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64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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/*
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* stddef inclusion here to first declare ptrdif as a signed long instead of a
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* signed int.
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*/
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#ifdef _WINDOWS
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# ifndef XP_WIN
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# define XP_WIN
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# endif
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#if defined(_WIN32) || defined(WIN32)
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# ifndef XP_WIN32
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# define XP_WIN32
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# endif
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#else
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# ifndef XP_WIN16
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# define XP_WIN16
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# endif
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#endif
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#endif
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#ifdef XP_WIN16
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#ifndef _PTRDIFF_T_DEFINED
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typedef long ptrdiff_t;
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/*
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* The Win16 compiler treats pointer differences as 16-bit signed values.
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* This macro allows us to treat them as 17-bit signed values, stored in
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* a 32-bit type.
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*/
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#define PTRDIFF(p1, p2, type) \
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((((unsigned long)(p1)) - ((unsigned long)(p2))) / sizeof(type))
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#define _PTRDIFF_T_DEFINED
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#endif /*_PTRDIFF_T_DEFINED*/
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#else /*WIN16*/
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#define PTRDIFF(p1, p2, type) \
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((p1) - (p2))
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#endif
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#include <stddef.h>
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