usr/src/lib/libast/common/comp/getsubopt.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  * Xopen 4.2 compatibility
  25  */
  26
  27 #include <ast.h>
  28
  29 #undef  _lib_getsubopt  /* we can satisfy the api */
  30
  31 #if _lib_getsubopt
  32
  33 NoN(getsubopt)
  34
  35 #else
  36
  37 #undef  _BLD_ast        /* enable ast imports since we're user static */
  38
  39 #include <error.h>
  40
  41 extern int
  42 getsubopt(register char** op, char* const* tp, char** vp)
  43 {
  44         register char*  b;
  45         register char*  s;
  46         register char*  v;
  47
  48         if (*(b = *op))
  49         {
  50                 v = 0;
  51                 s = b;
  52                 for (;;)
  53                 {
  54                         switch (*s++)
  55                         {
  56                         case 0:
  57                                 s--;
  58                                 break;
  59                         case ',':
  60                                 *(s - 1) = 0;
  61                                 break;
  62                         case '=':
  63                                 if (!v)
  64                                 {
  65                                         *(s - 1) = 0;
  66                                         v = s;
  67                                 }
  68                                 continue;
  69                         default:
  70                                 continue;
  71                         }
  72                         break;
  73                 }
  74                 *op = s;
  75                 *vp = v;
  76                 for (op = (char**)tp; *op; op++)
  77                         if (streq(b, *op))
  78                                 return op - (char**)tp;
  79         }
  80         *vp = b;
  81         return -1;
  82 }
  83
  84 #endif