gecko-dev/widget/public/nsStringUtil.h

55 lines
1.9 KiB
C

/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
/*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (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.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
// Convience macros for converting nsString's to chars +
// creating temporary char[] bufs.
#ifndef NS_STR_UTIL_H
#define NS_STR_UTIL_H
// nsString to temporary char[] macro
// Convience MACROS to convert an nsString to a char * which use a
// static char array if possible to reduce memory fragmentation,
// otherwise they allocate a char[] which must be freed.
// REMEMBER to always use the NS_FREE_STR_BUF after using the
// NS_ALLOC_STR_BUF. You can not nest NS_ALLOC_STR_BUF's.
#define NS_ALLOC_CHAR_BUF(aBuf, aSize, aActualSize) \
int _ns_tmpActualSize = aActualSize; \
char _ns_smallBuffer[aSize]; \
char * const aBuf = _ns_tmpActualSize <= aSize ? _ns_smallBuffer : new char[_ns_tmpActualSize];
#define NS_FREE_CHAR_BUF(aBuf) \
if (aBuf != _ns_smallBuffer) \
delete[] aBuf;
#define NS_ALLOC_STR_BUF(aBuf, aStrName, aTempSize) \
NS_ALLOC_CHAR_BUF(aBuf, aTempSize, aStrName.Length()+1); \
aStrName.ToCString(aBuf, aStrName.Length()+1);
#define NS_FREE_STR_BUF(aBuf) \
NS_FREE_CHAR_BUF(aBuf)
#endif // NSStringUtil