Add command line option --benchmark_counters_tabular

include/benchmark/reporter.h

@@ -157,10 +157,17 @@ class BenchmarkReporter {
 // Simple reporter that outputs benchmark data to the console. This is the
 // default reporter used by RunSpecifiedBenchmarks().
 class ConsoleReporter : public BenchmarkReporter {
- public:
-  enum OutputOptions { OO_None, OO_Color };
-  explicit ConsoleReporter(OutputOptions color_output = OO_Color)
-      : name_field_width_(0), color_output_(color_output == OO_Color) {}
+public:
+  enum OutputOptions {
+    OO_None = 0,
+    OO_Color = 1,
+    OO_Tabular = 2,
+    OO_ColorTabular = OO_Color|OO_Tabular,
+    OO_Defaults = OO_ColorTabular
+  };
+  explicit ConsoleReporter(OutputOptions opts_ = OO_Defaults)
+      : output_options_(opts_), name_field_width_(0),
+        prev_counters_(), printed_header_(false) {}
 
   virtual bool ReportContext(const Context& context);
   virtual void ReportRuns(const std::vector<Run>& reports);
@@ -169,11 +176,10 @@ class ConsoleReporter : public BenchmarkReporter {
   virtual void PrintRunData(const Run& report);
   virtual void PrintHeader(const Run& report);
 
+  OutputOptions output_options_;
   size_t name_field_width_;
+  UserCounters prev_counters_;
   bool printed_header_;
-
- private:
-  bool color_output_;
 };
 
 class JSONReporter : public BenchmarkReporter {

src/benchmark.cc

@@ -91,6 +91,11 @@ DEFINE_string(benchmark_color, "auto",
               "environment variable is set to a terminal type that supports "
               "colors.");
 
+DEFINE_bool(benchmark_counters_tabular, false,
+            "Whether to use tabular format when printing user counters to "
+            "the console.  Valid values: 'true'/'yes'/1, 'false'/'no'/0."
+            "Defaults to false.");
+
 DEFINE_int32(v, 0, "The level of verbose logging to output");
 
 namespace benchmark {
@@ -510,10 +515,10 @@ void RunBenchmarks(const std::vector<Benchmark::Instance>& benchmarks,
 }
 
 std::unique_ptr<BenchmarkReporter> CreateReporter(
-    std::string const& name, ConsoleReporter::OutputOptions allow_color) {
+    std::string const& name, ConsoleReporter::OutputOptions output_opts) {
   typedef std::unique_ptr<BenchmarkReporter> PtrType;
   if (name == "console") {
-    return PtrType(new ConsoleReporter(allow_color));
+    return PtrType(new ConsoleReporter(output_opts));
   } else if (name == "json") {
     return PtrType(new JSONReporter);
   } else if (name == "csv") {
@@ -546,16 +551,20 @@ size_t RunSpecifiedBenchmarks(BenchmarkReporter* console_reporter,
   std::unique_ptr<BenchmarkReporter> default_console_reporter;
   std::unique_ptr<BenchmarkReporter> default_file_reporter;
   if (!console_reporter) {
-    auto output_opts = ConsoleReporter::OO_None;
-    if (FLAGS_benchmark_color == "auto")
-      output_opts = IsColorTerminal() ? ConsoleReporter::OO_Color
-                                      : ConsoleReporter::OO_None;
-    else
-      output_opts = IsTruthyFlagValue(FLAGS_benchmark_color)
-                        ? ConsoleReporter::OO_Color
-                        : ConsoleReporter::OO_None;
-    default_console_reporter =
-        internal::CreateReporter(FLAGS_benchmark_format, output_opts);
+    int output_opts = ConsoleReporter::OO_Defaults;
+    if ((FLAGS_benchmark_color == "auto" && IsColorTerminal()) ||
+        IsTruthyFlagValue(FLAGS_benchmark_color)) {
+      output_opts |= ConsoleReporter::OO_Color;
+    } else {
+      output_opts &= ~ConsoleReporter::OO_Color;
+    }
+    if(FLAGS_benchmark_counters_tabular) {
+      output_opts |= ConsoleReporter::OO_Tabular;
+    } else {
+      output_opts &= ~ConsoleReporter::OO_Tabular;
+    }
+    default_console_reporter = internal::CreateReporter(
+          FLAGS_benchmark_format, (ConsoleReporter::OutputOptions)output_opts);
     console_reporter = default_console_reporter.get();
   }
   auto& Out = console_reporter->GetOutputStream();
@@ -614,6 +623,7 @@ void PrintUsageAndExit() {
           "          [--benchmark_out=<filename>]\n"
           "          [--benchmark_out_format=<json|console|csv>]\n"
           "          [--benchmark_color={auto|true|false}]\n"
+          "          [--benchmark_counters_tabular={true|false}]\n"
           "          [--v=<verbosity>]\n");
   exit(0);
 }
@@ -638,6 +648,8 @@ void ParseCommandLineFlags(int* argc, char** argv) {
         // "color_print" is the deprecated name for "benchmark_color".
         // TODO: Remove this.
         ParseStringFlag(argv[i], "color_print", &FLAGS_benchmark_color) ||
+        ParseBoolFlag(argv[i], "benchmark_counters_tabular",
+                        &FLAGS_benchmark_counters_tabular) ||
         ParseInt32Flag(argv[i], "v", &FLAGS_v)) {
       for (int j = i; j != *argc - 1; ++j) argv[j] = argv[j + 1];
 

src/console_reporter.cc

@@ -36,6 +36,7 @@ namespace benchmark {
 bool ConsoleReporter::ReportContext(const Context& context) {
   name_field_width_ = context.name_field_width;
   printed_header_ = false;
+  prev_counters_.clear();
 
   PrintBasicContext(&GetErrorStream(), context);
 
@@ -64,13 +65,21 @@ void ConsoleReporter::PrintHeader(const Run& run) {
 
 void ConsoleReporter::ReportRuns(const std::vector<Run>& reports) {
   for (const auto& run : reports) {
-    // print the header if none was printed yet
-    if (!printed_header_) {
+    // print the header:
+    // --- if none was printed yet
+    bool print_header = !printed_header_;
+    // --- or if the format is tabular and this run
+    //     has different fields from the prev header
+    print_header |= (output_options_ & OO_Tabular) &&
+                    (!internal::SameNames(run.counters, prev_counters_));
+    if (print_header) {
       printed_header_ = true;
+      prev_counters_ = run.counters;
       PrintHeader(run);
     }
     // As an alternative to printing the headers like this, we could sort
-    // the benchmarks by header and then print like that.
+    // the benchmarks by header and then print. But this would require
+    // waiting for the full results before printing, or printing twice.
     PrintRunData(run);
   }
 }
@@ -86,8 +95,8 @@ static void IgnoreColorPrint(std::ostream& out, LogColor, const char* fmt,
 void ConsoleReporter::PrintRunData(const Run& result) {
   typedef void(PrinterFn)(std::ostream&, LogColor, const char*, ...);
   auto& Out = GetOutputStream();
-  PrinterFn* printer =
-      color_output_ ? (PrinterFn*)ColorPrintf : IgnoreColorPrint;
+  PrinterFn* printer = (output_options_ & OO_Color) ?
+                         (PrinterFn*)ColorPrintf : IgnoreColorPrint;
   auto name_color =
       (result.report_big_o || result.report_rms) ? COLOR_BLUE : COLOR_GREEN;
   printer(Out, name_color, "%-*s ", name_field_width_,
@@ -134,7 +143,11 @@ void ConsoleReporter::PrintRunData(const Run& result) {
 
   for (auto& c : result.counters) {
     auto const& s = HumanReadableNumber(c.second.value);
-    printer(Out, COLOR_DEFAULT, " %s=%s", c.first.c_str(), s.c_str());
+    if(output_options_ & OO_Tabular) {
+      printer(Out, COLOR_DEFAULT, " %10s", s.c_str());
+    } else {
+      printer(Out, COLOR_DEFAULT, " %s=%s", c.first.c_str(), s.c_str());
+    }
   }
 
   if (!rate.empty()) {

src/counter.cc

@@ -57,7 +57,7 @@ bool SameNames(UserCounters const& l, UserCounters const& r) {
     return false;
   }
   for (auto const& c : l) {
-    if ( r.find(c.first) == r.end()) {
+    if (r.find(c.first) == r.end()) {
       return false;
     }
   }