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/***************************************************************************
* fqterm, a terminal emulator for both BBS and *nix. *
* Copyright (C) 2008 fqterm development group. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
#ifndef FQTERM_FQWCWIDTH_H
#define FQTERM_FQWCWIDTH_H
#include <cstdio>
#include <cstdint>
typedef uint16_t UTF16;
namespace FQTerm {
//const uint16_t URC = 0xfffd; // the Unicode Replacement Character
// TODO_UTF16: 0xfffd is of width 2, which is not desired.
const uint16_t URC = '?'; // use '?' instead of the Unicode Replacement Character
const int MAX_CELLS_PER_CHAR = 2;
int get_str_width(uint32_t ucs);
int get_str_width(const uint32_t *pwcs, size_t n);
int get_str_width(const UTF16 *utf16_str, size_t n);
int get_str_width(const UTF16 *utf16_str, size_t n, int max_width, int &element_consumed);
// Move p to next code point in max_n UTF16 characters.
// Return the width of the current code point.
int mk_advance_one_code_point(const UTF16 **p, const UTF16 *end);
// Move p to next code point in max_n UTF16 characters.
// Return the width.
int mk_advace_at_least_one_cell(const UTF16 **p, const UTF16 *end);
} // namespace FQTerm
#endif // FQTERM_FQWCWIDTH_H
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