chanvars.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2005, Digium, Inc.
   5  *
   6  * Mark Spencer <markster@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \brief Channel Variables
  22  *
  23  * \author Mark Spencer <markster@digium.com>
  24  */
  25
  26 #include "asterisk.h"
  27
  28 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  29
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include "asterisk/chanvars.h"
  34 #include "asterisk/logger.h"
  35 #include "asterisk/strings.h"
  36 #include "asterisk/utils.h"
  37
  38 struct ast_var_t *ast_var_assign(const char *name, const char *value)
  39 {
  40         struct ast_var_t *var;
  41         int name_len = strlen(name) + 1;
  42         int value_len = strlen(value) + 1;
  43
  44         if (!(var = ast_calloc(sizeof(*var) + name_len + value_len, sizeof(char)))) {
  45                 return NULL;
  46         }
  47
  48         ast_copy_string(var->name, name, name_len);
  49         var->value = var->name + name_len;
  50         ast_copy_string(var->value, value, value_len);
  51
  52         return var;
  53 }
  54
  55 void ast_var_delete(struct ast_var_t *var)
  56 {
  57         if (var)
  58                 free(var);
  59 }
  60
  61 const char *ast_var_name(const struct ast_var_t *var)
  62 {
  63         const char *name;
  64
  65         if (var == NULL || (name = var->name) == NULL)
  66                 return NULL;
  67         /* Return the name without the initial underscores */
  68         if (name[0] == '_') {
  69                 name++;
  70                 if (name[0] == '_')
  71                         name++;
  72         }
  73         return name;
  74 }
  75
  76 const char *ast_var_full_name(const struct ast_var_t *var)
  77 {
  78         return (var ? var->name : NULL);
  79 }
  80
  81 const char *ast_var_value(const struct ast_var_t *var)
  82 {
  83         return (var ? var->value : NULL);
  84 }
  85
  86