2 * \file easyxml.cxx - implementation of EasyXML interfaces.
3 * Written by David Megginson, 2000-2001
4 * This file is in the Public Domain, and comes with NO WARRANTY of any kind.
8 # include <simgear_config.h>
11 #include <simgear/compiler.h>
13 #include <string.h> // strcmp()
15 #include "easyxml.hxx"
20 # include "xmlparse.h"
30 ////////////////////////////////////////////////////////////////////////
31 // Implementation of XMLAttributes.
32 ////////////////////////////////////////////////////////////////////////
34 XMLAttributes::XMLAttributes ()
38 XMLAttributes::~XMLAttributes ()
43 XMLAttributes::findAttribute (const char * name) const
46 for (int i = 0; i < s; i++) {
47 if (strcmp(name, getName(i)) == 0)
54 XMLAttributes::hasAttribute (const char * name) const
56 return (findAttribute(name) != -1);
60 XMLAttributes::getValue (const char * name) const
62 int pos = findAttribute(name);
70 ////////////////////////////////////////////////////////////////////////
71 // Implementation of XMLAttributesDefault.
72 ////////////////////////////////////////////////////////////////////////
74 XMLAttributesDefault::XMLAttributesDefault ()
78 XMLAttributesDefault::XMLAttributesDefault (const XMLAttributes &atts)
81 for (int i = 0; i < s; i++)
82 addAttribute(atts.getName(i), atts.getValue(i));
85 XMLAttributesDefault::~XMLAttributesDefault ()
90 XMLAttributesDefault::size () const
92 return _atts.size() / 2;
96 XMLAttributesDefault::getName (int i) const
98 return _atts[i*2].c_str();
102 XMLAttributesDefault::getValue (int i) const
104 return _atts[i*2+1].c_str();
108 XMLAttributesDefault::addAttribute (const char * name, const char * value)
110 _atts.push_back(name);
111 _atts.push_back(value);
115 XMLAttributesDefault::setName (int i, const char * name)
121 XMLAttributesDefault::setValue (int i, const char * name)
127 XMLAttributesDefault::setValue (const char * name, const char * value)
129 int pos = findAttribute(name);
132 setValue(pos, value);
134 addAttribute(name, value);
140 ////////////////////////////////////////////////////////////////////////
141 // Attribute list wrapper for Expat.
142 ////////////////////////////////////////////////////////////////////////
145 ExpatAtts::size () const
148 for (int i = 0; _atts[i] != 0; i += 2)
154 ExpatAtts::getName (int i) const
160 ExpatAtts::getValue (int i) const
166 ExpatAtts::getValue (const char * name) const
168 return XMLAttributes::getValue(name);
172 ////////////////////////////////////////////////////////////////////////
173 // Static callback functions for Expat.
174 ////////////////////////////////////////////////////////////////////////
176 #define VISITOR (*((XMLVisitor *)userData))
179 start_element (void * userData, const char * name, const char ** atts)
181 VISITOR.startElement(name, ExpatAtts(atts));
185 end_element (void * userData, const char * name)
187 VISITOR.endElement(name);
191 character_data (void * userData, const char * s, int len)
193 VISITOR.data(s, len);
197 processing_instruction (void * userData,
201 VISITOR.pi(target, data);
208 ////////////////////////////////////////////////////////////////////////
209 // Implementation of XMLReader.
210 ////////////////////////////////////////////////////////////////////////
213 readXML (istream &input, XMLVisitor &visitor, const string &path)
215 XML_Parser parser = XML_ParserCreate(0);
216 XML_SetUserData(parser, &visitor);
217 XML_SetElementHandler(parser, start_element, end_element);
218 XML_SetCharacterDataHandler(parser, character_data);
219 XML_SetProcessingInstructionHandler(parser, processing_instruction);
224 while (!input.eof()) {
226 // FIXME: get proper error string from system
228 sg_io_exception ex ("Problem reading file",
230 XML_GetCurrentLineNumber(parser),
231 XML_GetCurrentColumnNumber(parser)),
232 "SimGear XML Parser");
233 XML_ParserFree(parser);
237 input.read(buf,16384);
238 if (!XML_Parse(parser, buf, input.gcount(), false)) {
239 sg_io_exception ex (XML_ErrorString(XML_GetErrorCode(parser)),
241 XML_GetCurrentLineNumber(parser),
242 XML_GetCurrentColumnNumber(parser)),
243 "SimGear XML Parser");
244 XML_ParserFree(parser);
250 // Verify end of document.
251 if (!XML_Parse(parser, buf, 0, true)) {
252 sg_io_exception ex (XML_ErrorString(XML_GetErrorCode(parser)),
254 XML_GetCurrentLineNumber(parser),
255 XML_GetCurrentColumnNumber(parser)),
256 "SimGear XML Parser");
257 XML_ParserFree(parser);
261 XML_ParserFree(parser);
266 readXML (const string &path, XMLVisitor &visitor)
268 ifstream input(path.c_str());
271 readXML(input, visitor, path);
272 } catch (sg_io_exception &) {
275 } catch (sg_throwable &) {
280 throw sg_io_exception("Failed to open file", sg_location(path),
281 "SimGear XML Parser");
287 readXML (const char *buf, const int size, XMLVisitor &visitor)
289 XML_Parser parser = XML_ParserCreate(0);
290 XML_SetUserData(parser, &visitor);
291 XML_SetElementHandler(parser, start_element, end_element);
292 XML_SetCharacterDataHandler(parser, character_data);
293 XML_SetProcessingInstructionHandler(parser, processing_instruction);
297 if (!XML_Parse(parser, buf, size, false)) {
298 sg_io_exception ex (XML_ErrorString(XML_GetErrorCode(parser)),
299 sg_location("In-memory XML buffer",
300 XML_GetCurrentLineNumber(parser),
301 XML_GetCurrentColumnNumber(parser)),
302 "SimGear XML Parser");
303 XML_ParserFree(parser);
307 XML_ParserFree(parser);
311 // end of easyxml.cxx