usr/src/lib/libast/common/string/strmode.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  * G. S. Fowler
  25  * AT&T Bell Laboratories
  26  *
  27  * return modex canonical representation of file mode bits
  28  * given ls -l style file mode string
  29  */
  30
  31 #include "modelib.h"
  32
  33 int
  34 strmode(register const char* s)
  35 {
  36         register int            c;
  37         register char*          t;
  38         register struct modeop* p;
  39         int                     mode;
  40
  41         mode = 0;
  42         for (p = modetab; (c = *s++) && p < &modetab[MODELEN]; p++)
  43                 for (t = p->name; *t; t++)
  44                         if (*t == c)
  45                         {
  46                                 c = t - p->name;
  47                                 mode |= (p->mask1 & (c << p->shift1)) | (p->mask2 & (c << p->shift2));
  48                                 break;
  49                         }
  50         return(mode);
  51 }