Add an LLDB summary for CMTime. Fixes rdar://15370376

llvm-svn: 228759

2 files changed, 104 insertions, 0 deletions

diff --git a/lldb/source/DataFormatters/CoreMedia.cpp b/lldb/source/DataFormatters/CoreMedia.cpp
new file mode 100644
index 00000000000..003d01f1569
--- /dev/null
+++ b/lldb/source/DataFormatters/CoreMedia.cpp
@@ -0,0 +1,85 @@
+//===-- 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 "lldb/DataFormatters/CXXFormatterFunctions.h"
+
+#include "lldb/Core/Flags.h"
+#include "lldb/Symbol/ClangASTContext.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)
+{
+    ClangASTContext *ast_ctx = ClangASTContext::GetASTContext(valobj.GetClangType().GetASTContext());
+    if (!ast_ctx)
+        return false;
+    
+    // fetch children by offset to compensate for potential lack of debug info
+    auto int64_ty = ast_ctx->GetIntTypeFromBitSize(64, true);
+    auto int32_ty = ast_ctx->GetIntTypeFromBitSize(32, true);
+    
+    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 " of a second", value, timescale);
+            return true;
+    }
+}
diff --git a/lldb/source/DataFormatters/FormatManager.cpp b/lldb/source/DataFormatters/FormatManager.cpp
index ae52b3309ed..324f05b8f6a 100644
--- a/lldb/source/DataFormatters/FormatManager.cpp
+++ b/lldb/source/DataFormatters/FormatManager.cpp
@@ -866,6 +866,7 @@ FormatManager::FormatManager() :
     m_coreservices_category_name(ConstString("CoreServices")),
     m_vectortypes_category_name(ConstString("VectorTypes")),
     m_appkit_category_name(ConstString("AppKit")),
+    m_coremedia_category_name(ConstString("CoreMedia")),
     m_hardcoded_formats(),
     m_hardcoded_summaries(),
     m_hardcoded_synthetics(),
@@ -876,6 +877,7 @@ FormatManager::FormatManager() :
     LoadLibStdcppFormatters();
     LoadLibcxxFormatters();
     LoadObjCFormatters();
+    LoadCoreMediaFormatters();
     LoadHardcodedFormatters();
     
     EnableCategory(m_objc_category_name,TypeCategoryMap::Last);
@@ -1563,6 +1565,23 @@ FormatManager::LoadObjCFormatters()
 }
 
 void
+FormatManager::LoadCoreMediaFormatters()
+{
+    TypeSummaryImpl::Flags cm_flags;
+    cm_flags.SetCascades(true)
+    .SetDontShowChildren(false)
+    .SetDontShowValue(false)
+    .SetHideItemNames(false)
+    .SetShowMembersOneLiner(false)
+    .SetSkipPointers(false)
+    .SetSkipReferences(false);
+    
+    TypeCategoryImpl::SharedPointer cm_category_sp = GetCategory(m_coremedia_category_name);
+
+    AddCXXSummary(cm_category_sp, lldb_private::formatters::CMTimeSummaryProvider, "CMTime summary provider", ConstString("CMTime"), cm_flags);
+}
+
+void
 FormatManager::LoadHardcodedFormatters()
 {
     {