This class defines classification and conversion functions for the char type. It gets used by char streams for many I/O operations. The char specialization provides a number of optimizations as well.
Definition at line 674 of file locale_facets.h.
typedef char std::ctype< char >::char_type |
std::ctype< char >::ctype | ( | const mask * | __table = 0 , |
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bool | __del = false , |
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size_t | __refs = 0 | |||
) | [explicit] |
Constructor performs initialization.
This is the constructor provided by the standard.
table | If non-zero, table is used as the per-char mask. Else classic_table() is used. | |
del | If true, passes ownership of table to this facet. | |
refs | Passed to the base facet class. |
std::ctype< char >::ctype | ( | __c_locale | __cloc, | |
const mask * | __table = 0 , |
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bool | __del = false , |
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size_t | __refs = 0 | |||
) | [explicit] |
virtual std::ctype< char >::~ctype | ( | ) | [protected, virtual] |
Destructor.
This function deletes table() if del was true in the constructor.
static const mask* std::ctype< char >::classic_table | ( | ) | throw () [static] |
Returns a pointer to the C locale mask table.
virtual const char_type* std::ctype< char >::do_narrow | ( | const char_type * | __lo, | |
const char_type * | __hi, | |||
char | , | |||
char * | __dest | |||
) | const [inline, protected, virtual] |
Narrow char array to char array.
This virtual function converts each char in the range [lo,hi) to char using the simplest reasonable transformation and writes the results to the destination array. For any char in the input that cannot be converted, dfault is used instead. For an underived ctype<char> facet, the argument will be copied unchanged.
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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. | |
dfault | Char to use if conversion fails. | |
to | Pointer to the destination array. |
Definition at line 1150 of file locale_facets.h.
virtual char std::ctype< char >::do_narrow | ( | char_type | __c, | |
char | ||||
) | const [inline, protected, virtual] |
Narrow char.
This virtual function converts the char to char using the simplest reasonable transformation. If the conversion fails, dfault is returned instead. For an underived ctype<char> facet, c will be returned unchanged.
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.
c | The char to convert. | |
dfault | Char to return if conversion fails. |
Definition at line 1124 of file locale_facets.h.
virtual const char_type* std::ctype< char >::do_tolower | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [protected, virtual] |
Convert array to lowercase.
This virtual function converts each char in the range [lo,hi) to lowercase if possible. Other chars 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.
lo | Pointer to first char in range. | |
hi | Pointer to end of range. |
virtual char_type std::ctype< char >::do_tolower | ( | char_type | ) | const [protected, virtual] |
Convert to lowercase.
This virtual function converts the char 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.
c | The char to convert. |
virtual const char_type* std::ctype< char >::do_toupper | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [protected, virtual] |
Convert array to uppercase.
This virtual function converts each char in the range [lo,hi) to uppercase if possible. Other chars 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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
virtual char_type std::ctype< char >::do_toupper | ( | char_type | ) | const [protected, virtual] |
Convert to uppercase.
This virtual function converts the char 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.
c | The char to convert. |
virtual const char* std::ctype< char >::do_widen | ( | const char * | __lo, | |
const char * | __hi, | |||
char_type * | __dest | |||
) | const [inline, protected, virtual] |
Widen char array.
This function converts each char in the range [lo,hi) to char using the simplest reasonable transformation. For an underived ctype<char> facet, the argument will be copied unchanged.
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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. | |
to | Pointer to the destination array. |
Definition at line 1098 of file locale_facets.h.
virtual char_type std::ctype< char >::do_widen | ( | char | __c | ) | const [inline, protected, virtual] |
Widen char.
This virtual function converts the char to char using the simplest reasonable transformation. For an underived ctype<char> facet, the argument will be returned unchanged.
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.
c | The char to convert. |
Definition at line 1075 of file locale_facets.h.
const char * std::ctype< char >::is | ( | const char * | __lo, | |
const char * | __hi, | |||
mask * | __vec | |||
) | const [inline] |
Return a mask array.
This function finds the mask for each char in the range [lo, hi) and successively writes it to vec. vec must have as many elements as the char array.
lo | Pointer to start of range. | |
hi | Pointer to end of range. | |
vec | Pointer to an array of mask storage. |
Definition at line 46 of file ctype_inline.h.
bool std::ctype< char >::is | ( | mask | __m, | |
char | __c | |||
) | const [inline] |
Test char classification.
This function compares the mask table[c] to m.
c | The char to compare the mask of. | |
m | The mask to compare against. |
Definition at line 41 of file ctype_inline.h.
const char_type* std::ctype< char >::narrow | ( | const char_type * | __lo, | |
const char_type * | __hi, | |||
char | __dfault, | |||
char * | __to | |||
) | const [inline] |
Narrow char array.
This function converts each char in the input to char using the simplest reasonable transformation and writes the results to the destination array. For any char in the input that cannot be converted, dfault is used instead. For an underived ctype<char> facet, the argument will be copied unchanged.
This function works as if it returns ctype<char>::do_narrow(lo, hi, dfault, to). 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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. | |
dfault | Char to use if conversion fails. | |
to | Pointer to the destination array. |
Definition at line 956 of file locale_facets.h.
char std::ctype< char >::narrow | ( | char_type | __c, | |
char | __dfault | |||
) | const [inline] |
Narrow char.
This function converts the char to char using the simplest reasonable transformation. If the conversion fails, dfault is returned instead. For an underived ctype<char> facet, c will be returned unchanged.
This function works as if it returns ctype<char>::do_narrow(c). 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.
c | The char to convert. | |
dfault | Char to return if conversion fails. |
Definition at line 923 of file locale_facets.h.
const char * std::ctype< char >::scan_is | ( | mask | __m, | |
const char * | __lo, | |||
const char * | __hi | |||
) | const [inline] |
Find char matching a mask.
This function searches for and returns the first char in [lo,hi) for which is(m,char) is true.
m | The mask to compare against. | |
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Definition at line 55 of file ctype_inline.h.
const char * std::ctype< char >::scan_not | ( | mask | __m, | |
const char * | __lo, | |||
const char * | __hi | |||
) | const [inline] |
Find char not matching a mask.
This function searches for and returns a pointer to the first char in [lo,hi) for which is(m,char) is false.
m | The mask to compare against. | |
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Definition at line 65 of file ctype_inline.h.
const mask* std::ctype< char >::table | ( | ) | const throw () [inline] |
Returns a pointer to the mask table provided to the constructor, or the default from classic_table() if none was provided.
Definition at line 974 of file locale_facets.h.
const char_type* std::ctype< char >::tolower | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [inline] |
Convert array to lowercase.
This function converts each char in the range [lo,hi) to lowercase if possible. Other chars remain untouched.
tolower() acts as if it returns ctype<char>:: do_tolower(lo, hi). do_tolower() must always return the same result for the same input.
lo | Pointer to first char in range. | |
hi | Pointer to end of range. |
Definition at line 845 of file locale_facets.h.
char_type std::ctype< char >::tolower | ( | char_type | __c | ) | const [inline] |
Convert to lowercase.
This function converts the char argument to lowercase if possible. If not possible (for example, '2'), returns the argument.
tolower() acts as if it returns ctype<char>::do_tolower(c). do_tolower() must always return the same result for the same input.
c | The char to convert. |
Definition at line 828 of file locale_facets.h.
const char_type* std::ctype< char >::toupper | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [inline] |
Convert array to uppercase.
This function converts each char in the range [lo,hi) to uppercase if possible. Other chars remain untouched.
toupper() acts as if it returns ctype<char>:: do_toupper(lo, hi). do_toupper() must always return the same result for the same input.
lo | Pointer to first char in range. | |
hi | Pointer to end of range. |
Definition at line 812 of file locale_facets.h.
char_type std::ctype< char >::toupper | ( | char_type | __c | ) | const [inline] |
Convert to uppercase.
This function converts the char argument to uppercase if possible. If not possible (for example, '2'), returns the argument.
toupper() acts as if it returns ctype<char>::do_toupper(c). do_toupper() must always return the same result for the same input.
c | The char to convert. |
Definition at line 795 of file locale_facets.h.
const char* std::ctype< char >::widen | ( | const char * | __lo, | |
const char * | __hi, | |||
char_type * | __to | |||
) | const [inline] |
Widen char array.
This function converts each char in the input to char using the simplest reasonable transformation. For an underived ctype<char> facet, the argument will be copied unchanged.
This function works as if it returns ctype<char>::do_widen(c). 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.
lo | Pointer to first char in range. | |
hi | Pointer to end of range. | |
to | Pointer to the destination array. |
Definition at line 892 of file locale_facets.h.
char_type std::ctype< char >::widen | ( | char | __c | ) | const [inline] |
Widen char.
This function converts the char to char_type using the simplest reasonable transformation. For an underived ctype<char> facet, the argument will be returned unchanged.
This function works as if it returns ctype<char>::do_widen(c). 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.
c | The char to convert. |
Definition at line 865 of file locale_facets.h.
locale::id std::ctype< char >::id [static] |
const size_t std::ctype< char >::table_size [static] |