tolower_toupper.cpp File Reference

#include <corecrt_internal.h>
#include <ctype.h>
#include <locale.h>
#include <stdio.h>

Include dependency graph for tolower_toupper.cpp:

Go to the source code of this file.

Typedefs
typedef unsigned	char(__cdecl internal_map_type) (unsigned char
typedef unsigned	_locale_t

Functions
static __forceinline int __cdecl	common_tox_win_lookup (int const c, DWORD const map_flag, _locale_t const locale) throw ()
template<internal_map_type & MapType>
static __forceinline int __cdecl	common_tox_l (int const c, DWORD const map_flag, _locale_t const locale) throw ()
int __cdecl	_tolower_l (int const c, _locale_t const locale)
int __cdecl	tolower (int const c)
	int (__cdecl _tolower)(int const c)
int __cdecl	_toupper_l (int const c, _locale_t const locale)
int __cdecl	toupper (int const c)

Typedef Documentation

_locale_t

typedef unsigned _locale_t

Definition at line 15 of file tolower_toupper.cpp.

char

typedef unsigned char(__cdecl internal_map_type)(unsigned char

Definition at line 15 of file tolower_toupper.cpp.

Function Documentation

_tolower_l()

int __cdecl _tolower_l	(	int const	c,
		_locale_t const	locale
	)

Definition at line 83 of file tolower_toupper.cpp.

{
    return common_tox_l<_tolower_fast_internal>(c, LCMAP_LOWERCASE, locale);
}

Referenced by tolower().

_toupper_l()

int __cdecl _toupper_l	(	int const	c,
		_locale_t const	locale
	)

Definition at line 102 of file tolower_toupper.cpp.

{
    return common_tox_l<_toupper_fast_internal>(c, LCMAP_UPPERCASE, locale);
}

Referenced by toupper().

common_tox_l()

template<internal_map_type & MapType>

static __forceinline int __cdecl common_tox_l ( int const  c, DWORD const  map_flag, _locale_t const  locale  ) throw ( )

static

Definition at line 66 of file tolower_toupper.cpp.

{
    if (c == EOF)
    {
        return EOF;
    }
 
    _LocaleUpdate locale_update(locale);
 
    if (static_cast<unsigned>(c) < 256)
    {
        return MapType(static_cast<unsigned char>(c), locale_update.GetLocaleT());
    }
 
    return common_tox_win_lookup(c, map_flag, locale_update.GetLocaleT());
}

common_tox_win_lookup()

static __forceinline int __cdecl common_tox_win_lookup ( int const  c, DWORD const  map_flag, _locale_t const  locale  ) throw ( )

static

Definition at line 17 of file tolower_toupper.cpp.

{
    // Convert the character to a multibyte string:
    size_t        in_count    {};
    unsigned char in_buffer[3]{};
    if (locale->locinfo->_public._locale_mb_cur_max > 1 && _isleadbyte_fast_internal(c >> 8 & 0xff, locale))
    {
        in_buffer[0] = c >> 8 & 0xff; // Put the lead byte at start of the string
        in_buffer[1] = static_cast<unsigned char>(c);
        in_buffer[2] = 0;
        in_count     = 2;
    }
    else
    {
        // This is undefined behavior: should probably use the wide form instead
        errno = EILSEQ;
        in_buffer[0] = static_cast<unsigned char>(c);
        in_buffer[1] = 0;
        in_count     = 1;
    }
 
    // Convert the wide character equivalent to the target case:
    unsigned char out_buffer[3]{};
    int const out_count = __acrt_LCMapStringA(
        locale,
        locale->locinfo->locale_name[LC_CTYPE],
        map_flag,
        reinterpret_cast<char const*>(in_buffer),
        static_cast<int>(in_count),
        reinterpret_cast<char*>(out_buffer),
        static_cast<int>(_countof(out_buffer)),
        locale->locinfo->_public._locale_lc_codepage,
        TRUE);
 
    if (out_count == 0)
    {
        return c;
    }
 
    // Form the integer return value:
    if (out_count == 1)
    {
        return static_cast<int>(out_buffer[0]);
    }
 
    return static_cast<int>(out_buffer[1]) | (static_cast<int>(out_buffer[0]) << 8);
}

Referenced by common_tox_l().

int()

int

(

__cdecl

_tolower

)

const

Definition at line 95 of file tolower_toupper.cpp.

{
    return c - 'A' + 'a';
}

tolower()

int __cdecl tolower

(

int const

c

)

Definition at line 88 of file tolower_toupper.cpp.

{
    return __acrt_locale_changed()
        ? _tolower_l(c, nullptr)
        : __ascii_tolower(c);
}

toupper()

int __cdecl toupper

(

int const

c

)

Definition at line 107 of file tolower_toupper.cpp.

{
    return __acrt_locale_changed()
        ? _toupper_l(c, nullptr)
        : __ascii_toupper(c);
}