daemon: Remove unused XML output code.

* nix/local.mk (libutil_a_SOURCES): Remove libutil/xml-writer.cc.
(libutil_headers): Remove libutil/xml-writer.hh.
* nix/libutil/xml-writer.hh, nix/libutil/xml-writer.cc: Remove.

nix/libutil/xml-writer.cc

@@ -1,94 +0,0 @@
-#include <assert.h>
-
-#include "xml-writer.hh"
-
-
-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_(unsigned int 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 (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 << "&gt;";
-            else if (c == '&') output << "&amp;";
-            /* Escape newlines to prevent attribute normalisation (see
-               XML spec, section 3.3.3. */
-            else if (c == '\n') output << "&#xA;";
-            else output << c;
-        }
-        output << "\"";
-    }
-}
-
-
-}

nix/libutil/xml-writer.hh

@@ -1,69 +0,0 @@
-#pragma once
-
-#include <iostream>
-#include <string>
-#include <list>
-#include <map>
-
-
-namespace nix {
-
-using std::string;
-using std::map;
-using std::list;
-
-
-typedef map<string, string> XMLAttrs;
-
-
-class XMLWriter
-{
-private:
-
-    std::ostream & output;
-
-    bool indent;
-    bool closed;
-
-    list<string> pendingElems;
-
-public:
-
-    XMLWriter(bool indent, std::ostream & output);
-    ~XMLWriter();
-
-    void close();
-
-    void openElement(const string & name,
-        const XMLAttrs & attrs = XMLAttrs());
-    void closeElement();
-
-    void writeEmptyElement(const string & name,
-        const XMLAttrs & attrs = XMLAttrs());
-
-private:
-    void writeAttrs(const XMLAttrs & attrs);
-
-    void indent_(unsigned int depth);
-};
-
-
-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();
-    }
-};
-
-
-}

nix/local.mk

@@ -55,7 +55,6 @@ libutil_a_SOURCES =				\
   %D%/libutil/affinity.cc			\
   %D%/libutil/serialise.cc			\
   %D%/libutil/util.cc				\
-  %D%/libutil/xml-writer.cc			\
   %D%/libutil/hash.cc				\
   %D%/libutil/gcrypt-hash.cc
 
@@ -63,7 +62,6 @@ libutil_headers =				\
   %D%/libutil/affinity.hh			\
   %D%/libutil/hash.hh				\
   %D%/libutil/serialise.hh			\
-  %D%/libutil/xml-writer.hh			\
   %D%/libutil/util.hh				\
   %D%/libutil/archive.hh			\
   %D%/libutil/types.hh				\