uclibc-ng/libc/misc/wctype/wctype.c

/*  Copyright (C) 2002, 2003     Manuel Novoa III
 *
 *  This library 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 of the License, or (at your option) any later version.
 *
 *  This 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the Free
 *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*  ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!
 *
 *  Besides uClibc, I'm using this code in my libc for elks, which is
 *  a 16-bit environment with a fairly limited compiler.  It would make
 *  things much easier for me if this file isn't modified unnecessarily.
 *  In particular, please put any new or replacement functions somewhere
 *  else, and modify the makefile to use your version instead.
 *  Thanks.  Manuel
 *
 *  ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION! */

#define _GNU_SOURCE
#define __NO_CTYPE

#include <wctype.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <locale.h>
#include <ctype.h>
#include <stdint.h>
#include <bits/uClibc_uwchar.h>

#if defined(__LOCALE_C_ONLY) && defined(__UCLIBC_DO_XLOCALE)
#error xlocale functionality is not supported in stub locale mode.
#endif

#ifdef __UCLIBC_HAS_XLOCALE__
#include <xlocale.h>
#endif /* __UCLIBC_HAS_XLOCALE__ */

/* We know wide char support is enabled.  We wouldn't be here otherwise. */

/* Define this if you want to unify the towupper and towlower code in the
 * towctrans function. */
/* #define SMALL_UPLOW */

/**********************************************************************/
#ifdef __UCLIBC_MJN3_ONLY__
#ifdef L_iswspace
/* generates one warning */
#warning TODO: Fix the __CTYPE_* codes!
#endif
#endif /* __UCLIBC_MJN3_ONLY__ */

#if 1
/* Taking advantage of the C99 mutual-exclusion guarantees for the various
 * (w)ctype classes, including the descriptions of printing and control
 * (w)chars, we can place each in one of the following mutually-exlusive
 * subsets.  Since there are less than 16, we can store the data for
 * each (w)chars in a nibble. In contrast, glibc uses an unsigned int
 * per (w)char, with one bit flag for each is* type.  While this allows
 * a simple '&' operation to determine the type vs. a range test and a
 * little special handling for the "blank" and "xdigit" types in my
 * approach, it also uses 8 times the space for the tables on the typical
 * 32-bit archs we supported.*/
enum {
	__CTYPE_unclassified = 0,
	__CTYPE_alpha_nonupper_nonlower,
	__CTYPE_alpha_lower,
	__CTYPE_alpha_upper_lower,
	__CTYPE_alpha_upper,
	__CTYPE_digit,
	__CTYPE_punct,
	__CTYPE_graph,
	__CTYPE_print_space_nonblank,
	__CTYPE_print_space_blank,
	__CTYPE_space_nonblank_noncntrl,
	__CTYPE_space_blank_noncntrl,
	__CTYPE_cntrl_space_nonblank,
	__CTYPE_cntrl_space_blank,
	__CTYPE_cntrl_nonspace
};
#endif


/* The following is used to implement wctype(), but it is defined
 * here because the ordering must agree with that of the enumeration
 * below (ignoring unclassified). */
#define __CTYPE_TYPESTRING \
	"\6alnum\0\6alpha\0\6blank\0\6cntrl\0\6digit\0\6graph\0\6lower\0" \
	"\6print\0\6punct\0\6space\0\6upper\0\7xdigit\0\0"


/* The values for wctype_t. */
enum {
	_CTYPE_unclassified = 0,
	_CTYPE_isalnum,
	_CTYPE_isalpha,
	_CTYPE_isblank,
	_CTYPE_iscntrl,
	_CTYPE_isdigit,
	_CTYPE_isgraph,
	_CTYPE_islower,
	_CTYPE_isprint,
	_CTYPE_ispunct,
	_CTYPE_isspace,
	_CTYPE_isupper,
	_CTYPE_isxdigit				/* _MUST_ be last of the standard classes! */
};

/* The following is used to implement wctrans(). */

#define __CTYPE_TRANSTRING	"\10tolower\0\10toupper\0\10totitle\0\0"

enum {
	_CTYPE_tolower = 1,
	_CTYPE_toupper,
	_CTYPE_totitle
};

/*--------------------------------------------------------------------*/

#define _CTYPE_iswxdigit (_CTYPE_isxdigit)

/*--------------------------------------------------------------------*/

#ifdef __UCLIBC_MJN3_ONLY__
#ifdef L_iswspace
/* generates one warning */
#warning TODO: Fix WC* defines!
#endif
#endif /* __UCLIBC_MJN3_ONLY__ */

#define ENCODING		((__UCLIBC_CURLOCALE_DATA).encoding)

#define WCctype			((__UCLIBC_CURLOCALE_DATA).tblwctype)
#define WCuplow			((__UCLIBC_CURLOCALE_DATA).tblwuplow)
#define WCcmob			((__UCLIBC_CURLOCALE_DATA).tblwcomb)
#define WCuplow_diff	((__UCLIBC_CURLOCALE_DATA).tblwuplow_diff)


#define WC_TABLE_DOMAIN_MAX   __LOCALE_DATA_WC_TABLE_DOMAIN_MAX

#define WCctype_II_LEN        __LOCALE_DATA_WCctype_II_LEN
#define WCctype_TI_LEN        __LOCALE_DATA_WCctype_TI_LEN
#define WCctype_UT_LEN        __LOCALE_DATA_WCctype_UT_LEN
#define WCctype_II_SHIFT      __LOCALE_DATA_WCctype_II_SHIFT
#define WCctype_TI_SHIFT      __LOCALE_DATA_WCctype_TI_SHIFT

#define WCuplow_II_LEN        __LOCALE_DATA_WCuplow_II_LEN
#define WCuplow_TI_LEN        __LOCALE_DATA_WCuplow_TI_LEN
#define WCuplow_UT_LEN        __LOCALE_DATA_WCuplow_UT_LEN
#define WCuplow_II_SHIFT      __LOCALE_DATA_WCuplow_II_SHIFT
#define WCuplow_TI_SHIFT      __LOCALE_DATA_WCuplow_TI_SHIFT


#define WCctype_TI_MASK		((1 << (WCctype_TI_SHIFT)) - 1)
#define WCctype_II_MASK		((1 << (WCctype_II_SHIFT)) - 1)

/**********************************************************************/

#undef __PASTE2
#undef __PASTE3
#define __PASTE2(X,Y)		X ## Y
#define __PASTE3(X,Y,Z)		X ## Y ## Z

#ifdef __UCLIBC_DO_XLOCALE

extern int __iswctype_l (wint_t __wc, wctype_t __desc, __locale_t __locale)
     __THROW;

#define ISW_FUNC_BODY(NAME) \
int __PASTE3(__isw,NAME,_l) (wint_t wc, __locale_t l) \
{ \
	return __iswctype_l(wc, __PASTE2(_CTYPE_is,NAME), l); \
} \
weak_alias(__PASTE3(__isw,NAME,_l), __PASTE3(isw,NAME,_l))

#else  /* __UCLIBC_DO_XLOCALE */

extern int __iswctype (wint_t __wc, wctype_t __desc) __THROW;

#define ISW_FUNC_BODY(NAME) \
int __PASTE2(isw,NAME) (wint_t wc) \
{ \
	return __iswctype(wc, __PASTE2(_CTYPE_is,NAME)); \
}

#endif /* __UCLIBC_DO_XLOCALE */
/**********************************************************************/
#if defined(L_iswalnum) || defined(L_iswalnum_l)

ISW_FUNC_BODY(alnum);

#endif
/**********************************************************************/
#if defined(L_iswalpha) || defined(L_iswalpha_l)

ISW_FUNC_BODY(alpha);

#endif
/**********************************************************************/
#if defined(L_iswblank) || defined(L_iswblank_l)

ISW_FUNC_BODY(blank);

#endif
/**********************************************************************/
#if defined(L_iswcntrl) || defined(L_iswcntrl_l)

ISW_FUNC_BODY(cntrl);

#endif
/**********************************************************************/
#if defined(L_iswdigit) || defined(L_iswdigit_l)

ISW_FUNC_BODY(digit);

#endif
/**********************************************************************/
#if defined(L_iswgraph) || defined(L_iswgraph_l)

ISW_FUNC_BODY(graph);

#endif
/**********************************************************************/
#if defined(L_iswlower) || defined(L_iswlower_l)

ISW_FUNC_BODY(lower);

#endif
/**********************************************************************/
#if defined(L_iswprint) || defined(L_iswprint_l)

ISW_FUNC_BODY(print);

#endif
/**********************************************************************/
#if defined(L_iswpunct) || defined(L_iswpunct_l)

ISW_FUNC_BODY(punct);

#endif
/**********************************************************************/
#if defined(L_iswspace) || defined(L_iswspace_l)

ISW_FUNC_BODY(space);

#endif
/**********************************************************************/
#if defined(L_iswupper) || defined(L_iswupper_l)

ISW_FUNC_BODY(upper);

#endif
/**********************************************************************/
#if defined(L_iswxdigit) || defined(L_iswxdigit_l)

ISW_FUNC_BODY(xdigit);

#endif
/**********************************************************************/
#if defined(L_towlower) || defined(L_towlower_l)

#ifdef L_towlower
#define TOWLOWER(w) towlower(w)
#else  /* L_towlower */
#define TOWLOWER(w) __towlower_l(w, __locale_t locale)
#undef __UCLIBC_CURLOCALE_DATA
#undef __UCLIBC_CURLOCALE
#define __UCLIBC_CURLOCALE_DATA (*locale)
#define __UCLIBC_CURLOCALE (locale)
#endif /* L_towlower */

#ifdef __UCLIBC_HAS_XLOCALE__
#define TOWCTRANS(w,d) __towctrans_l(w,d, __UCLIBC_CURLOCALE)
#else  /* __UCLIBC_HAS_XLOCALE__ */
#define TOWCTRANS(w,d) towctrans(w,d)
#endif /* __UCLIBC_HAS_XLOCALE__ */

#define __C_towlower(wc) \
	((((__uwchar_t)(wc)) <= 0x7f) ? (__C_ctype_tolower)[(wc)] : (wc))

#ifdef __LOCALE_C_ONLY

wint_t towlower(wint_t wc)
{
#ifdef __UCLIBC_HAS_CTYPE_TABLES__
	return __C_towlower(wc);
#else
	return (wc == ((unsigned int)(wc)))
		? __C_tolower(((unsigned int)(wc)))
		: 0;
#endif
}

#else  /* __LOCALE_C_ONLY */

#ifdef SMALL_UPLOW

#if defined(L_towlower) && defined(__UCLIBC_HAS_XLOCALE__)

wint_t towlower(wint_t wc)
{
	return __towctrans_l(wc, _CTYPE_tolower, __UCLIBC_CURLOCALE);
}

#else  /* defined(L_towlower) && defined(__UCLIBC_HAS_XLOCALE__) */

wint_t TOWLOWER(wint_t wc)
{
	return TOWCTRANS(wc, _CTYPE_tolower);
}

#endif /* defined(L_towlower) && defined(__UCLIBC_HAS_XLOCALE__) */

#else  /* SMALL_UPLOW */

#if defined(L_towlower) && defined(__UCLIBC_HAS_XLOCALE__)

wint_t towlower(wint_t wc)
{
	return __towlower_l(wc, __UCLIBC_CURLOCALE);
}

#else  /* defined(L_towlower) && defined(__UCLIBC_HAS_XLOCALE__) */

wint_t TOWLOWER(wint_t wc)
{
	unsigned int sc, n, i;
	__uwchar_t u = wc;

	if (ENCODING == __ctype_encoding_7_bit) {
		/* We're in the C/POSIX locale, so ignore the tables. */
		return __C_towlower(wc);
	}

	if (u <= WC_TABLE_DOMAIN_MAX) {
		sc = u & ((1 << WCuplow_TI_SHIFT) - 1);
		u >>= WCuplow_TI_SHIFT;
		n = u & ((1 << WCuplow_II_SHIFT) - 1);
		u >>= WCuplow_II_SHIFT;

		i = ((unsigned int) WCuplow[u]) << WCuplow_II_SHIFT;
		i = ((unsigned int) WCuplow[WCuplow_II_LEN + i + n])
			<< WCuplow_TI_SHIFT;
		i = ((unsigned int) WCuplow[WCuplow_II_LEN + WCuplow_TI_LEN
										+ i + sc]) << 1;
		wc += WCuplow_diff[i + 1];
	}
	return wc;
}

#endif /* defined(L_towlower) && defined(__UCLIBC_HAS_XLOCALE__) */

#endif /* SMALL_UPLOW */

#ifdef L_towlower_l
weak_alias(__towlower_l, towlower_l)
#endif /* L_towlower_l */

#endif /* __LOCALE_C_ONLY */

#endif
/**********************************************************************/
#if defined(L_towupper) || defined(L_towupper_l)

#ifdef L_towupper
#define TOWUPPER(w) towupper(w)
#else  /* L_towupper */
#define TOWUPPER(w) __towupper_l(w, __locale_t locale)
#undef __UCLIBC_CURLOCALE_DATA
#undef __UCLIBC_CURLOCALE
#define __UCLIBC_CURLOCALE_DATA (*locale)
#define __UCLIBC_CURLOCALE (locale)
#endif /* L_towupper */

#ifdef __UCLIBC_HAS_XLOCALE__
#define TOWCTRANS(w,d) __towctrans_l(w,d, __UCLIBC_CURLOCALE)
#else  /* __UCLIBC_HAS_XLOCALE__ */
#define TOWCTRANS(w,d) towctrans(w,d)
#endif /* __UCLIBC_HAS_XLOCALE__ */

#define __C_towupper(wc) \
	((((__uwchar_t)(wc)) <= 0x7f) ? (__C_ctype_toupper)[(wc)] : (wc))

#ifdef __LOCALE_C_ONLY

wint_t towupper(wint_t wc)
{
#ifdef __UCLIBC_HAS_CTYPE_TABLES__
	return __C_towupper(wc);
#else
	return (wc == ((unsigned int)(wc)))
		? __C_toupper(((unsigned int)(wc)))
		: 0;
#endif

}

#else  /* __LOCALE_C_ONLY */

#ifdef SMALL_UPLOW

#if defined(L_towupper) && defined(__UCLIBC_HAS_XLOCALE__)

wint_t towupper(wint_t wc)
{
	return __towctrans_l(wc, _CTYPE_toupper, __UCLIBC_CURLOCALE);
}

#else  /* defined(L_towupper) && defined(__UCLIBC_HAS_XLOCALE__) */

wint_t TOWUPPER(wint_t wc)
{
	return TOWCTRANS(wc, _CTYPE_toupper);
}

#endif /* defined(L_towupper) && defined(__UCLIBC_HAS_XLOCALE__) */

#else  /* SMALL_UPLOW */

#if defined(L_towupper) && defined(__UCLIBC_HAS_XLOCALE__)

wint_t towupper(wint_t wc)
{
	return __towupper_l(wc, __UCLIBC_CURLOCALE);
}

#else  /* defined(L_towupper) && defined(__UCLIBC_HAS_XLOCALE__) */

wint_t TOWUPPER(wint_t wc)
{
	unsigned int sc, n, i;
	__uwchar_t u = wc;

	if (ENCODING == __ctype_encoding_7_bit) {
		/* We're in the C/POSIX locale, so ignore the tables. */
		return __C_towupper(wc);
	}

	if (u <= WC_TABLE_DOMAIN_MAX) {
		sc = u & ((1 << WCuplow_TI_SHIFT) - 1);
		u >>= WCuplow_TI_SHIFT;
		n = u & ((1 << WCuplow_II_SHIFT) - 1);
		u >>= WCuplow_II_SHIFT;

		i = ((unsigned int) WCuplow[u]) << WCuplow_II_SHIFT;
		i = ((unsigned int) WCuplow[WCuplow_II_LEN + i + n])
			<< WCuplow_TI_SHIFT;
		i = ((unsigned int) WCuplow[WCuplow_II_LEN + WCuplow_TI_LEN
										+ i + sc]) << 1;
		wc += WCuplow_diff[i];
	}
	return wc;
}

#endif /* defined(L_towupper) && defined(__UCLIBC_HAS_XLOCALE__) */

#endif /* SMALL_UPLOW */

#ifdef L_towupper_l
weak_alias(__towupper_l, towupper_l)
#endif /* L_towupper_l */

#endif /* __LOCALE_C_ONLY */

#endif
/**********************************************************************/
#ifdef L_wctype

static const unsigned char typestring[] = __CTYPE_TYPESTRING;
/*  extern const unsigned char typestring[]; */

wctype_t wctype(const char *property)
{
	const unsigned char *p;
	int i;

	p = typestring;
	i = 1;
	do {
		if (!strcmp(property, ++p)) {
			return i;
		}
		++i;
		p += p[-1];
	} while (*p);

	/* TODO - Add locale-specific classifications. */
	return 0;
}

#endif
/**********************************************************************/
#ifdef L_wctype_l

#ifdef __UCLIBC_MJN3_ONLY__
#warning REMINDER: Currently wctype_l simply calls wctype.
#endif /* __UCLIBC_MJN3_ONLY__ */

wctype_t __wctype_l (const char *property, __locale_t locale)
{
	return wctype(property);
}

weak_alias(__wctype_l, wctype_l)

#endif
/**********************************************************************/
#if defined(L_iswctype) || defined(L_iswctype_l)

#define __C_iswdigit(c) \
	((sizeof(c) == sizeof(char)) \
	 ? (((unsigned char)((c) - '0')) < 10) \
	 : (((__uwchar_t)((c) - '0')) < 10))
#define __C_iswxdigit(c) \
	(__C_iswdigit(c) \
	 || ((sizeof(c) == sizeof(char)) \
		 ? (((unsigned char)((((c)) | 0x20) - 'a')) < 6) \
		 : (((__uwchar_t)((((c)) | 0x20) - 'a')) < 6)))

#ifdef __UCLIBC_MJN3_ONLY__
#ifdef L_iswctype
#warning CONSIDER: Change to bit shift?  would need to sync with wctype.h
#endif
#endif /* __UCLIBC_MJN3_ONLY__ */


#ifdef __UCLIBC_HAS_CTYPE_TABLES__
#if !defined(__UCLIBC_HAS_XLOCALE__) || defined(L_iswctype_l)

static const unsigned short int desc2flag[] = {
	[_CTYPE_unclassified] = 0,
	[_CTYPE_isalnum] = (unsigned short int) _ISwalnum,
	[_CTYPE_isalpha] = (unsigned short int) _ISwalpha,
	[_CTYPE_isblank] = (unsigned short int) _ISwblank,
	[_CTYPE_iscntrl] = (unsigned short int) _ISwcntrl,
	[_CTYPE_isdigit] = (unsigned short int) _ISwdigit,
	[_CTYPE_isgraph] = (unsigned short int) _ISwgraph,
	[_CTYPE_islower] = (unsigned short int) _ISwlower,
	[_CTYPE_isprint] = (unsigned short int) _ISwprint,
	[_CTYPE_ispunct] = (unsigned short int) _ISwpunct,
	[_CTYPE_isspace] = (unsigned short int) _ISwspace,
	[_CTYPE_isupper] = (unsigned short int) _ISwupper,
	[_CTYPE_isxdigit] = (unsigned short int) _ISwxdigit,
};

#endif /* defined(L_iswctype_L) || defined(__LOCALE_C_ONLY) */
#endif /* __UCLIBC_HAS_CTYPE_TABLES__ */

#ifdef __LOCALE_C_ONLY

#ifdef __UCLIBC_HAS_CTYPE_TABLES__

int __iswctype(wint_t wc, wctype_t desc)
{
	/* Note... wctype_t is unsigned. */

	if ((((__uwchar_t) wc) <= 0x7f)
		&& (desc < (sizeof(desc2flag)/sizeof(desc2flag[0])))
		) {
		return __isctype(wc, desc2flag[desc]);
	}
	return 0;
}

#else  /* __UCLIBC_HAS_CTYPE_TABLES__ */

int __iswctype(wint_t wc, wctype_t desc)
{
	/* This is lame, but it is here just to get it working for now. */

	if (wc == ((unsigned int)(wc))) {
		switch(desc) {
			case _CTYPE_isupper:
				return __C_isupper((unsigned int)(wc));
			case _CTYPE_islower:
				return __C_islower((unsigned int)(wc));
			case _CTYPE_isalpha:
				return __C_isalpha((unsigned int)(wc));
			case _CTYPE_isdigit:
				return __C_isdigit((unsigned int)(wc));
			case _CTYPE_isxdigit:
				return __C_isxdigit((unsigned int)(wc));
			case _CTYPE_isspace:
				return __C_isspace((unsigned int)(wc));
			case _CTYPE_isprint:
				return __C_isprint((unsigned int)(wc));
			case _CTYPE_isgraph:
				return __C_isgraph((unsigned int)(wc));
			case _CTYPE_isblank:
				return __C_isblank((unsigned int)(wc));
			case _CTYPE_iscntrl:
				return __C_iscntrl((unsigned int)(wc));
			case _CTYPE_ispunct:
				return __C_ispunct((unsigned int)(wc));
			case _CTYPE_isalnum:
				return __C_isalnum((unsigned int)(wc));
			default:
				break;
		}
	}
	return 0;
}

#endif /* __UCLIBC_HAS_CTYPE_TABLES__ */

#else  /* __LOCALE_C_ONLY */

#ifdef __UCLIBC_MJN3_ONLY__
#ifdef L_iswctype
#warning CONSIDER: Handle combining class?
#endif
#endif /* __UCLIBC_MJN3_ONLY__ */

#ifdef L_iswctype
#define ISWCTYPE(w,d) __iswctype(w,d)
#else  /* L_iswctype */
#define ISWCTYPE(w,d) __iswctype_l(w,d, __locale_t locale)
#undef __UCLIBC_CURLOCALE_DATA
#undef __UCLIBC_CURLOCALE
#define __UCLIBC_CURLOCALE_DATA (*locale)
#define __UCLIBC_CURLOCALE (locale)
#endif /* L_iswctype */

#if defined(L_iswctype) && defined(__UCLIBC_HAS_XLOCALE__)

int __iswctype(wint_t wc, wctype_t desc)
{
	return __iswctype_l(wc, desc, __UCLIBC_CURLOCALE);
}

#else  /* defined(L_iswctype) && defined(__UCLIBC_HAS_XLOCALE__) */

int ISWCTYPE(wint_t wc, wctype_t desc)
{
	unsigned int sc, n, i0, i1;
	unsigned char d = __CTYPE_unclassified;

	if ((ENCODING != __ctype_encoding_7_bit) || (((__uwchar_t) wc) <= 0x7f)){
		if (desc < _CTYPE_iswxdigit) {
			if (((__uwchar_t) wc) <= WC_TABLE_DOMAIN_MAX) {
				/* From here on, we know wc > 0. */
				sc = wc & WCctype_TI_MASK;
				wc >>= WCctype_TI_SHIFT;
				n = wc & WCctype_II_MASK;
				wc >>= WCctype_II_SHIFT;

				i0 = WCctype[wc];
				i0 <<= WCctype_II_SHIFT;
				i1 = WCctype[WCctype_II_LEN + i0 + n];
				i1 <<= (WCctype_TI_SHIFT-1);
				d = WCctype[WCctype_II_LEN + WCctype_TI_LEN + i1 + (sc >> 1)];

				d = (sc & 1) ? (d >> 4) : (d & 0xf);
			} else if ( ((((__uwchar_t)(wc - 0xe0020UL)) <= 0x5f)
						 || (wc == 0xe0001UL))
						|| ( (((__uwchar_t)(wc - 0xf0000UL)) < 0x20000UL)
							 && ((wc & 0xffffU) <= 0xfffdU))
						) {
				d = __CTYPE_punct;
			}

#if 0
			return ( ((unsigned char)(d - ctype_range[2*desc]))
					 <= ctype_range[2*desc + 1] )
				&& ((desc != _CTYPE_iswblank) || (d & 1));
#else
			return (__UCLIBC_CURLOCALE_DATA).code2flag[d] & desc2flag[desc];
#endif
		}

#ifdef __UCLIBC_MJN3_ONLY__
#warning TODO: xdigit really needs to be handled better.  Remember only for ascii!
#endif /* __UCLIBC_MJN3_ONLY__ */
		/* TODO - Add locale-specific classifications. */
		return (desc == _CTYPE_iswxdigit) ? __C_iswxdigit(wc) : 0;
	}
	return 0;
}

#endif /* defined(L_iswctype) && defined(__UCLIBC_HAS_XLOCALE__) */

#ifdef L_iswctype_l
weak_alias(__iswctype_l, iswctype_l)
#endif /* L_iswctype_l */

#endif /* __LOCALE_C_ONLY */

#ifdef L_iswctype
weak_alias(__iswctype, iswctype)
#endif /* L_iswctype */

#endif
/**********************************************************************/
#if defined(L_towctrans) || defined(L_towctrans_l)

#ifdef __LOCALE_C_ONLY

/* Minimal support for C/POSIX locale. */

#ifndef _tolower
#warning _tolower is undefined!
#define _tolower(c)    tolower(c)
#endif
#ifndef _toupper
#warning _toupper is undefined!
#define _toupper(c)    toupper(c)
#endif

wint_t towctrans(wint_t wc, wctrans_t desc)
{
	if (((unsigned int)(desc - _CTYPE_tolower))
		<= (_CTYPE_toupper - _CTYPE_tolower)
		) {
		/* Transliteration is either tolower or toupper. */
		if (((__uwchar_t) wc) <= 0x7f) {
			return (desc == _CTYPE_tolower) ? _tolower(wc) : _toupper(wc);
		}
	} else {
		__set_errno(EINVAL);	/* Invalid transliteration. */
	}
	return wc;
}

#else  /* __LOCALE_C_ONLY */

#ifdef L_towctrans
#define TOWCTRANS(w,d) towctrans(w,d)
#else  /* L_towctrans */
#define TOWCTRANS(w,d) __towctrans_l(w,d, __locale_t locale)
#undef __UCLIBC_CURLOCALE_DATA
#undef __UCLIBC_CURLOCALE
#define __UCLIBC_CURLOCALE_DATA (*locale)
#define __UCLIBC_CURLOCALE (locale)
#endif /* L_towctrans */

#ifdef __UCLIBC_HAS_XLOCALE__
#define TOWLOWER(w,l) __towlower_l(w,l)
#define TOWUPPER(w,l) __towupper_l(w,l)
#else  /* __UCLIBC_HAS_XLOCALE__ */
#define TOWLOWER(w,l) towlower(w)
#define TOWUPPER(w,l) towupper(w)
#endif /* __UCLIBC_HAS_XLOCALE__ */

#if defined(L_towctrans) && defined(__UCLIBC_HAS_XLOCALE__)

wint_t towctrans(wint_t wc, wctrans_t desc)
{
	return __towctrans_l(wc, desc, __UCLIBC_CURLOCALE);
}

#else  /* defined(L_towctrans) && defined(__UCLIBC_HAS_XLOCALE__) */

#ifdef SMALL_UPLOW

wint_t TOWCTRANS(wint_t wc, wctrans_t desc)
{
	unsigned int sc, n, i;
	__uwchar_t u = wc;

	/* TODO - clean up */
	if (ENCODING == __ctype_encoding_7_bit) {
		if ((((__uwchar_t) wc) > 0x7f)
			|| (((unsigned int)(desc - _CTYPE_tolower))
				> (_CTYPE_toupper - _CTYPE_tolower))
			){
			/* We're in the C/POSIX locale, so ignore non-ASCII values
			 * as well an any mappings other than toupper or tolower. */
			return wc;
		}
	}

	if (((unsigned int)(desc - _CTYPE_tolower))
		<= (_CTYPE_totitle - _CTYPE_tolower)
		) {
		if (u <= WC_TABLE_DOMAIN_MAX) {
			sc = u & ((1 << WCuplow_TI_SHIFT) - 1);
			u >>= WCuplow_TI_SHIFT;
			n = u & ((1 << WCuplow_II_SHIFT) - 1);
			u >>= WCuplow_II_SHIFT;

			i = ((unsigned int) WCuplow[u]) << WCuplow_II_SHIFT;
			i = ((unsigned int) WCuplow[WCuplow_II_LEN + i + n])
				<< WCuplow_TI_SHIFT;
			i = ((unsigned int) WCuplow[WCuplow_II_LEN + WCuplow_TI_LEN
											+ i + sc]) << 1;
			if (desc == _CTYPE_tolower) {
				++i;
			}
			wc += WCuplow_diff[i];
			if (desc == _CTYPE_totitle) {
#ifdef __UCLIBC_MJN3_ONLY__
#warning TODO: Verify totitle special cases!
#endif /* __UCLIBC_MJN3_ONLY__ */
				/* WARNING! These special cases work for glibc 2.2.4.  Changes
				 * may be needed if the glibc locale tables are updated. */
				if ( (((__uwchar_t)(wc - 0x1c4)) <= (0x1cc - 0x1c4))
					 || (wc == 0x1f1)
					 ) {
					++wc;
				}
			}
		}
	} else {
		/* TODO - Deal with other transliterations. */
		__set_errno(EINVAL);
	}

	return wc;
}

#else  /* SMALL_UPLOW */

wint_t TOWCTRANS(wint_t wc, wctrans_t desc)
{
	if (ENCODING == __ctype_encoding_7_bit) {
		if ((((__uwchar_t) wc) > 0x7f)
			|| (((unsigned int)(desc - _CTYPE_tolower))
				> (_CTYPE_toupper - _CTYPE_tolower))
			){
			/* We're in the C/POSIX locale, so ignore non-ASCII values
			 * as well an any mappings other than toupper or tolower. */
			return wc;
		}
	}

	if (desc == _CTYPE_tolower) {
		return TOWLOWER(wc, __UCLIBC_CURLOCALE);
	} else if (((unsigned int)(desc - _CTYPE_toupper))
		<= (_CTYPE_totitle - _CTYPE_toupper)
		) {
		wc = TOWUPPER(wc, __UCLIBC_CURLOCALE);
		if (desc == _CTYPE_totitle) {
#ifdef __UCLIBC_MJN3_ONLY__
#warning TODO: Verify totitle special cases!
#endif /* __UCLIBC_MJN3_ONLY__ */
			/* WARNING! These special cases work for glibc 2.2.4.  Changes
			 * may be needed if the glibc locale tables are updated. */
			if ( (((__uwchar_t)(wc - 0x1c4)) <= (0x1cc - 0x1c4))
				 || (wc == 0x1f1)
				 ) {
				++wc;
			}
		}
	} else {
		/* TODO - Deal with other transliterations. */
		__set_errno(EINVAL);
	}
	return wc;
}

#endif /* SMALL_UPLOW */

#endif /* defined(L_towctrans) && defined(__UCLIBC_HAS_XLOCALE__) */

#ifdef L_towctrans_l
weak_alias(__towctrans_l, towctrans_l)
#endif /* L_towctrans_l */

#endif /* __LOCALE_C_ONLY */

#endif
/**********************************************************************/
#ifdef L_wctrans

static const char transstring[] = __CTYPE_TRANSTRING;

wctrans_t wctrans(const char *property)
{
	const unsigned char *p;
	int i;

	p = transstring;
	i = 1;
	do {
		if (!strcmp(property, ++p)) {
			return i;
		}
		++i;
		p += p[-1];
	} while (*p);

	/* TODO - Add locale-specific translations. */
	return 0;
}

#endif
/**********************************************************************/
#ifdef L_wctrans_l

#ifdef __UCLIBC_MJN3_ONLY__
#warning REMINDER: Currently wctrans_l simply calls wctrans.
#endif /* __UCLIBC_MJN3_ONLY__ */

wctrans_t __wctrans_l(const char *property, __locale_t locale)
{
	return wctrans(property);
}

weak_alias(__wctrans_l, wctrans_l)

#endif
/**********************************************************************/