From 64f2f6b907e40fa48ab1287ae60a800df7df3213 Mon Sep 17 00:00:00 2001 From: "John Ankarstr\\xf6m" Date: Tue, 1 Jun 2021 03:05:17 +0200 Subject: First commit (0.8) --- strlcpy.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 strlcpy.c (limited to 'strlcpy.c') diff --git a/strlcpy.c b/strlcpy.c new file mode 100644 index 0000000..0ec2b78 --- /dev/null +++ b/strlcpy.c @@ -0,0 +1,50 @@ +/* + * Copyright (c) 1998, 2015 Todd C. Miller + * + * 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 +#include + +#include "util.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 *dst, const char *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 */ +} -- cgit v1.2.3