#include <codecvt.h>
Inheritance diagram for __codecvt_abstract_base< _InternT, _ExternT, _StateT >:
Public Types | |
| typedef codecvt_base::result | result |
| typedef _InternT | intern_type |
| typedef _ExternT | extern_type |
| typedef _StateT | state_type |
Public Member Functions | |
| result | out (state_type &__state, const intern_type *__from, const intern_type *__from_end, const intern_type *&__from_next, extern_type *__to, extern_type *__to_end, extern_type *&__to_next) const |
| Convert from internal to external character set. | |
| result | unshift (state_type &__state, extern_type *__to, extern_type *__to_end, extern_type *&__to_next) const |
| Reset conversion state. | |
| result | in (state_type &__state, const extern_type *__from, const extern_type *__from_end, const extern_type *&__from_next, intern_type *__to, intern_type *__to_end, intern_type *&__to_next) const |
| Convert from external to internal character set. | |
| int | encoding () const throw () |
| bool | always_noconv () const throw () |
| int | length (state_type &__state, const extern_type *__from, const extern_type *__end, size_t __max) const |
| int | max_length () const throw () |
Protected Member Functions | |
| __codecvt_abstract_base (size_t __refs=0) | |
| virtual | ~__codecvt_abstract_base () |
| virtual result | do_out (state_type &__state, const intern_type *__from, const intern_type *__from_end, const intern_type *&__from_next, extern_type *__to, extern_type *__to_end, extern_type *&__to_next) const =0 |
| Convert from internal to external character set. | |
| virtual result | do_unshift (state_type &__state, extern_type *__to, extern_type *__to_end, extern_type *&__to_next) const =0 |
| virtual result | do_in (state_type &__state, const extern_type *__from, const extern_type *__from_end, const extern_type *&__from_next, intern_type *__to, intern_type *__to_end, intern_type *&__to_next) const =0 |
| virtual int | do_encoding () const =0 throw () |
| virtual bool | do_always_noconv () const =0 throw () |
| virtual int | do_length (state_type &, const extern_type *__from, const extern_type *__end, size_t __max) const =0 |
| virtual int | do_max_length () const =0 throw () |
This template class provides implementations of the public functions that forward to the protected virtual functions.
This template also provides abstract stubs for the protected virtual functions.
Definition at line 70 of file codecvt.h.
| typedef _ExternT __codecvt_abstract_base< _InternT, _ExternT, _StateT >::extern_type |
| typedef _InternT __codecvt_abstract_base< _InternT, _ExternT, _StateT >::intern_type |
| typedef codecvt_base::result __codecvt_abstract_base< _InternT, _ExternT, _StateT >::result |
Reimplemented from codecvt_base.
Reimplemented in codecvt< _InternT, _ExternT, _StateT >, and std::codecvt< _InternT, _ExternT, encoding_state >.
| typedef _StateT __codecvt_abstract_base< _InternT, _ExternT, _StateT >::state_type |
| __codecvt_abstract_base< _InternT, _ExternT, _StateT >::__codecvt_abstract_base | ( | size_t | __refs = 0 |
) | [inline, explicit, protected] |
| virtual __codecvt_abstract_base< _InternT, _ExternT, _StateT >::~__codecvt_abstract_base | ( | ) | [inline, protected, virtual] |
| bool __codecvt_abstract_base< _InternT, _ExternT, _StateT >::always_noconv | ( | ) | const throw () [inline] |
Definition at line 212 of file codecvt.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::seekoff().
| virtual bool __codecvt_abstract_base< _InternT, _ExternT, _StateT >::do_always_noconv | ( | ) | const throw () [protected, pure virtual] |
| virtual int __codecvt_abstract_base< _InternT, _ExternT, _StateT >::do_encoding | ( | ) | const throw () [protected, pure virtual] |
| virtual result __codecvt_abstract_base< _InternT, _ExternT, _StateT >::do_in | ( | state_type & | __state, | |
| const extern_type * | __from, | |||
| const extern_type * | __from_end, | |||
| const extern_type *& | __from_next, | |||
| intern_type * | __to, | |||
| intern_type * | __to_end, | |||
| intern_type *& | __to_next | |||
| ) | const [protected, pure virtual] |
Implemented in codecvt< _InternT, _ExternT, _StateT >, and codecvt< char, char, mbstate_t >.
Referenced by __codecvt_abstract_base< _InternT, _ExternT, __gnu_cxx::encoding_state >::in().
| virtual int __codecvt_abstract_base< _InternT, _ExternT, _StateT >::do_length | ( | state_type & | , | |
| const extern_type * | __from, | |||
| const extern_type * | __end, | |||
| size_t | __max | |||
| ) | const [protected, pure virtual] |
Implemented in codecvt< _InternT, _ExternT, _StateT >, and codecvt< char, char, mbstate_t >.
Referenced by __codecvt_abstract_base< _InternT, _ExternT, __gnu_cxx::encoding_state >::length().
| virtual int __codecvt_abstract_base< _InternT, _ExternT, _StateT >::do_max_length | ( | ) | const throw () [protected, pure virtual] |
| virtual result __codecvt_abstract_base< _InternT, _ExternT, _StateT >::do_out | ( | state_type & | __state, | |
| const intern_type * | __from, | |||
| const intern_type * | __from_end, | |||
| const intern_type *& | __from_next, | |||
| extern_type * | __to, | |||
| extern_type * | __to_end, | |||
| extern_type *& | __to_next | |||
| ) | const [protected, pure virtual] |
Convert from internal to external character set.
Converts input string of intern_type to output string of extern_type. This function is a hook for derived classes to change the value returned.
Implemented in codecvt< _InternT, _ExternT, _StateT >, and codecvt< char, char, mbstate_t >.
Referenced by __codecvt_abstract_base< _InternT, _ExternT, __gnu_cxx::encoding_state >::out().
| virtual result __codecvt_abstract_base< _InternT, _ExternT, _StateT >::do_unshift | ( | state_type & | __state, | |
| extern_type * | __to, | |||
| extern_type * | __to_end, | |||
| extern_type *& | __to_next | |||
| ) | const [protected, pure virtual] |
| int __codecvt_abstract_base< _InternT, _ExternT, _StateT >::encoding | ( | ) | const throw () [inline] |
Definition at line 208 of file codecvt.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::seekoff(), and std::basic_filebuf< _CharT, _Traits >::underflow().
| result __codecvt_abstract_base< _InternT, _ExternT, _StateT >::in | ( | state_type & | __state, | |
| const extern_type * | __from, | |||
| const extern_type * | __from_end, | |||
| const extern_type *& | __from_next, | |||
| intern_type * | __to, | |||
| intern_type * | __to_end, | |||
| intern_type *& | __to_next | |||
| ) | const [inline] |
Convert from external to internal character set.
Converts input string of extern_type to output string of intern_type. This is analogous to mbsrtowcs. It does this by calling codecvt::do_in.
The source and destination character sets are determined by the facet's locale, internal and external types.
The characters in [from,from_end) are converted and written to [to,to_end). from_next and to_next are set to point to the character following the last successfully converted character, respectively. If the result needed no conversion, from_next and to_next are not affected.
The state argument should be intialized if the input is at the beginning and carried from a previous call if continuing conversion. There are no guarantees about how state is used.
The result returned is a member of codecvt_base::result. If all the input is converted, returns codecvt_base::ok. If no conversion is necessary, returns codecvt_base::noconv. If the input ends early or there is insufficient space in the output, returns codecvt_base::partial. Otherwise the conversion failed and codecvt_base::error is returned.
| state | Persistent conversion state data. | |
| from | Start of input. | |
| from_end | End of input. | |
| from_next | Returns start of unconverted data. | |
| to | Start of output buffer. | |
| to_end | End of output buffer. | |
| to_next | Returns start of unused output area. |
Definition at line 198 of file codecvt.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::underflow().
| int __codecvt_abstract_base< _InternT, _ExternT, _StateT >::length | ( | state_type & | __state, | |
| const extern_type * | __from, | |||
| const extern_type * | __end, | |||
| size_t | __max | |||
| ) | const [inline] |
Definition at line 216 of file codecvt.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::seekoff().
| int __codecvt_abstract_base< _InternT, _ExternT, _StateT >::max_length | ( | ) | const throw () [inline] |
Definition at line 221 of file codecvt.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::_M_convert_to_external(), and std::basic_filebuf< _CharT, _Traits >::underflow().
| result __codecvt_abstract_base< _InternT, _ExternT, _StateT >::out | ( | state_type & | __state, | |
| const intern_type * | __from, | |||
| const intern_type * | __from_end, | |||
| const intern_type *& | __from_next, | |||
| extern_type * | __to, | |||
| extern_type * | __to_end, | |||
| extern_type *& | __to_next | |||
| ) | const [inline] |
Convert from internal to external character set.
Converts input string of intern_type to output string of extern_type. This is analogous to wcsrtombs. It does this by calling codecvt::do_out.
The source and destination character sets are determined by the facet's locale, internal and external types.
The characters in [from,from_end) are converted and written to [to,to_end). from_next and to_next are set to point to the character following the last successfully converted character, respectively. If the result needed no conversion, from_next and to_next are not affected.
The state argument should be intialized if the input is at the beginning and carried from a previous call if continuing conversion. There are no guarantees about how state is used.
The result returned is a member of codecvt_base::result. If all the input is converted, returns codecvt_base::ok. If no conversion is necessary, returns codecvt_base::noconv. If the input ends early or there is insufficient space in the output, returns codecvt_base::partial. Otherwise the conversion failed and codecvt_base::error is returned.
| state | Persistent conversion state data. | |
| from | Start of input. | |
| from_end | End of input. | |
| from_next | Returns start of unconverted data. | |
| to | Start of output buffer. | |
| to_end | End of output buffer. | |
| to_next | Returns start of unused output area. |
Definition at line 118 of file codecvt.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::_M_convert_to_external().
| result __codecvt_abstract_base< _InternT, _ExternT, _StateT >::unshift | ( | state_type & | __state, | |
| extern_type * | __to, | |||
| extern_type * | __to_end, | |||
| extern_type *& | __to_next | |||
| ) | const [inline] |
Reset conversion state.
Writes characters to output that would restore state to initial conditions. The idea is that if a partial conversion occurs, then the converting the characters written by this function would leave the state in initial conditions, rather than partial conversion state. It does this by calling codecvt::do_unshift().
For example, if 4 external characters always converted to 1 internal character, and input to in() had 6 external characters with state saved, this function would write two characters to the output and set the state to initialized conditions.
The source and destination character sets are determined by the facet's locale, internal and external types.
The result returned is a member of codecvt_base::result. If the state could be reset and data written, returns codecvt_base::ok. If no conversion is necessary, returns codecvt_base::noconv. If the output has insufficient space, returns codecvt_base::partial. Otherwise the reset failed and codecvt_base::error is returned.
| state | Persistent conversion state data. | |
| to | Start of output buffer. | |
| to_end | End of output buffer. | |
| to_next | Returns start of unused output area. |
Definition at line 157 of file codecvt.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::_M_terminate_output().
1.4.7