_t *var;
00042    int name_len = strlen(name) + 1;
00043    int value_len = strlen(value) + 1;
00044 
00045    if (!(var = ast_calloc(sizeof(*var) + name_len + value_len, sizeof(char)))) {
00046       return NULL;
00047    }
00048 
00049    ast_copy_string(var->name, name, name_len);
00050    var->value = var->name + name_len;
00051    ast_copy_string(var->value, value, value_len);
00052    
00053    return var;
00054 }  
00055    
00056 void ast_var_delete(struct ast_var_t *var)
00057 {
00058    if (var)
00059       free(var);
00060 }
00061 
00062 const char *ast_var_name(const struct ast_var_t *var)
00063 {
00064    const char *name;
00065 
00066    if (var == NULL || (name = var->name) == NULL)
00067       return NULL;
00068    /* Return the name without the initial underscores */
00069    if (name[0] == '_') {
00070       name++;
00071       if (name[0] == '_')
00072          name++;
00073    }
00074    return name;
00075 }
00076 
00077 const char *ast_var_full_name(const struct ast_var_t *var)
00078 {
00079    return (var ? var->name : NULL);
00080 }
00081 
00082 const char *ast_var_value(const struct ast_var_t *var)
00083 {
00084    return (var ? var->value : NULL);
00085 }
00086 
00087 

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