зеркало из https://github.com/microsoft/STL.git
194 строки
8.7 KiB
C++
194 строки
8.7 KiB
C++
// codecvt facet for multibyte code as EBCDIC
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// Copyright (c) Microsoft Corporation.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#pragma once
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#ifndef _CVT_EBCDIC_
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#define _CVT_EBCDIC_
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#include <yvals_core.h>
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#if _STL_COMPILER_PREPROCESSOR
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#include <cwchar>
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#include <locale>
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#pragma pack(push, _CRT_PACKING)
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#pragma warning(push, _STL_WARNING_LEVEL)
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#pragma warning(disable : _STL_DISABLED_WARNINGS)
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_STL_DISABLE_CLANG_WARNINGS
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#pragma push_macro("new")
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#undef new
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namespace stdext {
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namespace cvt {
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using _Statype = _CSTD mbstate_t;
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// CLASS TEMPLATE codecvt_ebcdic
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template <class _Elem, unsigned char _Maxcode = 0xff>
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class codecvt_ebcdic
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: public _STD
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codecvt<_Elem, char, _Statype> { // facet for converting between ISO-8859-1 _Elem and EBCDIC bytes
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static const unsigned char _Atoe[0x100];
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static const unsigned char _Etoa[0x100];
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public:
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using _Mybase = _STD codecvt<_Elem, char, _Statype>;
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using result = typename _Mybase::result;
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using _Byte = char;
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using intern_type = _Elem;
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using extern_type = _Byte;
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using state_type = _Statype;
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explicit codecvt_ebcdic(size_t _Refs = 0) : _Mybase(_Refs) {}
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virtual ~codecvt_ebcdic() noexcept {}
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protected:
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virtual result do_in(_Statype&, const _Byte* _First1, const _Byte* _Last1, const _Byte*& _Mid1,
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_Elem* _First2, _Elem* _Last2, _Elem*& _Mid2) const override {
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// convert bytes [_First1, _Last1) to [_First2, _Last)
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_Mid1 = _First1;
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_Mid2 = _First2;
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while (_Mid1 != _Last1 && _Mid2 != _Last2) { // convert a multibyte sequence
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unsigned char _Ch = _Etoa[static_cast<unsigned char>(*_Mid1++)];
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if (_Maxcode < _Ch) {
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return _Mybase::error; // code too large
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}
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*_Mid2++ = static_cast<_Elem>(_Ch);
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}
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return _First1 == _Mid1 ? _Mybase::partial : _Mybase::ok;
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}
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virtual result do_out(_Statype&, const _Elem* _First1, const _Elem* _Last1, const _Elem*& _Mid1,
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_Byte* _First2, _Byte* _Last2, _Byte*& _Mid2) const override {
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// convert [_First1, _Last1) to bytes [_First2, _Last)
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_Mid1 = _First1;
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_Mid2 = _First2;
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while (_Mid1 != _Last1 && _Mid2 != _Last2) { // convert and put a wide char
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unsigned char _Ch = static_cast<unsigned char>(*_Mid1++);
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if (_Maxcode < _Ch) {
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return _Mybase::error;
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}
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*_Mid2++ = static_cast<_Byte>(_Atoe[_Ch]);
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}
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return _First1 == _Mid1 ? _Mybase::partial : _Mybase::ok;
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}
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virtual result do_unshift(_Statype&, _Byte* _First2, _Byte*, _Byte*& _Mid2) const override {
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// generate bytes to return to default shift state
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_Mid2 = _First2;
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return _Mybase::ok;
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}
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virtual int do_length(
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_Statype&, const _Byte* _First1, const _Byte* _Last1, size_t _Count) const noexcept override {
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// return min(_Count, converted length of bytes [_First1, _Last1))
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const auto _Wchars = static_cast<size_t>(_Last1 - _First1);
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return static_cast<int>(_Count < _Wchars ? _Count : _Wchars);
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}
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virtual bool do_always_noconv() const noexcept override { // return true if conversions never change input
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return false;
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}
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virtual int do_max_length() const noexcept override { // return maximum length required for a conversion
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return 1;
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}
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virtual int do_encoding() const noexcept override { // return length of code sequence (from codecvt)
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return 1;
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}
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};
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// map EBCDIC to ASCII
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template <class _Elem, unsigned char _Maxcode>
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const unsigned char codecvt_ebcdic<_Elem, _Maxcode>::_Etoa[0x100] = {
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0x00, 0x01, 0x02, 0x03, 0x9c, 0x09, 0x86, 0x7f, // 00
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0x97, 0x8d, 0x8e, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, //
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0x10, 0x11, 0x12, 0x13, 0x9d, 0x85, 0x08, 0x87, //
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0x18, 0x19, 0x92, 0x8f, 0x1c, 0x1d, 0x1e, 0x1f, //
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0x80, 0x81, 0x82, 0x83, 0x84, 0x0a, 0x17, 0x1b, // 20
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0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07, //
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0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04, //
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0x98, 0x99, 0x9a, 0x9b, 0x14, 0x15, 0x9e, 0x1a, //
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0x20, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, // 40
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0xa7, 0xa8, 0xd5, 0x2e, 0x3c, 0x28, 0x2b, 0x7c, //
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0x26, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, //
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0xb0, 0xb1, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e, //
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0x2d, 0x2f, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, // 60
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0xb8, 0xb9, 0xe5, 0x2c, 0x25, 0x5f, 0x3e, 0x3f, //
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0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, //
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0xc2, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22, //
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0xc3, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, // 80
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0x68, 0x69, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, //
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0xca, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, //
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0x71, 0x72, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, //
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0xd1, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, // a0
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0x79, 0x7a, 0xd2, 0xd3, 0xd4, 0x5b, 0xd6, 0xd7, //
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0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, //
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0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0x5d, 0xe6, 0xe7, //
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0x7b, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, // c0
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0x48, 0x49, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, //
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0x7d, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, //
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0x51, 0x52, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, //
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0x5c, 0x9f, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, // e0
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0x59, 0x5a, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, //
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, //
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0x38, 0x39, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, //
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};
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// map ASCII to EBCDIC
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template <class _Elem, unsigned char _Maxcode>
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const unsigned char codecvt_ebcdic<_Elem, _Maxcode>::_Atoe[0x100] = {
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0x00, 0x01, 0x02, 0x03, 0x37, 0x2d, 0x2e, 0x2f, // 00
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0x16, 0x05, 0x25, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, //
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0x10, 0x11, 0x12, 0x13, 0x3c, 0x3d, 0x32, 0x26, //
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0x18, 0x19, 0x3f, 0x27, 0x1c, 0x1d, 0x1e, 0x1f, //
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0x40, 0x5a, 0x7f, 0x7b, 0x5b, 0x6c, 0x50, 0x7d, // 20
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0x4d, 0x5d, 0x5c, 0x4e, 0x6b, 0x60, 0x4b, 0x61, //
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0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, //
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0xf8, 0xf9, 0x7a, 0x5e, 0x4c, 0x7e, 0x6e, 0x6f, //
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0x7c, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, // 40
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0xc8, 0xc9, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, //
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0xd7, 0xd8, 0xd9, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, //
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0xe7, 0xe8, 0xe9, 0xad, 0xe0, 0xbd, 0x5f, 0x6d, //
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0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, // 60
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0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, //
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0x97, 0x98, 0x99, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, //
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0xa7, 0xa8, 0xa9, 0xc0, 0x4f, 0xd0, 0xa1, 0x07, //
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0x20, 0x21, 0x22, 0x23, 0x24, 0x15, 0x06, 0x17, // 80
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0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x09, 0x0a, 0x1b, //
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0x30, 0x31, 0x1a, 0x33, 0x34, 0x35, 0x36, 0x08, //
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0x38, 0x39, 0x3a, 0x3b, 0x04, 0x14, 0x3e, 0xe1, //
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0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, // a0
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0x49, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, //
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0x58, 0x59, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, //
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0x68, 0x69, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, //
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0x76, 0x77, 0x78, 0x80, 0x8a, 0x8b, 0x8c, 0x8d, // c0
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0x8e, 0x8f, 0x90, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, //
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0x9f, 0xa0, 0xaa, 0xab, 0xac, 0x4a, 0xae, 0xaf, //
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0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, //
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0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0x6a, 0xbe, 0xbf, // eo
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0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xda, 0xdb, //
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0xdc, 0xdd, 0xde, 0xdf, 0xea, 0xeb, 0xec, 0xed, //
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0xee, 0xef, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, //
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};
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} // namespace cvt
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} // namespace stdext
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#pragma pop_macro("new")
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_STL_RESTORE_CLANG_WARNINGS
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#pragma warning(pop)
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#pragma pack(pop)
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#endif // _STL_COMPILER_PREPROCESSOR
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#endif // _CVT_EBCDIC_
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