| /* |
| * 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. |
| */ |
| |
| /* |
| * $Id$ |
| */ |
| |
| #if !defined(XERCESC_INCLUDE_GUARD_DOMSTRINGPOOL_HPP) |
| #define XERCESC_INCLUDE_GUARD_DOMSTRINGPOOL_HPP |
| |
| // |
| // This file is part of the internal implementation of the C++ XML DOM. |
| // It should NOT be included or used directly by application programs. |
| // |
| // Applications should include the file <xercesc/dom/DOM.hpp> for the entire |
| // DOM API, or xercesc/dom/DOM*.hpp for individual DOM classes, where the class |
| // name is substituded for the *. |
| // |
| |
| #include <xercesc/util/XercesDefs.hpp> |
| |
| XERCES_CPP_NAMESPACE_BEGIN |
| |
| class DOMDocumentImpl; |
| |
| // |
| // DStringPoolEntry - one of these structs is allocated for each |
| // XMLCh String in the pool. Each slot in the |
| // hash table array itself is a pointer to the head |
| // of a singly-linked list of these structs. |
| // |
| // Although this struct is declared with a string length of one, |
| // the factory method allocates enough storage to hold the full |
| // string length. |
| // |
| struct DOMStringPoolEntry |
| { |
| DOMStringPoolEntry *fNext; |
| XMLSize_t fLength; |
| XMLCh fString[1]; |
| }; |
| |
| // |
| // DOMBuffer is a lightweight text buffer |
| // The buffer is not nul terminated until some asks to see the raw buffer |
| // contents. This also avoids overhead during append operations. |
| class DOMBuffer |
| { |
| public : |
| // ----------------------------------------------------------------------- |
| // Constructors and Destructor |
| // ----------------------------------------------------------------------- |
| DOMBuffer(DOMDocumentImpl *doc, XMLSize_t capacity = 31); |
| |
| ~DOMBuffer() |
| { |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Buffer Management |
| // ----------------------------------------------------------------------- |
| void append (const XMLCh* const chars); |
| void append (const XMLCh* const chars, const XMLSize_t count); |
| void appendInPlace (const XMLCh* const chars, const XMLSize_t count); |
| |
| void set (const XMLCh* const chars); |
| void set (const XMLCh* const chars, const XMLSize_t count); |
| |
| const XMLCh* getRawBuffer() const |
| { |
| fBuffer[fIndex] = 0; |
| return fBuffer; |
| } |
| |
| void reset() |
| { |
| fIndex = 0; |
| fBuffer[0] = 0; |
| } |
| |
| void chop |
| ( |
| const XMLSize_t count |
| ) |
| { |
| fBuffer[count] = 0; |
| fIndex = count; |
| } |
| |
| |
| // ----------------------------------------------------------------------- |
| // Getters |
| // ----------------------------------------------------------------------- |
| XMLSize_t getLen() const |
| { |
| return fIndex; |
| } |
| |
| XMLSize_t getCapacity() const |
| { |
| return fCapacity; |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Private helpers |
| // ----------------------------------------------------------------------- |
| void expandCapacity(const XMLSize_t extraNeeded, bool releasePrevious = false); |
| |
| |
| private : |
| // ----------------------------------------------------------------------- |
| // Private data members |
| // |
| // fBuffer |
| // The pointer to the buffer data. Its grown as needed. Its always |
| // one larger than fCapacity, to leave room for the null terminator. |
| // |
| // fIndex |
| // The current index into the buffer, as characters are appended |
| // to it. If its zero, then the buffer is empty. |
| // |
| // fCapacity |
| // The current capacity of the buffer. Its actually always one |
| // larger, to leave room for the null terminator. |
| // |
| // fDoc |
| // For allocating memory |
| // ----------------------------------------------------------------------- |
| XMLCh* fBuffer; |
| XMLSize_t fIndex; |
| XMLSize_t fCapacity; |
| DOMDocumentImpl* fDoc; |
| |
| // ----------------------------------------------------------------------- |
| // Unimplemented constructors and operators |
| // ----------------------------------------------------------------------- |
| DOMBuffer(const DOMBuffer &); |
| DOMBuffer & operator = (const DOMBuffer &); |
| }; |
| |
| inline void DOMBuffer:: |
| append (const XMLCh* const chars) |
| { |
| XMLSize_t count = XMLString::stringLen(chars); |
| if (fIndex + count >= fCapacity) |
| expandCapacity(count); |
| |
| memcpy(&fBuffer[fIndex], chars, count * sizeof(XMLCh)); |
| fIndex += count; |
| |
| // Keep it null terminated |
| fBuffer[fIndex] = 0; |
| } |
| |
| inline void DOMBuffer:: |
| append (const XMLCh* const chars, const XMLSize_t count) |
| { |
| if (fIndex + count >= fCapacity) |
| expandCapacity(count); |
| |
| memcpy(&fBuffer[fIndex], chars, count * sizeof(XMLCh)); |
| fIndex += count; |
| |
| // Keep it null terminated |
| fBuffer[fIndex] = 0; |
| } |
| |
| inline void DOMBuffer:: |
| appendInPlace (const XMLCh* const chars, const XMLSize_t count) |
| { |
| if (fIndex + count >= fCapacity) |
| expandCapacity(count, true); |
| |
| memcpy(&fBuffer[fIndex], chars, count * sizeof(XMLCh)); |
| fIndex += count; |
| |
| // Keep it null terminated |
| fBuffer[fIndex] = 0; |
| } |
| |
| inline void DOMBuffer:: |
| set (const XMLCh* const chars) |
| { |
| XMLSize_t count = XMLString::stringLen(chars); |
| fIndex = 0; |
| if (count >= fCapacity) |
| expandCapacity(count); |
| |
| memcpy(fBuffer, chars, count * sizeof(XMLCh)); |
| fIndex = count; |
| |
| // Keep it null terminated |
| fBuffer[fIndex] = 0; |
| } |
| |
| inline void DOMBuffer:: |
| set (const XMLCh* const chars, const XMLSize_t count) |
| { |
| fIndex = 0; |
| if (count >= fCapacity) |
| expandCapacity(count); |
| |
| memcpy(fBuffer, chars, count * sizeof(XMLCh)); |
| fIndex = count; |
| |
| // Keep it null terminated |
| fBuffer[fIndex] = 0; |
| } |
| |
| XERCES_CPP_NAMESPACE_END |
| |
| #endif |