internat.subproj/NXIsAlpha.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright 1990, NeXT, Inc.
  24  */
  25
  26 #include "NXCType.h"
  27 #define FIXSIGNEDCHAR(i) if ((i & 0xFFFFFF80) == 0xFFFFFF80) i &= 0x000000FF
  28
  29
  30 int NXIsAlpha(c)
  31         unsigned int c;
  32 {
  33         FIXSIGNEDCHAR(c);
  34         if (c < 256)
  35                 return ((unsigned int)((_NX_CTypeTable_ + 1)[c] & (_U|_L)));
  36         return 0;
  37 }