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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106/****towupper.cpp - convert wide character to upper case** Copyright (c) Microsoft Corporation. All rights reserved.**Purpose:* Defines towupper().********************************************************************************/#include <corecrt_internal.h>#include <ctype.h>#include <locale.h>
/****wint_t _towupper_l(c, ptloci) - convert wide character to upper case**Purpose:* Multi-thread function only! Non-locking version of towupper.**Entry:**Exit:**Exceptions:********************************************************************************/
extern "C" wint_t __cdecl _towupper_l( wint_t const c, _locale_t const plocinfo ){ if (c == WEOF) { return c; }
_LocaleUpdate _loc_update(plocinfo); auto const locinfo = _loc_update.GetLocaleT()->locinfo;
if (locinfo->_public._locale_lc_codepage == CP_UTF8) { // For 128 <= c < 256, the toupper map would consider the wide character as it is in UTF-8, not UTF-16. // Below 128, UTF-8 and UTF-16 have the same encodings, so we can use the table. if (c < 128) { return _towupper_fast_internal(static_cast<unsigned char>(c), _loc_update.GetLocaleT()); } } else { // For 128 <= c < 256, the toupper map will consider the wide character as it would be in the current narrow code page, // which can lead to unexpected behavior. This behavior is maintained for backwards compatibility. if (c < 256) { return _towupper_fast_internal(static_cast<unsigned char>(c), _loc_update.GetLocaleT()); }
if (locinfo->locale_name[LC_CTYPE] == nullptr) { // If the locale is C, then the only characters that would be transformed are <256 // and have been processed already. return c; } }
wint_t widechar; if (0 == __acrt_LCMapStringW( locinfo->locale_name[LC_CTYPE], LCMAP_UPPERCASE, (LPCWSTR)&c, 1, (LPWSTR)&widechar, 1)) { return c; }
return widechar;}
/****wint_t towupper(c) - convert wide character to upper case**Purpose:* towupper() returns the uppercase equivalent of its argument**Entry:* c - wint_t value of character to be converted**Exit:* if c is a lower case letter, returns wint_t value of upper case* representation of c. otherwise, it returns c.**Exceptions:********************************************************************************/
extern "C" wint_t __cdecl towupper ( wint_t c ){
return _towupper_l(c, nullptr);}