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pathcat.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                      by AT&T Knowledge Ventures                      *
*                                                                      *
*                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
/*
 * Glenn Fowler
 * AT&T Bell Laboratories
 *
 * single dir support for pathaccess()
 */

#include <ast.h>

char*
pathcat(char* path, register const char* dirs, int sep, const char* a, register const char* b)
{
      register char*    s;

      s = path;
      while (*dirs && *dirs != sep)
            *s++ = *dirs++;
      if (s != path)
            *s++ = '/';
      if (a)
      {
            while (*s = *a++)
                  s++;
            if (b)
                  *s++ = '/';
      }
      else if (!b)
            b = ".";
      if (b)
            while (*s++ = *b++);
      return *dirs ? (char*)++dirs : 0;
}

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