95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
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/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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/*
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File: DSBuffer.cpp
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Contains: Class implementation for Open Directory buffers
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(wraps tDataBufferPtr)
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Created By: chris jalbert
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Created: 28 November 2000
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*/
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// ANSI / POSIX headers
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// STL and Std C++ Library Headers
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#include <stdexcept> // for standard exceptions
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// Framework Headers
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#include <DirectoryService/DirServices.h>
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// Project Headers
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#include "DSBuffer.h"
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using namespace DirectoryServices ;
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// ----------------------------------------------------------------------------
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// <09> DSBuffer Class Globals
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// These private typedefs, globals, and functions are not declared statically
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// in the class definition because I want to hide the implementation details
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// and reduce unrelated dependencies in the class header.
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// ----------------------------------------------------------------------------
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// ----------------------------------------------------------------------------
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// <09> DSBuffer Protected Instance Methods
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// ----------------------------------------------------------------------------
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#pragma mark **** DSBuffer Protected Instance Methods ****
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// ----------------------------------------------------------------------------
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// <20><>Grow
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// All memory management (even in the c'tors) are handled in this method.
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// An inNewSize value of 0 implies the use of the default buffer size!
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// To leave the buffer alone, call with an argument value of 1.
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// ----------------------------------------------------------------------------
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tDataBufferPtr DSBuffer::grow ( size_t inNewSize )
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{
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if (!inNewSize)
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inNewSize = kDefaultSize ;
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if (mBuffer && (inNewSize <= mBuffer->fBufferSize))
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return mBuffer ;
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register size_t ulTemp = 16 ;
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if (inNewSize == kDefaultSize)
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ulTemp = inNewSize ;
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else
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for ( ; ulTemp < inNewSize ; ulTemp <<= 1) ;
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register tDataBufferPtr bufNew = ::dsDataBufferAllocate (mDirRef, ulTemp) ;
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if (!bufNew)
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throw_ds_error (eDSAllocationFailed) ;
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if (mBuffer && (ulTemp = mBuffer->fBufferLength))
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std::memcpy (bufNew->fBufferData, mBuffer->fBufferData, ulTemp) ;
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else
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ulTemp = 0 ;
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bufNew->fBufferLength = ulTemp ;
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::dsDataBufferDeAllocate (mDirRef, mBuffer) ;
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return (mBuffer = bufNew) ;
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}
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