140 lines
4.7 KiB
C++
140 lines
4.7 KiB
C++
bool Hide_warnings = false;
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struct trace_stream {
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vector<pair<string, string> > past_lines; // [(layer label, line)]
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// accumulator for current line
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ostringstream* curr_stream;
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string curr_layer;
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trace_stream() :curr_stream(NULL) {}
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~trace_stream() { if (curr_stream) delete curr_stream; }
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ostringstream& stream(string layer) {
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newline();
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curr_stream = new ostringstream;
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curr_layer = layer;
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return *curr_stream;
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}
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// be sure to call this before messing with curr_stream or curr_layer
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void newline() {
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if (!curr_stream) return;
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string curr_contents = curr_stream->str();
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curr_contents.erase(curr_contents.find_last_not_of("\r\n")+1);
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past_lines.push_back(pair<string, string>(curr_layer, curr_contents));
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delete curr_stream;
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curr_stream = NULL;
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}
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string readable_contents(string layer) { // missing layer = everything
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newline();
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ostringstream output;
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for (vector<pair<string, string> >::iterator p = past_lines.begin(); p != past_lines.end(); ++p)
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if (layer.empty() || layer == p->first)
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output << p->first << ": " << with_newline(p->second);
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return output.str();
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}
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string with_newline(string s) {
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if (s[s.size()-1] != '\n') return s+'\n';
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return s;
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}
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};
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trace_stream* Trace_stream = NULL;
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// Top-level helper. IMPORTANT: can't nest.
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#define trace(layer) !Trace_stream ? cerr /*print nothing*/ : Trace_stream->stream(layer)
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// Warnings should go straight to cerr by default since calls to trace() have
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// some unfriendly constraints (they delay printing, they can't nest)
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#define raise ((!Trace_stream || !Hide_warnings) ? cerr /*do print*/ : Trace_stream->stream("warn")) << __FILE__ << ":" << __LINE__ << " "
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// raise << die exits after printing -- unless Hide_warnings is set.
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struct die {};
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ostream& operator<<(ostream& os, __attribute__((unused)) die) {
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if (Hide_warnings) return os;
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os << "dying\n";
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exit(1);
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}
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#define CLEAR_TRACE delete Trace_stream, Trace_stream = new trace_stream;
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#define DUMP(layer) cerr << Trace_stream->readable_contents(layer)
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// Trace_stream is a resource, lease_tracer uses RAII to manage it.
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struct lease_tracer {
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lease_tracer() { Trace_stream = new trace_stream; }
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~lease_tracer() { delete Trace_stream, Trace_stream = NULL; }
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};
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#define START_TRACING_UNTIL_END_OF_SCOPE lease_tracer leased_tracer;
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bool check_trace_contents(string FUNCTION, string FILE, int LINE, string layer, string expected) { // empty layer == everything
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vector<string> expected_lines = split(expected, "\n");
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size_t curr_expected_line = 0;
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while (curr_expected_line < expected_lines.size() && expected_lines[curr_expected_line].empty())
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++curr_expected_line;
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if (curr_expected_line == expected_lines.size()) return true;
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Trace_stream->newline();
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ostringstream output;
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for (vector<pair<string, string> >::iterator p = Trace_stream->past_lines.begin(); p != Trace_stream->past_lines.end(); ++p) {
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if (!layer.empty() && layer != p->first)
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continue;
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if (p->second != expected_lines[curr_expected_line])
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continue;
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++curr_expected_line;
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while (curr_expected_line < expected_lines.size() && expected_lines[curr_expected_line].empty())
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++curr_expected_line;
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if (curr_expected_line == expected_lines.size()) return true;
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}
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++Num_failures;
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cerr << "\nF " << FUNCTION << "(" << FILE << ":" << LINE << "): missing [" << expected_lines[curr_expected_line] << "] in trace:\n";
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DUMP(layer);
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Passed = false;
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return false;
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}
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#define CHECK_TRACE_CONTENTS(...) check_trace_contents(__FUNCTION__, __FILE__, __LINE__, __VA_ARGS__)
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int trace_count(string layer, string line) {
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Trace_stream->newline();
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long result = 0;
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for (vector<pair<string, string> >::iterator p = Trace_stream->past_lines.begin(); p != Trace_stream->past_lines.end(); ++p) {
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if (layer == p->first)
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if (line == "" || p->second == line)
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++result;
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}
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return result;
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}
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#define CHECK_TRACE_WARNS() CHECK(trace_count("warn", "") > 0)
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#define CHECK_TRACE_DOESNT_WARN() \
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if (trace_count("warn") > 0) { \
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++Num_failures; \
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cerr << "\nF " << __FUNCTION__ << "(" << __FILE__ << ":" << __LINE__ << "): unexpected warnings\n"; \
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DUMP("warn"); \
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Passed = false; \
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return; \
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}
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bool trace_doesnt_contain(string layer, string line) {
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return trace_count(layer, line) == 0;
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}
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#define CHECK_TRACE_DOESNT_CONTAIN(...) CHECK(trace_doesnt_contain(__VA_ARGS__))
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vector<string> split(string s, string delim) {
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vector<string> result;
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string::size_type begin=0, end=s.find(delim);
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while (true) {
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if (end == string::npos) {
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result.push_back(string(s, begin, string::npos));
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break;
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}
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result.push_back(string(s, begin, end-begin));
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begin = end+delim.size();
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end = s.find(delim, begin);
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}
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return result;
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}
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