| /*************************************************************************** |
| * |
| * _codecvt.h - Definitions of the code conversion facets |
| * |
| * This is an internal header file used to implement the C++ Standard |
| * Library. It should never be #included directly by a program. |
| * |
| * $Id$ |
| * |
| *************************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed |
| * with this work for additional information regarding copyright |
| * ownership. The ASF licenses this file to you under the Apache |
| * License, Version 2.0 (the "License"); you may not use this file |
| * except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| * implied. See the License for the specific language governing |
| * permissions and limitations under the License. |
| * |
| * Copyright 1994-2006 Rogue Wave Software. |
| * |
| **************************************************************************/ |
| |
| #ifndef _RWSTD_LOC_CODECVT_H_INCLUDED |
| #define _RWSTD_LOC_CODECVT_H_INCLUDED |
| |
| |
| #include <rw/_defs.h> |
| #include <loc/_facet.h> |
| #include <rw/_mbstate.h> // for _RWSTD_MBSTATE_T |
| |
| |
| _RWSTD_NAMESPACE (__rw) { |
| |
| struct __rw_ctype_t; |
| |
| } // namespace __rw |
| |
| _RWSTD_NAMESPACE (_V3_LOCALE) { |
| |
| // 22.2.1.5 - Template class codecvt |
| |
| struct codecvt_base |
| { |
| enum result { ok, partial, error, noconv }; |
| }; |
| |
| |
| _EXPORT |
| template <class _InternT, class _ExternT, class _StateT> |
| class codecvt; |
| |
| |
| #ifndef _RWSTD_NO_EXT_CODECVT_PRIMARY |
| |
| _EXPORT |
| template <class _InternT, class _ExternT, class _StateT> |
| class codecvt: public _RW::__rw_facet, |
| public codecvt_base |
| { |
| public: |
| typedef _InternT intern_type; |
| typedef _ExternT extern_type; |
| typedef _StateT state_type; |
| |
| protected: |
| |
| // extension: where reasonable, the default behavior of the primary |
| // template is the same as that of codecvt<char, char, mbstate_t> if |
| // sizeof (intern_type) == sizeof (extern_type) to allow iostream |
| // instantiations on signed char or unsigned char to have somewhat |
| // meaningful behavior |
| |
| virtual result |
| do_out (state_type&, |
| const intern_type*, const intern_type*, const intern_type*&, |
| extern_type*, extern_type*, extern_type*&) const { |
| return sizeof (intern_type) == sizeof (extern_type) ? noconv : error; |
| } |
| |
| virtual result |
| do_in (state_type&, |
| const extern_type*, const extern_type*, const extern_type*&, |
| intern_type*, intern_type*, intern_type*&) const { |
| return sizeof (intern_type) == sizeof (extern_type) ? noconv : error; |
| } |
| |
| virtual result |
| do_unshift (state_type&, extern_type*, extern_type*, extern_type*&) const { |
| return sizeof (intern_type) == sizeof (extern_type) ? noconv : error; |
| } |
| |
| virtual int do_encoding () const _THROWS (()) { |
| return -1; // unknown, possibly state dependent |
| } |
| |
| virtual bool do_always_noconv () const _THROWS (()) { |
| return sizeof (intern_type) == sizeof (extern_type); |
| } |
| |
| virtual int do_max_length () const _THROWS (()) { |
| return _RWSTD_INT_MAX; |
| } |
| |
| virtual int |
| do_length (state_type&, |
| const extern_type*, const extern_type*, _RWSTD_SIZE_T) const { |
| return _RWSTD_INT_MAX; |
| } |
| |
| public: |
| |
| _EXPLICIT codecvt (_RWSTD_SIZE_T __ref = 0): _RW::__rw_facet (__ref) { } |
| |
| // 22,2,1,5,1, p1 |
| 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_limit, |
| extern_type*& __to_next) const { |
| return do_out(__state,__from,__from_end,__from_next, |
| __to,__to_limit,__to_next); |
| } |
| |
| // 22,2,1,5,1, p2 |
| result unshift (state_type& __state, extern_type* __to, |
| extern_type* __to_limit, extern_type*& __to_next) const { |
| return do_unshift (__state,__to,__to_limit,__to_next); |
| } |
| |
| // 22,2,1,5,1, p3 |
| 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_limit, |
| intern_type*& __to_next) const { |
| return do_in (__state,__from,__from_end,__from_next, |
| __to,__to_limit,__to_next); |
| } |
| |
| // 22,2,1,5,1, p5 |
| bool always_noconv () const _THROWS (()) { |
| return do_always_noconv(); |
| } |
| |
| // 22,2,1,5,1, p4 |
| int encoding () const _THROWS (()) { |
| return do_encoding(); |
| } |
| |
| // 22,2,1,5,1, p6, lwg issue 75 |
| int length (state_type& __state, const extern_type* __from, |
| const extern_type* __end, _RWSTD_SIZE_T __maxlen) const { |
| return do_length (__state, __from, __end, __maxlen); |
| } |
| |
| // 22,2,1,5,1, p7 |
| int max_length() const _THROWS (()) { |
| return do_max_length(); |
| } |
| |
| static _RW::__rw_facet_id id; |
| |
| }; |
| |
| #endif // _RWSTD_NO_EXT_CODECVT_PRIMARY |
| |
| |
| // 22.2.1.5, p3 - performs no conversion |
| |
| _RWSTD_SPECIALIZED_CLASS |
| class _RWSTD_EXPORT codecvt<char, char, _RWSTD_MBSTATE_T> |
| : public _RW::__rw_facet, |
| public codecvt_base |
| { |
| public: |
| |
| typedef char extern_type; |
| typedef char intern_type; |
| typedef _RWSTD_MBSTATE_T state_type; |
| |
| _EXPLICIT codecvt (_RWSTD_SIZE_T __refs = 0) |
| : _RW::__rw_facet (__refs), _C_always_noconv (-1) { } |
| |
| virtual ~codecvt (); |
| |
| 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_limit, |
| extern_type *&__to_next) const { |
| return do_out (__state, __from, __from_end, __from_next, |
| __to, __to_limit, __to_next); |
| } |
| |
| result unshift (state_type &__state, |
| extern_type *__to, extern_type *__to_limit, |
| extern_type*& __to_next) const { |
| return do_unshift (__state, __to, __to_limit, __to_next); |
| } |
| |
| 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_limit, |
| intern_type *&__to_next) const { |
| return do_in (__state, __from, __from_end, __from_next, |
| __to, __to_limit, __to_next); |
| } |
| |
| int encoding () const _THROWS (()) { |
| return do_encoding (); |
| } |
| |
| bool always_noconv () const _THROWS (()); |
| |
| // signature follows lwg issue 75 |
| int length (state_type &__state, const extern_type *__from, |
| const extern_type *__end, _RWSTD_SIZE_T __maxlen) const { |
| return do_length (__state, __from, __end, __maxlen); |
| } |
| |
| int max_length () const _THROWS (()) { |
| return do_max_length (); |
| } |
| |
| static _RW::__rw_facet_id id; |
| |
| protected: |
| |
| virtual result |
| do_out (state_type&, |
| const intern_type*, const intern_type*, const intern_type*&, |
| extern_type*, extern_type*, extern_type*&) const; |
| |
| virtual result |
| do_in (state_type&, |
| const extern_type*, const extern_type*, const extern_type*&, |
| intern_type*, intern_type*, intern_type*&) const; |
| |
| // 22.2.1.5.2, p5 - stores no characters |
| virtual result |
| do_unshift (state_type&, |
| extern_type*, extern_type*, extern_type*&) const; |
| |
| virtual int do_encoding () const _THROWS (()); |
| |
| virtual bool do_always_noconv () const _THROWS (()); |
| |
| // signature follows lwg issue 75 |
| virtual int |
| do_length (state_type&, |
| const extern_type*, const extern_type*, _RWSTD_SIZE_T) const; |
| |
| virtual int do_max_length () const _THROWS (()); |
| |
| private: |
| |
| int _C_always_noconv; // cached value |
| }; |
| |
| |
| inline bool |
| codecvt<char, char, _RWSTD_MBSTATE_T>:: |
| always_noconv () const _THROWS (()) |
| { |
| // optimize away repeated calls to the virtual function |
| if (_C_always_noconv < 0) { |
| |
| // typedef works around an HP aCC x.38 bug (PR #25832) |
| typedef codecvt<char, char, _RWSTD_MBSTATE_T> _CodeCvt; |
| |
| _CodeCvt *__self = _RWSTD_CONST_CAST (_CodeCvt*, this); |
| |
| __self->_C_always_noconv = do_always_noconv (); |
| } |
| |
| return 1 == _C_always_noconv; |
| } |
| |
| |
| #ifndef _RWSTD_NO_WCHAR_T |
| |
| // 22.2.1.5, p3 - converts between wide and narrow characters |
| // of the native character set (i.e., widens and narrows) |
| |
| _RWSTD_SPECIALIZED_CLASS |
| class _RWSTD_EXPORT codecvt<wchar_t, char, _RWSTD_MBSTATE_T> |
| : public _RW::__rw_facet, |
| public codecvt_base |
| { |
| public: |
| |
| typedef wchar_t intern_type; |
| typedef char extern_type; |
| typedef _RWSTD_MBSTATE_T state_type; |
| |
| protected: |
| |
| virtual result |
| do_out (state_type&, const intern_type*, const intern_type*, |
| const intern_type*&, |
| extern_type*, extern_type*, extern_type*&) const; |
| |
| virtual result |
| do_in (state_type&, |
| const extern_type*, const extern_type*, const extern_type*&, |
| intern_type*, intern_type*, intern_type*&) const; |
| |
| // 22.2.1.5.2, p5 - stores no characters |
| virtual result |
| do_unshift (state_type&, extern_type*, extern_type*, extern_type*&) const; |
| |
| virtual bool do_always_noconv () const _THROWS (()) { |
| return false; // conversion always necessary |
| } |
| |
| virtual int do_encoding () const _THROWS (()) { |
| // 22.2.1.5.2 p6 1(ext.) <=> 1(int.) |
| return 1; |
| } |
| |
| // signature follows lwg issue 75 |
| virtual int |
| do_length (state_type&, |
| const extern_type*, const extern_type*, _RWSTD_SIZE_T) const; |
| |
| virtual int do_max_length () const _THROWS (()) { |
| return 1; |
| } |
| |
| public: |
| |
| _EXPLICIT codecvt (_RWSTD_SIZE_T = 0); |
| |
| 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_limit, |
| extern_type *& __to_next) const { |
| return do_out (__state, __from, __from_end, __from_next, __to, |
| __to_limit, __to_next); |
| } |
| |
| result unshift (state_type &__state, |
| extern_type *__to, extern_type *__to_limit, |
| extern_type *&__to_next) const { |
| return do_unshift (__state, __to, __to_limit, __to_next); |
| } |
| |
| 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_limit, |
| intern_type *&__to_next) const { |
| return do_in (__state, __from, __from_end, __from_next, |
| __to, __to_limit, __to_next); |
| } |
| |
| int encoding () const _THROWS (()) { |
| return do_encoding(); |
| } |
| |
| bool always_noconv () const _THROWS (()) { |
| return do_always_noconv (); |
| } |
| |
| // signature follows lwg issue 75 |
| int length (state_type &__state, |
| const extern_type *__from, const extern_type *__end, |
| _RWSTD_SIZE_T __maxlen) const { |
| return do_length (__state, __from, __end, __maxlen); |
| } |
| |
| int max_length () const _THROWS (()) { |
| return do_max_length (); |
| } |
| |
| static _RW::__rw_facet_id id; |
| }; |
| |
| |
| #endif // _RWSTD_NO_WCHAR_T |
| |
| |
| // 22.2.1.6 |
| template <class _InternT, class _ExternT, class _StateT> |
| class codecvt_byname: public codecvt<_InternT, _ExternT, _StateT> |
| { |
| char _C_namebuf [32]; |
| |
| public: |
| |
| typedef _InternT intern_type; |
| typedef _ExternT extern_type; |
| typedef _StateT state_type; |
| |
| _EXPLICIT codecvt_byname (const char *__name, _RWSTD_SIZE_T __ref = 0) |
| : codecvt <_InternT, _ExternT, _StateT> (__ref) { |
| this->_C_set_name (__name, _C_namebuf, sizeof _C_namebuf); |
| } |
| }; |
| |
| |
| #ifndef _RWSTD_NO_WCHAR_T |
| |
| _RWSTD_SPECIALIZED_CLASS |
| class _RWSTD_EXPORT codecvt_byname<wchar_t, char, _RWSTD_MBSTATE_T> |
| : public codecvt<wchar_t, char, _RWSTD_MBSTATE_T> |
| { |
| char _C_namebuf [32]; |
| |
| unsigned _C_flags; |
| |
| public: |
| |
| _EXPLICIT codecvt_byname (const char*, _RWSTD_SIZE_T = 0); |
| |
| protected: |
| |
| virtual codecvt_base::result |
| do_out (state_type&, |
| const intern_type*, const intern_type*, const intern_type*&, |
| extern_type*, extern_type*, extern_type*&) const; |
| |
| virtual codecvt_base::result |
| do_in (state_type&, |
| const extern_type*, const extern_type*, const extern_type*&, |
| intern_type*, intern_type*, intern_type*&) const; |
| |
| |
| virtual codecvt_base::result |
| do_unshift (state_type&, |
| extern_type*, extern_type*, extern_type*&) const; |
| |
| virtual int do_encoding () const _THROWS (()); |
| |
| // signature follows lwg issue 75 |
| virtual int |
| do_length (state_type&, const extern_type*, const extern_type*, |
| _RWSTD_SIZE_T) const; |
| |
| virtual int do_max_length () const _THROWS (()); |
| }; |
| |
| |
| #endif // _RWSTD_NO_WCHAR_T |
| |
| |
| } // namespace _V3_LOCALE |
| |
| |
| #if _RWSTD_DEFINE_TEMPLATE (_CODECVT) |
| # include <loc/_codecvt.cc> |
| #endif // _RWSTD_DEFINE_TEMPLATE (_CODECVT) |
| |
| |
| #endif // _RWSTD_LOC_CODECVT_H_INCLUDED |