| /************************************************************** |
| * |
| * 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 "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 > 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); |
| } |
| |
| } |