mirror of
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118eed485e
All usages of "type" to refer to classes were renamed to "class" ClassDB has been exposed to GDScript. OBJ_TYPE() macro is now GDCLASS()
593 lines
13 KiB
C++
593 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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ClassDB::bind_method(_MD("read"),&XMLParser::read);
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ClassDB::bind_method(_MD("get_node_type"),&XMLParser::get_node_type);
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ClassDB::bind_method(_MD("get_node_name"),&XMLParser::get_node_name);
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ClassDB::bind_method(_MD("get_node_data"),&XMLParser::get_node_data);
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ClassDB::bind_method(_MD("get_node_offset"),&XMLParser::get_node_offset);
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ClassDB::bind_method(_MD("get_attribute_count"),&XMLParser::get_attribute_count);
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ClassDB::bind_method(_MD("get_attribute_name","idx"),&XMLParser::get_attribute_name);
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ClassDB::bind_method(_MD("get_attribute_value","idx"),(String (XMLParser::*)(int) const) &XMLParser::get_attribute_value);
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ClassDB::bind_method(_MD("has_attribute","name"),&XMLParser::has_attribute);
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ClassDB::bind_method(_MD("get_named_attribute_value","name"), (String (XMLParser::*)(const String&) const) &XMLParser::get_attribute_value);
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ClassDB::bind_method(_MD("get_named_attribute_value_safe","name"), &XMLParser::get_attribute_value_safe);
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ClassDB::bind_method(_MD("is_empty"),&XMLParser::is_empty);
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ClassDB::bind_method(_MD("get_current_line"),&XMLParser::get_current_line);
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ClassDB::bind_method(_MD("skip_section"),&XMLParser::skip_section);
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ClassDB::bind_method(_MD("seek","pos"),&XMLParser::seek);
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ClassDB::bind_method(_MD("open","file"),&XMLParser::open);
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ClassDB::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;");
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special_characters.push_back("'apos;");
|
|
|
|
|
|
}
|
|
XMLParser::~XMLParser() {
|
|
|
|
|
|
if (data)
|
|
memdelete_arr(data);
|
|
}
|