1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * %sccs.include.redist.c% 9 */ 10 11 #if defined(LIBC_SCCS) && !defined(lint) 12 static char sccsid[] = "@(#)strncat.c 5.5 (Berkeley) 05/17/90"; 13 #endif /* LIBC_SCCS and not lint */ 14 15 #include <sys/stdc.h> 16 #include <string.h> 17 18 /* 19 * Concatenate src on the end of dst. At most strlen(dst)+n+1 bytes 20 * are written at dst (at most n+1 bytes being appended). Return dst. 21 */ 22 char * 23 strncat(dst, src, n) 24 char *dst; 25 const char *src; 26 register size_t n; 27 { 28 if (n != 0) { 29 register char *d = dst; 30 register const char *s = src; 31 32 while (*d != 0) 33 d++; 34 do { 35 if ((*d = *s++) == 0) 36 break; 37 d++; 38 } while (--n != 0); 39 *d = 0; 40 } 41 return (dst); 42 } 43