/* Copyright (C) 1995, 1996, 1997 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 Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <wchar.h> /* 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; }