/* Test whether a character is a blank.

   Copyright (C) 2009-2019 Free Software Foundation, Inc.

   This program 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.

   This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */

#include <ctype.h>

int

isblank (int c)

{

  /* On all known platforms, in all predefined locales, isblank(c) is likely

     equivalent with  (c == ' ' || c == '\t').  Look at the glibc definition

     (in glibc/localedata/locales/i18n): The "blank" characters are '\t', ' ',

     U+1680, U+180E, U+2000..U+2006, U+2008..U+200A, U+205F, U+3000, and none

     except the first two is present in a common 8-bit encoding.  Therefore

     the substitute for other platforms is not more complicated than this.  */

  return (c == ' ' || c == '\t');

}