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rlocale.h
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rlocale.h
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/*
* R : A Computer Language for Statistical Data Analysis
* Copyright (C) 2005-12 The R Core Team
*
* 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, a copy is available at
* http://www.r-project.org/Licenses/
*/
/* This file was contributed by Ei-ji Nakama.
* See also the comments in src/main/rlocale.c.
* It does 2 things:
* (a) supplies wrapper/substitute wc[s]width functions for use in
* character.c, errors.c, printutils.c, devPS.c, RGui console.
* (b) Defines a replacment for iswctype to be used on Windows, OS X and AIX.
* in gram.c
*/
#ifndef R_LOCALE_H
#define R_LOCALE_H
#ifndef NO_C_HEADERS
#include <wchar.h>
#include <ctype.h>
#include <wctype.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* Windows CJK
* In Unicode, there is not a rule about character width.
* A letter of breadth is used in a CJK (China, Japan, Korea,
* Taiwan, Hong Kong, and Singapore) area, and there are a
* letter and a standard (character width is not still prescribed)
* of a cord in a country.
* Letter width is a problem of a font, but it is a rule route
* besides a alphanumeric character that use a breadth letter.
* It is generally defined as a breadth letter for a font such
* as Japanese.
* - Win32
* Attempted explanation by BDR
* The display widths of characters are not prescribed in Unicode.
* Double-width characters are used in the CJK area: their width can
* be font-specific, with different fonts in use in different parts
* of the CJK area. The tables supplied in many OSes and by Marcus
* Kuhn are not do not take the exact locale into account. The
* tables supplied in rlocale_data.h allow different widths for
* different parts of the CJK area, and also where needed different
* widths on Windows. (The Windows differences are in zh_CN, and
* apply to European characters.)
*
*/
extern int Ri18n_wcwidth(wchar_t);
extern int Ri18n_wcswidth (const wchar_t *, size_t);
/* Mac OSX CJK and WindowXP(Japanese)
* iswctypes of MacOSX calls isctypes. no i18n.
* For example, iswprint of Windows does not accept a macron of
* Japanese "a-ru" of R as a letter.
* Therefore Japanese "Buraian.Ripuri-" of "Brian Ripley" is
* shown of hex-string.:-)
* We define alternatives to be used if
* defined(Win32) || defined(__APPLE_CC__) || defined(_AIX)
*/
extern wctype_t Ri18n_wctype(const char *);
extern int Ri18n_iswctype(wint_t, wctype_t);
#ifndef IN_RLOCALE_C
/* We want to avoid these redefinitions in rlocale.c itself */
#undef iswupper
#undef iswlower
#undef iswalpha
#undef iswdigit
#undef iswxdigit
#undef iswspace
#undef iswprint
#undef iswgraph
#undef iswblank
#undef iswcntrl
#undef iswpunct
#undef iswalnum
#undef wctype
#undef iswctype
#define iswupper(__x) Ri18n_iswctype(__x, Ri18n_wctype("upper"))
#define iswlower(__x) Ri18n_iswctype(__x, Ri18n_wctype("lower"))
#define iswalpha(__x) Ri18n_iswctype(__x, Ri18n_wctype("alpha"))
#define iswdigit(__x) Ri18n_iswctype(__x, Ri18n_wctype("digit"))
#define iswxdigit(__x) Ri18n_iswctype(__x, Ri18n_wctype("xdigit"))
#define iswspace(__x) Ri18n_iswctype(__x, Ri18n_wctype("space"))
#define iswprint(__x) Ri18n_iswctype(__x, Ri18n_wctype("print"))
#define iswgraph(__x) Ri18n_iswctype(__x, Ri18n_wctype("graph"))
#define iswblank(__x) Ri18n_iswctype(__x, Ri18n_wctype("blank"))
#define iswcntrl(__x) Ri18n_iswctype(__x, Ri18n_wctype("cntrl"))
#define iswpunct(__x) Ri18n_iswctype(__x, Ri18n_wctype("punct"))
#define iswalnum(__x) Ri18n_iswctype(__x, Ri18n_wctype("alnum"))
#define wctype(__x) Ri18n_wctype(__x)
#define iswctype(__x,__y) Ri18n_iswctype(__x,__y)
#endif
#ifdef __cplusplus
}
#endif
#endif /* R_LOCALE_H */