1 // std::ctype implementation details, GNU version -*- C++ -*-
3 // Copyright (C) 2001-2014 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>
33 #include <bits/c++locale_internal.h>
35 namespace std
_GLIBCXX_VISIBILITY(default)
37 _GLIBCXX_BEGIN_NAMESPACE_VERSION
39 // NB: The other ctype<char> specializations are in src/locale.cc and
40 // various /config/os/* files.
41 ctype_byname
<char>::ctype_byname(const char* __s
, size_t __refs
)
42 : ctype
<char>(0, false, __refs
)
44 if (std::strcmp(__s
, "C") != 0 && std::strcmp(__s
, "POSIX") != 0)
46 this->_S_destroy_c_locale(this->_M_c_locale_ctype
);
47 this->_S_create_c_locale(this->_M_c_locale_ctype
, __s
);
48 this->_M_toupper
= this->_M_c_locale_ctype
->__ctype_toupper
;
49 this->_M_tolower
= this->_M_c_locale_ctype
->__ctype_tolower
;
50 this->_M_table
= this->_M_c_locale_ctype
->__ctype_b
;
54 ctype_byname
<char>::~ctype_byname()
57 #ifdef _GLIBCXX_USE_WCHAR_T
58 ctype
<wchar_t>::__wmask_type
59 ctype
<wchar_t>::_M_convert_to_wmask(const mask __m
) const throw()
65 __ret
= __wctype_l("space", _M_c_locale_ctype
);
68 __ret
= __wctype_l("print", _M_c_locale_ctype
);
71 __ret
= __wctype_l("cntrl", _M_c_locale_ctype
);
74 __ret
= __wctype_l("upper", _M_c_locale_ctype
);
77 __ret
= __wctype_l("lower", _M_c_locale_ctype
);
80 __ret
= __wctype_l("alpha", _M_c_locale_ctype
);
83 __ret
= __wctype_l("digit", _M_c_locale_ctype
);
86 __ret
= __wctype_l("punct", _M_c_locale_ctype
);
89 __ret
= __wctype_l("xdigit", _M_c_locale_ctype
);
92 __ret
= __wctype_l("alnum", _M_c_locale_ctype
);
95 __ret
= __wctype_l("graph", _M_c_locale_ctype
);
98 __ret
= __wctype_l("blank", _M_c_locale_ctype
);
101 __ret
= __wmask_type();
107 ctype
<wchar_t>::do_toupper(wchar_t __c
) const
108 { return __towupper_l(__c
, _M_c_locale_ctype
); }
111 ctype
<wchar_t>::do_toupper(wchar_t* __lo
, const wchar_t* __hi
) const
115 *__lo
= __towupper_l(*__lo
, _M_c_locale_ctype
);
122 ctype
<wchar_t>::do_tolower(wchar_t __c
) const
123 { return __towlower_l(__c
, _M_c_locale_ctype
); }
126 ctype
<wchar_t>::do_tolower(wchar_t* __lo
, const wchar_t* __hi
) const
130 *__lo
= __towlower_l(*__lo
, _M_c_locale_ctype
);
138 do_is(mask __m
, wchar_t __c
) const
140 // The case of __m == ctype_base::space is particularly important,
141 // due to its use in many istream functions. Therefore we deal with
142 // it first, exploiting the knowledge that on GNU systems _M_bit[5]
143 // is the mask corresponding to ctype_base::space. NB: an encoding
144 // change would not affect correctness!
146 if (__m
== _M_bit
[5])
147 __ret
= __iswctype_l(__c
, _M_wmask
[5], _M_c_locale_ctype
);
150 // Highest bitmask in ctype_base == 11
151 const size_t __bitmasksize
= 11;
152 for (size_t __bitcur
= 0; __bitcur
<= __bitmasksize
; ++__bitcur
)
153 if (__m
& _M_bit
[__bitcur
])
155 if (__iswctype_l(__c
, _M_wmask
[__bitcur
], _M_c_locale_ctype
))
160 else if (__m
== _M_bit
[__bitcur
])
169 do_is(const wchar_t* __lo
, const wchar_t* __hi
, mask
* __vec
) const
171 for (; __lo
< __hi
; ++__vec
, ++__lo
)
173 // Highest bitmask in ctype_base == 11
174 const size_t __bitmasksize
= 11;
176 for (size_t __bitcur
= 0; __bitcur
<= __bitmasksize
; ++__bitcur
)
177 if (__iswctype_l(*__lo
, _M_wmask
[__bitcur
], _M_c_locale_ctype
))
178 __m
|= _M_bit
[__bitcur
];
186 do_scan_is(mask __m
, const wchar_t* __lo
, const wchar_t* __hi
) const
188 while (__lo
< __hi
&& !this->do_is(__m
, *__lo
))
195 do_scan_not(mask __m
, const char_type
* __lo
, const char_type
* __hi
) const
197 while (__lo
< __hi
&& this->do_is(__m
, *__lo
) != 0)
204 do_widen(char __c
) const
205 { return _M_widen
[static_cast<unsigned char>(__c
)]; }
209 do_widen(const char* __lo
, const char* __hi
, wchar_t* __dest
) const
213 *__dest
= _M_widen
[static_cast<unsigned char>(*__lo
)];
222 do_narrow(wchar_t __wc
, char __dfault
) const
224 if (__wc
>= 0 && __wc
< 128 && _M_narrow_ok
)
225 return _M_narrow
[__wc
];
226 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
227 __c_locale __old
= __uselocale(_M_c_locale_ctype
);
229 const int __c
= wctob(__wc
);
230 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
233 return (__c
== EOF
? __dfault
: static_cast<char>(__c
));
238 do_narrow(const wchar_t* __lo
, const wchar_t* __hi
, char __dfault
,
241 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
242 __c_locale __old
= __uselocale(_M_c_locale_ctype
);
247 if (*__lo
>= 0 && *__lo
< 128)
248 *__dest
= _M_narrow
[*__lo
];
251 const int __c
= wctob(*__lo
);
252 *__dest
= (__c
== EOF
? __dfault
: static_cast<char>(__c
));
260 const int __c
= wctob(*__lo
);
261 *__dest
= (__c
== EOF
? __dfault
: static_cast<char>(__c
));
265 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
272 ctype
<wchar_t>::_M_initialize_ctype() throw()
274 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
275 __c_locale __old
= __uselocale(_M_c_locale_ctype
);
278 for (__i
= 0; __i
< 128; ++__i
)
280 const int __c
= wctob(__i
);
284 _M_narrow
[__i
] = static_cast<char>(__c
);
289 _M_narrow_ok
= false;
291 __j
< sizeof(_M_widen
) / sizeof(wint_t); ++__j
)
292 _M_widen
[__j
] = btowc(__j
);
294 for (size_t __k
= 0; __k
<= 11; ++__k
)
296 _M_bit
[__k
] = static_cast<mask
>(_ISbit(__k
));
297 _M_wmask
[__k
] = _M_convert_to_wmask(_M_bit
[__k
]);
299 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
303 #endif // _GLIBCXX_USE_WCHAR_T
305 _GLIBCXX_END_NAMESPACE_VERSION