diff options
author | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2018-09-27 09:18:57 +0100 |
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committer | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2018-11-02 13:41:33 +0000 |
commit | b3e9214e96eb2a5a5eb94127037eecfee81d3509 (patch) | |
tree | aa9e54723d156a7dd835ddc8512111b8bb3b750f /lib/libc | |
parent | dd756c98953fa76ff000e97c6207111015c1c8c6 (diff) |
libc: Import strlcpy from FreeBSD
From commit aafd1cf4235d78ce85b76d7da63e9589039344b3:
- lib/libc/strlcpy.c
Change-Id: Iaa7028fcc26706bdd6ee3f1e4bd55dd5873a30c6
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Diffstat (limited to 'lib/libc')
-rw-r--r-- | lib/libc/strlcpy.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/lib/libc/strlcpy.c b/lib/libc/strlcpy.c new file mode 100644 index 00000000..019d2316 --- /dev/null +++ b/lib/libc/strlcpy.c @@ -0,0 +1,53 @@ +/* $OpenBSD: strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */ + +/* + * Copyright (c) 1998, 2015 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <string.h> + +/* + * Copy string src to buffer dst of size dsize. At most dsize-1 + * chars will be copied. Always NUL terminates (unless dsize == 0). + * Returns strlen(src); if retval >= dsize, truncation occurred. + */ +size_t +strlcpy(char * __restrict dst, const char * __restrict src, size_t dsize) +{ + const char *osrc = src; + size_t nleft = dsize; + + /* Copy as many bytes as will fit. */ + if (nleft != 0) { + while (--nleft != 0) { + if ((*dst++ = *src++) == '\0') + break; + } + } + + /* Not enough room in dst, add NUL and traverse rest of src. */ + if (nleft == 0) { + if (dsize != 0) + *dst = '\0'; /* NUL-terminate dst */ + while (*src++) + ; + } + + return(src - osrc - 1); /* count does not include NUL */ +} |