c7bc44d5ad
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer with state-of-the-art rendering techniques tuned to work as low as middle end handheld devices - without compromising with the possibilities given for higher end desktop games of course. Great times ahead for the Godot community and the gamers that will play our games!
592 lines
13 KiB
C++
592 lines
13 KiB
C++
/*************************************************************************/
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/* xml_parser.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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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 */
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/* included 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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#include "xml_parser.h"
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#include "print_string.h"
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//#define DEBUG_XML
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VARIANT_ENUM_CAST(XMLParser::NodeType);
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static bool _equalsn(const CharType* str1, const CharType* str2, int len) {
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int i;
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for(i=0; i < len && str1[i] && str2[i] ; ++i)
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if (str1[i] != str2[i])
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return false;
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// if one (or both) of the strings was smaller then they
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// are only equal if they have the same lenght
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return (i == len) || (str1[i] == 0 && str2[i] == 0);
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}
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String XMLParser::_replace_special_characters(const String& origstr) {
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int pos = origstr.find("&");
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int oldPos = 0;
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if (pos == -1)
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return origstr;
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String newstr;
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while(pos != -1 && pos < origstr.length()-2) {
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// check if it is one of the special characters
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int specialChar = -1;
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for (int i=0; i<(int)special_characters.size(); ++i)
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{
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const CharType* p = &origstr[pos]+1;
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if (_equalsn(&special_characters[i][1], p, special_characters[i].length()-1))
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{
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specialChar = i;
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break;
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}
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}
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if (specialChar != -1)
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{
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newstr+=(origstr.substr(oldPos, pos - oldPos));
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newstr+=(special_characters[specialChar][0]);
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pos += special_characters[specialChar].length();
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}
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else
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{
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newstr+=(origstr.substr(oldPos, pos - oldPos + 1));
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pos += 1;
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}
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// find next &
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oldPos = pos;
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pos = origstr.find("&", pos);
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}
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if (oldPos < origstr.length()-1)
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newstr+=(origstr.substr(oldPos, origstr.length()-oldPos));
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return newstr;
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}
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static inline bool _is_white_space(char c)
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{
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return (c==' ' || c=='\t' || c=='\n' || c=='\r');
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}
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//! sets the state that text was found. Returns true if set should be set
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bool XMLParser::_set_text(char* start, char* end) {
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// check if text is more than 2 characters, and if not, check if there is
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// only white space, so that this text won't be reported
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if (end - start < 3)
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{
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char* p = start;
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for(; p != end; ++p)
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if (!_is_white_space(*p))
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break;
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if (p == end)
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return false;
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}
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// set current text to the parsed text, and replace xml special characters
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String s = String::utf8(start, (int)(end - start));
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node_name = _replace_special_characters(s);
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// current XML node type is text
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node_type = NODE_TEXT;
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return true;
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}
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void XMLParser::_parse_closing_xml_element() {
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node_type = NODE_ELEMENT_END;
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node_empty = false;
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attributes.clear();
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++P;
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const char* pBeginClose = P;
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while(*P != '>')
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++P;
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node_name = String::utf8(pBeginClose, (int)(P - pBeginClose));
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#ifdef DEBUG_XML
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print_line("XML CLOSE: "+node_name);
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#endif
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++P;
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}
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void XMLParser::_ignore_definition() {
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node_type = NODE_UNKNOWN;
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char *F=P;
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// move until end marked with '>' reached
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while(*P != '>')
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++P;
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node_name.parse_utf8(F,P-F);
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++P;
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}
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bool XMLParser::_parse_cdata() {
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if (*(P+1) != '[')
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return false;
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node_type = NODE_CDATA;
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// skip '<![CDATA['
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int count=0;
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while( *P && count<8 )
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{
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++P;
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++count;
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}
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if (!*P)
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return true;
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char *cDataBegin = P;
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char *cDataEnd = 0;
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// find end of CDATA
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while(*P && !cDataEnd) {
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if (*P == '>' &&
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(*(P-1) == ']') &&
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(*(P-2) == ']'))
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{
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cDataEnd = P - 2;
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}
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++P;
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}
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if ( cDataEnd )
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node_name = String::utf8(cDataBegin, (int)(cDataEnd - cDataBegin));
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else
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node_name = "";
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#ifdef DEBUG_XML
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print_line("XML CDATA: "+node_name);
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#endif
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return true;
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}
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void XMLParser::_parse_comment() {
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node_type = NODE_COMMENT;
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P += 1;
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char *pCommentBegin = P;
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int count = 1;
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// move until end of comment reached
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while(count)
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{
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if (*P == '>')
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--count;
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else
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if (*P == '<')
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++count;
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++P;
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}
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P -= 3;
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node_name = String::utf8(pCommentBegin+2, (int)(P - pCommentBegin-2));
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P += 3;
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#ifdef DEBUG_XML
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print_line("XML COMMENT: "+node_name);
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#endif
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}
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void XMLParser::_parse_opening_xml_element() {
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node_type = NODE_ELEMENT;
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node_empty = false;
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attributes.clear();
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// find name
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const char* startName = P;
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// find end of element
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while(*P != '>' && !_is_white_space(*P))
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++P;
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const char* endName = P;
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// find attributes
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while(*P != '>')
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{
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if (_is_white_space(*P))
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++P;
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else
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{
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if (*P != '/')
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{
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// we've got an attribute
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// read the attribute names
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const char* attributeNameBegin = P;
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while(!_is_white_space(*P) && *P != '=')
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++P;
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const char* attributeNameEnd = P;
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++P;
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// read the attribute value
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// check for quotes and single quotes, thx to murphy
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while( (*P != '\"') && (*P != '\'') && *P)
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++P;
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if (!*P) // malformatted xml file
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return;
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const char attributeQuoteChar = *P;
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++P;
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const char* attributeValueBegin = P;
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while(*P != attributeQuoteChar && *P)
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++P;
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if (!*P) // malformatted xml file
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return;
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const char* attributeValueEnd = P;
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++P;
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Attribute attr;
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attr.name = String::utf8(attributeNameBegin,
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(int)(attributeNameEnd - attributeNameBegin));
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String s =String::utf8(attributeValueBegin,
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(int)(attributeValueEnd - attributeValueBegin));
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attr.value = _replace_special_characters(s);
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attributes.push_back(attr);
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}
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else
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{
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// tag is closed directly
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++P;
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node_empty = true;
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break;
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}
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}
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}
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// check if this tag is closing directly
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if (endName > startName && *(endName-1) == '/')
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{
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// directly closing tag
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node_empty = true;
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endName--;
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}
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node_name = String::utf8(startName, (int)(endName - startName));
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#ifdef DEBUG_XML
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print_line("XML OPEN: "+node_name);
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#endif
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++P;
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}
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void XMLParser::_parse_current_node() {
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char* start = P;
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node_offset = P - data;
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// more forward until '<' found
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while(*P != '<' && *P)
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++P;
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if (!*P)
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return;
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if (P - start > 0)
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{
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// we found some text, store it
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if (_set_text(start, P))
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return;
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}
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++P;
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// based on current token, parse and report next element
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switch(*P)
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{
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case '/':
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_parse_closing_xml_element();
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break;
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case '?':
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_ignore_definition();
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break;
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case '!':
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if (!_parse_cdata())
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_parse_comment();
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break;
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default:
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_parse_opening_xml_element();
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break;
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}
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}
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uint64_t XMLParser::get_node_offset() const {
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return node_offset;
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};
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Error XMLParser::seek(uint64_t p_pos) {
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ERR_FAIL_COND_V(!data, ERR_FILE_EOF)
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ERR_FAIL_COND_V(p_pos >= length, ERR_FILE_EOF);
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P = data + p_pos;
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return read();
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};
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void XMLParser::_bind_methods() {
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ObjectTypeDB::bind_method(_MD("read"),&XMLParser::read);
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ObjectTypeDB::bind_method(_MD("get_node_type"),&XMLParser::get_node_type);
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ObjectTypeDB::bind_method(_MD("get_node_name"),&XMLParser::get_node_name);
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ObjectTypeDB::bind_method(_MD("get_node_data"),&XMLParser::get_node_data);
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ObjectTypeDB::bind_method(_MD("get_node_offset"),&XMLParser::get_node_offset);
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ObjectTypeDB::bind_method(_MD("get_attribute_count"),&XMLParser::get_attribute_count);
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ObjectTypeDB::bind_method(_MD("get_attribute_name","idx"),&XMLParser::get_attribute_name);
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ObjectTypeDB::bind_method(_MD("get_attribute_value","idx"),(String (XMLParser::*)(int) const) &XMLParser::get_attribute_value);
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ObjectTypeDB::bind_method(_MD("has_attribute","name"),&XMLParser::has_attribute);
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ObjectTypeDB::bind_method(_MD("get_named_attribute_value","name"), (String (XMLParser::*)(const String&) const) &XMLParser::get_attribute_value);
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ObjectTypeDB::bind_method(_MD("get_named_attribute_value_safe","name"), &XMLParser::get_attribute_value_safe);
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ObjectTypeDB::bind_method(_MD("is_empty"),&XMLParser::is_empty);
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ObjectTypeDB::bind_method(_MD("get_current_line"),&XMLParser::get_current_line);
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ObjectTypeDB::bind_method(_MD("skip_section"),&XMLParser::skip_section);
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ObjectTypeDB::bind_method(_MD("seek","pos"),&XMLParser::seek);
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ObjectTypeDB::bind_method(_MD("open","file"),&XMLParser::open);
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ObjectTypeDB::bind_method(_MD("open_buffer","buffer"),&XMLParser::open_buffer);
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BIND_CONSTANT( NODE_NONE );
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BIND_CONSTANT( NODE_ELEMENT );
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BIND_CONSTANT( NODE_ELEMENT_END );
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BIND_CONSTANT( NODE_TEXT );
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BIND_CONSTANT( NODE_COMMENT );
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BIND_CONSTANT( NODE_CDATA );
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BIND_CONSTANT( NODE_UNKNOWN );
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};
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Error XMLParser::read() {
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// if not end reached, parse the node
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if (P && (P - data) < length - 1 && *P != 0)
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{
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_parse_current_node();
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return OK;
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}
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return ERR_FILE_EOF;
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}
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XMLParser::NodeType XMLParser::get_node_type() {
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return node_type;
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}
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String XMLParser::get_node_data() const {
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ERR_FAIL_COND_V( node_type != NODE_TEXT, "");
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return node_name;
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}
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String XMLParser::get_node_name() const {
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ERR_FAIL_COND_V( node_type == NODE_TEXT, "");
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return node_name;
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}
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int XMLParser::get_attribute_count() const {
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return attributes.size();
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}
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String XMLParser::get_attribute_name(int p_idx) const {
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ERR_FAIL_INDEX_V(p_idx,attributes.size(),"");
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return attributes[p_idx].name;
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}
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String XMLParser::get_attribute_value(int p_idx) const {
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ERR_FAIL_INDEX_V(p_idx,attributes.size(),"");
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return attributes[p_idx].value;
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}
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bool XMLParser::has_attribute(const String& p_name) const {
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for(int i=0;i<attributes.size();i++) {
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if (attributes[i].name==p_name)
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return true;
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}
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return false;
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}
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String XMLParser::get_attribute_value(const String& p_name) const {
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int idx=-1;
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for(int i=0;i<attributes.size();i++) {
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if (attributes[i].name==p_name) {
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idx=i;
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break;
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}
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}
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if (idx<0) {
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ERR_EXPLAIN("Attribute not found: "+p_name);
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}
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ERR_FAIL_COND_V(idx<0,"");
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return attributes[idx].value;
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}
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String XMLParser::get_attribute_value_safe(const String& p_name) const {
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int idx=-1;
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for(int i=0;i<attributes.size();i++) {
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if (attributes[i].name==p_name) {
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idx=i;
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break;
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}
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}
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if (idx<0)
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return "";
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return attributes[idx].value;
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}
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bool XMLParser::is_empty() const {
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return node_empty;
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}
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Error XMLParser::open_buffer(const Vector<uint8_t>& p_buffer) {
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ERR_FAIL_COND_V(p_buffer.size()==0,ERR_INVALID_DATA);
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length = p_buffer.size();
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data = memnew_arr( char, length+1);
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copymem(data,p_buffer.ptr(),length);
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data[length]=0;
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P=data;
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return OK;
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}
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Error XMLParser::open(const String& p_path) {
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Error err;
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FileAccess * file = FileAccess::open(p_path,FileAccess::READ,&err);
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if (err) {
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ERR_FAIL_COND_V(err!=OK,err);
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}
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length = file->get_len();
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ERR_FAIL_COND_V(length<1, ERR_FILE_CORRUPT);
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data = memnew_arr( char, length+1);
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file->get_buffer((uint8_t*)data,length);
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data[length]=0;
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P=data;
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memdelete(file);
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return OK;
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}
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void XMLParser::skip_section() {
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// skip if this element is empty anyway.
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if (is_empty())
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return;
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// read until we've reached the last element in this section
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int tagcount = 1;
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while(tagcount && read()==OK)
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{
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if (get_node_type() == XMLParser::NODE_ELEMENT &&
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!is_empty())
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{
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++tagcount;
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}
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else
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if (get_node_type() == XMLParser::NODE_ELEMENT_END)
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--tagcount;
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}
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}
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void XMLParser::close() {
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if (data)
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memdelete_arr(data);
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data=NULL;
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length=0;
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P=NULL;
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node_empty=false;
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node_type=NODE_NONE;
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node_offset = 0;
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}
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int XMLParser::get_current_line() const {
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return 0;
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}
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XMLParser::XMLParser() {
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data=NULL;
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close();
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special_characters.push_back("&");
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special_characters.push_back("<lt;");
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special_characters.push_back(">gt;");
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special_characters.push_back("\"quot;");
|
|
special_characters.push_back("'apos;");
|
|
|
|
|
|
}
|
|
XMLParser::~XMLParser() {
|
|
|
|
|
|
if (data)
|
|
memdelete_arr(data);
|
|
}
|