xref: /onnv-gate/usr/src/lib/libast/common/string/strlcpy.c (revision 12068:08a39a083754)
14887Schin /***********************************************************************
24887Schin *                                                                      *
34887Schin *               This software is part of the ast package               *
4*12068SRoger.Faulkner@Oracle.COM *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
54887Schin *                      and is licensed under the                       *
64887Schin *                  Common Public License, Version 1.0                  *
78462SApril.Chin@Sun.COM *                    by AT&T Intellectual Property                     *
84887Schin *                                                                      *
94887Schin *                A copy of the License is available at                 *
104887Schin *            http://www.opensource.org/licenses/cpl1.0.txt             *
114887Schin *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
124887Schin *                                                                      *
134887Schin *              Information and Software Systems Research               *
144887Schin *                            AT&T Research                             *
154887Schin *                           Florham Park NJ                            *
164887Schin *                                                                      *
174887Schin *                 Glenn Fowler <gsf@research.att.com>                  *
184887Schin *                  David Korn <dgk@research.att.com>                   *
194887Schin *                   Phong Vo <kpv@research.att.com>                    *
204887Schin *                                                                      *
214887Schin ***********************************************************************/
224887Schin #pragma prototyped
234887Schin /*
244887Schin  * strlcpy implementation
254887Schin  */
264887Schin 
274887Schin #define strlcpy		______strlcpy
284887Schin 
294887Schin #include <ast.h>
304887Schin 
314887Schin #undef	strlcpy
324887Schin 
334887Schin #undef	_def_map_ast
344887Schin #include <ast_map.h>
354887Schin 
364887Schin #if _lib_strlcpy
374887Schin 
384887Schin NoN(strlcpy)
394887Schin 
404887Schin #else
414887Schin 
424887Schin /*
434887Schin  * copy at most n chars from t into s
444887Schin  * result 0 terminated if n>0
454887Schin  * strlen(t) returned
464887Schin  */
474887Schin 
484887Schin #if defined(__EXPORT__)
494887Schin #define extern	__EXPORT__
504887Schin #endif
514887Schin 
524887Schin extern size_t
534887Schin strlcpy(register char* s, register const char* t, register size_t n)
544887Schin {
554887Schin 	const char*	o = t;
564887Schin 
574887Schin 	if (n)
584887Schin 		do
594887Schin 		{
604887Schin 			if (!--n)
614887Schin 			{
624887Schin 				*s = 0;
634887Schin 				break;
644887Schin 			}
654887Schin 		} while (*s++ = *t++);
664887Schin 	if (!n)
674887Schin 		while (*t++);
684887Schin 	return t - o - 1;
694887Schin }
704887Schin 
714887Schin #endif
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