00001 /* 00002 * Licensed to the Apache Software Foundation (ASF) under one 00003 * or more contributor license agreements. See the NOTICE file 00004 * distributed with this work for additional information 00005 * regarding copyright ownership. The ASF licenses this file 00006 * to you under the Apache License, Version 2.0 (the "License"); 00007 * you may not use this file except in compliance with the License. 00008 * You may obtain a copy of the License at 00009 * 00010 * http://www.apache.org/licenses/LICENSE-2.0 00011 * 00012 * Unless required by applicable law or agreed to in writing, software 00013 * distributed under the License is distributed on an "AS IS" BASIS, 00014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00015 * See the License for the specific language governing permissions and 00016 * limitations under the License. 00017 */ 00018 00019 #if !defined(XSTRINGALLOCATOR_INCLUDE_GUARD_1357924680) 00020 #define XSTRINGALLOCATOR_INCLUDE_GUARD_1357924680 00021 00022 00023 00024 // Base include file. Must be first. 00025 #include <xalanc/XPath/XPathDefinitions.hpp> 00026 00027 00028 00029 #include <xalanc/XPath/XString.hpp> 00030 00031 00032 00033 #include <xalanc/PlatformSupport/ReusableArenaAllocator.hpp> 00034 00035 00036 00037 XALAN_CPP_NAMESPACE_BEGIN 00038 00039 00040 00041 class XALAN_XPATH_EXPORT XStringAllocator 00042 { 00043 public: 00044 00045 typedef XString string_type; 00046 00047 typedef ReusableArenaAllocator<string_type> ArenaAllocatorType; 00048 typedef ArenaAllocatorType::size_type size_type; 00049 00050 /** 00051 * Construct an instance that will allocate blocks of the specified size. 00052 * 00053 * @param theBlockSize The block size. 00054 */ 00055 XStringAllocator(MemoryManager& theManager, size_type theBlockCount); 00056 00057 ~XStringAllocator(); 00058 00059 /** 00060 * Create an XString object from a string. 00061 * 00062 * @param theString source string 00063 * 00064 * @return a pointer to string 00065 */ 00066 string_type* 00067 createString(const XalanDOMString& theString); 00068 00069 /** 00070 * Create an XString object from a null-terminated array of characters. 00071 * 00072 * @param theString a pointer to the array 00073 * 00074 * @return a pointer to string 00075 */ 00076 string_type* 00077 createString(const XalanDOMChar* theString); 00078 00079 /** 00080 * Create an XString object from an array of characters. 00081 * 00082 * @param theString a pointer to the array 00083 * @param theLength the length of the array. 00084 * 00085 * @return a pointer to string 00086 */ 00087 string_type* 00088 createString( 00089 const XalanDOMChar* theString, 00090 XalanSize_t theLength); 00091 00092 /** 00093 * Delete an XString object from allocator. 00094 */ 00095 bool 00096 destroy(string_type* theString); 00097 00098 /** 00099 * Determine if an object is owned by the allocator... 00100 */ 00101 bool 00102 ownsObject(const string_type* theObject) 00103 { 00104 return m_allocator.ownsObject(theObject); 00105 } 00106 00107 /** 00108 * Delete all XString objects from allocator. 00109 */ 00110 void 00111 reset(); 00112 00113 /** 00114 * Get size of an ArenaBlock, that is, the number 00115 * of objects in each block. 00116 * 00117 * @return The size of the block 00118 */ 00119 size_type 00120 getBlockCount() const 00121 { 00122 return m_allocator.getBlockCount(); 00123 } 00124 00125 /** 00126 * Get the number of ArenaBlocks currently allocated. 00127 * 00128 * @return The number of blocks. 00129 */ 00130 size_type 00131 getBlockSize() const 00132 { 00133 return m_allocator.getBlockSize(); 00134 } 00135 00136 private: 00137 00138 // Not implemented... 00139 XStringAllocator(const XStringAllocator&); 00140 00141 XStringAllocator& 00142 operator=(const XStringAllocator&); 00143 00144 // Data members... 00145 ArenaAllocatorType m_allocator; 00146 }; 00147 00148 00149 00150 XALAN_CPP_NAMESPACE_END 00151 00152 00153 00154 #endif // XSTRINGALLOCATOR_INCLUDE_GUARD_1357924680
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