Implement caching scheme for Date fields.

src/objects-printer.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 645 matching lines @@
   // This also means that previous results will be overwritten.
   static char* buffer = NULL;
   if (buffer != NULL) free(buffer);
   buffer = new char[length()+1];
   WriteToFlat(this, buffer, 0, length());
   buffer[length()] = 0;
   return buffer;
 }
 
 
+static const char* const weekdays[] = {
+  "???", "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
+};
+
 void JSDate::JSDatePrint(FILE* out) {
   HeapObject::PrintHeader(out, "JSDate");
   PrintF(out, " - map = 0x%p\n", reinterpret_cast<void*>(map()));
   PrintF(out, " - value = ");
   value()->Print(out);
   if (!year()->IsSmi()) {
     PrintF(out, " - time = NaN\n");
   } else {
-    PrintF(out, " - time = %04d/%02d/%02d %02d:%02d:%02d.%03d\n",
-           Smi::cast(year())->value(),
-           Smi::cast(month())->value(),
-           Smi::cast(day())->value(),
-           Smi::cast(hour())->value(),
-           Smi::cast(min())->value(),
-           Smi::cast(sec())->value(),
-           Smi::cast(ms())->value());
+    PrintF(out, " - time = %s %04d/%02d/%02d %02d:%02d:%02d\n",
+           weekdays[weekday()->IsSmi() ? Smi::cast(weekday())->value() + 1 : 0],
+           year()->IsSmi() ? Smi::cast(year())->value() : -1,
+           month()->IsSmi() ? Smi::cast(month())->value() : -1,
+           day()->IsSmi() ? Smi::cast(day())->value() : -1,
+           hour()->IsSmi() ? Smi::cast(hour())->value() : -1,
+           min()->IsSmi() ? Smi::cast(min())->value() : -1,
+           sec()->IsSmi() ? Smi::cast(sec())->value() : -1);
   }
 }
 
 
 void JSProxy::JSProxyPrint(FILE* out) {
   HeapObject::PrintHeader(out, "JSProxy");
   PrintF(out, " - map = 0x%p\n", reinterpret_cast<void*>(map()));
   PrintF(out, " - handler = ");
   handler()->Print(out);
   PrintF(out, " - hash = ");
@@ skipping 315 matching lines @@
     desc.Print(out);
   }
   PrintF(out, "\n");
 }
 
 
 #endif  // OBJECT_PRINT
 
 
 } }  // namespace v8::internal