#include "xml-writer.hh" #include <assert.h> namespace nix { XMLWriter::XMLWriter(bool indent, std::ostream& output) : output(output), indent(indent) { output << "<?xml version='1.0' encoding='utf-8'?>" << std::endl; closed = false; } XMLWriter::~XMLWriter() { close(); } void XMLWriter::close() { if (closed) { return; } while (!pendingElems.empty()) closeElement(); closed = true; } void XMLWriter::indent_(size_t depth) { if (!indent) { return; } output << string(depth * 2, ' '); } void XMLWriter::openElement(const string& name, const XMLAttrs& attrs) { assert(!closed); indent_(pendingElems.size()); output << "<" << name; writeAttrs(attrs); output << ">"; if (indent) { output << std::endl; } pendingElems.push_back(name); } void XMLWriter::closeElement() { assert(!pendingElems.empty()); indent_(pendingElems.size() - 1); output << "</" << pendingElems.back() << ">"; if (indent) { output << std::endl; } pendingElems.pop_back(); if (pendingElems.empty()) { closed = true; } } void XMLWriter::writeEmptyElement(const string& name, const XMLAttrs& attrs) { assert(!closed); indent_(pendingElems.size()); output << "<" << name; writeAttrs(attrs); output << " />"; if (indent) { output << std::endl; } } void XMLWriter::writeAttrs(const XMLAttrs& attrs) { for (auto& i : attrs) { output << " " << i.first << "=\""; for (size_t j = 0; j < i.second.size(); ++j) { char c = i.second[j]; if (c == '"') output << """; else if (c == '<') output << "<"; else if (c == '>') output << ">"; else if (c == '&') output << "&"; /* Escape newlines to prevent attribute normalisation (see XML spec, section 3.3.3. */ else if (c == '\n') output << "
"; else output << c; } output << "\""; } } } // namespace nix