static string showErrorContext(const XmlException &e, const char *query)
{
ostringstream msg;
msg << e.what();
if(e.getQueryLine() != 0 && e.getQueryFile() == 0) {
msg << endl;
int line = 1;
while(line != e.getQueryLine() && *query != 0) {
if(*query == '\n' ||
(*query == '\r' && *(query + 1) != '\n'))
++line;
++query;
}
if(line == e.getQueryLine()) {
while(*query != 0) {
msg << (*query);
if(*query == '\n' ||
(*query == '\r' && *(query + 1) != '\n'))
break;
++query;
}
if(e.getQueryColumn() != 0) {
if(*query == 0) msg << endl;
msg << string(e.getQueryColumn() - 1, ' ') << "^";
}
}
}
return msg.str();
}