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strlcpy.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*                  Copyright (c) 1985-2006 AT&T Corp.                  *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                            by AT&T Corp.                             *
*                                                                      *
*                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

#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:hide strlcpy
#else
#define strlcpy         ______strlcpy
#endif

#include <ast.h>

#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:nohide strlcpy
#else
#undef      strlcpy
#endif

/*
 * copy at most n chars from t into s
 * result 0 terminated if n>0
 * strlen(t) returned
 */

#if defined(__EXPORT__)
#define extern    __EXPORT__
#endif

extern size_t
strlcpy(register char* s, register const char* t, register size_t n)
{
      const char* o = t;

      if (n)
            do
            {
                  if (!--n)
                  {
                        *s = 0;
                        break;
                  }
            } while (*s++ = *t++);
      if (!n)
            while (*t++);
      return t - o - 1;
}

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