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wxWidgets/include/wx/chartype.h
Václav Slavík 93928d517b wchar_t is now always required, updated chartype.h check accordingly 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53238 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2008-04-16 22:20:50 +00:00

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C
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/*
* Name: wx/chartype.h
* Purpose: Declarations of wxChar and related types
* Author: Joel Farley, Ove Kåven
* Modified by: Vadim Zeitlin, Robert Roebling, Ron Lee
* Created: 1998/06/12
* RCS-ID: $Id$
* Copyright: (c) 1998-2006 wxWidgets dev team
* Licence: wxWindows licence
*/
/* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */
#ifndef _WX_WXCHARTYPE_H_
#define _WX_WXCHARTYPE_H_
/* defs.h indirectly includes this file, so don't include it here */
#include "wx/platform.h"
/* check whether we have wchar_t and which size it is if we do */
#if !defined(wxUSE_WCHAR_T)
#if defined(__UNIX__)
#if defined(HAVE_WCSTR_H) || defined(HAVE_WCHAR_H) || defined(__FreeBSD__) || defined(__DARWIN__)
#define wxUSE_WCHAR_T 1
#else
#define wxUSE_WCHAR_T 0
#endif
#elif defined(__GNUWIN32__) && !defined(__MINGW32__)
#define wxUSE_WCHAR_T 0
#elif defined(__WATCOMC__)
#define wxUSE_WCHAR_T 0
#elif defined(__VISAGECPP__) && (__IBMCPP__ < 400)
#define wxUSE_WCHAR_T 0
#else
/* add additional compiler checks if this fails */
#define wxUSE_WCHAR_T 1
#endif
#endif /* !defined(wxUSE_WCHAR_T) */
/* Unicode support requires wchar_t */
#if !wxUSE_WCHAR_T
#error "wchar_t must be available"
#endif /* Unicode */
/*
non Unix compilers which do have wchar.h (but not tchar.h which is included
below and which includes wchar.h anyhow).
Actually MinGW has tchar.h, but it does not include wchar.h
*/
#if defined(__MWERKS__) || defined(__VISAGECPP__) || defined(__MINGW32__) || defined(__WATCOMC__)
#ifndef HAVE_WCHAR_H
#define HAVE_WCHAR_H
#endif
#endif
#if defined(__MWERKS__) && !defined(__MACH__)
#ifndef HAVE_WCSLEN
#define HAVE_WCSLEN
#endif
#endif
#if wxUSE_WCHAR_T
#ifdef HAVE_WCHAR_H
/* the current (as of Nov 2002) version of cygwin has a bug in its */
/* wchar.h -- there is no extern "C" around the declarations in it */
/* and this results in linking errors later; also, at least on some */
/* Cygwin versions, wchar.h requires sys/types.h */
#ifdef __CYGWIN__
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
#endif /* Cygwin */
#include <wchar.h>
#if defined(__CYGWIN__) && defined(__cplusplus)
}
#endif /* Cygwin and C++ */
#elif defined(HAVE_WCSTR_H)
/* old compilers have relevant declarations here */
#include <wcstr.h>
#elif defined(__FreeBSD__) || defined(__DARWIN__) || defined(__EMX__)
/* include stdlib.h for wchar_t */
#include <stdlib.h>
#endif /* HAVE_WCHAR_H */
#ifdef HAVE_WIDEC_H
#include <widec.h>
#endif
#endif /* wxUSE_WCHAR_T */
/* -------------------------------------------------------------------------- */
/* define wxHAVE_TCHAR_SUPPORT for the compilers which support the TCHAR type */
/* mapped to either char or wchar_t depending on the ASCII/Unicode mode and */
/* have the function mapping _tfoo() -> foo() or wfoo() */
/* -------------------------------------------------------------------------- */
/* VC++ and BC++ starting with 5.2 have TCHAR support */
#ifdef __VISUALC__
#define wxHAVE_TCHAR_SUPPORT
#elif defined(__BORLANDC__) && (__BORLANDC__ >= 0x520)
#define wxHAVE_TCHAR_SUPPORT
#include <ctype.h>
#elif defined(__WATCOMC__)
#define wxHAVE_TCHAR_SUPPORT
#elif defined(__DMC__)
#define wxHAVE_TCHAR_SUPPORT
#elif defined(__WXPALMOS__)
#include <stddef.h>
#elif defined(__MINGW32__) && wxCHECK_W32API_VERSION( 1, 0 )
#define wxHAVE_TCHAR_SUPPORT
#include <stddef.h>
#include <string.h>
#include <ctype.h>
#elif 0 && defined(__VISAGECPP__) && (__IBMCPP__ >= 400)
/* VZ: the old VisualAge definitions were completely wrong and had no */
/* chance at all to work in Unicode build anyhow so let's pretend */
/* that VisualAge does _not_ support TCHAR for the moment (as */
/* indicated by "0 &&" above) until someone really has time to delve */
/* into Unicode issues under OS/2 */
/* VisualAge 4.0+ supports TCHAR */
#define wxHAVE_TCHAR_SUPPORT
#endif /* compilers with (good) TCHAR support */
#ifdef wxHAVE_TCHAR_SUPPORT
/* get TCHAR definition if we've got it */
#include <tchar.h>
/* we surely do have wchar_t if we have TCHAR */
#ifndef wxUSE_WCHAR_T
#define wxUSE_WCHAR_T 1
#endif /* !defined(wxUSE_WCHAR_T) */
#endif /* wxHAVE_TCHAR_SUPPORT */
/* ------------------------------------------------------------------------- */
/* define wxChar type */
/* ------------------------------------------------------------------------- */
/* TODO: define wxCharInt to be equal to either int or wint_t? */
#if !wxUSE_UNICODE
typedef char wxChar;
typedef signed char wxSChar;
typedef unsigned char wxUChar;
#else /* Unicode */
/* VZ: note that VC++ defines _T[SU]CHAR simply as wchar_t and not as */
/* signed/unsigned version of it which (a) makes sense to me (unlike */
/* char wchar_t is always unsigned) and (b) was how the previous */
/* definitions worked so keep it like this */
/* Sun's SunPro compiler supports the wchar_t type and wide character */
/* functions, but does not define __WCHAR_TYPE__. Define it here to */
/* allow unicode enabled builds. */
#if (defined(__SUNPRO_CC) || defined(__SUNPRO_C)) && !defined(__WCHAR_TYPE__)
#define __WCHAR_TYPE__ wxchar_t
#endif
/* GNU libc has __WCHAR_TYPE__ which requires special treatment, see */
/* comment below */
#if !defined(__WCHAR_TYPE__) || \
(!defined(__GNUC__) || wxCHECK_GCC_VERSION(2, 96))
/* standard case */
typedef wchar_t wxChar;
typedef wchar_t wxSChar;
typedef wchar_t wxUChar;
#else /* __WCHAR_TYPE__ and gcc < 2.96 */
/* VS: wxWidgets used to define wxChar as __WCHAR_TYPE__ here. */
/* However, this doesn't work with new GCC 3.x compilers because */
/* wchar_t is C++'s builtin type in the new standard. OTOH, old */
/* compilers (GCC 2.x) won't accept new definition of */
/* wx{S,U}CharType, so we have to define wxChar */
/* conditionally depending on detected compiler & compiler */
/* version. */
/* with old definition of wxChar. */
#define wchar_t __WCHAR_TYPE__
typedef __WCHAR_TYPE__ wxChar;
typedef __WCHAR_TYPE__ wxSChar;
typedef __WCHAR_TYPE__ wxUChar;
#endif /* __WCHAR_TYPE__ */
#endif /* ASCII/Unicode */
/* ------------------------------------------------------------------------- */
/* define wxStringCharType */
/* ------------------------------------------------------------------------- */
/* depending on the platform, Unicode build can either store wxStrings as
wchar_t* or UTF-8 encoded char*: */
#if wxUSE_UNICODE
/* FIXME-UTF8: what would be better place for this? */
#if defined(wxUSE_UTF8_LOCALE_ONLY) && !defined(wxUSE_UNICODE_UTF8)
#error "wxUSE_UTF8_LOCALE_ONLY only makes sense with wxUSE_UNICODE_UTF8"
#endif
#ifndef wxUSE_UTF8_LOCALE_ONLY
#define wxUSE_UTF8_LOCALE_ONLY 0
#endif
#ifndef wxUSE_UNICODE_UTF8
#define wxUSE_UNICODE_UTF8 0
#endif
#if wxUSE_UNICODE_UTF8
#define wxUSE_UNICODE_WCHAR 0
#else
#define wxUSE_UNICODE_WCHAR 1
#endif
#else
#define wxUSE_UNICODE_WCHAR 0
#define wxUSE_UNICODE_UTF8 0
#define wxUSE_UTF8_LOCALE_ONLY 0
#endif
/* define char type used by wxString internal representation: */
#if wxUSE_UNICODE_WCHAR
typedef wchar_t wxStringCharType;
#else /* wxUSE_UNICODE_UTF8 || ANSI */
typedef char wxStringCharType;
#endif
/* ------------------------------------------------------------------------- */
/* define _T() and related macros */
/* ------------------------------------------------------------------------- */
/* BSD systems define _T() to be something different in ctype.h, override it */
#if defined(__FreeBSD__) || defined(__DARWIN__)
#include <ctype.h>
#undef _T
#endif
/* could already be defined by tchar.h (it's quasi standard) */
#ifndef _T
#if !wxUSE_UNICODE
#define _T(x) x
#else /* Unicode */
/* use wxCONCAT_HELPER so that x could be expanded if it's a macro */
#define _T(x) wxCONCAT_HELPER(L, x)
#endif /* ASCII/Unicode */
#endif /* !defined(_T) */
/*
wxS ("wx string") macro can be used to create literals using the same
representation as wxString does internally, i.e. wchar_t in Unicode build
under Windows or char in UTF-8-based Unicode builds and (deprecated) ANSI
builds everywhere (see wxStringCharType definition above).
*/
#if wxUSE_UNICODE_WCHAR
#define wxS(x) wxCONCAT_HELPER(L, x)
#else /* wxUSE_UNICODE_UTF8 || ANSI */
#define wxS(x) x
#endif
/* although global macros with such names are normally bad, we want to have */
/* another name for _T() which should be used to avoid confusion between */
/* _T() and _() in wxWidgets sources */
#define wxT(x) _T(x)
/* a helper macro allowing to make another macro Unicode-friendly, see below */
#define wxAPPLY_T(x) _T(x)
/* Unicode-friendly __FILE__, __DATE__ and __TIME__ analogs */
#ifndef __TFILE__
#define __TFILE__ wxAPPLY_T(__FILE__)
#endif
#ifndef __TDATE__
#define __TDATE__ wxAPPLY_T(__DATE__)
#endif
#ifndef __TTIME__
#define __TTIME__ wxAPPLY_T(__TIME__)
#endif
#endif /* _WX_WXCHARTYPE_H_ */
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