1 files changed, 126 insertions, 0 deletions
diff --git a/Source/WTF/wtf/persistence/Encoder.cpp b/Source/WTF/wtf/persistence/Encoder.cpp
new file mode 100644
index 000000000..0f11e3481
--- /dev/null
+++ b/Source/WTF/wtf/persistence/Encoder.cpp
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2010, 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "Encoder.h"
+
+#include "SHA1.h"
+
+namespace WTF {
+namespace Persistence {
+
+Encoder::Encoder()
+{
+}
+
+Encoder::~Encoder()
+{
+}
+
+uint8_t* Encoder::grow(size_t size)
+{
+    size_t newPosition = m_buffer.size();
+    m_buffer.grow(m_buffer.size() + size);
+    return m_buffer.data() + newPosition;
+}
+
+void Encoder::updateChecksumForData(SHA1& sha1, const uint8_t* data, size_t size)
+{
+    auto typeSalt = Salt<uint8_t*>::value;
+    sha1.addBytes(reinterpret_cast<uint8_t*>(&typeSalt), sizeof(typeSalt));
+    sha1.addBytes(data, size);
+}
+
+void Encoder::encodeFixedLengthData(const uint8_t* data, size_t size)
+{
+    updateChecksumForData(m_sha1, data, size);
+
+    uint8_t* buffer = grow(size);
+    memcpy(buffer, data, size);
+}
+
+template<typename Type>
+void Encoder::encodeNumber(Type value)
+{
+    Encoder::updateChecksumForNumber(m_sha1, value);
+
+    uint8_t* buffer = grow(sizeof(Type));
+    memcpy(buffer, &value, sizeof(Type));
+}
+
+void Encoder::encode(bool value)
+{
+    encodeNumber(value);
+}
+
+void Encoder::encode(uint8_t value)
+{
+    encodeNumber(value);
+}
+
+void Encoder::encode(uint16_t value)
+{
+    encodeNumber(value);
+}
+
+void Encoder::encode(uint32_t value)
+{
+    encodeNumber(value);
+}
+
+void Encoder::encode(uint64_t value)
+{
+    encodeNumber(value);
+}
+
+void Encoder::encode(int32_t value)
+{
+    encodeNumber(value);
+}
+
+void Encoder::encode(int64_t value)
+{
+    encodeNumber(value);
+}
+
+void Encoder::encode(float value)
+{
+    encodeNumber(value);
+}
+
+void Encoder::encode(double value)
+{
+    encodeNumber(value);
+}
+
+void Encoder::encodeChecksum()
+{
+    SHA1::Digest hash;
+    m_sha1.computeHash(hash);
+    encodeFixedLengthData(hash.data(), hash.size());
+}
+
+}
+}