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/*
* Copyright (C) 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.
*/
#ifndef StringHashDumpContext_h
#define StringHashDumpContext_h
#include <wtf/HashMap.h>
#include <wtf/SixCharacterHash.h>
#include <wtf/StdLibExtras.h>
#include <wtf/StringPrintStream.h>
#include <wtf/text/CString.h>
namespace WTF {
template<typename T>
class StringHashDumpContext {
public:
StringHashDumpContext() { }
CString getID(const T* value)
{
typename HashMap<const T*, CString>::iterator iter = m_forwardMap.find(value);
if (iter != m_forwardMap.end())
return iter->value;
for (unsigned hashValue = toCString(*value).hash(); ; hashValue++) {
CString fullHash = integerToSixCharacterHashString(hashValue).data();
for (unsigned length = 2; length < 6; ++length) {
CString shortHash = CString(fullHash.data(), length);
if (!m_backwardMap.contains(shortHash)) {
m_forwardMap.add(value, shortHash);
m_backwardMap.add(shortHash, value);
return shortHash;
}
}
}
}
void dumpBrief(const T* value, PrintStream& out)
{
value->dumpBrief(out, getID(value));
}
CString brief(const T* value)
{
StringPrintStream out;
dumpBrief(value, out);
return out.toCString();
}
bool isEmpty() const { return m_forwardMap.isEmpty(); }
void dump(PrintStream& out, const char* prefix = "") const
{
out.print(prefix);
T::dumpContextHeader(out);
out.print("\n");
Vector<CString> keys;
unsigned maxKeySize = 0;
for (
typename HashMap<CString, const T*>::const_iterator iter = m_backwardMap.begin();
iter != m_backwardMap.end();
++iter) {
keys.append(iter->key);
maxKeySize = std::max(maxKeySize, static_cast<unsigned>(brief(iter->value, iter->key).length()));
}
std::sort(keys.begin(), keys.end());
for (unsigned i = 0; i < keys.size(); ++i) {
const T* value = m_backwardMap.get(keys[i]);
out.print(prefix, " ");
CString briefString = brief(value, keys[i]);
out.print(briefString);
for (unsigned n = briefString.length(); n < maxKeySize; ++n)
out.print(" ");
out.print(" = ", *value, "\n");
}
}
public:
static CString brief(const T* value, const CString& string)
{
StringPrintStream out;
value->dumpBrief(out, string);
return out.toCString();
}
HashMap<const T*, CString> m_forwardMap;
HashMap<CString, const T*> m_backwardMap;
};
} // namespace WTF
using WTF::StringHashDumpContext;
#endif // StringHashDumpContext_h
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