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/**************************************************************
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_sal.hxx"
#include "rtl/allocator.hxx"
#include "hash.h"
#include "strimp.h"
#include <hash_set>
namespace {
struct UStringHash
{
size_t operator()(rtl_uString * const &rString) const
{ return (size_t)rtl_ustr_hashCode_WithLength( rString->buffer, rString->length ); }
};
struct UStringEqual
{
sal_Bool operator() ( rtl_uString * const &pStringA,
rtl_uString * const &pStringB) const
{
if (pStringA == pStringB)
return true;
if (pStringA->length != pStringB->length)
return false;
return !rtl_ustr_compare_WithLength( pStringA->buffer, pStringA->length,
pStringB->buffer, pStringB->length);
}
};
typedef std::hash_set< rtl_uString *, UStringHash, UStringEqual,
rtl::Allocator<rtl_uString *> > StringHashTable;
StringHashTable *
getHashTable ()
{
static StringHashTable *pInternPool = NULL;
if (pInternPool == NULL) {
static StringHashTable aImpl(1024);
pInternPool = &aImpl;
}
return pInternPool;
}
}
extern "C" {
rtl_uString *
rtl_str_hash_intern (rtl_uString *pString,
int can_return)
{
StringHashTable *pHash = getHashTable();
StringHashTable::iterator aIter;
aIter = pHash->find(pString);
if (aIter != pHash->end())
{
rtl_uString *pHashStr = *aIter;
rtl_uString_acquire (pHashStr);
return pHashStr;
}
if (!can_return)
{
rtl_uString *pCopy = NULL;
rtl_uString_newFromString( &pCopy, pString );
pString = pCopy;
if (!pString)
return NULL;
}
if (!SAL_STRING_IS_STATIC (pString))
pString->refCount |= SAL_STRING_INTERN_FLAG;
pHash->insert(pString);
return pString;
}
void
rtl_str_hash_remove (rtl_uString *pString)
{
getHashTable()->erase(pString);
}
}
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