/* Copyright (C) 1996-2016 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996. 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, see <http://www.gnu.org/licenses/>. */ #include "wcwidth.h" /* Determine number of column positions required for first N wide characters (or fewer if S ends before this) in S. */ int wcswidth (const wchar_t *s, size_t n) { int result = 0; while (n-- > 0 && *s != L'\0') { int now = internal_wcwidth (*s); if (now == -1) return -1; result += now; ++s; } return result; }