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strmode.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2008 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * G. S. Fowler
 * AT&T Bell Laboratories
 *
 * return modex canonical representation of file mode bits
 * given ls -l style file mode string
 */

#include "modelib.h"

int
strmode(register const char* s)
{
      register int            c;
      register char*          t;
      register struct modeop* p;
      int               mode;

      mode = 0;
      for (p = modetab; (c = *s++) && p < &modetab[MODELEN]; p++)
            for (t = p->name; *t; t++)
                  if (*t == c)
                  {
                        c = t - p->name;
                        mode |= (p->mask1 & (c << p->shift1)) | (p->mask2 & (c << p->shift2));
                        break;
                  }
      return(mode);
}

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