459 lines
21 KiB
C
459 lines
21 KiB
C
/*
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* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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* Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
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*
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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*
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* The Initial Developer of the Original Code is
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* Anthony Minessale II <anthm@freeswitch.org>
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* Portions created by the Initial Developer are Copyright (C)
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Anthony Minessale II <anthm@freeswitch.org>
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*
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*
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* switch_xml.h -- XML PARSER
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*
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* Derived from EZXML http://ezxml.sourceforge.net
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* Original Copyright
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*
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* Copyright 2004, 2005 Aaron Voisine <aaron@voisine.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef FREESWITCH_XML_H
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#define FREESWITCH_XML_H
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#include <switch.h>
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/* Use UTF-8 as the general encoding */
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#define USE_UTF_8_ENCODING SWITCH_TRUE
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struct switch_xml_binding;
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///\defgroup xml1 XML Library Functions
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///\ingroup core1
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///\{
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SWITCH_BEGIN_EXTERN_C
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#define SWITCH_XML_BUFSIZE 1024 // size of internal memory buffers
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typedef enum {
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SWITCH_XML_ROOT = (1 << 0), // root
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SWITCH_XML_NAMEM = (1 << 1), // name is malloced
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SWITCH_XML_TXTM = (1 << 2), // txt is malloced
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SWITCH_XML_DUP = (1 << 3), // attribute name and value are strduped
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SWITCH_XML_CDATA = (1 << 4) // body is in CDATA
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} switch_xml_flag_t;
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/*! \brief A representation of an XML tree */
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struct switch_xml {
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/*! tag name */
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char *name;
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/*! tag attributes { name, value, name, value, ... NULL } */
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char **attr;
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/*! tag character content, empty string if none */
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char *txt;
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/*! path to free on destroy */
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char *free_path;
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/*! tag offset from start of parent tag character content */
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switch_size_t off;
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/*! next tag with same name in this section at this depth */
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switch_xml_t next;
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/*! next tag with different name in same section and depth */
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switch_xml_t sibling;
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/*! next tag, same section and depth, in original order */
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switch_xml_t ordered;
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/*! head of sub tag list, NULL if none */
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switch_xml_t child;
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/*! parent tag, NULL if current tag is root tag */
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switch_xml_t parent;
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/*! flags */
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uint32_t flags;
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/*! is_switch_xml_root bool */
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switch_bool_t is_switch_xml_root_t;
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uint32_t refs;
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/*! pointer to end of opening tag, '>', in the original parsed text */
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const char *open;
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/*! pointer to start of closing tag, '<', in the original parsed text */
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const char *close;
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};
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/*!
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* \brief Parses a string into a switch_xml_t, ensuring the memory will be freed with switch_xml_free
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* \param s The string to parse
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* \param dup true if you want the string to be strdup()'d automatically
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* \return the switch_xml_t or NULL if an error occured
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*/
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SWITCH_DECLARE(switch_xml_t) switch_xml_parse_str_dynamic(_In_z_ char *s, _In_ switch_bool_t dup);
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/*!
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* \brief Parses a string into a switch_xml_t
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* \param s The string to parse
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* \return the switch_xml_t or NULL if an error occured
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*/
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#define switch_xml_parse_str_dup(x) switch_xml_parse_str_dynamic(x, SWITCH_TRUE)
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///\brief Given a string of xml data and its length, parses it and creates an switch_xml
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///\ structure. For efficiency, modifies the data by adding null terminators
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///\ and decoding ampersand sequences. If you don't want this, copy the data and
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///\ pass in the copy. Returns NULL on failure.
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///\param s a string
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///\param len the length of the string
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///\return a formated xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_parse_str(_In_z_ char *s, _In_ switch_size_t len);
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///\brief A wrapper for switch_xml_parse_str() that accepts a file descriptor. First
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///\ attempts to mem map the file. Failing that, reads the file into memory.
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///\ Returns NULL on failure.
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///\param fd
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///\return a formated xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_parse_fd(int fd);
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///\brief a wrapper for switch_xml_parse_fd() that accepts a file name
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///\param file a file to parse
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///\return a formated xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_parse_file(_In_z_ const char *file);
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SWITCH_DECLARE(switch_xml_t) switch_xml_parse_file_simple(_In_z_ const char *file);
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///\brief Wrapper for switch_xml_parse_str() that accepts a file stream. Reads the entire
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///\ stream into memory and then parses it. For xml files, use switch_xml_parse_file()
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///\ or switch_xml_parse_fd()
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///\param fp a FILE pointer to parse
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_parse_fp(_In_ FILE * fp);
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///\brief returns the first child tag (one level deeper) with the given name or NULL
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///\ if not found
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///\param xml an xml node
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///\param name the name of the child tag
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_child(_In_ switch_xml_t xml, _In_z_ const char *name);
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///\brief find a child tag in a node called 'childname' with an attribute 'attrname' which equals 'value'
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///\param node the xml node
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///\param childname the child tag name
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///\param attrname the attribute name
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///\param value the value
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_find_child(_In_ switch_xml_t node, _In_z_ const char *childname, _In_opt_z_ const char *attrname,
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_In_opt_z_ const char *value);
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SWITCH_DECLARE(switch_xml_t) switch_xml_find_child_multi(_In_ switch_xml_t node, _In_z_ const char *childname, ...);
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///\brief returns the next tag of the same name in the same section and depth or NULL
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///\ if not found
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///\param xml an xml node
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///\return an xml node or NULL
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#define switch_xml_next(xml) ((xml) ? xml->next : NULL)
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///\brief Returns the Nth tag with the same name in the same section at the same depth
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///\ or NULL if not found. An index of 0 returns the tag given.
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///\param xml the xml node
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///\param idx the index
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///\return an xml node or NULL
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switch_xml_t switch_xml_idx(_In_ switch_xml_t xml, _In_ int idx);
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///\brief returns the name of the given tag
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///\param xml the xml node
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///\return the name
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#define switch_xml_name(xml) ((xml) ? xml->name : NULL)
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///\brief returns the given tag's character content or empty string if none
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///\param xml the xml node
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///\return the content
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#define switch_xml_txt(xml) ((xml) ? xml->txt : "")
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///\brief returns the value of the requested tag attribute, or NULL if not found
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///\param xml the xml node
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///\param attr the attribute
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///\return the value
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SWITCH_DECLARE(const char *) switch_xml_attr(_In_opt_ switch_xml_t xml, _In_opt_z_ const char *attr);
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///\brief returns the value of the requested tag attribute, or "" if not found
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///\param xml the xml node
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///\param attr the attribute
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///\return the value
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SWITCH_DECLARE(const char *) switch_xml_attr_soft(_In_ switch_xml_t xml, _In_z_ const char *attr);
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///\brief Traverses the switch_xml structure to retrieve a specific subtag. Takes a
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///\ variable length list of tag names and indexes. The argument list must be
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///\ terminated by either an index of -1 or an empty string tag name. Example:
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///\ title = switch_xml_get(library, "shelf", 0, "book", 2, "title", -1);
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///\ This retrieves the title of the 3rd book on the 1st shelf of library.
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///\ Returns NULL if not found.
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///\param xml the xml node
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_get(_In_ switch_xml_t xml,...);
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///\brief Converts an switch_xml structure back to xml in html format. Returns a string of html data that
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///\ must be freed.
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///\param xml the xml node
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///\param prn_header add <?xml version..> header too
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///\param use_utf8_encoding encoding into ampersand entities for UTF-8 chars
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///\return the ampersanded html text string to display xml
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#define switch_xml_toxml(xml, prn_header) switch_xml_toxml_ex(xml, prn_header, USE_UTF_8_ENCODING)
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#define switch_xml_toxml_nolock(xml, prn_header) switch_xml_toxml_nolock_ex(xml, prn_header, USE_UTF_8_ENCODING)
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#define switch_xml_tohtml(xml, prn_header) switch_xml_tohtml_ex(xml, prn_header, USE_UTF_8_ENCODING)
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SWITCH_DECLARE(char *) switch_xml_toxml_ex(_In_ switch_xml_t xml, _In_ switch_bool_t prn_header, switch_bool_t use_utf8_encoding);
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SWITCH_DECLARE(char *) switch_xml_toxml_nolock_ex(switch_xml_t xml, _In_ switch_bool_t prn_header, switch_bool_t use_utf8_encoding);
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SWITCH_DECLARE(char *) switch_xml_tohtml_ex(_In_ switch_xml_t xml, _In_ switch_bool_t prn_header, switch_bool_t use_utf8_encoding);
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///\brief Converts an switch_xml structure back to xml using the buffer passed in the parameters.
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///\param xml the xml node
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///\param buf buffer to use
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///\param buflen size of buffer
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///\param offset offset to start at
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///\param prn_header add <?xml version..> header too
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///\param use_utf8_encoding encoding into ampersand entities for UTF-8 chars
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///\return the xml text string
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#define switch_xml_toxml_buf(xml, buf, buflen, offset, prn_header) switch_xml_toxml_buf_ex(xml, buf, buflen, offset, prn_header, USE_UTF_8_ENCODING);
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SWITCH_DECLARE(char *) switch_xml_toxml_buf_ex(_In_ switch_xml_t xml, _In_z_ char *buf, _In_ switch_size_t buflen, _In_ switch_size_t offset,
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_In_ switch_bool_t prn_header, switch_bool_t use_utf8_encoding);
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///\brief returns a NULL terminated array of processing instructions for the given
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///\ target
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///\param xml the xml node
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///\param target the instructions
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///\return the array
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SWITCH_DECLARE(const char **) switch_xml_pi(_In_ switch_xml_t xml, _In_z_ const char *target);
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///\brief frees the memory allocated for an switch_xml structure
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///\param xml the xml node
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///\note in the case of the root node the readlock will be lifted
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SWITCH_DECLARE(void) switch_xml_free(_In_opt_ switch_xml_t xml);
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SWITCH_DECLARE(void) switch_xml_free_in_thread(_In_ switch_xml_t xml, _In_ int stacksize);
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///\brief returns parser error message or empty string if none
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///\param xml the xml node
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///\return the error string or nothing
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SWITCH_DECLARE(const char *) switch_xml_error(_In_ switch_xml_t xml);
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///\brief returns a new empty switch_xml structure with the given root tag name
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///\param name the name of the new root tag
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SWITCH_DECLARE(switch_xml_t) switch_xml_new(_In_opt_z_ const char *name);
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///\brief wrapper for switch_xml_new() that strdup()s name
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///\param name the name of the root
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///\return an xml node or NULL
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#define switch_xml_new_d(name) switch_xml_set_flag(switch_xml_new(strdup(name)), SWITCH_XML_NAMEM)
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///\brief Adds a child tag. off is the offset of the child tag relative to the start
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///\ of the parent tag's character content. Returns the child tag.
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///\param xml the xml node
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///\param name the name of the tag
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///\param off the offset
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_add_child(_In_ switch_xml_t xml, _In_z_ const char *name, _In_ switch_size_t off);
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///\brief wrapper for switch_xml_add_child() that strdup()s name
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///\param xml the xml node
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///\param name the name of the child
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///\param off the offset
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SWITCH_DECLARE(switch_xml_t) switch_xml_add_child_d(_In_ switch_xml_t xml, _In_z_ const char *name, _In_ switch_size_t off);
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///\brief sets the character content for the given tag and returns the tag
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///\param xml the xml node
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///\param txt the text
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_set_txt(switch_xml_t xml, const char *txt);
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///\brief wrapper for switch_xml_set_txt() that strdup()s txt
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///\ sets the character content for the given tag and returns the tag
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///\param xml the xml node
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///\param txt the text
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_set_txt_d(switch_xml_t xml, const char *txt);
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///\brief Sets the given tag attribute or adds a new attribute if not found. A value
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///\ of NULL will remove the specified attribute.
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///\param xml the xml node
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///\param name the attribute name
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///\param value the attribute value
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///\return the tag given
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SWITCH_DECLARE(switch_xml_t) switch_xml_set_attr(switch_xml_t xml, const char *name, const char *value);
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///\brief Wrapper for switch_xml_set_attr() that strdup()s name/value. Value cannot be NULL
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///\param xml the xml node
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///\param name the attribute name
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///\param value the attribute value
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_set_attr_d(switch_xml_t xml, const char *name, const char *value);
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///\brief Wrapper for switch_xml_set_attr() that strdup()s name/value. Value cannot be NULL
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///\param xml the xml node
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///\param name the attribute name
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///\param value the attribute value
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_set_attr_d_buf(switch_xml_t xml, const char *name, const char *value);
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///\brief sets a flag for the given tag and returns the tag
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///\param xml the xml node
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///\param flag the flag to set
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///\return an xml node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_set_flag(switch_xml_t xml, switch_xml_flag_t flag);
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///\brief removes a tag along with its subtags without freeing its memory
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///\param xml the xml node
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SWITCH_DECLARE(switch_xml_t) switch_xml_cut(_In_ switch_xml_t xml);
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///\brief inserts an existing tag into an ezxml structure
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SWITCH_DECLARE(switch_xml_t) switch_xml_insert(_In_ switch_xml_t xml, _In_ switch_xml_t dest, _In_ switch_size_t off);
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///\brief Moves an existing tag to become a subtag of dest at the given offset from
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///\ the start of dest's character content. Returns the moved tag.
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#define switch_xml_move(xml, dest, off) switch_xml_insert(switch_xml_cut(xml), dest, off)
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///\brief removes a tag along with all its subtags
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#define switch_xml_remove(xml) switch_xml_free(switch_xml_cut(xml))
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///\brief set new core xml root
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SWITCH_DECLARE(switch_status_t) switch_xml_set_root(switch_xml_t new_main);
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///\brief Set and alternate function for opening xml root
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SWITCH_DECLARE(switch_status_t) switch_xml_set_open_root_function(switch_xml_open_root_function_t func, void *user_data);
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///\brief open the Core xml root
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///\param reload if it's is already open close it and open it again as soon as permissable (blocking)
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///\param err a pointer to set error strings
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///\return the xml root node or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_open_root(_In_ uint8_t reload, _Out_ const char **err);
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///\brief initilize the core XML backend
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///\param pool a memory pool to use
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///\param err a pointer to set error strings
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///\return SWITCH_STATUS_SUCCESS if successful
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SWITCH_DECLARE(switch_status_t) switch_xml_init(_In_ switch_memory_pool_t *pool, _Out_ const char **err);
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SWITCH_DECLARE(switch_status_t) switch_xml_reload(const char **err);
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SWITCH_DECLARE(switch_status_t) switch_xml_destroy(void);
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///\brief retrieve the core XML root node
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///\return the xml root node
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///\note this will cause a readlock on the root until it's released with \see switch_xml_free
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SWITCH_DECLARE(switch_xml_t) switch_xml_root(void);
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///\brief locate an xml pointer in the core registry
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///\param section the section to look in
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///\param tag_name the type of tag in that section
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///\param key_name the name of the key
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///\param key_value the value of the key
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///\param root a pointer to point at the root node
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///\param node a pointer to the requested node
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///\param params optional URL formatted params to pass to external gateways
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///\return SWITCH_STATUS_SUCCESS if successful root and node will be assigned
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SWITCH_DECLARE(switch_status_t) switch_xml_locate(_In_z_ const char *section,
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_In_opt_z_ const char *tag_name,
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_In_opt_z_ const char *key_name,
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_In_opt_z_ const char *key_value,
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_Out_ switch_xml_t *root,
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_Out_ switch_xml_t *node, _In_opt_ switch_event_t *params, _In_ switch_bool_t clone);
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SWITCH_DECLARE(switch_status_t) switch_xml_locate_domain(_In_z_ const char *domain_name, _In_opt_ switch_event_t *params, _Out_ switch_xml_t *root,
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_Out_ switch_xml_t *domain);
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SWITCH_DECLARE(switch_status_t) switch_xml_locate_group(_In_z_ const char *group_name,
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_In_z_ const char *domain_name,
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_Out_ switch_xml_t *root,
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_Out_ switch_xml_t *domain, _Out_ switch_xml_t *group, _In_opt_ switch_event_t *params);
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SWITCH_DECLARE(switch_status_t) switch_xml_locate_user(_In_z_ const char *key,
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_In_z_ const char *user_name,
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_In_z_ const char *domain_name,
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_In_opt_z_ const char *ip,
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_Out_ switch_xml_t *root, _Out_ switch_xml_t *domain, _Out_ switch_xml_t *user,
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_Out_opt_ switch_xml_t *ingroup, _In_opt_ switch_event_t *params);
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SWITCH_DECLARE(switch_status_t) switch_xml_locate_user_in_domain(_In_z_ const char *user_name, _In_ switch_xml_t domain, _Out_ switch_xml_t *user,
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_Out_opt_ switch_xml_t *ingroup);
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SWITCH_DECLARE(switch_status_t) switch_xml_locate_user_merged(const char *key, const char *user_name, const char *domain_name,
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const char *ip, switch_xml_t *user, switch_event_t *params);
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SWITCH_DECLARE(uint32_t) switch_xml_clear_user_cache(const char *key, const char *user_name, const char *domain_name);
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SWITCH_DECLARE(void) switch_xml_merge_user(switch_xml_t user, switch_xml_t domain, switch_xml_t group);
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SWITCH_DECLARE(switch_xml_t) switch_xml_dup(switch_xml_t xml);
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///\brief open a config in the core registry
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///\param file_path the name of the config section e.g. modules.conf
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///\param node a pointer to point to the node if it is found
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///\param params optional URL formatted params to pass to external gateways
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///\return the root xml node associated with the current request or NULL
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SWITCH_DECLARE(switch_xml_t) switch_xml_open_cfg(_In_z_ const char *file_path, _Out_ switch_xml_t *node, _In_opt_ switch_event_t *params);
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///\brief bind a search function to an external gateway
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///\param function the search function to bind
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///\param sections a bitmask of sections you wil service
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///\param user_data a pointer to private data to be used during the callback
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///\return SWITCH_STATUS_SUCCESS if successful
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///\note gateway functions will be executed in the order they were binded until a success is found else the root registry will be used
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SWITCH_DECLARE(void) switch_xml_set_binding_sections(_In_ switch_xml_binding_t *binding, _In_ switch_xml_section_t sections);
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SWITCH_DECLARE(void) switch_xml_set_binding_user_data(_In_ switch_xml_binding_t *binding, _In_opt_ void *user_data);
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SWITCH_DECLARE(switch_xml_section_t) switch_xml_get_binding_sections(_In_ switch_xml_binding_t *binding);
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SWITCH_DECLARE(void *) switch_xml_get_binding_user_data(_In_ switch_xml_binding_t *binding);
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SWITCH_DECLARE(switch_status_t) switch_xml_bind_search_function_ret(_In_ switch_xml_search_function_t function, _In_ switch_xml_section_t sections,
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_In_opt_ void *user_data, switch_xml_binding_t **ret_binding);
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#define switch_xml_bind_search_function(_f, _s, _u) switch_xml_bind_search_function_ret(_f, _s, _u, NULL)
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SWITCH_DECLARE(switch_status_t) switch_xml_unbind_search_function(_In_ switch_xml_binding_t **binding);
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SWITCH_DECLARE(switch_status_t) switch_xml_unbind_search_function_ptr(_In_ switch_xml_search_function_t function);
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///\brief parse a string for a list of sections
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///\param str a | delimited list of section names
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///\return the section mask
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SWITCH_DECLARE(switch_xml_section_t) switch_xml_parse_section_string(_In_opt_z_ const char *str);
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SWITCH_DECLARE(int) switch_xml_std_datetime_check(switch_xml_t xcond, int *offset, const char *tzname);
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SWITCH_DECLARE(switch_status_t) switch_xml_locate_language(switch_xml_t *root, switch_xml_t *node, switch_event_t *params, switch_xml_t *language, switch_xml_t *phrases, switch_xml_t *macros, const char *str_language);
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SWITCH_END_EXTERN_C
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///\}
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#endif // _SWITCH_XML_H
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/* For Emacs:
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* Local Variables:
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* mode:c
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* indent-tabs-mode:t
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|
* tab-width:4
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* c-basic-offset:4
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* End:
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* For VIM:
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* vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet:
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|
*/
|