mirror of
https://github.com/darlinghq/darling-WTF.git
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123 lines
4.1 KiB
C++
123 lines
4.1 KiB
C++
/*
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* Copyright (C) 2013 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef StringHashDumpContext_h
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#define StringHashDumpContext_h
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#include <wtf/HashMap.h>
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#include <wtf/SixCharacterHash.h>
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#include <wtf/StdLibExtras.h>
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#include <wtf/StringPrintStream.h>
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#include <wtf/text/CString.h>
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namespace WTF {
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template<typename T>
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class StringHashDumpContext {
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public:
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StringHashDumpContext() { }
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CString getID(const T* value)
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{
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typename HashMap<const T*, CString>::iterator iter = m_forwardMap.find(value);
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if (iter != m_forwardMap.end())
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return iter->value;
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for (unsigned hashValue = toCString(*value).hash(); ; hashValue++) {
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CString fullHash = integerToSixCharacterHashString(hashValue).data();
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for (unsigned length = 2; length < 6; ++length) {
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CString shortHash = CString(fullHash.data(), length);
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if (!m_backwardMap.contains(shortHash)) {
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m_forwardMap.add(value, shortHash);
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m_backwardMap.add(shortHash, value);
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return shortHash;
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}
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}
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}
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}
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void dumpBrief(const T* value, PrintStream& out)
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{
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value->dumpBrief(out, getID(value));
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}
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CString brief(const T* value)
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{
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StringPrintStream out;
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dumpBrief(value, out);
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return out.toCString();
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}
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bool isEmpty() const { return m_forwardMap.isEmpty(); }
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void dump(PrintStream& out, const char* prefix = "") const
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{
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out.print(prefix);
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T::dumpContextHeader(out);
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out.print("\n");
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Vector<CString> keys;
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unsigned maxKeySize = 0;
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for (
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typename HashMap<CString, const T*>::const_iterator iter = m_backwardMap.begin();
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iter != m_backwardMap.end();
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++iter) {
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keys.append(iter->key);
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maxKeySize = std::max(maxKeySize, static_cast<unsigned>(brief(iter->value, iter->key).length()));
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}
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std::sort(keys.begin(), keys.end());
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for (unsigned i = 0; i < keys.size(); ++i) {
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const T* value = m_backwardMap.get(keys[i]);
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out.print(prefix, " ");
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CString briefString = brief(value, keys[i]);
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out.print(briefString);
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for (unsigned n = briefString.length(); n < maxKeySize; ++n)
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out.print(" ");
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out.print(" = ", *value, "\n");
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}
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}
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public:
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static CString brief(const T* value, const CString& string)
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{
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StringPrintStream out;
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value->dumpBrief(out, string);
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return out.toCString();
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}
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HashMap<const T*, CString> m_forwardMap;
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HashMap<CString, const T*> m_backwardMap;
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};
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} // namespace WTF
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using WTF::StringHashDumpContext;
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#endif // StringHashDumpContext_h
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