usr/src/lib/libast/common/string/stracmp.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #pragma prototyped
  23
  24 /*
  25  * ccmapchr(ccmap(CC_NATIVE,CC_ASCII),c) and strcmp
  26  */
  27
  28 #include <ast.h>
  29 #include <ccode.h>
  30
  31 #if _lib_stracmp
  32
  33 NoN(stracmp)
  34
  35 #else
  36
  37 #include <ctype.h>
  38
  39 int
  40 stracmp(const char* aa, const char* ab)
  41 {
  42         register unsigned char* a;
  43         register unsigned char* b;
  44         register unsigned char* m;
  45         register int            c;
  46         register int            d;
  47
  48         if (!(m = ccmap(CC_NATIVE, CC_ASCII)))
  49                 return strcmp(aa, ab);
  50         a = (unsigned char*)aa;
  51         b = (unsigned char*)ab;
  52         for (;;)
  53         {
  54                 c = m[*a++];
  55                 if (d = c - m[*b++])
  56                         return d;
  57                 if (!c)
  58                         return 0;
  59         }
  60 }
  61
  62 #endif