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 * ??????? 00022 * \todo Explain this file! 00023 */ 00024 00025 00026 #ifndef _ASTERISK_EXPR_H 00027 #define _ASTERISK_EXPR_H 00028 #ifndef STANDALONE 00029 #endif 00030 #if defined(__cplusplus) || defined(c_plusplus) 00031 extern "C" { 00032 #endif 00033 00034 /*!\brief Evaluate the given expression 00035 * \param expr An expression 00036 * \param buf Result buffer 00037 * \param length Size of the result buffer, in bytes 00038 * \param chan Channel to use for evaluating included dialplan functions, if any 00039 * \return Length of the result string, in bytes 00040 */ 00041 int ast_expr(char *expr, char *buf, int length, struct ast_channel *chan); 00042 00043 /*!\brief Evaluate the given expression 00044 * \param str Dynamic result buffer 00045 * \param maxlen <0 if the size of the buffer should remain constant, >0 if the size of the buffer should expand to that many bytes, maximum, or 0 for unlimited expansion of the result buffer 00046 * \param chan Channel to use for evaluating included dialplan functions, if any 00047 * \param expr An expression 00048 * \return Length of the result string, in bytes 00049 */ 00050 int ast_str_expr(struct ast_str **str, ssize_t maxlen, struct ast_channel *chan, char *expr); 00051 00052 #if defined(__cplusplus) || defined(c_plusplus) 00053 } 00054 #endif 00055 00056 #endif /* _ASTERISK_EXPR_H */