Uses SNPRINT macro where possible. Otherwise uses #define for format.

runtime/vm/os_win.cc

 // 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 "vm/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "vm/os.h"
 
 #include <malloc.h>  // NOLINT
 #include <process.h>  // NOLINT
 #include <time.h>  // NOLINT
 
 #include "platform/utils.h"
 #include "platform/assert.h"
 #include "vm/os_thread.h"
 #include "vm/vtune.h"
+#include "vm/zone.h"
 
 namespace dart {
 
 const char* OS::Name() {
   return "windows";
 }
 
 
 intptr_t OS::ProcessId() {
   return static_cast<intptr_t>(GetCurrentProcessId());
@@ skipping 236 matching lines @@
   // truncated or if there was an error.
   // The static cast is safe here as we have already determined that 'written'
   // is >= 0.
   if (static_cast<size_t>(written) >= size) {
     str[size - 1] = '\0';
   }
   return written;
 }
 
 
+char* OS::SCreate(Zone* zone, const char* format, ...) {
+  va_list args;
+  va_start(args, format);
+  char* buffer = VSCreate(zone, format, args);
+  va_end(args);
+  return buffer;
+}
+
+
+char* OS::VSCreate(Zone* zone, const char* format, va_list args) {
+  // Measure.
+  va_list measure_args;
+  va_copy(measure_args, args);
+  intptr_t len = VSNPrint(NULL, 0, format, measure_args);
+  va_end(measure_args);
+
+  char* buffer;
+  if (zone) {
+    buffer = zone->Alloc<char>(len + 1);
+  } else {
+    buffer = reinterpret_cast<char*>(malloc(len + 1));
+  }
+  ASSERT(buffer != NULL);
+
+  // Print.
+  va_list print_args;
+  va_copy(print_args, args);
+  VSNPrint(buffer, len + 1, format, print_args);
+  va_end(print_args);
+  return buffer;
+}
+
+
 bool OS::StringToInt64(const char* str, int64_t* value) {
   ASSERT(str != NULL && strlen(str) > 0 && value != NULL);
   int32_t base = 10;
   char* endptr;
   int i = 0;
   if (str[0] == '-') {
     i = 1;
   }
   if ((str[i] == '0') &&
       (str[i + 1] == 'x' || str[i + 1] == 'X') &&
@@ skipping 44 matching lines @@
 }
 
 
 void OS::Exit(int code) {
   exit(code);
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)