From a482b5a5959240f5d196b32c4833ac48a03c02c3 Mon Sep 17 00:00:00 2001 From: Roland McGrath 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/wcsncat.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 wcsmbs/wcsncat.c (limited to 'wcsmbs/wcsncat.c') diff --git a/wcsmbs/wcsncat.c b/wcsmbs/wcsncat.c new file mode 100644 index 0000000000..7851d7048d --- /dev/null +++ b/wcsmbs/wcsncat.c @@ -0,0 +1,79 @@ +/* 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 + + +/* Append no more than N wide-character of SRC onto DEST. */ +wchar_t * +wcsncat (dest, src, n) + wchar_t *dest; + const wchar_t *src; + size_t n; +{ + wchar_t c; + wchar_t * const s = dest; + + /* Find the end of DEST. */ + do + c = *dest++; + while (c != L'\0'); + + /* Make DEST point before next character, so we can increment + it while memory is read (wins on pipelined cpus). */ + dest -= 2; + + if (n >= 4) + { + size_t n4 = n >> 2; + do + { + c = *src++; + *++dest = c; + if (c == L'\0') + return s; + c = *src++; + *++dest = c; + if (c == L'\0') + return s; + c = *src++; + *++dest = c; + if (c == L'\0') + return s; + c = *src++; + *++dest = c; + if (c == L'\0') + return s; + } while (--n4 > 0); + n &= 3; + } + + while (n > 0) + { + c = *src++; + *++dest = c; + if (c == L'\0') + return s; + n--; + } + + if (c != L'\0') + *++dest = L'\0'; + + return s; +} -- cgit v1.2.3