1 // std::ctype implementation details, newlib version -*- C++ -*-
3 // Copyright (C) 2011-2021 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
26 // ISO C++ 14882: 22.2.1.1.2 ctype virtual functions.
34 namespace std
_GLIBCXX_VISIBILITY(default)
36 _GLIBCXX_BEGIN_NAMESPACE_VERSION
38 // NB: The other ctype<char> specializations are in src/locale.cc and
39 // various /config/os/* files.
40 ctype_byname
<char>::ctype_byname(const char* __s
, size_t __refs
)
41 : ctype
<char>(0, false, __refs
)
43 if (std::strcmp(__s
, "C") != 0 && std::strcmp(__s
, "POSIX") != 0)
45 this->_S_destroy_c_locale(this->_M_c_locale_ctype
);
46 this->_S_create_c_locale(this->_M_c_locale_ctype
, __s
);
50 ctype_byname
<char>::~ctype_byname()
53 #ifdef _GLIBCXX_USE_WCHAR_T
54 ctype
<wchar_t>::__wmask_type
55 ctype
<wchar_t>::_M_convert_to_wmask(const mask __m
) const throw()
61 __ret
= wctype("space");
64 __ret
= wctype("print");
67 __ret
= wctype("cntrl");
70 __ret
= wctype("upper");
73 __ret
= wctype("lower");
76 __ret
= wctype("alpha");
79 __ret
= wctype("digit");
82 __ret
= wctype("punct");
85 __ret
= wctype("xdigit");
88 __ret
= wctype("alnum");
91 __ret
= wctype("graph");
94 // Different from the generic version, xdigit and print in
95 // newlib are defined as bitwise-OR result of bitmasks:
97 // print = _P | _U | _L | _N | _B;
98 // in which _X and _B don't correspond to any ctype mask.
99 // In order to get the wmask correctly converted when __m is
100 // equal to _X or _B, the two cases are specifically handled
103 __ret
= wctype("xdigit");
104 else if (__m
& print
)
105 __ret
= wctype("print");
107 __ret
= __wmask_type();
113 ctype
<wchar_t>::do_toupper(wchar_t __c
) const
114 { return towupper(__c
); }
117 ctype
<wchar_t>::do_toupper(wchar_t* __lo
, const wchar_t* __hi
) const
121 *__lo
= towupper(*__lo
);
128 ctype
<wchar_t>::do_tolower(wchar_t __c
) const
129 { return towlower(__c
); }
132 ctype
<wchar_t>::do_tolower(wchar_t* __lo
, const wchar_t* __hi
) const
136 *__lo
= towlower(*__lo
);
144 do_is(mask __m
, wchar_t __c
) const
147 // Newlib C library has a compact encoding that uses 8 bits only.
148 const size_t __bitmasksize
= 7;
149 for (size_t __bitcur
= 0; __bitcur
<= __bitmasksize
; ++__bitcur
)
150 if (__m
& _M_bit
[__bitcur
]
151 && iswctype(__c
, _M_wmask
[__bitcur
]))
161 do_is(const wchar_t* __lo
, const wchar_t* __hi
, mask
* __vec
) const
163 for (; __lo
< __hi
; ++__vec
, ++__lo
)
165 // Newlib C library has a compact encoding that uses 8 bits only.
166 const size_t __bitmasksize
= 7;
168 for (size_t __bitcur
= 0; __bitcur
<= __bitmasksize
; ++__bitcur
)
169 if (iswctype(*__lo
, _M_wmask
[__bitcur
]))
170 __m
|= _M_bit
[__bitcur
];
178 do_scan_is(mask __m
, const wchar_t* __lo
, const wchar_t* __hi
) const
180 while (__lo
< __hi
&& !this->do_is(__m
, *__lo
))
187 do_scan_not(mask __m
, const char_type
* __lo
, const char_type
* __hi
) const
189 while (__lo
< __hi
&& this->do_is(__m
, *__lo
) != 0)
196 do_widen(char __c
) const
197 { return _M_widen
[static_cast<unsigned char>(__c
)]; }
201 do_widen(const char* __lo
, const char* __hi
, wchar_t* __dest
) const
205 *__dest
= _M_widen
[static_cast<unsigned char>(*__lo
)];
214 do_narrow(wchar_t __wc
, char __dfault
) const
216 if (__wc
>= 0 && __wc
< 128 && _M_narrow_ok
)
217 return _M_narrow
[__wc
];
218 const int __c
= wctob(__wc
);
219 return (__c
== EOF
? __dfault
: static_cast<char>(__c
));
224 do_narrow(const wchar_t* __lo
, const wchar_t* __hi
, char __dfault
,
230 if (*__lo
>= 0 && *__lo
< 128)
231 *__dest
= _M_narrow
[*__lo
];
234 const int __c
= wctob(*__lo
);
235 *__dest
= (__c
== EOF
? __dfault
: static_cast<char>(__c
));
243 const int __c
= wctob(*__lo
);
244 *__dest
= (__c
== EOF
? __dfault
: static_cast<char>(__c
));
252 ctype
<wchar_t>::_M_initialize_ctype() throw()
255 for (__i
= 0; __i
< 128; ++__i
)
257 const int __c
= wctob(__i
);
261 _M_narrow
[__i
] = static_cast<char>(__c
);
266 _M_narrow_ok
= false;
268 __i
< sizeof(_M_widen
) / sizeof(wint_t); ++__i
)
269 _M_widen
[__i
] = btowc(__i
);
271 for (size_t __i
= 0; __i
<= 7; ++__i
)
273 _M_bit
[__i
] = static_cast<mask
>(1 << __i
);
274 _M_wmask
[__i
] = _M_convert_to_wmask(_M_bit
[__i
]);
277 #endif // _GLIBCXX_USE_WCHAR_T
279 _GLIBCXX_END_NAMESPACE_VERSION