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sortix--sortix/libc/wchar/wcswidth.cpp
2014-11-18 18:10:23 +01:00

38 lines
1.3 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2014.
This file is part of the Sortix C Library.
The Sortix 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 3 of the License, or (at your
option) any later version.
The Sortix 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 Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
wchar/wcswidth.cpp
Number of column positions of a wide-character string.
*******************************************************************************/
#include <wchar.h>
extern "C" int wcswidth(const wchar_t* wcs, size_t n)
{
int result = 0;
for ( size_t i = 0; i < n && wcs[n]; i++ )
{
int columns = wcwidth(wcs[n]);
if ( columns < 0 )
return -1;
result += columns;
}
return result;
}