Ruby
2.0.0p247(2013-06-27revision41674)
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00001 /* $OpenBSD: strlcat.c,v 1.8 2001/05/13 15:40:15 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: strlcat.c,v 1.8 2001/05/13 15:40:15 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 * Appends src to string dst of size siz (unlike strncat, siz is the 00040 * full size of dst, not space left). At most siz-1 characters 00041 * will be copied. Always NUL terminates (unless siz <= strlen(dst)). 00042 * Returns strlen(src) + MIN(siz, strlen(initial dst)). 00043 * If retval >= siz, truncation occurred. 00044 */ 00045 size_t 00046 strlcat(dst, src, siz) 00047 char *dst; 00048 const char *src; 00049 size_t siz; 00050 { 00051 register char *d = dst; 00052 register const char *s = src; 00053 register size_t n = siz; 00054 size_t dlen; 00055 00056 /* Find the end of dst and adjust bytes left but don't go past end */ 00057 while (n-- != 0 && *d != '\0') 00058 d++; 00059 dlen = d - dst; 00060 n = siz - dlen; 00061 00062 if (n == 0) 00063 return(dlen + strlen(s)); 00064 while (*s != '\0') { 00065 if (n != 1) { 00066 *d++ = *s; 00067 n--; 00068 } 00069 s++; 00070 } 00071 *d = '\0'; 00072 00073 return(dlen + (s - src)); /* count does not include NUL */ 00074 } 00075