1 /* 2 * This code is derived from OpenBSD's libc, original license follows: 3 * 4 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 #include <string.h> 21 22 #include "regex_impl.h" 23 /* 24 * Copy src to string dst of size siz. At most siz-1 characters 25 * will be copied. Always NUL terminates (unless siz == 0). 26 * Returns strlen(src); if retval >= siz, truncation occurred. 27 */ 28 size_t 29 llvm_strlcpy(char *dst, const char *src, size_t siz) 30 { 31 char *d = dst; 32 const char *s = src; 33 size_t n = siz; 34 35 /* Copy as many bytes as will fit */ 36 if (n != 0) { 37 while (--n != 0) { 38 if ((*d++ = *s++) == '\0') 39 break; 40 } 41 } 42 43 /* Not enough room in dst, add NUL and traverse rest of src */ 44 if (n == 0) { 45 if (siz != 0) 46 *d = '\0'; /* NUL-terminate dst */ 47 while (*s++) 48 ; 49 } 50 51 return(s - src - 1); /* count does not include NUL */ 52 } 53