/* * Copyright (C) 2012, 2013 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. ``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 * 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 "CodeBlockHash.h" #include "SourceCode.h" #include <wtf/SHA1.h> #include <wtf/SixCharacterHash.h> namespace JSC { CodeBlockHash::CodeBlockHash(const char* string) : m_hash(sixCharacterHashStringToInteger(string)) { } CodeBlockHash::CodeBlockHash(const SourceCode& sourceCode, CodeSpecializationKind kind) : m_hash(0) { SHA1 sha1; sha1.addBytes(sourceCode.toUTF8()); SHA1::Digest digest; sha1.computeHash(digest); m_hash += digest[0] | (digest[1] << 8) | (digest[2] << 16) | (digest[3] << 24); m_hash ^= static_cast<unsigned>(kind); // Ensure that 0 corresponds to the hash not having been computed. if (!m_hash) m_hash = 1; } void CodeBlockHash::dump(PrintStream& out) const { std::array<char, 7> buffer = integerToSixCharacterHashString(m_hash); #if !ASSERT_DISABLED CodeBlockHash recompute(buffer.data()); ASSERT(recompute == *this); #endif // !ASSERT_DISABLED out.print(buffer.data()); } } // namespace JSC