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80 lines
3.2 KiB
C
80 lines
3.2 KiB
C
/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
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/*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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// Convience macros for converting nsString's to chars +
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// creating temporary char[] bufs.
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#ifndef NS_STR_UTIL_H
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#define NS_STR_UTIL_H
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// nsString to temporary char[] macro
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// Convience MACROS to convert an nsString to a char * which use a
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// static char array if possible to reduce memory fragmentation,
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// otherwise they allocate a char[] which must be freed.
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// REMEMBER to always use the NS_FREE_STR_BUF after using the
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// NS_ALLOC_STR_BUF. You can not nest NS_ALLOC_STR_BUF's.
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#define NS_ALLOC_STR_BUF(varName, strName, tempSize) \
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static const int _ns_kSmallBufferSize = tempSize; \
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char* varName = 0; \
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int _ns_smallBufUsed = 0; \
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char _ns_smallBuffer[_ns_kSmallBufferSize]; \
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if (strName.Length() < (_ns_kSmallBufferSize - 1)) { \
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strName.ToCString(_ns_smallBuffer, _ns_kSmallBufferSize); \
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_ns_smallBuffer[_ns_kSmallBufferSize - 1] = '\0'; \
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_ns_smallBufUsed = 1; \
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varName = _ns_smallBuffer; \
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} \
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else { \
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varName = strName.ToNewCString(); \
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}
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#define NS_FREE_STR_BUF(varName) \
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if (! _ns_smallBufUsed) \
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delete varName;
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// Create temporary char[] macro
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//
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// Create a temporary buffer for storing chars.
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// If the actual size is > size then the buffer
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// is allocated from the heap, otherwise the buffer
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// is a stack variable. REMEMBER: use NS_FREE_BUF
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// when finished with the buffer allocated, and do
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// NOT nest INSERT_BUF'S.
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#define NS_ALLOC_CHAR_BUF(aBuf, aSize, aActualSize) \
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char *aBuf; \
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int _ns_smallBufUsed = 0; \
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static const int _ns_kSmallBufferSize = aSize; \
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if (aActualSize < _ns_kSmallBufferSize) { \
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char _ns_smallBuffer[_ns_kSmallBufferSize]; \
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aBuf = _ns_smallBuffer; \
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_ns_smallBufUsed = 1; \
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} \
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else { \
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aBuf = new char[aActualSize]; \
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}
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#define NS_FREE_CHAR_BUF(aBuf) \
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if (! _ns_smallBufUsed) \
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delete aBuf;
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#endif // NSStringUtil
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