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jsstddef.h
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00001 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
00002  *
00003  * ***** BEGIN LICENSE BLOCK *****
00004  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00005  *
00006  * The contents of this file are subject to the Mozilla Public License Version
00007  * 1.1 (the "License"); you may not use this file except in compliance with
00008  * the License. You may obtain a copy of the License at
00009  * http://www.mozilla.org/MPL/
00010  *
00011  * Software distributed under the License is distributed on an "AS IS" basis,
00012  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00013  * for the specific language governing rights and limitations under the
00014  * License.
00015  *
00016  * The Original Code is Mozilla Communicator client code, released
00017  * March 31, 1998.
00018  *
00019  * The Initial Developer of the Original Code is
00020  * Netscape Communications Corporation.
00021  * Portions created by the Initial Developer are Copyright (C) 1998
00022  * the Initial Developer. All Rights Reserved.
00023  *
00024  * Contributor(s):
00025  *
00026  * Alternatively, the contents of this file may be used under the terms of
00027  * either of the GNU General Public License Version 2 or later (the "GPL"),
00028  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00029  * in which case the provisions of the GPL or the LGPL are applicable instead
00030  * of those above. If you wish to allow use of your version of this file only
00031  * under the terms of either the GPL or the LGPL, and not to allow others to
00032  * use your version of this file under the terms of the MPL, indicate your
00033  * decision by deleting the provisions above and replace them with the notice
00034  * and other provisions required by the GPL or the LGPL. If you do not delete
00035  * the provisions above, a recipient may use your version of this file under
00036  * the terms of any one of the MPL, the GPL or the LGPL.
00037  *
00038  * ***** END LICENSE BLOCK ***** */
00039 
00040 /*
00041  * stddef inclusion here to first declare ptrdif as a signed long instead of a
00042  * signed int.
00043  */
00044 
00045 #ifdef _WINDOWS
00046 # ifndef XP_WIN
00047 # define XP_WIN
00048 # endif
00049 #if defined(_WIN32) || defined(WIN32)
00050 # ifndef XP_WIN32
00051 # define XP_WIN32
00052 # endif
00053 #else
00054 # ifndef XP_WIN16
00055 # define XP_WIN16
00056 # endif
00057 #endif
00058 #endif
00059 
00060 #ifdef XP_WIN16
00061 #ifndef _PTRDIFF_T_DEFINED
00062 typedef long ptrdiff_t;
00063 
00064 /*
00065  * The Win16 compiler treats pointer differences as 16-bit signed values.
00066  * This macro allows us to treat them as 17-bit signed values, stored in
00067  * a 32-bit type.
00068  */
00069 #define PTRDIFF(p1, p2, type)                                 \
00070     ((((unsigned long)(p1)) - ((unsigned long)(p2))) / sizeof(type))
00071 
00072 #define _PTRDIFF_T_DEFINED
00073 #endif /*_PTRDIFF_T_DEFINED*/
00074 #else /*WIN16*/
00075 
00076 #define PTRDIFF(p1, p2, type)                                 \
00077         ((p1) - (p2))
00078 
00079 #endif
00080 
00081 #include <stddef.h>
00082 
00083