usr/src/lib/libast/common/string/strlook.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  * Glenn Fowler
  25  * AT&T Research
  26  */
  27
  28 #include <ast.h>
  29
  30 /*
  31  * return pointer to name in tab with element size siz
  32  * where the first member of each element is a char*
  33  *
  34  * the last name in tab must be 0
  35  *
  36  * 0 returned if name not found
  37  */
  38
  39 void*
  40 strlook(const void* tab, size_t siz, register const char* name)
  41 {
  42         register char*  t = (char*)tab;
  43         register char*  s;
  44         register int    c = *name;
  45
  46         for (; s = *((char**)t); t += siz)
  47                 if (*s == c && !strcmp(s, name))
  48                         return (void*)t;
  49         return 0;
  50 }