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Unicode string width functions
From: |
Bruno Haible |
Subject: |
Unicode string width functions |
Date: |
Sat, 7 Jul 2007 18:58:42 +0200 |
User-agent: |
KMail/1.5.4 |
The fifth part of the Unicode string library: functions for determining the
display width of Unicode characters and strings (assuming non-proportional
fonts).
Like wcwidth, this can never be perfect, because terminal emulators don't
behave exactly the same way. But it should be good enough for many languages
and xterm.
2007-07-07 Bruno Haible <address@hidden>
* MODULES.html.sh (Unicode string functions): Add the new modules.
* tests/uniwidth/test-u32-strwidth.c: New file.
* modules/uniwidth/u32-strwidth-tests: New file.
* lib/uniwidth/u32-strwidth.c: New file.
* modules/uniwidth/u32-strwidth: New file.
* tests/uniwidth/test-u16-strwidth.c: New file.
* modules/uniwidth/u16-strwidth-tests: New file.
* lib/uniwidth/u16-strwidth.c: New file.
* modules/uniwidth/u16-strwidth: New file.
* tests/uniwidth/test-u8-strwidth.c: New file.
* modules/uniwidth/u8-strwidth-tests: New file.
* lib/uniwidth/u8-strwidth.c: New file.
* modules/uniwidth/u8-strwidth: New file.
* tests/uniwidth/test-u32-width.c: New file.
* modules/uniwidth/u32-width-tests: New file.
* lib/uniwidth/u32-width.c: New file.
* modules/uniwidth/u32-width: New file.
* tests/uniwidth/test-u16-width.c: New file.
* modules/uniwidth/u16-width-tests: New file.
* lib/uniwidth/u16-width.c: New file.
* modules/uniwidth/u16-width: New file.
* tests/uniwidth/test-u8-width.c: New file.
* modules/uniwidth/u8-width-tests: New file.
* lib/uniwidth/u8-width.c: New file.
* modules/uniwidth/u8-width: New file.
* tests/uniwidth/test-uc_width.c: New file.
* modules/uniwidth/width-tests: New file.
* lib/uniwidth/width.c: New file, from GNU libiconv.
* lib/uniwidth/cjk.h: New file, from GNU libiconv.
* modules/uniwidth/width: New file.
* lib/uniwidth.h: New file, from GNU libiconv.
* modules/uniwidth/base: New file.
============================= lib/uniwidth.h ==============================
/* Display width functions.
Copyright (C) 2001-2002, 2005, 2007 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published
by the Free Software Foundation; either version 2, 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
USA. */
#ifndef _UNIWIDTH_H
#define _UNIWIDTH_H
#include "unitypes.h"
/* Get size_t. */
#include <stddef.h>
/* Get locale_charset() declaration. */
#include "localcharset.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Display width. */
/* These functions are locale dependent. The encoding argument identifies
the encoding (e.g. "ISO-8859-2" for Polish). */
/* Determine number of column positions required for UC. */
extern int
uc_width (ucs4_t uc, const char *encoding);
/* Determine number of column positions required for first N units
(or fewer if S ends before this) in S. */
extern int
u8_width (const uint8_t *s, size_t n, const char *encoding);
extern int
u16_width (const uint16_t *s, size_t n, const char *encoding);
extern int
u32_width (const uint32_t *s, size_t n, const char *encoding);
/* Determine number of column positions required for S. */
extern int
u8_strwidth (const uint8_t *s, const char *encoding);
extern int
u16_strwidth (const uint16_t *s, const char *encoding);
extern int
u32_strwidth (const uint32_t *s, const char *encoding);
#ifdef __cplusplus
}
#endif
#endif /* _UNIWIDTH_H */
==============================================================================
- Unicode string width functions,
Bruno Haible <=