1 files changed, 80 insertions, 0 deletions
diff --git a/gfx/angle/src/common/MemoryBuffer.cpp b/gfx/angle/src/common/MemoryBuffer.cpp
new file mode 100755
index 000000000..e7a3fb4a2
--- /dev/null
+++ b/gfx/angle/src/common/MemoryBuffer.cpp
@@ -0,0 +1,80 @@
+//
+// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "common/MemoryBuffer.h"
+
+#include <algorithm>
+#include <cstdlib>
+
+#include "common/debug.h"
+
+namespace rx
+{
+
+MemoryBuffer::MemoryBuffer()
+    : mSize(0),
+      mData(NULL)
+{
+}
+
+MemoryBuffer::~MemoryBuffer()
+{
+    free(mData);
+    mData = NULL;
+}
+
+bool MemoryBuffer::resize(size_t size)
+{
+    if (size == 0)
+    {
+        free(mData);
+        mData = NULL;
+        mSize = 0;
+        return true;
+    }
+
+    if (size == mSize)
+    {
+        return true;
+    }
+
+    // Only reallocate if the size has changed.
+    uint8_t *newMemory = reinterpret_cast<uint8_t*>(malloc(sizeof(uint8_t) * size));
+    if (newMemory == NULL)
+    {
+        return false;
+    }
+
+    if (mData)
+    {
+        // Copy the intersection of the old data and the new data
+        std::copy(mData, mData + std::min(mSize, size), newMemory);
+        free(mData);
+    }
+
+    mData = newMemory;
+    mSize = size;
+
+    return true;
+}
+
+size_t MemoryBuffer::size() const
+{
+    return mSize;
+}
+
+const uint8_t *MemoryBuffer::data() const
+{
+    return mData;
+}
+
+uint8_t *MemoryBuffer::data()
+{
+    ASSERT(mData);
+    return mData;
+}
+
+}