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authorKurt Lidl <lidl@FreeBSD.org>2016-06-01 21:48:22 +0000
committerKurt Lidl <lidl@FreeBSD.org>2016-06-01 21:48:22 +0000
commitdf0cfa3b86180bc007aafedfac6685826e8de7ea (patch)
tree87b2b18820b6cc1642b930ba61c9228f4f3bb48b /port/strlcat.c
Notes
Diffstat (limited to 'port/strlcat.c')
-rw-r--r--port/strlcat.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/port/strlcat.c b/port/strlcat.c
new file mode 100644
index 000000000000..d3c69b5fab78
--- /dev/null
+++ b/port/strlcat.c
@@ -0,0 +1,96 @@
+/* $NetBSD: strlcat.c,v 1.2 2015/01/22 03:48:07 christos Exp $ */
+/* $OpenBSD: strlcat.c,v 1.10 2003/04/12 21:56:39 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 TODD C. MILLER DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER 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.
+ */
+
+#if !defined(_KERNEL) && !defined(_STANDALONE)
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+__RCSID("$NetBSD: strlcat.c,v 1.2 2015/01/22 03:48:07 christos Exp $");
+#endif /* LIBC_SCCS and not lint */
+
+#ifdef _LIBC
+#include "namespace.h"
+#endif
+#include <sys/types.h>
+#include <assert.h>
+#include <string.h>
+
+#ifdef _LIBC
+# ifdef __weak_alias
+__weak_alias(strlcat, _strlcat)
+# endif
+#endif
+
+#else
+#include <lib/libkern/libkern.h>
+#endif /* !_KERNEL && !_STANDALONE */
+
+#if !HAVE_STRLCAT
+/*
+ * Appends src to string dst of size siz (unlike strncat, siz is the
+ * full size of dst, not space left). At most siz-1 characters
+ * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
+ * Returns strlen(src) + MIN(siz, strlen(initial dst)).
+ * If retval >= siz, truncation occurred.
+ */
+size_t
+strlcat(char *dst, const char *src, size_t siz)
+{
+#if 1
+ char *d = dst;
+ const char *s = src;
+ size_t n = siz;
+ size_t dlen;
+
+ /* Find the end of dst and adjust bytes left but don't go past end */
+ while (n-- != 0 && *d != '\0')
+ d++;
+ dlen = d - dst;
+ n = siz - dlen;
+
+ if (n == 0)
+ return(dlen + strlen(s));
+ while (*s != '\0') {
+ if (n != 1) {
+ *d++ = *s;
+ n--;
+ }
+ s++;
+ }
+ *d = '\0';
+
+ return(dlen + (s - src)); /* count does not include NUL */
+#else
+
+ /*
+ * Find length of string in dst (maxing out at siz).
+ */
+ size_t dlen = strnlen(dst, siz);
+
+ /*
+ * Copy src into any remaining space in dst (truncating if needed).
+ * Note strlcpy(dst, src, 0) returns strlen(src).
+ */
+ return dlen + strlcpy(dst + dlen, src, siz - dlen);
+#endif
+}
+#endif