usr/src/lib/libast/common/string/strpcmp.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 #include <ast.h>
  25
  26 /*
  27  * path prefix strcmp(3) -- longest first!
  28  */
  29
  30 int
  31 strpcmp(register const char* a, register const char* b)
  32 {
  33         while (*a == *b)
  34         {
  35                 if (!*a++)
  36                         return 0;
  37                 b++;
  38         }
  39         if (*a == 0 && *b == '/')
  40                 return 1;
  41         if (*a == '/' && *b == 0)
  42                 return -1;
  43         return (a < b) ? -1 : 1;
  44 }