| /* |
| * 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. |
| */ |
| |
| /** |
| * $Id$ |
| */ |
| |
| |
| // --------------------------------------------------------------------------- |
| // Includes |
| // --------------------------------------------------------------------------- |
| #include <xercesc/framework/XMLBuffer.hpp> |
| #include <xercesc/util/XMLString.hpp> |
| #include <xercesc/util/RuntimeException.hpp> |
| |
| XERCES_CPP_NAMESPACE_BEGIN |
| |
| // --------------------------------------------------------------------------- |
| // XMLBuffer: Buffer management |
| // --------------------------------------------------------------------------- |
| |
| void XMLBuffer::ensureCapacity(const XMLSize_t extraNeeded) |
| { |
| // If we can't handle it, try doubling the buffer size. |
| XMLSize_t newCap = (fIndex + extraNeeded) * 2; |
| |
| // If a maximum size is set, and double the current buffer size exceeds that |
| // maximum, first check if the maximum size will accomodate the extra needed. |
| if (fFullHandler && (newCap > fFullSize)) |
| { |
| // If the maximum buffer size accomodates the extra needed, resize to |
| // the maximum |
| if (fIndex + extraNeeded <= fFullSize) |
| { |
| newCap = fFullSize; |
| } |
| |
| // Otherwise, allow the registered full-handler to try to empty the buffer. |
| // If it claims success, and we can accommodate the extra needed in the buffer |
| // to be expanded, resize to the maximum |
| // Note the order of evaluation: bufferFull() has the intentional side-effect |
| // of modifying fIndex. |
| else if (fFullHandler->bufferFull(*this) && (fIndex + extraNeeded <= fFullSize)) |
| { |
| newCap = fFullSize; |
| } |
| |
| // Finally, if the full-handler failed, or the buffer (of maximum size) |
| // still can't accomodate the extra needed, we must fail. |
| else |
| ThrowXMLwithMemMgr(RuntimeException, XMLExcepts::Array_BadNewSize, fMemoryManager); |
| } |
| |
| // Note the previous if block can modify newCap, so we may not need to allocate |
| // at all. |
| if (newCap > fCapacity) |
| { |
| // Allocate new buffer |
| XMLCh* newBuf = (XMLCh*) fMemoryManager->allocate((newCap+1) * sizeof(XMLCh)); //new XMLCh[newCap+1]; |
| |
| // Copy over the old stuff |
| memcpy(newBuf, fBuffer, fIndex * sizeof(XMLCh)); |
| |
| // Clean up old buffer and store new stuff |
| fMemoryManager->deallocate(fBuffer); //delete [] fBuffer; |
| fBuffer = newBuf; |
| fCapacity = newCap; |
| } |
| } |
| |
| XERCES_CPP_NAMESPACE_END |
| |