libstdc++
std::ctype< wchar_t > Class Template Reference
Inheritance diagram for std::ctype< wchar_t >:

List of all members.

Public Types

typedef const int * __to_type
typedef wctype_t __wmask_type
typedef wchar_t char_type
typedef unsigned short mask

Public Member Functions

 ctype (size_t __refs=0)
 ctype (__c_locale __cloc, size_t __refs=0)
bool is (mask __m, char_type __c) const
const char_typeis (const char_type *__lo, const char_type *__hi, mask *__vec) const
char narrow (char_type __c, char __dfault) const
const char_typenarrow (const char_type *__lo, const char_type *__hi, char __dfault, char *__to) const
const char_typescan_is (mask __m, const char_type *__lo, const char_type *__hi) const
const char_typescan_not (mask __m, const char_type *__lo, const char_type *__hi) const
char_type tolower (char_type __c) const
const char_typetolower (char_type *__lo, const char_type *__hi) const
char_type toupper (char_type __c) const
const char_typetoupper (char_type *__lo, const char_type *__hi) const
char_type widen (char __c) const
const char * widen (const char *__lo, const char *__hi, char_type *__to) const

Static Public Attributes

static const mask alnum
static const mask alpha
static const mask cntrl
static const mask digit
static const mask graph
static locale::id id
static const mask lower
static const mask print
static const mask punct
static const mask space
static const mask upper
static const mask xdigit

Protected Member Functions

virtual ~ctype ()
__wmask_type _M_convert_to_wmask (const mask __m) const throw ()
void _M_initialize_ctype () throw ()
virtual bool do_is (mask __m, char_type __c) const
virtual const char_typedo_is (const char_type *__lo, const char_type *__hi, mask *__vec) const
virtual char do_narrow (char_type __c, char __dfault) const
virtual const char_typedo_narrow (const char_type *__lo, const char_type *__hi, char __dfault, char *__to) const
virtual const char_typedo_scan_is (mask __m, const char_type *__lo, const char_type *__hi) const
virtual const char_typedo_scan_not (mask __m, const char_type *__lo, const char_type *__hi) const
virtual char_type do_tolower (char_type __c) const
virtual const char_typedo_tolower (char_type *__lo, const char_type *__hi) const
virtual char_type do_toupper (char_type __c) const
virtual const char_typedo_toupper (char_type *__lo, const char_type *__hi) const
virtual char_type do_widen (char __c) const
virtual const char * do_widen (const char *__lo, const char *__hi, char_type *__to) const

Static Protected Member Functions

static __c_locale _S_clone_c_locale (__c_locale &__cloc) throw ()
static void _S_create_c_locale (__c_locale &__cloc, const char *__s, __c_locale __old=0)
static void _S_destroy_c_locale (__c_locale &__cloc)
static __c_locale _S_get_c_locale ()
static const char * _S_get_c_name () throw ()
static __c_locale _S_lc_ctype_c_locale (__c_locale __cloc, const char *__s)

Protected Attributes

mask _M_bit [16]
__c_locale _M_c_locale_ctype
char _M_narrow [128]
bool _M_narrow_ok
wint_t _M_widen [1+static_cast< unsigned char >(-1)]
__wmask_type _M_wmask [16]

Detailed Description

template<>
class std::ctype< wchar_t >

The ctype<wchar_t> specialization.

This class defines classification and conversion functions for the wchar_t type. It gets used by wchar_t streams for many I/O operations. The wchar_t specialization provides a number of optimizations as well.

ctype<wchar_t> inherits its public methods from __ctype_abstract_base<wchar_t>.

Definition at line 1177 of file locale_facets.h.


Member Typedef Documentation

typedef wchar_t std::ctype< wchar_t >::char_type

Typedef for the template parameter wchar_t.

Reimplemented from std::__ctype_abstract_base< wchar_t >.

Definition at line 1182 of file locale_facets.h.


Constructor & Destructor Documentation

std::ctype< wchar_t >::ctype ( size_t  __refs = 0)
explicit

Constructor performs initialization.

This is the constructor provided by the standard.

Parameters:
__refsPassed to the base facet class.
std::ctype< wchar_t >::ctype ( __c_locale  __cloc,
size_t  __refs = 0 
)
explicit

Constructor performs static initialization.

This constructor is used to construct the initial C locale facet.

Parameters:
__clocHandle to C locale data.
__refsPassed to the base facet class.
virtual std::ctype< wchar_t >::~ctype ( )
protectedvirtual

Destructor.


Member Function Documentation

virtual bool std::ctype< wchar_t >::do_is ( mask  __m,
char_type  __c 
) const
protectedvirtual

Test wchar_t classification.

This function finds a mask M for c and compares it to mask m.

do_is() is a hook for a derived facet to change the behavior of classifying. do_is() must always return the same result for the same input.

Parameters:
__cThe wchar_t to find the mask of.
__mThe mask to compare against.
Returns:
(M & __m) != 0.

Implements std::__ctype_abstract_base< wchar_t >.

virtual const char_type* std::ctype< wchar_t >::do_is ( const char_type __lo,
const char_type __hi,
mask *  __vec 
) const
protectedvirtual

Return a mask array.

This function finds the mask for each wchar_t in the range [lo,hi) and successively writes it to vec. vec must have as many elements as the input.

do_is() is a hook for a derived facet to change the behavior of classifying. do_is() must always return the same result for the same input.

Parameters:
__loPointer to start of range.
__hiPointer to end of range.
__vecPointer to an array of mask storage.
Returns:
__hi.

Implements std::__ctype_abstract_base< wchar_t >.

virtual char std::ctype< wchar_t >::do_narrow ( char_type  __c,
char  __dfault 
) const
protectedvirtual

Narrow wchar_t to char.

This virtual function converts the argument to char using the simplest reasonable transformation. If the conversion fails, dfault is returned instead. For an underived ctype<wchar_t> facet, c will be cast to char and returned.

do_narrow() is a hook for a derived facet to change the behavior of narrowing. do_narrow() must always return the same result for the same input.

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters:
__cThe wchar_t to convert.
__dfaultChar to return if conversion fails.
Returns:
The converted char.

Implements std::__ctype_abstract_base< wchar_t >.

virtual const char_type* std::ctype< wchar_t >::do_narrow ( const char_type __lo,
const char_type __hi,
char  __dfault,
char *  __to 
) const
protectedvirtual

Narrow wchar_t array to char array.

This virtual function converts each wchar_t in the range [lo,hi) to char using the simplest reasonable transformation and writes the results to the destination array. For any wchar_t in the input that cannot be converted, dfault is used instead. For an underived ctype<wchar_t> facet, the argument will be copied, casting each element to char.

do_narrow() is a hook for a derived facet to change the behavior of narrowing. do_narrow() must always return the same result for the same input.

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters:
__loPointer to start of range.
__hiPointer to end of range.
__dfaultChar to use if conversion fails.
__toPointer to the destination array.
Returns:
__hi.

Implements std::__ctype_abstract_base< wchar_t >.

virtual const char_type* std::ctype< wchar_t >::do_scan_is ( mask  __m,
const char_type __lo,
const char_type __hi 
) const
protectedvirtual

Find wchar_t matching mask.

This function searches for and returns the first wchar_t c in [lo,hi) for which is(__m,c) is true.

do_scan_is() is a hook for a derived facet to change the behavior of match searching. do_is() must always return the same result for the same input.

Parameters:
__mThe mask to compare against.
__loPointer to start of range.
__hiPointer to end of range.
Returns:
Pointer to a matching wchar_t if found, else __hi.

Implements std::__ctype_abstract_base< wchar_t >.

virtual const char_type* std::ctype< wchar_t >::do_scan_not ( mask  __m,
const char_type __lo,
const char_type __hi 
) const
protectedvirtual

Find wchar_t not matching mask.

This function searches for and returns a pointer to the first wchar_t c of [lo,hi) for which is(__m,c) is false.

do_scan_is() is a hook for a derived facet to change the behavior of match searching. do_is() must always return the same result for the same input.

Parameters:
__mThe mask to compare against.
__loPointer to start of range.
__hiPointer to end of range.
Returns:
Pointer to a non-matching wchar_t if found, else __hi.

Implements std::__ctype_abstract_base< wchar_t >.

virtual char_type std::ctype< wchar_t >::do_tolower ( char_type  __c) const
protectedvirtual

Convert to lowercase.

This virtual function converts the argument to lowercase if possible. If not possible (for example, '2'), returns the argument.

do_tolower() is a hook for a derived facet to change the behavior of lowercasing. do_tolower() must always return the same result for the same input.

Parameters:
__cThe wchar_t to convert.
Returns:
The lowercase wchar_t if convertible, else __c.

Implements std::__ctype_abstract_base< wchar_t >.

virtual const char_type* std::ctype< wchar_t >::do_tolower ( char_type __lo,
const char_type __hi 
) const
protectedvirtual

Convert array to lowercase.

This virtual function converts each wchar_t in the range [lo,hi) to lowercase if possible. Other elements remain untouched.

do_tolower() is a hook for a derived facet to change the behavior of lowercasing. do_tolower() must always return the same result for the same input.

Parameters:
__loPointer to start of range.
__hiPointer to end of range.
Returns:
__hi.

Implements std::__ctype_abstract_base< wchar_t >.

virtual char_type std::ctype< wchar_t >::do_toupper ( char_type  __c) const
protectedvirtual

Convert to uppercase.

This virtual function converts the wchar_t argument to uppercase if possible. If not possible (for example, '2'), returns the argument.

do_toupper() is a hook for a derived facet to change the behavior of uppercasing. do_toupper() must always return the same result for the same input.

Parameters:
__cThe wchar_t to convert.
Returns:
The uppercase wchar_t if convertible, else __c.

Implements std::__ctype_abstract_base< wchar_t >.

virtual const char_type* std::ctype< wchar_t >::do_toupper ( char_type __lo,
const char_type __hi 
) const
protectedvirtual

Convert array to uppercase.

This virtual function converts each wchar_t in the range [lo,hi) to uppercase if possible. Other elements remain untouched.

do_toupper() is a hook for a derived facet to change the behavior of uppercasing. do_toupper() must always return the same result for the same input.

Parameters:
__loPointer to start of range.
__hiPointer to end of range.
Returns:
__hi.

Implements std::__ctype_abstract_base< wchar_t >.

virtual char_type std::ctype< wchar_t >::do_widen ( char  __c) const
protectedvirtual

Widen char to wchar_t.

This virtual function converts the char to wchar_t using the simplest reasonable transformation. For an underived ctype<wchar_t> facet, the argument will be cast to wchar_t.

do_widen() is a hook for a derived facet to change the behavior of widening. do_widen() must always return the same result for the same input.

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters:
__cThe char to convert.
Returns:
The converted wchar_t.

Implements std::__ctype_abstract_base< wchar_t >.

virtual const char* std::ctype< wchar_t >::do_widen ( const char *  __lo,
const char *  __hi,
char_type __to 
) const
protectedvirtual

Widen char array to wchar_t array.

This function converts each char in the input to wchar_t using the simplest reasonable transformation. For an underived ctype<wchar_t> facet, the argument will be copied, casting each element to wchar_t.

do_widen() is a hook for a derived facet to change the behavior of widening. do_widen() must always return the same result for the same input.

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters:
__loPointer to start range.
__hiPointer to end of range.
__toPointer to the destination array.
Returns:
__hi.

Implements std::__ctype_abstract_base< wchar_t >.

bool std::__ctype_abstract_base< wchar_t >::is ( mask  __m,
char_type  __c 
) const
inlineinherited

Test char_type classification.

This function finds a mask M for __c and compares it to mask __m. It does so by returning the value of ctype<char_type>::do_is().

Parameters:
__cThe char_type to compare the mask of.
__mThe mask to compare against.
Returns:
(M & __m) != 0.

Definition at line 164 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_is().

const char_type* std::__ctype_abstract_base< wchar_t >::is ( const char_type __lo,
const char_type __hi,
mask *  __vec 
) const
inlineinherited

Return a mask array.

This function finds the mask for each char_type in the range [lo,hi) and successively writes it to vec. vec must have as many elements as the char array. It does so by returning the value of ctype<char_type>::do_is().

Parameters:
__loPointer to start of range.
__hiPointer to end of range.
__vecPointer to an array of mask storage.
Returns:
__hi.

Definition at line 181 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_is().

char std::__ctype_abstract_base< wchar_t >::narrow ( char_type  __c,
char  __dfault 
) const
inlineinherited

Narrow char_type to char.

This function converts the char_type to char using the simplest reasonable transformation. If the conversion fails, dfault is returned instead. It does so by returning ctype<char_type>::do_narrow(__c).

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters:
__cThe char_type to convert.
__dfaultChar to return if conversion fails.
Returns:
The converted char.

Definition at line 326 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_narrow().

const char_type* std::__ctype_abstract_base< wchar_t >::narrow ( const char_type __lo,
const char_type __hi,
char  __dfault,
char *  __to 
) const
inlineinherited

Narrow array to char array.

This function converts each char_type in the input to char using the simplest reasonable transformation and writes the results to the destination array. For any char_type in the input that cannot be converted, dfault is used instead. It does so by returning ctype<char_type>::do_narrow(__lo, __hi, __dfault, __to).

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters:
__loPointer to start of range.
__hiPointer to end of range.
__dfaultChar to use if conversion fails.
__toPointer to the destination array.
Returns:
__hi.

Definition at line 348 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_narrow().

const char_type* std::__ctype_abstract_base< wchar_t >::scan_is ( mask  __m,
const char_type __lo,
const char_type __hi 
) const
inlineinherited

Find char_type matching a mask.

This function searches for and returns the first char_type c in [lo,hi) for which is(m,c) is true. It does so by returning ctype<char_type>::do_scan_is().

Parameters:
__mThe mask to compare against.
__loPointer to start of range.
__hiPointer to end of range.
Returns:
Pointer to matching char_type if found, else __hi.

Definition at line 197 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_scan_is().

const char_type* std::__ctype_abstract_base< wchar_t >::scan_not ( mask  __m,
const char_type __lo,
const char_type __hi 
) const
inlineinherited

Find char_type not matching a mask.

This function searches for and returns the first char_type c in [lo,hi) for which is(m,c) is false. It does so by returning ctype<char_type>::do_scan_not().

Parameters:
__mThe mask to compare against.
__loPointer to first char in range.
__hiPointer to end of range.
Returns:
Pointer to non-matching char if found, else __hi.

Definition at line 213 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_scan_not().

char_type std::__ctype_abstract_base< wchar_t >::tolower ( char_type  __c) const
inlineinherited

Convert to lowercase.

This function converts the argument to lowercase if possible. If not possible (for example, '2'), returns the argument. It does so by returning ctype<char_type>::do_tolower(c).

Parameters:
__cThe char_type to convert.
Returns:
The lowercase char_type if convertible, else __c.

Definition at line 256 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_tolower().

const char_type* std::__ctype_abstract_base< wchar_t >::tolower ( char_type __lo,
const char_type __hi 
) const
inlineinherited

Convert array to lowercase.

This function converts each char_type in the range [lo,hi) to lowercase if possible. Other elements remain untouched. It does so by returning ctype<char_type>:: do_tolower(__lo, __hi).

Parameters:
__loPointer to start of range.
__hiPointer to end of range.
Returns:
__hi.

Definition at line 271 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_tolower().

char_type std::__ctype_abstract_base< wchar_t >::toupper ( char_type  __c) const
inlineinherited

Convert to uppercase.

This function converts the argument to uppercase if possible. If not possible (for example, '2'), returns the argument. It does so by returning ctype<char_type>::do_toupper().

Parameters:
__cThe char_type to convert.
Returns:
The uppercase char_type if convertible, else __c.

Definition at line 227 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_toupper().

const char_type* std::__ctype_abstract_base< wchar_t >::toupper ( char_type __lo,
const char_type __hi 
) const
inlineinherited

Convert array to uppercase.

This function converts each char_type in the range [lo,hi) to uppercase if possible. Other elements remain untouched. It does so by returning ctype<char_type>:: do_toupper(lo, hi).

Parameters:
__loPointer to start of range.
__hiPointer to end of range.
Returns:
__hi.

Definition at line 242 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_toupper().

char_type std::__ctype_abstract_base< wchar_t >::widen ( char  __c) const
inlineinherited

Widen char to char_type.

This function converts the char argument to char_type using the simplest reasonable transformation. It does so by returning ctype<char_type>::do_widen(c).

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters:
__cThe char to convert.
Returns:
The converted char_type.

Definition at line 288 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_widen().

const char* std::__ctype_abstract_base< wchar_t >::widen ( const char *  __lo,
const char *  __hi,
char_type __to 
) const
inlineinherited

Widen array to char_type.

This function converts each char in the input to char_type using the simplest reasonable transformation. It does so by returning ctype<char_type>::do_widen(c).

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters:
__loPointer to start of range.
__hiPointer to end of range.
__toPointer to the destination array.
Returns:
__hi.

Definition at line 307 of file locale_facets.h.

References std::__ctype_abstract_base< _CharT >::do_widen().


Member Data Documentation

locale::id std::ctype< wchar_t >::id
static

The facet id for ctype<wchar_t>

Definition at line 1200 of file locale_facets.h.


The documentation for this class was generated from the following file: