* Simple class for writing XML files.

This commit is contained in:
Eelco Dolstra 2006-08-03 13:21:21 +00:00
parent fcb784051f
commit 4750f6c5ed

161
src/libutil/xml-writer.cc Normal file
View file

@ -0,0 +1,161 @@
#include <iostream>
#include <string>
#include <list>
#include <map>
#include <assert.h>
using namespace std;
typedef map<string, string> XMLAttrs;
class XMLWriter
{
private:
ostream & output;
bool closed;
list<string> pendingElems;
public:
XMLWriter(ostream & output);
~XMLWriter();
void close();
void openElement(const string & name,
const XMLAttrs & attrs = XMLAttrs());
void closeElement();
void writeShortElement(const string & name,
const XMLAttrs & attrs = XMLAttrs());
void writeCharData(const string & data);
private:
void writeAttrs(const XMLAttrs & attrs);
};
class XMLOpenElement
{
private:
XMLWriter & writer;
public:
XMLOpenElement(XMLWriter & writer, const string & name,
const XMLAttrs & attrs = XMLAttrs())
: writer(writer)
{
writer.openElement(name, attrs);
}
~XMLOpenElement()
{
writer.closeElement();
}
};
XMLWriter::XMLWriter(ostream & output)
: output(output)
{
output << "<?xml version='1.0' encoding='utf-8'?>\n";
closed = false;
}
XMLWriter::~XMLWriter()
{
close();
}
void XMLWriter::close()
{
if (closed) return;
while (!pendingElems.empty()) closeElement();
closed = true;
}
void XMLWriter::openElement(const string & name,
const XMLAttrs & attrs)
{
assert(!closed);
output << "<" << name;
writeAttrs(attrs);
output << ">";
pendingElems.push_back(name);
}
void XMLWriter::closeElement()
{
assert(!pendingElems.empty());
output << "</" << pendingElems.back() << ">";
pendingElems.pop_back();
if (pendingElems.empty()) closed = true;
}
void XMLWriter::writeShortElement(const string & name,
const XMLAttrs & attrs)
{
assert(!closed);
output << "<" << name;
writeAttrs(attrs);
output << " />";
}
void XMLWriter::writeCharData(const string & data)
{
assert(!pendingElems.empty());
for (unsigned int i = 0; i < data.size(); ++i) {
char c = data[i];
if (c == '<') output << "&lt;";
else if (c == '&') output << "&amp;";
else output << c;
}
}
void XMLWriter::writeAttrs(const XMLAttrs & attrs)
{
for (XMLAttrs::const_iterator i = attrs.begin(); i != attrs.end(); ++i) {
output << " " << i->first << "=\"";
for (unsigned int j = 0; j < i->second.size(); ++j) {
char c = i->second[j];
if (c == '"') output << "&quot;";
else if (c == '<') output << "&lt;";
else if (c == '&') output << "&amp;";
else output << c;
}
output << "\"";
}
}
int main(int argc, char * * argv)
{
XMLWriter doc(cout);
// OpenElement e(doc, "foo");
doc.openElement("foo");
doc.writeCharData("dit is een test &\n");
doc.writeCharData("<foo>\n");
for (int i = 0; i < 5; ++i) {
XMLAttrs attrs;
attrs["a"] = "b";
attrs["bla"] = "<foo>'&\">";
XMLOpenElement e(doc, "item", attrs);
doc.writeCharData("x");
}
return 0;
}