Revised CL for customisable logging (replacing printfs).

runtime/bin/log_macos.cc

Index: runtime/bin/log_macos.cc
===================================================================
--- runtime/bin/log_macos.cc	(revision 0)
+++ runtime/bin/log_macos.cc	(revision 0)
@@ -0,0 +1,29 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include <crt_externs.h>

[Ivan Posva, 2012/11/15 07:43:17]

What is this needed for?

[gram, 2012/11/15 21:16:50]

Done.

+#include <signal.h>

[Ivan Posva, 2012/11/15 07:43:17]

What for?

[gram, 2012/11/15 21:16:50]

Done.

+#include <string.h>
+#include <unistd.h>

[Ivan Posva, 2012/11/15 07:43:17]

As far as I can tell you should only need:
#include <stdio.h>
#include <stdarg.h>

[gram, 2012/11/15 21:16:50]

Done.

+
+#include "bin/log.h"

[Ivan Posva, 2012/11/15 07:43:17]

ditto

[gram, 2012/11/15 21:16:50]

Done.

+
+void Log::Print(const char* format, ...) {
+  va_list args;
+  va_start(args, format);
+  VFPrint(stdout, format, args);
+  va_end(args);
+}
+
+void Log::VFPrint(FILE* stream, const char* format, va_list args) {

[Ivan Posva, 2012/11/15 07:43:17]

ditto

[gram, 2012/11/15 21:16:50]

Done.

+  vfprintf(stream, format, args);
+  fflush(stream);
+}
+
+void Log::PrintErr(const char* format, ...) {
+  va_list args;
+  va_start(args, format);
+  VFPrint(stderr, format, args);
+  va_end(args);
+}