| /*------------------------------------------------------------------------- |
| * |
| * strlcpy.c |
| * strncpy done right |
| * |
| * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group |
| * |
| * |
| * IDENTIFICATION |
| * $PostgreSQL: pgsql/src/port/strlcpy.c,v 1.6 2009/01/01 17:24:04 momjian Exp $ |
| * |
| * This file was taken from OpenBSD and is used on platforms that don't |
| * provide strlcpy(). The OpenBSD copyright terms follow. |
| *------------------------------------------------------------------------- |
| */ |
| |
| /* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */ |
| |
| /* |
| * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> |
| * |
| * Permission to use, copy, modify, and distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #include "c.h" |
| |
| #ifndef HAVE_STRLCPY |
| |
| /* |
| * Copy src to string dst of size siz. At most siz-1 characters |
| * will be copied. Always NUL terminates (unless siz == 0). |
| * Returns strlen(src); if retval >= siz, truncation occurred. |
| * Function creation history: http://www.gratisoft.us/todd/papers/strlcpy.html |
| */ |
| size_t |
| strlcpy(char *dst, const char *src, size_t siz) |
| { |
| char *d = dst; |
| const char *s = src; |
| size_t n = siz; |
| |
| /* Copy as many bytes as will fit */ |
| if (n != 0) |
| { |
| while (--n != 0) |
| { |
| if ((*d++ = *s++) == '\0') |
| break; |
| } |
| } |
| |
| /* Not enough room in dst, add NUL and traverse rest of src */ |
| if (n == 0) |
| { |
| if (siz != 0) |
| *d = '\0'; /* NUL-terminate dst */ |
| while (*s++) |
| ; |
| } |
| |
| return (s - src - 1); /* count does not include NUL */ |
| } |
| |
| #endif |