C++11 regular expressions

src/CMakeLists.txt

@@ -1,6 +1,16 @@
 # Define the source files
 set(SOURCE_FILES "benchmark.cc" "colorprint.cc" "commandlineflags.cc" "sleep.cc" "sysinfo.cc" "walltime.cc")
-set(RE_FILES "re.cc")
+
+# Determine the correct regular expression engine to use
+if(HAVE_STD_REGEX)
+  set(RE_FILES "re_std.cc")
+elseif(HAVE_GNU_POSIX_REGEX)
+  set(RE_FILES "re_posix.cc")
+elseif(HAVE_POSIX_REGEX)
+  set(RE_FILES "re_posix.cc")
+else()
+  message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
+endif()
 
 # Build a regular expression library
 add_library(benchmark_re ${RE_FILES})

src/re.h

@@ -15,10 +15,14 @@
 #ifndef BENCHMARK_RE_H_
 #define BENCHMARK_RE_H_
 
-#if defined OS_FREEBSD
+#if defined(HAVE_STD_REGEX)
+#include <regex>
+#elif defined(HAVE_GNU_POSIX_REGEX)
 #include <gnuregex.h>
-#else
+#elif defined(HAVE_POSIX_REGEX)
 #include <regex.h>
+#else
+#error No regular expression backend was found!
 #endif
 #include <string>
 
@@ -42,7 +46,13 @@ class Regex {
  private:
   bool init_;
   // Underlying regular expression object
+#if defined(HAVE_STD_REGEX)
+  std::regex re_;
+#elif defined(HAVE_POSIX_REGEX) || defined(HAVE_GNU_POSIX_REGEX)
   regex_t re_;
+#else
+# error No regular expression backend implementation available
+#endif
 };
 
 }  // end namespace benchmark

src/re_std.cc

@@ -0,0 +1,45 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <benchmark/macros.h>
+#include "re.h"
+
+namespace benchmark {
+
+Regex::Regex() : init_(false) { }
+
+bool Regex::Init(const std::string& spec, std::string* error) {
+  try {
+    re_ = std::regex(spec, std::regex_constants::extended);
+
+    init_ = true;
+  } catch (const std::regex_error& e) {
+    if (error) {
+      *error = e.what();
+    }
+  }
+  return init_;
+}
+
+Regex::~Regex() { }
+
+bool Regex::Match(const std::string& str) {
+  if (!init_) {
+    return false;
+  }
+
+  return std::regex_search(str, re_);
+}
+
+}  // end namespace benchmark