Initial checkin of lldb code from internal Apple repo.

llvm-svn: 105619

1 files changed, 122 insertions, 0 deletions

diff --git a/lldb/source/Core/Flags.cpp b/lldb/source/Core/Flags.cpp
new file mode 100644
index 00000000000..13cbd85915b
--- /dev/null
+++ b/lldb/source/Core/Flags.cpp
@@ -0,0 +1,122 @@
+//===-- Flags.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/Core/Flags.h"
+
+using namespace lldb_private;
+
+//----------------------------------------------------------------------
+// Default Constructor
+//----------------------------------------------------------------------
+Flags::Flags (ValueType flags) :
+    m_flags(flags)
+{
+}
+
+//----------------------------------------------------------------------
+// Copy Constructor
+//----------------------------------------------------------------------
+Flags::Flags (const Flags& rhs) :
+    m_flags(rhs.m_flags)
+{
+}
+
+//----------------------------------------------------------------------
+// Virtual destructor in case anyone inherits from this class.
+//----------------------------------------------------------------------
+Flags::~Flags ()
+{
+}
+
+//----------------------------------------------------------------------
+// Get accessor for all of the current flag bits.
+//----------------------------------------------------------------------
+Flags::ValueType
+Flags::GetAllFlagBits () const
+{
+    return m_flags;
+}
+
+size_t
+Flags::GetBitSize() const
+{
+    return sizeof (ValueType) * 8;
+}
+
+//----------------------------------------------------------------------
+// Set accessor for all of the current flag bits.
+//----------------------------------------------------------------------
+void
+Flags::SetAllFlagBits (ValueType flags)
+{
+    m_flags = flags;
+}
+
+//----------------------------------------------------------------------
+// Clear one or more bits in our flag bits
+//----------------------------------------------------------------------
+Flags::ValueType
+Flags::Clear (ValueType bits)
+{
+    m_flags &= ~bits;
+    return m_flags;
+}
+
+//----------------------------------------------------------------------
+// Set one or more bits in our flag bits
+//----------------------------------------------------------------------
+Flags::ValueType
+Flags::Set (ValueType bits)
+{
+    m_flags |= bits;
+    return m_flags;
+}
+
+//----------------------------------------------------------------------
+// Returns true if any flag bits in "bits" are set
+//----------------------------------------------------------------------
+bool
+Flags::IsSet (ValueType bits) const
+{
+    return (m_flags & bits) != 0;
+}
+
+//----------------------------------------------------------------------
+// Returns true if all flag bits in "bits" are clear
+//----------------------------------------------------------------------
+bool
+Flags::IsClear (ValueType bits) const
+{
+    return (m_flags & bits) == 0;
+}
+
+
+size_t
+Flags::SetCount () const
+{
+    size_t count = 0;
+    for (ValueType mask = m_flags; mask; mask >>= 1)
+    {
+        if (mask & 1)
+            ++count;
+    }
+    return count;
+}
+
+size_t
+Flags::ClearCount () const
+{
+    size_t count = 0;
+    for (ValueType shift = 0; shift < sizeof(ValueType)*8; ++shift)
+    {
+        if ((m_flags & (1u << shift)) == 0)
+            ++count;
+    }
+    return count;
+}