2 files changed, 72 insertions, 0 deletions
diff --git a/src/support/colors.cpp b/src/support/colors.cpp
new file mode 100644
index 000000000..aca720514
--- /dev/null
+++ b/src/support/colors.cpp
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 WebAssembly Community Group participants
+ *
+ * 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 "support/colors.h"
+
+#include <cstdlib>
+#include <ostream>
+
+#if defined(__linux__) || defined(__apple__)
+# define CAN_HAZ_COLOR 1
+# include <unistd.h>
+#endif
+
+namespace Colors {
+void outputColorCode(std::ostream& stream, const char* colorCode) {
+#if defined(CAN_HAZ_COLOR)
+  const static bool has_color = []() {
+    return (getenv("COLORS") && getenv("COLORS")[0] == '1') ||  // forced
+           (isatty(STDOUT_FILENO) &&
+            (!getenv("COLORS") || getenv("COLORS")[0] != '0'));  // implicit
+  }();
+  if (has_color) stream << colorCode;
+#endif
+}
+}  // namespace Colors
diff --git a/src/support/colors.h b/src/support/colors.h
new file mode 100644
index 000000000..bdef31ec3
--- /dev/null
+++ b/src/support/colors.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 WebAssembly Community Group participants
+ *
+ * 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.
+ */
+
+#ifndef wasm_color_h
+#define wasm_color_h
+
+#include <iosfwd>
+
+namespace Colors {
+void outputColorCode(std::ostream&stream, const char *colorCode);
+inline void normal(std::ostream& stream) { outputColorCode(stream,"\033[0m"); }
+inline void red(std::ostream& stream) { outputColorCode(stream,"\033[31m"); }
+inline void magenta(std::ostream& stream) { outputColorCode(stream,"\033[35m"); }
+inline void orange(std::ostream& stream) { outputColorCode(stream,"\033[33m"); }
+inline void grey(std::ostream& stream) { outputColorCode(stream,"\033[37m"); }
+inline void green(std::ostream& stream) { outputColorCode(stream,"\033[32m"); }
+inline void blue(std::ostream& stream) { outputColorCode(stream,"\033[34m"); }
+inline void bold(std::ostream& stream) { outputColorCode(stream,"\033[1m"); }
+};
+
+#endif // wasm_color_h