1 files changed, 156 insertions, 0 deletions
diff --git a/Source/WTF/wtf/persistence/Coders.cpp b/Source/WTF/wtf/persistence/Coders.cpp
new file mode 100644
index 000000000..7cd42f488
--- /dev/null
+++ b/Source/WTF/wtf/persistence/Coders.cpp
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2011, 2014-2015 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 "Coders.h"
+
+#include <wtf/text/CString.h>
+#include <wtf/text/WTFString.h>
+
+namespace WTF {
+namespace Persistence {
+
+void Coder<AtomicString>::encode(Encoder& encoder, const AtomicString& atomicString)
+{
+    encoder << atomicString.string();
+}
+
+bool Coder<AtomicString>::decode(Decoder& decoder, AtomicString& atomicString)
+{
+    String string;
+    if (!decoder.decode(string))
+        return false;
+
+    atomicString = string;
+    return true;
+}
+
+void Coder<CString>::encode(Encoder& encoder, const CString& string)
+{
+    // Special case the null string.
+    if (string.isNull()) {
+        encoder << std::numeric_limits<uint32_t>::max();
+        return;
+    }
+
+    uint32_t length = string.length();
+    encoder << length;
+    encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(string.data()), length);
+}
+
+bool Coder<CString>::decode(Decoder& decoder, CString& result)
+{
+    uint32_t length;
+    if (!decoder.decode(length))
+        return false;
+
+    if (length == std::numeric_limits<uint32_t>::max()) {
+        // This is the null string.
+        result = CString();
+        return true;
+    }
+
+    // Before allocating the string, make sure that the decoder buffer is big enough.
+    if (!decoder.bufferIsLargeEnoughToContain<char>(length))
+        return false;
+
+    char* buffer;
+    CString string = CString::newUninitialized(length, buffer);
+    if (!decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(buffer), length))
+        return false;
+
+    result = string;
+    return true;
+}
+
+
+void Coder<String>::encode(Encoder& encoder, const String& string)
+{
+    // Special case the null string.
+    if (string.isNull()) {
+        encoder << std::numeric_limits<uint32_t>::max();
+        return;
+    }
+
+    uint32_t length = string.length();
+    bool is8Bit = string.is8Bit();
+
+    encoder << length << is8Bit;
+
+    if (is8Bit)
+        encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(string.characters8()), length * sizeof(LChar));
+    else
+        encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(string.characters16()), length * sizeof(UChar));
+}
+
+template <typename CharacterType>
+static inline bool decodeStringText(Decoder& decoder, uint32_t length, String& result)
+{
+    // Before allocating the string, make sure that the decoder buffer is big enough.
+    if (!decoder.bufferIsLargeEnoughToContain<CharacterType>(length))
+        return false;
+
+    CharacterType* buffer;
+    String string = String::createUninitialized(length, buffer);
+    if (!decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(buffer), length * sizeof(CharacterType)))
+        return false;
+    
+    result = string;
+    return true;    
+}
+
+bool Coder<String>::decode(Decoder& decoder, String& result)
+{
+    uint32_t length;
+    if (!decoder.decode(length))
+        return false;
+
+    if (length == std::numeric_limits<uint32_t>::max()) {
+        // This is the null string.
+        result = String();
+        return true;
+    }
+
+    bool is8Bit;
+    if (!decoder.decode(is8Bit))
+        return false;
+
+    if (is8Bit)
+        return decodeStringText<LChar>(decoder, length, result);
+    return decodeStringText<UChar>(decoder, length, result);
+}
+
+void Coder<SHA1::Digest>::encode(Encoder& encoder, const SHA1::Digest& digest)
+{
+    encoder.encodeFixedLengthData(digest.data(), sizeof(digest));
+}
+
+bool Coder<SHA1::Digest>::decode(Decoder& decoder, SHA1::Digest& digest)
+{
+    return decoder.decodeFixedLengthData(digest.data(), sizeof(digest));
+}
+
+}
+}