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/*
* Copyright (C) 2001-2019 Jacek Sieka, arnetheduck on gmail point com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "stdinc.h"
#include "SimpleXML.h"
#include "Streams.h"
namespace dcpp {
const string SimpleXML::utf8Header = "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>\r\n";
string& SimpleXML::escape(string& aString, bool aAttrib, bool aLoading /* = false */, const string &encoding /* = "UTF-8" */) {
string::size_type i = 0;
const char* chars = aAttrib ? "<&>'\"" : "<&>";
if(aLoading) {
while((i = aString.find('&', i)) != string::npos) {
if(aString.compare(i+1, 3, "lt;") == 0) {
aString.replace(i, 4, 1, '<');
} else if(aString.compare(i+1, 4, "amp;") == 0) {
aString.replace(i, 5, 1, '&');
} else if(aString.compare(i+1, 3, "gt;") == 0) {
aString.replace(i, 4, 1, '>');
} else if(aAttrib) {
if(aString.compare(i+1, 5, "apos;") == 0) {
aString.replace(i, 6, 1, '\'');
} else if(aString.compare(i+1, 5, "quot;") == 0) {
aString.replace(i, 6, 1, '"');
}
}
i++;
}
i = 0;
if( (i = aString.find('\n')) != string::npos) {
if(i > 0 && aString[i-1] != '\r') {
// This is a unix \n thing...convert it...
i = 0;
while( (i = aString.find('\n', i) ) != string::npos) {
if(aString[i-1] != '\r')
aString.insert(i, 1, '\r');
i+=2;
}
}
}
aString = Text::toUtf8(aString, encoding);
} else {
while( (i = aString.find_first_of(chars, i)) != string::npos) {
switch(aString[i]) {
case '<': aString.replace(i, 1, "<"); i+=4; break;
case '&': aString.replace(i, 1, "&"); i+=5; break;
case '>': aString.replace(i, 1, ">"); i+=4; break;
case '\'': aString.replace(i, 1, "'"); i+=6; break;
case '"': aString.replace(i, 1, """); i+=6; break;
default: dcassert(0);
}
}
// No need to convert back to acp since our utf8Header denotes we
// should store it as utf8.
}
return aString;
}
void SimpleXML::Tag::appendAttribString(string& tmp) {
for(auto& i: attribs) {
tmp.append(i.first);
tmp.append("=\"", 2);
if(needsEscape(i.second, true)) {
string tmp2(i.second);
escape(tmp2, true);
tmp.append(tmp2);
} else {
tmp.append(i.second);
}
tmp.append("\" ", 2);
}
tmp.erase(tmp.size()-1);
}
/**
* The same as the version above, but writes to a file instead...yes, this could be made
* with streams and only one code set but streams are slow...the file f should be a buffered
* file, otherwise things will be very slow (I assume write is not expensive and call it a lot
*/
void SimpleXML::Tag::toXML(int indent, OutputStream* f) {
if(children.empty() && data.empty()) {
string tmp;
tmp.reserve(indent + name.length() + 30);
tmp.append(indent, '\t');
tmp.append(1, '<');
tmp.append(name);
tmp.append(1, ' ');
appendAttribString(tmp);
tmp.append("/>\r\n", 4);
f->write(tmp);
} else {
string tmp;
tmp.append(indent, '\t');
tmp.append(1, '<');
tmp.append(name);
tmp.append(1, ' ');
appendAttribString(tmp);
if(children.empty()) {
tmp.append(1, '>');
if(needsEscape(data, false)) {
string tmp2(data);
escape(tmp2, false);
tmp.append(tmp2);
} else {
tmp.append(data);
}
} else {
tmp.append(">\r\n", 3);
f->write(tmp);
tmp.clear();
for(auto& i: children) {
i->toXML(indent + 1, f);
}
tmp.append(indent, '\t');
}
tmp.append("</", 2);
tmp.append(name);
tmp.append(">\r\n", 3);
f->write(tmp);
}
}
bool SimpleXML::findChild(const string& aName) noexcept {
dcassert(current != NULL);
if(found && currentChild != current->children.end())
++currentChild;
while(currentChild!=current->children.end()) {
if((*currentChild)->name == aName) {
found = true;
return true;
} else
++currentChild;
}
return false;
}
void SimpleXML::addTag(const string& aName, const string& aData /* = "" */) {
if(aName.empty()) {
throw SimpleXMLException("Empty tag names not allowed");
}
if(current == &root && !current->children.empty()) {
throw SimpleXMLException("Only one root tag allowed");
} else {
current->children.push_back(new Tag(aName, aData, current));
currentChild = current->children.end() - 1;
}
}
void SimpleXML::addAttrib(const string& aName, const string& aData) {
if(current == &root)
throw SimpleXMLException("No tag is currently selected");
current->attribs.emplace_back(aName, aData);
}
void SimpleXML::addChildAttrib(const string& aName, const string& aData) {
checkChildSelected();
(*currentChild)->attribs.emplace_back(aName, aData);
}
void SimpleXML::fromXML(const string& aXML) {
if(!root.children.empty()) {
delete root.children[0];
root.children.clear();
}
TagReader t(&root);
SimpleXMLReader(&t).parse(aXML);
if(root.children.size() != 1) {
throw SimpleXMLException("Invalid XML file, missing or multiple root tags");
}
current = &root;
resetCurrentChild();
}
string SimpleXML::toXML() {
StringOutputStream os;
toXML(&os);
return os.getString();
}
} // namespace dcpp
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