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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  */
00024 
00025 #include <stdlib.h>
00026 #include <string.h>
00027 
00028 #include "asterisk.h"
00029 
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 7221 $")
00031 
00032 #include "asterisk/chanvars.h"
00033 #include "asterisk/logger.h"
00034 #include "asterisk/strings.h"
00035 
00036 struct ast_var_t *ast_var_assign(const char *name, const char *value)
00037 {
00038    int i;
00039    struct ast_var_t *var;
00040    
00041    var = calloc(sizeof(struct ast_var_t) + strlen(name) + 1 + strlen(value) + 1, sizeof(char));
00042 
00043    if (var == NULL) {
00044       ast_log(LOG_WARNING, "Out of memory\n");
00045       return NULL;
00046    }
00047 
00048    i = strlen(name) + 1;
00049    ast_copy_string(var->name, name, i);
00050    var->value = var->name + i;
00051    ast_copy_string(var->value, value, strlen(value) + 1);
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 char *ast_var_name(struct ast_var_t *var)
00063 {
00064    char *name;
00065 
00066    if (var == NULL)
00067       return NULL;
00068    if (var->name == NULL)
00069       return NULL;
00070    /* Return the name without the initial underscores */
00071    if (var->name[0] == '_') {
00072       if (var->name[1] == '_')
00073          name = (char*)&(var->name[2]);
00074       else
00075          name = (char*)&(var->name[1]);
00076    } else
00077       name = var->name;
00078    return name;
00079 }
00080 
00081 char *ast_var_full_name(struct ast_var_t *var)
00082 {
00083    return (var ? var->name : NULL);
00084 }
00085 
00086 char *ast_var_value(struct ast_var_t *var)
00087 {
00088    return (var ? var->value : NULL);
00089 }
00090 
00091 

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