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443 lines
8.7 KiB
C++
443 lines
8.7 KiB
C++
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//
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// XML storage C++ classes version 1.3
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//
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// Copyright (c) 2006, 2007, 2008, 2009 Martin Fuchs <martin-fuchs@gmx.net>
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//
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/// \file xs-native.cpp
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/// native internal XMLStorage parser
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/*
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <precomp.h>
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#ifndef XS_NO_COMMENT
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#define XS_NO_COMMENT // no #pragma comment(lib, ...) statements in .lib files to enable static linking
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#endif
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//#include "xmlstorage.h"
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#if !defined(XS_USE_EXPAT) && !defined(XS_USE_XERCES)
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namespace XMLStorage {
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XMLReaderBase::~XMLReaderBase()
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{
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}
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/// read XML stream into XML tree below _pos
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void XMLReaderBase::read()
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{
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if (!parse()) {
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XMLError error;
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error._message = "XML parsing error";
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//error._line = ;
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//error._column = ;
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_errors.push_back(error);
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}
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finish_read();
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}
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/// line buffer for XS-native parser
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struct Buffer
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{
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Buffer()
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{
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_buffer = (char*) malloc(BUFFER_LEN);
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_len = BUFFER_LEN;
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reset();
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}
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~Buffer()
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{
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free(_buffer);
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}
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void reset()
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{
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_wptr = _buffer;
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_buffer_str.erase();
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}
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void append(int c)
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{
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size_t wpos = _wptr-_buffer;
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if (wpos >= _len) {
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_len <<= 1;
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_buffer = (char*) realloc(_buffer, _len);
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_wptr = _buffer + wpos;
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}
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*_wptr++ = static_cast<char>(c);
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}
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const std::string& str(bool utf8) // returns UTF-8 encoded buffer content
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{
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#if defined(_WIN32) && !defined(XS_STRING_UTF8)
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if (utf8)
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#endif
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_buffer_str.assign(_buffer, _wptr-_buffer);
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#if defined(_WIN32) && !defined(XS_STRING_UTF8)
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else
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_buffer_str = get_utf8(_buffer, _wptr-_buffer);
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#endif
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return _buffer_str;
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}
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size_t len() const
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{
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return _wptr - _buffer;
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}
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bool has_CDEnd() const
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{
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//if (_wptr-_buffer < 3)
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// return false;
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return !strncmp(_wptr-3, CDATA_END, 3);
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}
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XS_String get_tag() const
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{
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const char* p = _buffer_str.c_str();
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if (*p == '<')
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++p;
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if (*p == '/')
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++p;
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const char* q = p;
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if (*q == '?')
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++q;
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q = get_xmlsym_end_utf8(q);
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#ifdef XS_STRING_UTF8
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return XS_String(p, q-p);
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#else
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XS_String tag;
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assign_utf8(tag, p, q-p);
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return tag;
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#endif
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}
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/// read attributes and values
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void get_attributes(XMLNode::AttributeMap& attributes) const
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{
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const char* p = _buffer_str.c_str();
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// find end of tag name
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if (*p == '<')
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++p;
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if (*p == '/')
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++p;
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else if (*p == '?')
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++p;
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p = get_xmlsym_end_utf8(p);
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// read attributes from buffer
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while(*p && *p!='>' && *p!='/') {
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while(isspace((unsigned char)*p))
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++p;
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const char* attr_name = p;
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p = get_xmlsym_end_utf8(p);
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if (*p != '=')
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break; //@TODO error handling
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size_t attr_len = p - attr_name;
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if (*++p!='"' && *p!='\'')
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break; //@TODO error handling
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char delim = *p;
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const char* value = ++p;
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while(*p && *p!=delim)
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++p;
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size_t value_len = p - value;
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if (*p)
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++p; // '"'
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#ifdef XS_STRING_UTF8
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XS_String name_str(attr_name, attr_len);
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#else
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XS_String name_str;
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assign_utf8(name_str, attr_name, attr_len);
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#endif
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attributes[name_str] = DecodeXMLString(std::string(value, value_len));
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}
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}
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protected:
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char* _buffer;
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char* _wptr;
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size_t _len;
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std::string _buffer_str; // UTF-8 encoded
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};
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bool XMLReaderBase::parse()
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{
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Buffer buffer;
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int c = get();
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bool in_comment = false;
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while(c != EOF) {
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if (in_comment || c=='<') {
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buffer.append(c);
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// read start or end tag
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for(;;) {
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c = get();
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if (c == EOF)
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break;
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buffer.append(c);
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if (c == '>')
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break;
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}
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const std::string& b = buffer.str(_utf8);
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const char* str = b.c_str();
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if (in_comment || !strncmp(str+1, "!--", 3)) {
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// XML comment
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DefaultHandler(b);
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if (strcmp(str+b.length()-3, "-->"))
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in_comment = true;
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else
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in_comment = false;
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c = get();
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} else if (str[1] == '/') {
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// end tag
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/*@TODO error handling
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const XS_String& tag = buffer.get_tag();
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if (tag != last_opened_tag) {
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ERROR
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}
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*/
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EndElementHandler();
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c = get();
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} else if (str[1] == '?') {
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// XML declaration
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const XS_String& tag = buffer.get_tag();
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if (tag == "?xml") {
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XMLNode::AttributeMap attributes;
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buffer.get_attributes(attributes);
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const std::string& version = attributes.get("version");
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const std::string& encoding = attributes.get("encoding");
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int standalone;
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XMLNode::AttributeMap::const_iterator found = // const_cast for ISO C++ compatibility error of GCC
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const_cast<const XMLNode::AttributeMap&>(attributes).find("standalone");
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if (found != attributes.end())
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standalone = !XS_icmp(found->second.c_str(), XS_TEXT("yes"));
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else
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standalone = -1;
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XmlDeclHandler(version.empty()?NULL:version.c_str(), encoding.empty()?NULL:encoding.c_str(), standalone);
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if (!encoding.empty() && !_stricmp(encoding.c_str(), "utf-8"))
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_utf8 = true;
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c = eat_endl();
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} else if (tag == "?xml-stylesheet") {
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XMLNode::AttributeMap attributes;
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buffer.get_attributes(attributes);
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StyleSheet stylesheet(attributes.get("href"), attributes.get("type"), !XS_icmp(attributes.get("alternate"), XS_TEXT("yes")));
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stylesheet._title = attributes.get("title");
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stylesheet._media = attributes.get("media");
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stylesheet._charset = attributes.get("charset");
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_format._stylesheets.push_back(stylesheet);
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c = eat_endl();
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} else {
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DefaultHandler(b);
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c = get();
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}
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} else if (str[1] == '!') {
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if (!strncmp(str+2, "DOCTYPE ", 8)) {
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_format._doctype.parse(str+10);
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c = eat_endl();
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} else if (!strncmp(str+2, "[CDATA[", 7)) { // see CDATA_START
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// parse <![CDATA[ ... ]]> strings
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while(!buffer.has_CDEnd()) {
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c = get();
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if (c == EOF)
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break;
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buffer.append(c);
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}
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DefaultHandler(buffer.str(_utf8));
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c = get();
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}
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} else {
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// start tag
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const XS_String& tag = buffer.get_tag();
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if (!tag.empty()) {
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XMLNode::AttributeMap attributes;
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buffer.get_attributes(attributes);
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StartElementHandler(tag, attributes);
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if (str[b.length()-2] == '/')
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EndElementHandler();
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}
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c = get();
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}
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} else {
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buffer.append(c);
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// read white space
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for(;;) {
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// check for the encoding of the first line end
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if (!_endl_defined) {
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if (c == '\n') {
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_format._endl = "\n";
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_endl_defined = true;
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} else if (c == '\r') {
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_format._endl = "\r\n";
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_endl_defined = true;
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}
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}
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c = get();
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if (c == EOF)
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break;
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if (c == '<')
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break;
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buffer.append(c);
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}
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DefaultHandler(buffer.str(_utf8));
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}
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buffer.reset();
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}
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return true; //TODO return false on invalid XML
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}
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int XMLReaderBase::eat_endl()
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{
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int c = get();
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if (c == '\r')
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c = get();
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if (c == '\n')
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c = get();
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return c;
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}
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/// return current parser position as string
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std::string XMLReaderBase::get_position() const
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{
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/*@TODO display parser position in case of errors
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int line = XML_GetCurrentLineNumber(_parser);
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int column = XML_GetCurrentColumnNumber(_parser);
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std::ostringstream out;
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out << "(" << line << ") : [column " << column << "]";
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return out.str();
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*/
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return "";
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}
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#ifdef XMLNODE_LOCATION
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XMLLocation XMLReaderBase::get_location() const
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{
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return XMLLocation(); //@TODO XMLLocation for XS-native
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}
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std::string XMLLocation::str() const
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{
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return ""; //TODO
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}
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#endif
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/// store content, white space and comments
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void XMLReaderBase::DefaultHandler(const std::string& s)
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{
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_content.append(s);
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}
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} // namespace XMLStorage
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#endif // !defined(XS_USE_EXPAT) && !defined(XS_USE_XERCES)
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