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-rw-r--r--wcsmbs/wcpncpy.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/wcsmbs/wcpncpy.c b/wcsmbs/wcpncpy.c
new file mode 100644
index 0000000000..2ff7abff8f
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+++ b/wcsmbs/wcpncpy.c
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+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
+
+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., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <wchar.h>
+
+
+/* Copy no more than N wide-characters of SRC to DEST, returning the
+ address of the last character written into DEST. */
+wchar_t *
+__wcpncpy (dest, src, n)
+ wchar_t *dest;
+ const wchar_t *src;
+ size_t n;
+{
+ wint_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 dest;
+ goto zero_fill;
+ }
+
+ last_chars:
+ n &= 3;
+ if (n == 0)
+ return dest;
+
+ do
+ {
+ c = *src++;
+ *++dest = c;
+ if (--n == 0)
+ return dest;
+ }
+ while (c != L'\0');
+
+ zero_fill:
+ do
+ *++dest = L'\0';
+ while (--n > 0);
+
+ return dest;
+}
+
+weak_alias (__wcpncpy, wcpncpy)