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/*!The Treasure Box Library
*
* TBox is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* TBox is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with TBox;
* If not, see <a href="http://www.gnu.org/licenses/"> http://www.gnu.org/licenses/</a>
*
* Copyright (C) 2009 - 2015, ruki All rights reserved.
*
* @author ruki
* @file reader.h
* @ingroup xml
*
*/
#ifndef TB_XML_READER_H
#define TB_XML_READER_H
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
#include "node.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* extern
*/
__tb_extern_c_enter__
/* //////////////////////////////////////////////////////////////////////////////////////
* types
*/
/// the xml reader event type for iterator
typedef enum __tb_xml_reader_event_t
{
TB_XML_READER_EVENT_NONE = 0
, TB_XML_READER_EVENT_DOCUMENT_TYPE = 1
, TB_XML_READER_EVENT_DOCUMENT = 2
, TB_XML_READER_EVENT_ELEMENT_BEG = 3
, TB_XML_READER_EVENT_ELEMENT_END = 4
, TB_XML_READER_EVENT_ELEMENT_EMPTY = 5
, TB_XML_READER_EVENT_COMMENT = 6
, TB_XML_READER_EVENT_TEXT = 7
, TB_XML_READER_EVENT_CDATA = 8
}tb_xml_reader_event_t;
/// the xml reader ref type
typedef struct{}* tb_xml_reader_ref_t;
/* //////////////////////////////////////////////////////////////////////////////////////
* interfaces
*/
/*! init the xml reader
*
* @return the reader
*/
tb_xml_reader_ref_t tb_xml_reader_init(tb_noarg_t);
/*! exit the xml reader
*
* @param reader the xml reader
*/
tb_void_t tb_xml_reader_exit(tb_xml_reader_ref_t reader);
/*! open the xml reader
*
* @param reader the xml reader
* @param stream the stream, will open it if be not opened
* @param bowner the xml reader is owner of the stream?
*
* @return tb_true or tb_false
*/
tb_bool_t tb_xml_reader_open(tb_xml_reader_ref_t reader, tb_stream_ref_t stream, tb_bool_t bowner);
/*! clos the xml reader
*
* @param reader the xml reader
*/
tb_void_t tb_xml_reader_clos(tb_xml_reader_ref_t reader);
/*! the next iterator for the xml reader
*
* @param reader the xml reader
* @return the iterator event
*
* @code
*
// init reader
tb_xml_reader_ref_t reader = tb_xml_reader_init();
if (reader)
{
// open reader
if (tb_xml_reader_open(reader, tb_stream_init_from_url(argv[1]), tb_true))
{
// goto
tb_bool_t ok = tb_true;
if (argv[2]) ok = tb_xml_reader_goto(reader, argv[2]);
// walk
tb_size_t event = TB_XML_READER_EVENT_NONE;
while (ok && (event = tb_xml_reader_next(reader)))
{
switch (event)
{
case TB_XML_READER_EVENT_DOCUMENT:
{
tb_printf("<?xml version = \"%s\" encoding = \"%s\" ?>\n"
, tb_xml_reader_version(reader), tb_xml_reader_charset(reader));
}
break;
case TB_XML_READER_EVENT_DOCUMENT_TYPE:
{
tb_printf("<!DOCTYPE>\n");
}
break;
case TB_XML_READER_EVENT_ELEMENT_EMPTY:
{
tb_char_t const* name = tb_xml_reader_element(reader);
tb_xml_node_ref_t attr = tb_xml_reader_attributes(reader);
tb_size_t t = tb_xml_reader_level(reader);
while (t--) tb_printf("\t");
if (!attr) tb_printf("<%s/>\n", name);
else
{
tb_printf("<%s", name);
for (; attr; attr = attr->next)
tb_printf(" %s = \"%s\"", tb_string_cstr(&attr->name), tb_string_cstr(&attr->data));
tb_printf("/>\n");
}
}
break;
case TB_XML_READER_EVENT_ELEMENT_BEG:
{
tb_char_t const* name = tb_xml_reader_element(reader);
tb_xml_node_ref_t attr = tb_xml_reader_attributes(reader);
tb_size_t t = tb_xml_reader_level(reader) - 1;
while (t--) tb_printf("\t");
if (!attr) tb_printf("<%s>\n", name);
else
{
tb_printf("<%s", name);
for (; attr; attr = attr->next)
tb_printf(" %s = \"%s\"", tb_string_cstr(&attr->name), tb_string_cstr(&attr->data));
tb_printf(">\n");
}
}
break;
case TB_XML_READER_EVENT_ELEMENT_END:
{
tb_size_t t = tb_xml_reader_level(reader);
while (t--) tb_printf("\t");
tb_printf("</%s>\n", tb_xml_reader_element(reader));
}
break;
case TB_XML_READER_EVENT_TEXT:
{
tb_size_t t = tb_xml_reader_level(reader);
while (t--) tb_printf("\t");
tb_printf("%s", tb_xml_reader_text(reader));
tb_printf("\n");
}
break;
case TB_XML_READER_EVENT_CDATA:
{
tb_size_t t = tb_xml_reader_level(reader);
while (t--) tb_printf("\t");
tb_printf("<![CDATA[%s]]>", tb_xml_reader_cdata(reader));
tb_printf("\n");
}
break;
case TB_XML_READER_EVENT_COMMENT:
{
tb_size_t t = tb_xml_reader_level(reader);
while (t--) tb_printf("\t");
tb_printf("<!--%s-->", tb_xml_reader_comment(reader));
tb_printf("\n");
}
break;
default:
break;
}
}
}
// exit reader
tb_xml_reader_exit(reader);
}
* @endcode
*/
tb_size_t tb_xml_reader_next(tb_xml_reader_ref_t reader);
/*! the xml stream
*
* @param reader the xml reader
* @return the xml stream
*/
tb_stream_ref_t tb_xml_reader_stream(tb_xml_reader_ref_t reader);
/*! the xml level
*
* @param reader the xml reader
* @return the xml level for tab spaces
*/
tb_size_t tb_xml_reader_level(tb_xml_reader_ref_t reader);
/*! seek to the given node for xml, .e.g /root/node/item
*
* @param reader the reader handle
* @param path the xml path
* @return tb_true or tb_false
*
* @note the stream will be reseted
*/
tb_bool_t tb_xml_reader_goto(tb_xml_reader_ref_t reader, tb_char_t const* path);
/*! load the xml
*
* @param reader the xml reader
* @return the xml root node
*/
tb_xml_node_ref_t tb_xml_reader_load(tb_xml_reader_ref_t reader);
/*! the xml version
*
* @param reader the xml reader
* @return the xml version
*/
tb_char_t const* tb_xml_reader_version(tb_xml_reader_ref_t reader);
/*! the xml charset
*
* @param reader the xml reader
* @return the xml charset
*/
tb_char_t const* tb_xml_reader_charset(tb_xml_reader_ref_t reader);
/*! the current xml element name
*
* @param reader the xml reader
* @return the current xml element name
*/
tb_char_t const* tb_xml_reader_element(tb_xml_reader_ref_t reader);
/*! the current xml node text
*
* @param reader the xml reader
* @return the current xml node text
*/
tb_char_t const* tb_xml_reader_text(tb_xml_reader_ref_t reader);
/*! the current xml node cdata
*
* @param reader the xml reader
* @return the current xml node cdata
*/
tb_char_t const* tb_xml_reader_cdata(tb_xml_reader_ref_t reader);
/*! the current xml node comment
*
* @param reader the xml reader
* @return the current xml node comment
*/
tb_char_t const* tb_xml_reader_comment(tb_xml_reader_ref_t reader);
/*! the xml document type
*
* @param reader the xml reader
* @return the xml document type
*/
tb_char_t const* tb_xml_reader_doctype(tb_xml_reader_ref_t reader);
/*! the current xml node attributes
*
* @param reader the xml reader
* @return the current xml node attributes
*/
tb_xml_node_ref_t tb_xml_reader_attributes(tb_xml_reader_ref_t reader);
/* //////////////////////////////////////////////////////////////////////////////////////
* extern
*/
__tb_extern_c_leave__
#endif
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