528 lines
16 KiB
C++
528 lines
16 KiB
C++
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/*
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* Copyright (c) 2020-2021 Samsung Electronics Co., Ltd. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <ctype.h>
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#include <string>
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#ifdef _WIN32
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#include <malloc.h>
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#else
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#include <alloca.h>
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#endif
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#include "tvgXmlParser.h"
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/************************************************************************/
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/* Internal Class Implementation */
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/************************************************************************/
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bool _isIgnoreUnsupportedLogAttributes(TVG_UNUSED const char* tagAttribute, TVG_UNUSED const char* tagValue)
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{
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#ifdef THORVG_LOG_ENABLED
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const auto attributesNum = 6;
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const struct
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{
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const char* tag;
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bool tagWildcard; //If true, it is assumed that a wildcard is used after the tag. (ex: tagName*)
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const char* value;
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} attributes[] = {
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{"id", false, nullptr},
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{"data-name", false, nullptr},
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{"overflow", false, "visible"},
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{"version", false, nullptr},
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{"xmlns", true, nullptr},
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{"xml:space", false, nullptr},
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};
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for (unsigned int i = 0; i < attributesNum; ++i) {
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if (!strncmp(tagAttribute, attributes[i].tag, attributes[i].tagWildcard ? strlen(attributes[i].tag) : strlen(tagAttribute))) {
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if (attributes[i].value && tagValue) {
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if (!strncmp(tagValue, attributes[i].value, strlen(tagValue))) {
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return true;
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} else continue;
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}
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return true;
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}
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}
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return false;
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#endif
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return true;
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}
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static const char* _simpleXmlFindWhiteSpace(const char* itr, const char* itrEnd)
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{
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for (; itr < itrEnd; itr++) {
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if (isspace((unsigned char)*itr)) break;
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}
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return itr;
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}
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static const char* _simpleXmlSkipWhiteSpace(const char* itr, const char* itrEnd)
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{
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for (; itr < itrEnd; itr++) {
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if (!isspace((unsigned char)*itr)) break;
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}
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return itr;
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}
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static const char* _simpleXmlUnskipWhiteSpace(const char* itr, const char* itrStart)
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{
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for (itr--; itr > itrStart; itr--) {
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if (!isspace((unsigned char)*itr)) break;
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}
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return itr + 1;
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}
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static const char* _simpleXmlSkipXmlEntities(const char* itr, const char* itrEnd)
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{
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auto p = itr;
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while (itr < itrEnd && *itr == '&') {
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for (int i = 0; i < NUMBER_OF_XML_ENTITIES; ++i) {
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if (strncmp(itr, xmlEntity[i], xmlEntityLength[i]) == 0) {
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itr += xmlEntityLength[i];
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break;
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}
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}
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if (itr == p) break;
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p = itr;
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}
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return itr;
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}
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static const char* _simpleXmlUnskipXmlEntities(const char* itr, const char* itrStart)
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{
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auto p = itr;
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while (itr > itrStart && *(itr - 1) == ';') {
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for (int i = 0; i < NUMBER_OF_XML_ENTITIES; ++i) {
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if (itr - xmlEntityLength[i] > itrStart &&
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strncmp(itr - xmlEntityLength[i], xmlEntity[i], xmlEntityLength[i]) == 0) {
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itr -= xmlEntityLength[i];
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break;
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}
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}
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if (itr == p) break;
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p = itr;
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}
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return itr;
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}
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static const char* _skipWhiteSpacesAndXmlEntities(const char* itr, const char* itrEnd)
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{
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itr = _simpleXmlSkipWhiteSpace(itr, itrEnd);
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auto p = itr;
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while (true) {
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if (p != (itr = _simpleXmlSkipXmlEntities(itr, itrEnd))) p = itr;
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else break;
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if (p != (itr = _simpleXmlSkipWhiteSpace(itr, itrEnd))) p = itr;
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else break;
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}
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return itr;
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}
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static const char* _unskipWhiteSpacesAndXmlEntities(const char* itr, const char* itrStart)
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{
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itr = _simpleXmlUnskipWhiteSpace(itr, itrStart);
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auto p = itr;
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while (true) {
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if (p != (itr = _simpleXmlUnskipXmlEntities(itr, itrStart))) p = itr;
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else break;
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if (p != (itr = _simpleXmlUnskipWhiteSpace(itr, itrStart))) p = itr;
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else break;
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}
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return itr;
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}
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static const char* _simpleXmlFindStartTag(const char* itr, const char* itrEnd)
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{
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return (const char*)memchr(itr, '<', itrEnd - itr);
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}
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static const char* _simpleXmlFindEndTag(const char* itr, const char* itrEnd)
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{
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bool insideQuote = false;
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for (; itr < itrEnd; itr++) {
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if (*itr == '"') insideQuote = !insideQuote;
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if (!insideQuote) {
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if ((*itr == '>') || (*itr == '<'))
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return itr;
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}
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}
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return nullptr;
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}
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static const char* _simpleXmlFindEndCommentTag(const char* itr, const char* itrEnd)
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{
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for (; itr < itrEnd; itr++) {
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if ((*itr == '-') && ((itr + 1 < itrEnd) && (*(itr + 1) == '-')) && ((itr + 2 < itrEnd) && (*(itr + 2) == '>'))) return itr + 2;
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}
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return nullptr;
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}
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static const char* _simpleXmlFindEndCdataTag(const char* itr, const char* itrEnd)
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{
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for (; itr < itrEnd; itr++) {
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if ((*itr == ']') && ((itr + 1 < itrEnd) && (*(itr + 1) == ']')) && ((itr + 2 < itrEnd) && (*(itr + 2) == '>'))) return itr + 2;
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}
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return nullptr;
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}
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static const char* _simpleXmlFindDoctypeChildEndTag(const char* itr, const char* itrEnd)
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{
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for (; itr < itrEnd; itr++) {
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if (*itr == '>') return itr;
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}
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return nullptr;
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}
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static SimpleXMLType _getXMLType(const char* itr, const char* itrEnd, size_t &toff)
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{
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toff = 0;
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if (itr[1] == '/') {
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toff = 1;
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return SimpleXMLType::Close;
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} else if (itr[1] == '?') {
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toff = 1;
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return SimpleXMLType::Processing;
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} else if (itr[1] == '!') {
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if ((itr + sizeof("<!DOCTYPE>") - 1 < itrEnd) && (!memcmp(itr + 2, "DOCTYPE", sizeof("DOCTYPE") - 1)) && ((itr[2 + sizeof("DOCTYPE") - 1] == '>') || (isspace((unsigned char)itr[2 + sizeof("DOCTYPE") - 1])))) {
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toff = sizeof("!DOCTYPE") - 1;
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return SimpleXMLType::Doctype;
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} else if (itr + sizeof("<!>") - 1 < itrEnd) {
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toff = sizeof("!") - 1;
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return SimpleXMLType::DoctypeChild;
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} else if ((itr + sizeof("<![CDATA[]]>") - 1 < itrEnd) && (!memcmp(itr + 2, "[CDATA[", sizeof("[CDATA[") - 1))) {
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toff = sizeof("![CDATA[") - 1;
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return SimpleXMLType::CData;
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} else if ((itr + sizeof("<!---->") - 1 < itrEnd) && (!memcmp(itr + 2, "--", sizeof("--") - 1))) {
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toff = sizeof("!--") - 1;
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return SimpleXMLType::Comment;
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}
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return SimpleXMLType::Open;
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}
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return SimpleXMLType::Open;
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}
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/************************************************************************/
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/* External Class Implementation */
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/************************************************************************/
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const char* simpleXmlNodeTypeToString(TVG_UNUSED SvgNodeType type)
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{
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#ifdef THORVG_LOG_ENABLED
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static const char* TYPE_NAMES[] = {
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"Svg",
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"G",
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"Defs",
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"Animation",
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"Arc",
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"Circle",
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"Ellipse",
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"Image",
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"Line",
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"Path",
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"Polygon",
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"Polyline",
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"Rect",
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"Text",
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"TextArea",
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"Tspan",
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"Use",
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"Video",
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"ClipPath",
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"Mask",
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"Unknown",
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};
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return TYPE_NAMES[(int) type];
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#endif
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return nullptr;
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}
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bool isIgnoreUnsupportedLogElements(TVG_UNUSED const char* tagName)
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{
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#ifdef THORVG_LOG_ENABLED
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const auto elementsNum = 1;
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const char* const elements[] = { "title" };
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for (unsigned int i = 0; i < elementsNum; ++i) {
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if (!strncmp(tagName, elements[i], strlen(tagName))) {
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return true;
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}
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}
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return false;
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#else
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return true;
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#endif
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}
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bool simpleXmlParseAttributes(const char* buf, unsigned bufLength, simpleXMLAttributeCb func, const void* data)
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{
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const char *itr = buf, *itrEnd = buf + bufLength;
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char* tmpBuf = (char*)alloca(bufLength + 1);
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if (!buf || !func) return false;
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while (itr < itrEnd) {
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const char* p = _skipWhiteSpacesAndXmlEntities(itr, itrEnd);
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const char *key, *keyEnd, *value, *valueEnd;
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char* tval;
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if (p == itrEnd) return true;
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key = p;
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for (keyEnd = key; keyEnd < itrEnd; keyEnd++) {
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if ((*keyEnd == '=') || (isspace((unsigned char)*keyEnd))) break;
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}
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if (keyEnd == itrEnd) return false;
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if (keyEnd == key) continue;
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if (*keyEnd == '=') value = keyEnd + 1;
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else {
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value = (const char*)memchr(keyEnd, '=', itrEnd - keyEnd);
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if (!value) return false;
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value++;
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}
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keyEnd = _simpleXmlUnskipXmlEntities(keyEnd, key);
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value = _skipWhiteSpacesAndXmlEntities(value, itrEnd);
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if (value == itrEnd) return false;
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if ((*value == '"') || (*value == '\'')) {
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valueEnd = (const char*)memchr(value + 1, *value, itrEnd - value);
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if (!valueEnd) return false;
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value++;
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} else {
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valueEnd = _simpleXmlFindWhiteSpace(value, itrEnd);
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}
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itr = valueEnd + 1;
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value = _skipWhiteSpacesAndXmlEntities(value, itrEnd);
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valueEnd = _unskipWhiteSpacesAndXmlEntities(valueEnd, value);
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memcpy(tmpBuf, key, keyEnd - key);
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tmpBuf[keyEnd - key] = '\0';
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tval = tmpBuf + (keyEnd - key) + 1;
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int i = 0;
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while (value < valueEnd) {
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value = _simpleXmlSkipXmlEntities(value, valueEnd);
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tval[i++] = *value;
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value++;
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}
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tval[i] = '\0';
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if (!func((void*)data, tmpBuf, tval)) {
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if (!_isIgnoreUnsupportedLogAttributes(tmpBuf, tval)) {
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TVGLOG("SVG", "Unsupported attributes used [Elements type: %s][Id : %s][Attribute: %s][Value: %s]", simpleXmlNodeTypeToString(((SvgLoaderData*)data)->svgParse->node->type), ((SvgLoaderData*)data)->svgParse->node->id ? ((SvgLoaderData*)data)->svgParse->node->id->c_str() : "NO_ID", tmpBuf, tval ? tval : "NONE");
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}
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}
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}
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return true;
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}
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bool simpleXmlParse(const char* buf, unsigned bufLength, bool strip, simpleXMLCb func, const void* data)
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{
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const char *itr = buf, *itrEnd = buf + bufLength;
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if (!buf || !func) return false;
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while (itr < itrEnd) {
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if (itr[0] == '<') {
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//Invalid case
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if (itr + 1 >= itrEnd) return false;
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size_t toff = 0;
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SimpleXMLType type = _getXMLType(itr, itrEnd, toff);
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const char* p;
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|
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if (type == SimpleXMLType::CData) p = _simpleXmlFindEndCdataTag(itr + 1 + toff, itrEnd);
|
||
|
|
else if (type == SimpleXMLType::DoctypeChild) p = _simpleXmlFindDoctypeChildEndTag(itr + 1 + toff, itrEnd);
|
||
|
|
else if (type == SimpleXMLType::Comment) p = _simpleXmlFindEndCommentTag(itr + 1 + toff, itrEnd);
|
||
|
|
else p = _simpleXmlFindEndTag(itr + 1 + toff, itrEnd);
|
||
|
|
|
||
|
|
if (p) {
|
||
|
|
//Invalid case: '<' nested
|
||
|
|
if (*p == '<') return false;
|
||
|
|
const char *start, *end;
|
||
|
|
|
||
|
|
start = itr + 1 + toff;
|
||
|
|
end = p;
|
||
|
|
|
||
|
|
switch (type) {
|
||
|
|
case SimpleXMLType::Open: {
|
||
|
|
if (p[-1] == '/') {
|
||
|
|
type = SimpleXMLType::OpenEmpty;
|
||
|
|
end--;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case SimpleXMLType::CData: {
|
||
|
|
if (!memcmp(p - 2, "]]", 2)) end -= 2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case SimpleXMLType::Processing: {
|
||
|
|
if (p[-1] == '?') end--;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case SimpleXMLType::Comment: {
|
||
|
|
if (!memcmp(p - 2, "--", 2)) end -= 2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
default: {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (strip && (type != SimpleXMLType::CData)) {
|
||
|
|
start = _skipWhiteSpacesAndXmlEntities(start, end);
|
||
|
|
end = _unskipWhiteSpacesAndXmlEntities(end, start);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!func((void*)data, type, start, (unsigned int)(end - start))) return false;
|
||
|
|
|
||
|
|
itr = p + 1;
|
||
|
|
} else {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
const char *p, *end;
|
||
|
|
|
||
|
|
if (strip) {
|
||
|
|
p = itr;
|
||
|
|
p = _skipWhiteSpacesAndXmlEntities(p, itrEnd);
|
||
|
|
if (p) {
|
||
|
|
if (!func((void*)data, SimpleXMLType::Ignored, itr, (unsigned int)(p - itr))) return false;
|
||
|
|
itr = p;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
p = _simpleXmlFindStartTag(itr, itrEnd);
|
||
|
|
if (!p) p = itrEnd;
|
||
|
|
|
||
|
|
end = p;
|
||
|
|
if (strip) end = _unskipWhiteSpacesAndXmlEntities(end, itr);
|
||
|
|
|
||
|
|
if (itr != end && !func((void*)data, SimpleXMLType::Data, itr, (unsigned int)(end - itr))) return false;
|
||
|
|
|
||
|
|
if (strip && (end < p) && !func((void*)data, SimpleXMLType::Ignored, end, (unsigned int)(p - end))) return false;
|
||
|
|
|
||
|
|
itr = p;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
bool simpleXmlParseW3CAttribute(const char* buf, simpleXMLAttributeCb func, const void* data)
|
||
|
|
{
|
||
|
|
const char* end;
|
||
|
|
char* key;
|
||
|
|
char* val;
|
||
|
|
char* next;
|
||
|
|
|
||
|
|
if (!buf) return false;
|
||
|
|
|
||
|
|
end = buf + strlen(buf);
|
||
|
|
key = (char*)alloca(end - buf + 1);
|
||
|
|
val = (char*)alloca(end - buf + 1);
|
||
|
|
|
||
|
|
if (buf == end) return true;
|
||
|
|
|
||
|
|
do {
|
||
|
|
char* sep = (char*)strchr(buf, ':');
|
||
|
|
next = (char*)strchr(buf, ';');
|
||
|
|
|
||
|
|
key[0] = '\0';
|
||
|
|
val[0] = '\0';
|
||
|
|
|
||
|
|
if (next == nullptr && sep != nullptr) {
|
||
|
|
memcpy(key, buf, sep - buf);
|
||
|
|
key[sep - buf] = '\0';
|
||
|
|
|
||
|
|
memcpy(val, sep + 1, end - sep - 1);
|
||
|
|
val[end - sep - 1] = '\0';
|
||
|
|
} else if (sep < next && sep != nullptr) {
|
||
|
|
memcpy(key, buf, sep - buf);
|
||
|
|
key[sep - buf] = '\0';
|
||
|
|
|
||
|
|
memcpy(val, sep + 1, next - sep - 1);
|
||
|
|
val[next - sep - 1] = '\0';
|
||
|
|
} else if (next) {
|
||
|
|
memcpy(key, buf, next - buf);
|
||
|
|
key[next - buf] = '\0';
|
||
|
|
}
|
||
|
|
|
||
|
|
if (key[0]) {
|
||
|
|
key = const_cast<char*>(_simpleXmlSkipWhiteSpace(key, key + strlen(key)));
|
||
|
|
key[_simpleXmlUnskipWhiteSpace(key + strlen(key) , key) - key] = '\0';
|
||
|
|
val = const_cast<char*>(_simpleXmlSkipWhiteSpace(val, val + strlen(val)));
|
||
|
|
val[_simpleXmlUnskipWhiteSpace(val + strlen(val) , val) - val] = '\0';
|
||
|
|
|
||
|
|
if (!func((void*)data, key, val)) {
|
||
|
|
if (!_isIgnoreUnsupportedLogAttributes(key, val)) {
|
||
|
|
TVGLOG("SVG", "Unsupported attributes used [Elements type: %s][Id : %s][Attribute: %s][Value: %s]", simpleXmlNodeTypeToString(((SvgLoaderData*)data)->svgParse->node->type), ((SvgLoaderData*)data)->svgParse->node->id ? ((SvgLoaderData*)data)->svgParse->node->id->c_str() : "NO_ID", key, val ? val : "NONE");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
buf = next + 1;
|
||
|
|
} while (next != nullptr);
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
const char* simpleXmlFindAttributesTag(const char* buf, unsigned bufLength)
|
||
|
|
{
|
||
|
|
const char *itr = buf, *itrEnd = buf + bufLength;
|
||
|
|
|
||
|
|
for (; itr < itrEnd; itr++) {
|
||
|
|
if (!isspace((unsigned char)*itr)) {
|
||
|
|
//User skip tagname and already gave it the attributes.
|
||
|
|
if (*itr == '=') return buf;
|
||
|
|
} else {
|
||
|
|
itr = _simpleXmlUnskipXmlEntities(itr, buf);
|
||
|
|
if (itr == itrEnd) return nullptr;
|
||
|
|
return itr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return nullptr;
|
||
|
|
}
|