1 // std::ctype implementation details, generic version -*- C++ -*-
3 // Copyright (C) 2001-2020 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.
29 // Written by Benjamin Kosnik <bkoz@redhat.com>
36 namespace std
_GLIBCXX_VISIBILITY(default)
38 _GLIBCXX_BEGIN_NAMESPACE_VERSION
40 // NB: The other ctype<char> specializations are in src/locale.cc and
41 // various /config/os/* files.
42 ctype_byname
<char>::ctype_byname(const char* __s
, size_t __refs
)
43 : ctype
<char>(0, false, __refs
)
45 if (std::strcmp(__s
, "C") != 0 && std::strcmp(__s
, "POSIX") != 0)
47 this->_S_destroy_c_locale(this->_M_c_locale_ctype
);
48 this->_S_create_c_locale(this->_M_c_locale_ctype
, __s
);
52 ctype_byname
<char>::~ctype_byname()
55 #ifdef _GLIBCXX_USE_WCHAR_T
56 ctype
<wchar_t>::__wmask_type
57 ctype
<wchar_t>::_M_convert_to_wmask(const mask __m
) const throw()
63 __ret
= wctype("space");
66 __ret
= wctype("print");
69 __ret
= wctype("cntrl");
72 __ret
= wctype("upper");
75 __ret
= wctype("lower");
78 __ret
= wctype("alpha");
81 __ret
= wctype("digit");
84 __ret
= wctype("punct");
87 __ret
= wctype("xdigit");
90 __ret
= wctype("alnum");
93 __ret
= wctype("graph");
96 // For some targets ctype_base::blank == ctype_base::space so check
97 // here to avoid a duplicate case error.
99 __ret
= wctype("blank");
101 __ret
= __wmask_type();
107 ctype
<wchar_t>::do_toupper(wchar_t __c
) const
108 { return towupper(__c
); }
111 ctype
<wchar_t>::do_toupper(wchar_t* __lo
, const wchar_t* __hi
) const
115 *__lo
= towupper(*__lo
);
122 ctype
<wchar_t>::do_tolower(wchar_t __c
) const
123 { return towlower(__c
); }
126 ctype
<wchar_t>::do_tolower(wchar_t* __lo
, const wchar_t* __hi
) const
130 *__lo
= towlower(*__lo
);
138 do_is(mask __m
, char_type __c
) const
141 // Generically, 15 (instead of 11) since we don't know the numerical
142 // encoding of the various categories in /usr/include/ctype.h.
143 const size_t __bitmasksize
= 15;
144 for (size_t __bitcur
= 0; __bitcur
<= __bitmasksize
; ++__bitcur
)
145 if (__m
& _M_bit
[__bitcur
]
146 && iswctype(__c
, _M_wmask
[__bitcur
]))
156 do_is(const wchar_t* __lo
, const wchar_t* __hi
, mask
* __vec
) const
158 for (;__lo
< __hi
; ++__vec
, ++__lo
)
160 // Generically, 15 (instead of 11) since we don't know the numerical
161 // encoding of the various categories in /usr/include/ctype.h.
162 const size_t __bitmasksize
= 15;
164 for (size_t __bitcur
= 0; __bitcur
<= __bitmasksize
; ++__bitcur
)
165 if (iswctype(*__lo
, _M_wmask
[__bitcur
]))
166 __m
|= _M_bit
[__bitcur
];
174 do_scan_is(mask __m
, const wchar_t* __lo
, const wchar_t* __hi
) const
176 while (__lo
< __hi
&& !this->do_is(__m
, *__lo
))
183 do_scan_not(mask __m
, const char_type
* __lo
, const char_type
* __hi
) const
185 while (__lo
< __hi
&& this->do_is(__m
, *__lo
) != 0)
192 do_widen(char __c
) const
193 { return _M_widen
[static_cast<unsigned char>(__c
)]; }
197 do_widen(const char* __lo
, const char* __hi
, wchar_t* __dest
) const
201 *__dest
= _M_widen
[static_cast<unsigned char>(*__lo
)];
210 do_narrow(wchar_t __wc
, char __dfault
) const
212 if (__wc
>= 0 && __wc
< 128 && _M_narrow_ok
)
213 return _M_narrow
[__wc
];
214 const int __c
= wctob(__wc
);
215 return (__c
== EOF
? __dfault
: static_cast<char>(__c
));
220 do_narrow(const wchar_t* __lo
, const wchar_t* __hi
, char __dfault
,
226 if (*__lo
>= 0 && *__lo
< 128)
227 *__dest
= _M_narrow
[*__lo
];
230 const int __c
= wctob(*__lo
);
231 *__dest
= (__c
== EOF
? __dfault
: static_cast<char>(__c
));
239 const int __c
= wctob(*__lo
);
240 *__dest
= (__c
== EOF
? __dfault
: static_cast<char>(__c
));
248 ctype
<wchar_t>::_M_initialize_ctype() throw()
251 for (__i
= 0; __i
< 128; ++__i
)
253 const int __c
= wctob(__i
);
257 _M_narrow
[__i
] = static_cast<char>(__c
);
262 _M_narrow_ok
= false;
264 __i
< sizeof(_M_widen
) / sizeof(wint_t); ++__i
)
265 _M_widen
[__i
] = btowc(__i
);
267 for (size_t __i
= 0; __i
<= 15; ++__i
)
269 _M_bit
[__i
] = static_cast<mask
>(1 << __i
);
270 _M_wmask
[__i
] = _M_convert_to_wmask(_M_bit
[__i
]);
273 #endif // _GLIBCXX_USE_WCHAR_T
275 _GLIBCXX_END_NAMESPACE_VERSION