GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/string/strncpy.c Lines: 8 8 100.0 %
Date: 2017-11-07 Branches: 6 8 75.0 %

Line Branch Exec Source
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/*	$OpenBSD: strncpy.c,v 1.8 2015/08/31 02:53:57 guenther Exp $	*/
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/*-
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 * Copyright (c) 1990 The Regents of the University of California.
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 * All rights reserved.
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 *
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 * This code is derived from software contributed to Berkeley by
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 * Chris Torek.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <string.h>
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/*
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 * Copy src to dst, truncating or null-padding to always copy n bytes.
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 * Return dst.
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 */
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char *
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strncpy(char *dst, const char *src, size_t n)
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{
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	if (n != 0) {
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		char *d = dst;
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		const char *s = src;
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		do {
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			if ((*d++ = *s++) == 0) {
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				/* NUL pad the remaining n-1 bytes */
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				while (--n != 0)
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					*d++ = 0;
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				break;
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			}
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		} while (--n != 0);
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	}
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	return (dst);
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}
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DEF_STRONG(strncpy);