Merge System into Support.

llvm-svn: 120298

1 files changed, 57 insertions, 0 deletions

diff --git a/llvm/lib/Support/TimeValue.cpp b/llvm/lib/Support/TimeValue.cpp
new file mode 100644
index 00000000000..1a0f7bc3639
--- /dev/null
+++ b/llvm/lib/Support/TimeValue.cpp
@@ -0,0 +1,57 @@
+//===-- TimeValue.cpp - Implement OS TimeValue Concept ----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements the operating system TimeValue concept.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/TimeValue.h"
+#include "llvm/Config/config.h"
+
+namespace llvm {
+using namespace sys;
+
+const TimeValue TimeValue::MinTime       = TimeValue ( INT64_MIN,0 );
+const TimeValue TimeValue::MaxTime       = TimeValue ( INT64_MAX,0 );
+const TimeValue TimeValue::ZeroTime      = TimeValue ( 0,0 );
+const TimeValue TimeValue::PosixZeroTime = TimeValue ( -946684800,0 );
+const TimeValue TimeValue::Win32ZeroTime = TimeValue ( -12591158400ULL,0 );
+
+void
+TimeValue::normalize( void ) {
+  if ( nanos_ >= NANOSECONDS_PER_SECOND ) {
+    do {
+      seconds_++;
+      nanos_ -= NANOSECONDS_PER_SECOND;
+    } while ( nanos_ >= NANOSECONDS_PER_SECOND );
+  } else if (nanos_ <= -NANOSECONDS_PER_SECOND ) {
+    do {
+      seconds_--;
+      nanos_ += NANOSECONDS_PER_SECOND;
+    } while (nanos_ <= -NANOSECONDS_PER_SECOND);
+  }
+
+  if (seconds_ >= 1 && nanos_ < 0) {
+    seconds_--;
+    nanos_ += NANOSECONDS_PER_SECOND;
+  } else if (seconds_ < 0 && nanos_ > 0) {
+    seconds_++;
+    nanos_ -= NANOSECONDS_PER_SECOND;
+  }
+}
+
+}
+
+/// Include the platform specific portion of TimeValue class
+#ifdef LLVM_ON_UNIX
+#include "Unix/TimeValue.inc"
+#endif
+#ifdef LLVM_ON_WIN32
+#include "Windows/TimeValue.inc"
+#endif