| 1 | /*␊ |
| 2 | * strlcpy.c␊ |
| 3 | */␊ |
| 4 | ␊ |
| 5 | /* Use OpenBSD heritage source -- Chucko 2014-01-06 */␊ |
| 6 | ␊ |
| 7 | /*-␊ |
| 8 | * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>␊ |
| 9 | *␊ |
| 10 | * Permission to use, copy, modify, and distribute this software for any␊ |
| 11 | * purpose with or without fee is hereby granted, provided that the above␊ |
| 12 | * copyright notice and this permission notice appear in all copies.␊ |
| 13 | *␊ |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES␊ |
| 15 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF␊ |
| 16 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR␊ |
| 17 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES␊ |
| 18 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN␊ |
| 19 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF␊ |
| 20 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.␊ |
| 21 | */␊ |
| 22 | ␊ |
| 23 | #include <string.h>␊ |
| 24 | #include <klibc/compiler.h>␊ |
| 25 | ␊ |
| 26 | /*␊ |
| 27 | * Copy src to string dst of size siz. At most siz-1 characters␊ |
| 28 | * will be copied. Always NUL terminates (unless siz == 0).␊ |
| 29 | * Returns strlen(src); if retval >= siz, truncation occurred.␊ |
| 30 | */␊ |
| 31 | size_t␊ |
| 32 | strlcpy(char * __restrict dst, const char * __restrict src, size_t siz)␊ |
| 33 | {␊ |
| 34 | char *d = dst;␊ |
| 35 | const char *s = src;␊ |
| 36 | size_t n = siz;␊ |
| 37 | ␊ |
| 38 | /* Copy as many bytes as will fit */␊ |
| 39 | if (n != 0) {␊ |
| 40 | while (--n != 0) {␊ |
| 41 | if ((*d++ = *s++) == '\0')␊ |
| 42 | break;␊ |
| 43 | }␊ |
| 44 | }␊ |
| 45 | ␊ |
| 46 | /* Not enough room in dst, add NUL and traverse rest of src */␊ |
| 47 | if (n == 0) {␊ |
| 48 | if (siz != 0)␊ |
| 49 | *d = '\0'; /* NUL-terminate dst */␊ |
| 50 | while (*s++)␊ |
| 51 | ;␊ |
| 52 | }␊ |
| 53 | ␊ |
| 54 | return(s - src - 1); /* count does not include NUL */␊ |
| 55 | }␊ |
| 56 | |
