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[*_restore] Use a little wrapper class for the expat XML_Parser to ensure it gets destroyed.

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This commit is contained in:
Joe Thornber
2014-08-26 11:23:29 +01:00
parent a7c96c0e1e
commit d17ad86a88
4 changed files with 42 additions and 28 deletions
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15
caching/xml_format.cc
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@@ -5,7 +5,6 @@
#include "base/xml_utils.h"
#include <boost/lexical_cast.hpp>
#include <expat.h>
using namespace caching;
using namespace persistent_data;
@@ -239,12 +238,10 @@ caching::create_xml_emitter(ostream &out)
void
caching::parse_xml(istream &in, emitter::ptr e)
{
XML_Parser parser = XML_ParserCreate(NULL);
if (!parser)
throw runtime_error("couldn't create xml parser");
xml_parser p;
XML_SetUserData(parser, e.get());
XML_SetElementHandler(parser, start_tag, end_tag);
XML_SetUserData(p.get_parser(), e.get());
XML_SetElementHandler(p.get_parser(), start_tag, end_tag);
while (!in.eof()) {
char buffer[4096];
@@ -252,12 +249,12 @@ caching::parse_xml(istream &in, emitter::ptr e)
size_t len = in.gcount();
int done = in.eof();
if (!XML_Parse(parser, buffer, len, done)) {
if (!XML_Parse(p.get_parser(), buffer, len, done)) {
ostringstream out;
out << "Parse error at line "
<< XML_GetCurrentLineNumber(parser)
<< XML_GetCurrentLineNumber(p.get_parser())
<< ":\n"
<< XML_ErrorString(XML_GetErrorCode(parser))
<< XML_ErrorString(XML_GetErrorCode(p.get_parser()))
<< endl;
throw runtime_error(out.str());
}