Ruby
2.0.0p247(2013-06-27revision41674)
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00001 /* $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $ */ 00002 00003 /* 00004 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 00005 * All rights reserved. 00006 * 00007 * Redistribution and use in source and binary forms, with or without 00008 * modification, are permitted provided that the following conditions 00009 * are met: 00010 * 1. Redistributions of source code must retain the above copyright 00011 * notice, this list of conditions and the following disclaimer. 00012 * 2. Redistributions in binary form must reproduce the above copyright 00013 * notice, this list of conditions and the following disclaimer in the 00014 * documentation and/or other materials provided with the distribution. 00015 * 3. The name of the author may not be used to endorse or promote products 00016 * derived from this software without specific prior written permission. 00017 * 00018 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 00019 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 00020 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 00021 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00022 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00023 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 00024 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 00025 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 00026 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 00027 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00028 */ 00029 00030 #if defined(LIBC_SCCS) && !defined(lint) 00031 static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $"; 00032 #endif /* LIBC_SCCS and not lint */ 00033 00034 #include "ruby/missing.h" 00035 #include <sys/types.h> 00036 #include <string.h> 00037 00038 /* 00039 * Copy src to string dst of size siz. At most siz-1 characters 00040 * will be copied. Always NUL terminates (unless siz == 0). 00041 * Returns strlen(src); if retval >= siz, truncation occurred. 00042 */ 00043 size_t 00044 strlcpy(dst, src, siz) 00045 char *dst; 00046 const char *src; 00047 size_t siz; 00048 { 00049 register char *d = dst; 00050 register const char *s = src; 00051 register size_t n = siz; 00052 00053 /* Copy as many bytes as will fit */ 00054 if (n != 0 && --n != 0) { 00055 do { 00056 if ((*d++ = *s++) == 0) 00057 break; 00058 } while (--n != 0); 00059 } 00060 00061 /* Not enough room in dst, add NUL and traverse rest of src */ 00062 if (n == 0) { 00063 if (siz != 0) 00064 *d = '\0'; /* NUL-terminate dst */ 00065 while (*s++) 00066 ; 00067 } 00068 00069 return(s - src - 1); /* count does not include NUL */ 00070 } 00071