570 lines
13 KiB
C++
570 lines
13 KiB
C++
// -*- C++ -*-
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// Testing character type and state type with char_traits and codecvt
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// specializations for the C++ library testsuite.
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//
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// Copyright (C) 2003-2014 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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//
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#ifndef _GLIBCXX_TESTSUITE_CHARACTER_H
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#define _GLIBCXX_TESTSUITE_CHARACTER_H
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#include <climits>
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#include <string> // for char_traits
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#include <locale> // for codecvt
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#include <algorithm> // for transform
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#include <ext/pod_char_traits.h>
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namespace __gnu_test
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{
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struct pod_int
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{
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int value;
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#if __cplusplus >= 201103L
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// For std::iota.
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pod_int&
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operator++()
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{
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++value;
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return *this;
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}
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#endif
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};
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// For 20.1 requirements for instantiable type: equality comparable
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// and less than comparable.
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inline bool
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operator==(const pod_int& lhs, const pod_int& rhs)
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{ return lhs.value == rhs.value; }
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inline bool
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operator<(const pod_int& lhs, const pod_int& rhs)
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{ return lhs.value < rhs.value; }
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// For 26 numeric algorithms requirements, need addable,
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// subtractable, multiplicable.
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inline pod_int
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operator+(const pod_int& lhs, const pod_int& rhs)
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{
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pod_int ret = { lhs.value + rhs.value };
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return ret;
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}
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inline pod_int
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operator-(const pod_int& lhs, const pod_int& rhs)
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{
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pod_int ret = { lhs.value - rhs.value };
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return ret;
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}
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inline pod_int
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operator*(const pod_int& lhs, const pod_int& rhs)
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{
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pod_int ret = { lhs.value * rhs.value };
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return ret;
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}
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struct pod_state
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{
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unsigned long value;
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};
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inline bool
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operator==(const pod_state& lhs, const pod_state& rhs)
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{ return lhs.value == rhs.value; }
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inline bool
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operator<(const pod_state& lhs, const pod_state& rhs)
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{ return lhs.value < rhs.value; }
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// Alternate character types.
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using __gnu_cxx::character;
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typedef character<unsigned char, pod_int, pod_state> pod_char;
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typedef character<unsigned char, unsigned int, pod_state> pod_uchar;
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typedef character<unsigned short, unsigned int> pod_ushort;
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typedef character<unsigned int, unsigned long> pod_uint;
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}
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namespace __gnu_cxx
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{
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// Specializations.
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// pod_char
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template<>
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template<typename V2>
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inline __gnu_test::pod_char::char_type
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__gnu_test::pod_char::char_type::from(const V2& v)
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{
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char_type ret = { static_cast<value_type>(v.value) };
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return ret;
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}
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template<>
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template<typename V2>
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inline V2
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__gnu_test::pod_char::char_type::to(const char_type& c)
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{
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V2 ret = { c.value };
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return ret;
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}
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template<>
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template<typename V2>
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inline __gnu_test::pod_uchar::char_type
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__gnu_test::pod_uchar::char_type::from(const V2& v)
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{
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char_type ret;
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ret.value = (v >> 5);
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return ret;
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}
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template<>
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template<typename V2>
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inline V2
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__gnu_test::pod_uchar::char_type::to(const char_type& c)
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{ return static_cast<V2>(c.value << 5); }
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} // namespace __gnu_test
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namespace std
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{
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// codecvt specialization
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//
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// The conversion performed by the specialization is not supposed to
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// be useful, rather it has been designed to demonstrate the
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// essential features of stateful conversions:
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// * Number and value of bytes for each internal character depends on the
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// state in addition to the character itself.
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// * Unshift produces an unshift sequence and resets the state. On input
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// the unshift sequence causes the state to be reset.
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//
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// The conversion for output is as follows:
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// 1. Calculate the value tmp by xor-ing the state and the internal
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// character
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// 2. Split tmp into either two or three bytes depending on the value of
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// state. Output those bytes.
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// 3. tmp becomes the new value of state.
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template<>
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class codecvt<__gnu_test::pod_uchar, char, __gnu_test::pod_state>
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: public __codecvt_abstract_base<__gnu_test::pod_uchar, char,
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__gnu_test::pod_state>
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{
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public:
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typedef codecvt_base::result result;
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typedef __gnu_test::pod_uchar intern_type;
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typedef char extern_type;
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typedef __gnu_test::pod_state state_type;
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typedef __codecvt_abstract_base<intern_type, extern_type, state_type>
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base_type;
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explicit codecvt(size_t refs = 0) : base_type(refs)
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{ }
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static locale::id id;
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protected:
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~codecvt()
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{ }
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virtual result
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do_out(state_type& state, const intern_type* from,
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const intern_type* from_end, const intern_type*& from_next,
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extern_type* to, extern_type* to_limit,
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extern_type*& to_next) const
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{
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while (from < from_end && to < to_limit)
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{
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unsigned char tmp = (state.value ^ from->value);
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if (state.value & 0x8)
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{
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if (to >= to_limit - 2)
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break;
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*to++ = (tmp & 0x7);
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*to++ = ((tmp >> 3) & 0x7);
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*to++ = ((tmp >> 6) & 0x3);
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}
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else
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{
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if (to >= to_limit - 1)
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break;
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*to++ = (tmp & 0xf);
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*to++ = ((tmp >> 4) & 0xf);
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}
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state.value = tmp;
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++from;
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}
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from_next = from;
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to_next = to;
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return (from < from_end) ? partial : ok;
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}
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virtual result
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do_in(state_type& state, const extern_type* from,
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const extern_type* from_end, const extern_type*& from_next,
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intern_type* to, intern_type* to_limit,
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intern_type*& to_next) const
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{
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while (from < from_end && to < to_limit)
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{
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unsigned char c = *from;
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if (c & 0xc0)
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{
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// Unshift sequence
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state.value &= c;
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++from;
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continue;
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}
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unsigned char tmp;
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if (state.value & 0x8)
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{
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if (from >= from_end - 2)
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break;
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tmp = (*from++ & 0x7);
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tmp |= ((*from++ << 3) & 0x38);
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tmp |= ((*from++ << 6) & 0xc0);
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}
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else
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{
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if (from >= from_end - 1)
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break;
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tmp = (*from++ & 0xf);
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tmp |= ((*from++ << 4) & 0xf0);
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}
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to->value = (tmp ^ state.value);
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state.value = tmp;
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++to;
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}
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from_next = from;
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to_next = to;
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return (from < from_end) ? partial : ok;
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}
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virtual result
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do_unshift(state_type& state, extern_type* to, extern_type* to_limit,
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extern_type*& to_next) const
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{
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for (unsigned int i = 0; i < CHAR_BIT; ++i)
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{
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unsigned int mask = (1 << i);
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if (state.value & mask)
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{
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if (to == to_limit)
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{
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to_next = to;
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return partial;
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}
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state.value &= ~mask;
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*to++ = static_cast<unsigned char>(~mask);
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}
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}
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to_next = to;
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return state.value == 0 ? ok : error;
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}
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virtual int
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do_encoding() const throw()
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{ return -1; }
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virtual bool
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do_always_noconv() const throw()
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{ return false; }
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virtual int
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do_length(state_type& state, const extern_type* from,
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const extern_type* end, size_t max) const
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{
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const extern_type* beg = from;
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while (from < end)
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{
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unsigned char c = *from;
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if (c & 0xc0)
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{
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// Unshift sequence
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state.value &= c;
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++from;
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continue;
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}
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if (max == 0) break;
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unsigned char tmp;
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if (state.value & 0x8)
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{
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if (from >= end - 2)
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break;
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tmp = (*from++ & 0x7);
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tmp |= ((*from++ << 3) & 0x38);
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tmp |= ((*from++ << 6) & 0xc0);
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}
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else
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{
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if (from >= end - 1)
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break;
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tmp = (*from++ & 0xf);
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tmp |= ((*from++ << 4) & 0xf0);
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}
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state.value = tmp;
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--max;
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}
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return from - beg;
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}
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// Maximum 8 bytes unshift sequence followed by max 3 bytes for
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// one character.
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virtual int
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do_max_length() const throw()
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{ return 11; }
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};
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template<>
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class ctype<__gnu_test::pod_uchar>
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: public __ctype_abstract_base<__gnu_test::pod_uchar>
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{
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public:
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typedef __gnu_test::pod_uchar char_type;
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explicit ctype(size_t refs = 0)
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: __ctype_abstract_base<__gnu_test::pod_uchar>(refs) { }
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static locale::id id;
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protected:
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~ctype()
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{ }
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virtual bool
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do_is(mask, char_type) const
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{ return false; }
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virtual const char_type*
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do_is(const char_type* low, const char_type* high, mask* vec) const
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{
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fill_n(vec, high - low, mask());
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return high;
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}
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virtual const char_type*
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do_scan_is(mask, const char_type*, const char_type* high) const
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{ return high; }
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virtual const char_type*
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do_scan_not(mask, const char_type* low, const char_type*) const
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{ return low; }
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virtual char_type
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do_toupper(char_type c) const
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{ return c; }
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virtual const char_type*
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do_toupper(char_type*, const char_type* high) const
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{ return high; }
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virtual char_type
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do_tolower(char_type c) const
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{ return c; }
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virtual const char_type*
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do_tolower(char_type*, const char_type* high) const
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{ return high; }
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virtual char_type
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do_widen(char c) const
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{ return __gnu_test::pod_uchar::from<char>(c); }
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virtual const char*
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do_widen(const char* low, const char* high, char_type* dest) const
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{
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transform(low, high, dest, &__gnu_test::pod_uchar::from<char>);
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return high;
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}
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virtual char
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do_narrow(char_type, char dfault) const
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{ return dfault; }
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virtual const char_type*
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do_narrow(const char_type* low, const char_type* high,
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char dfault, char* dest) const
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{
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fill_n(dest, high - low, dfault);
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return high;
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}
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};
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// numpunct specializations
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template<>
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class numpunct<__gnu_test::pod_uint>
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: public locale::facet
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{
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public:
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typedef __gnu_test::pod_uint char_type;
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typedef basic_string<char_type> string_type;
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static locale::id id;
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explicit
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numpunct(size_t refs = 0)
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: locale::facet(refs)
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{ }
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char_type
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decimal_point() const
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{ return this->do_decimal_point(); }
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char_type
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thousands_sep() const
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{ return this->do_thousands_sep(); }
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string
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grouping() const
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{ return this->do_grouping(); }
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string_type
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truename() const
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{ return this->do_truename(); }
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string_type
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falsename() const
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{ return this->do_falsename(); }
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protected:
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~numpunct()
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{ }
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virtual char_type
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do_decimal_point() const
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{ return char_type(); }
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virtual char_type
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do_thousands_sep() const
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{ return char_type(); }
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virtual string
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do_grouping() const
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{ return string(); }
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virtual string_type
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do_truename() const
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{ return string_type(); }
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virtual string_type
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do_falsename() const
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{ return string_type(); }
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};
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template<>
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class moneypunct<__gnu_test::pod_uint>
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: public locale::facet, public money_base
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{
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public:
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typedef __gnu_test::pod_uint char_type;
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typedef basic_string<char_type> string_type;
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static locale::id id;
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static const bool intl = false;
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explicit
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moneypunct(size_t refs = 0)
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: locale::facet(refs)
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{ }
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char_type
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decimal_point() const
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{ return this->do_decimal_point(); }
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char_type
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thousands_sep() const
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{ return this->do_thousands_sep(); }
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string
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grouping() const
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{ return this->do_grouping(); }
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string_type
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curr_symbol() const
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{ return this->do_curr_symbol(); }
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string_type
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positive_sign() const
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{ return this->do_positive_sign(); }
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string_type
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negative_sign() const
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{ return this->do_negative_sign(); }
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int
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frac_digits() const
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{ return this->do_frac_digits(); }
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pattern
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pos_format() const
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{ return this->do_pos_format(); }
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pattern
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neg_format() const
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{ return this->do_neg_format(); }
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protected:
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~moneypunct()
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{ }
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virtual char_type
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do_decimal_point() const
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{ return char_type(); }
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virtual char_type
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do_thousands_sep() const
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{ return char_type(); }
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virtual string
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do_grouping() const
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{ return string(); }
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virtual string_type
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do_curr_symbol() const
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{ return string_type(); }
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string_type
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do_positive_sign() const
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{ return string_type(); }
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string_type
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do_negative_sign() const
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{ return string_type(); }
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int
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do_frac_digits() const
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{ return 0; }
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pattern
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do_pos_format() const
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{ return pattern(); }
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pattern
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do_neg_format() const
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{ return pattern(); }
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};
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} // namespace std
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#endif // _GLIBCXX_TESTSUITE_CHARACTER_H
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