1 files changed, 89 insertions, 0 deletions

diff --git a/source/Plugins/Language/ObjC/CoreMedia.cpp b/source/Plugins/Language/ObjC/CoreMedia.cpp
new file mode 100644
index 0000000000000..4103067b8d582
--- /dev/null
+++ b/source/Plugins/Language/ObjC/CoreMedia.cpp
@@ -0,0 +1,89 @@
+//===-- CoreMedia.cpp --------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CoreMedia.h"
+
+#include "lldb/Core/Flags.h"
+#include "lldb/Symbol/TypeSystem.h"
+#include "lldb/Target/Target.h"
+#include <inttypes.h>
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace lldb_private::formatters;
+
+bool
+lldb_private::formatters::CMTimeSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
+{
+    CompilerType type = valobj.GetCompilerType();
+    if (!type.IsValid())
+        return false;
+
+    TypeSystem *type_system = valobj.GetExecutionContextRef().GetTargetSP()->GetScratchTypeSystemForLanguage(nullptr, lldb::eLanguageTypeC);
+    if (!type_system)
+        return false;
+    
+    // fetch children by offset to compensate for potential lack of debug info
+    auto int64_ty = type_system->GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 64);
+    auto int32_ty = type_system->GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 32);
+    
+    auto value_sp(valobj.GetSyntheticChildAtOffset(0, int64_ty, true));
+    auto timescale_sp(valobj.GetSyntheticChildAtOffset(8, int32_ty, true));
+    auto flags_sp(valobj.GetSyntheticChildAtOffset(12, int32_ty, true));
+    
+    if (!value_sp || !timescale_sp || !flags_sp)
+        return false;
+    
+    auto value = value_sp->GetValueAsUnsigned(0);
+    auto timescale = (int32_t)timescale_sp->GetValueAsUnsigned(0); // the timescale specifies the fraction of a second each unit in the numerator occupies
+    auto flags = Flags(flags_sp->GetValueAsUnsigned(0) & 0x00000000000000FF); // the flags I need sit in the LSB
+    
+    const unsigned int FlagPositiveInf = 4;
+    const unsigned int FlagNegativeInf = 8;
+    const unsigned int FlagIndefinite = 16;
+    
+    if (flags.AnySet(FlagIndefinite))
+    {
+        stream.Printf("indefinite");
+        return true;
+    }
+    
+    if (flags.AnySet(FlagPositiveInf))
+    {
+        stream.Printf("+oo");
+        return true;
+    }
+    
+    if (flags.AnySet(FlagNegativeInf))
+    {
+        stream.Printf("-oo");
+        return true;
+    }
+    
+    if (timescale == 0)
+        return false;
+    
+    switch (timescale)
+    {
+        case 0:
+            return false;
+        case 1:
+            stream.Printf("%" PRId64 " seconds", value);
+            return true;
+        case 2:
+            stream.Printf("%" PRId64 " half seconds", value);
+            return true;
+        case 3:
+            stream.Printf("%" PRId64 " third%sof a second", value, value == 1 ? " " : "s ");
+            return true;
+        default:
+            stream.Printf("%" PRId64 " %" PRId32 "th%sof a second", value, timescale, value == 1 ? " " : "s ");
+            return true;
+    }
+}