1185573Srwatson/*- 2162503Srwatson * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 3162503Srwatson * All rights reserved. 4162503Srwatson * 5162503Srwatson * Redistribution and use in source and binary forms, with or without 6162503Srwatson * modification, are permitted provided that the following conditions 7162503Srwatson * are met: 8162503Srwatson * 1. Redistributions of source code must retain the above copyright 9162503Srwatson * notice, this list of conditions and the following disclaimer. 10162503Srwatson * 2. Redistributions in binary form must reproduce the above copyright 11162503Srwatson * notice, this list of conditions and the following disclaimer in the 12162503Srwatson * documentation and/or other materials provided with the distribution. 13162503Srwatson * 3. The name of the author may not be used to endorse or promote products 14162503Srwatson * derived from this software without specific prior written permission. 15162503Srwatson * 16162503Srwatson * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 17162503Srwatson * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 18162503Srwatson * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 19162503Srwatson * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20162503Srwatson * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21162503Srwatson * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22162503Srwatson * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23162503Srwatson * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24162503Srwatson * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25162503Srwatson * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26162503Srwatson * 27162503Srwatson * dollar OpenBSD: strlcat.c,v 1.2 1999/06/17 16:28:58 millert Exp dollar 28162503Srwatson */ 29162503Srwatson 30162503Srwatson/* 31162503Srwatson * Appends src to string dst of size siz (unlike strncat, siz is the 32162503Srwatson * full size of dst, not space left). At most siz-1 characters 33162503Srwatson * will be copied. Always NUL terminates (unless siz <= strlen(dst)). 34162503Srwatson * Returns strlen(src) + MIN(siz, strlen(initial dst)). 35162503Srwatson * If retval >= siz, truncation occurred. 36162503Srwatson */ 37162503Srwatsonstatic size_t 38162503Srwatsonstrlcat(dst, src, siz) 39162503Srwatson char *dst; 40162503Srwatson const char *src; 41162503Srwatson size_t siz; 42162503Srwatson{ 43162503Srwatson char *d = dst; 44162503Srwatson const char *s = src; 45162503Srwatson size_t n = siz; 46162503Srwatson size_t dlen; 47162503Srwatson 48162503Srwatson /* Find the end of dst and adjust bytes left but don't go past end */ 49162503Srwatson while (n-- != 0 && *d != '\0') 50162503Srwatson d++; 51162503Srwatson dlen = d - dst; 52162503Srwatson n = siz - dlen; 53162503Srwatson 54162503Srwatson if (n == 0) 55162503Srwatson return(dlen + strlen(s)); 56162503Srwatson while (*s != '\0') { 57162503Srwatson if (n != 1) { 58162503Srwatson *d++ = *s; 59162503Srwatson n--; 60162503Srwatson } 61162503Srwatson s++; 62162503Srwatson } 63162503Srwatson *d = '\0'; 64162503Srwatson 65162503Srwatson return(dlen + (s - src)); /* count does not include NUL */ 66162503Srwatson} 67