Initial revision

strlfun.c

@@ -0,0 +1,113 @@
+/**	$MirOS: src/bin/mksh/strlfun.c,v 1.1 2005/05/23 16:43:20 tg Exp $ */
+/*	$OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $ */
+/*	$OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $ */
+
+/*-
+ * Copyright (c) 2004, 2005 Thorsten "mirabile" Glaser <tg@66h.42h.de>
+ * Some hints for optimisation from Bodo Eggert (via d.a.s.r)
+ * 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.
+ */
+
+#if !defined(_KERNEL) && !defined(_STANDALONE)
+#ifdef HAVE_CONFIG_H
+/* usually when packaged with third-party software */
+#include "config.h"
+#define LIBC_SCCS
+#endif
+#include <sys/types.h>
+
+#ifndef __RCSID
+#define __RCSID(x)	static const char __rcsid[] = (x)
+#endif
+
+__RCSID("$MirOS: src/bin/mksh/strlfun.c,v 1.1 2005/05/23 16:43:20 tg Exp $");
+#else
+#include <lib/libkern/libkern.h>
+#undef HAVE_CONFIG_H
+#endif
+
+#ifndef HAVE_CONFIG_H
+#undef HAVE_STRLCPY
+#undef HAVE_STRLCAT
+#endif
+
+size_t strlcat(char *, const char *, size_t);
+size_t strlcpy(char *, const char *, size_t);
+
+#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.
+ */
+size_t
+strlcpy(char *dst, const char *src, size_t siz)
+{
+	const char *s = src;
+
+	if (!siz) goto traverse_src;
+
+	/* Copy as many bytes as will fit */
+	for (; --siz && (*dst++ = *s++); /* nothing */)
+		;
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (!siz) {
+		/* Save, since we've copied at max. (siz-1) characters */
+		*dst = '\0';	/* NUL-terminate dst */
+traverse_src:
+		while (*s++)
+			;
+	}
+
+	return (s - src - 1);	/* count does not include NUL */
+}
+#endif /* !HAVE_STRLCPY */
+
+#ifndef	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)
+{
+	char *d = dst;
+	size_t dl, n = siz;
+	const size_t sl = strlen(src);
+
+	while (n-- && (*d++ != '\0'))
+		;
+	if (!++n && (*d != '\0'))
+		return strlen(src);
+
+	dl = --d - dst;		/* original strlen(dst), max. siz-1 */
+	n = siz - dl;
+	dl += sl;
+
+	if (!n--)
+		return dl;
+
+	if (n > sl)
+		n = sl;		/* number of octets to copy */
+	for (; n-- && (*d++ = *src++); /* nothing */)
+		;
+	*d = '\0';		/* NUL-terminate dst */
+	return dl;
+}
+#endif /* !HAVE_STRLCAT */