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openpam_strlset.c revision 1.1.1.3 
      1 /*-
      2  * Copyright (c) 2014 Dag-Erling Smrgrav
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. The name of the author may not be used to endorse or promote
     14  *    products derived from this software without specific prior written
     15  *    permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #ifdef HAVE_CONFIG_H
     31 # include "config.h"
     32 #endif
     33 
     34 #ifndef HAVE_STRLSET
     35 
     36 #include <stddef.h>
     37 
     38 #include "openpam_strlset.h"
     39 
     40 /*
     41  * like memset(3), but stops at the first NUL byte and NUL-terminates the
     42  * result.  Returns the number of bytes that were written, not including
     43  * the terminating NUL.
     44  */
     45 size_t
     46 openpam_strlset(char *str, int ch, size_t size)
     47 {
     48 	size_t len;
     49 
     50 	for (len = 0; *str && size > 1; ++len, --size)
     51 		*str++ = ch;
     52 	*str = '\0';
     53 	return (++len);
     54 }
     55 
     56 #endif
     57