From a482b5a5959240f5d196b32c4833ac48a03c02c3 Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Thu, 8 Feb 1996 10:00:34 +0000
Subject: * Makefile (subdirs): Added wcsmbs.

	* wcsmbs: New directory of wide char/multibyte char functions from
	drepper.
---
 wcsmbs/wcsncpy.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 wcsmbs/wcsncpy.c

(limited to 'wcsmbs/wcsncpy.c')

diff --git a/wcsmbs/wcsncpy.c b/wcsmbs/wcsncpy.c
new file mode 100644
index 0000000000..740c71ecf8
--- /dev/null
+++ b/wcsmbs/wcsncpy.c
@@ -0,0 +1,85 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.	 If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <wcstr.h>
+
+
+/* Copy no more than N wide-characters of SRC to DEST.	*/
+wchar_t *
+wcsncpy (dest, src, n)
+      wchar_t *dest;
+      const wchar_t *src;
+      size_t n;
+{
+  wchar_t c;
+  wchar_t * const s = dest;
+
+  --dest;
+
+  if (n >= 4)
+    {
+      size_t n4 = n >> 2;
+
+      for (;;)
+	{
+	  c = *src++;
+	  *++dest = c;
+	  if (c == L'\0')
+	    break;
+	  c = *src++;
+	  *++dest = c;
+	  if (c == L'\0')
+	    break;
+	  c = *src++;
+	  *++dest = c;
+	  if (c == L'\0')
+	    break;
+	  c = *src++;
+	  *++dest = c;
+	  if (c == L'\0')
+	    break;
+	  if (--n4 == 0)
+	    goto last_chars;
+	}
+      n = n - (dest - s) - 1;
+      if (n == 0)
+	return s;
+      goto zero_fill;
+    }
+
+ last_chars:
+  n &= 3;
+  if (n == 0)
+    return s;
+
+  do
+    {
+      c = *src++;
+      *++dest = c;
+      if (--n == 0)
+	return s;
+    }
+  while (c != L'\0');
+
+ zero_fill:
+  do
+    *++dest = L'\0';
+  while (--n > 0);
+
+  return s;
+}
-- 
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