1 // std::ctype implementation details, generic version -*- C++ -*-
2
3 // Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
4 //
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 2, or (at your option)
9 // any later version.
10
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.
15
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19 // USA.
20
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
29
30 //
31 // ISO C++ 14882: 22.2.1.1.2 ctype virtual functions.
32 //
33
34 // Written by Benjamin Kosnik <bkoz@redhat.com>
35
36 #include <locale>
37
_GLIBCXX_BEGIN_NAMESPACE(std)38 _GLIBCXX_BEGIN_NAMESPACE(std)
39
40 // NB: The other ctype<char> specializations are in src/locale.cc and
41 // various /config/os/* files.
42 template<>
43 ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
44 : ctype<char>(0, false, __refs)
45 {
46 if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
47 {
48 this->_S_destroy_c_locale(this->_M_c_locale_ctype);
49 this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
50 }
51 }
52
53 #ifdef _GLIBCXX_USE_WCHAR_T
54 ctype<wchar_t>::__wmask_type
_M_convert_to_wmask(const mask __m) const55 ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const
56 {
57 __wmask_type __ret;
58 switch (__m)
59 {
60 case space:
61 __ret = wctype("space");
62 break;
63 case print:
64 __ret = wctype("print");
65 break;
66 case cntrl:
67 __ret = wctype("cntrl");
68 break;
69 case upper:
70 __ret = wctype("upper");
71 break;
72 case lower:
73 __ret = wctype("lower");
74 break;
75 case alpha:
76 __ret = wctype("alpha");
77 break;
78 case digit:
79 __ret = wctype("digit");
80 break;
81 case punct:
82 __ret = wctype("punct");
83 break;
84 case xdigit:
85 __ret = wctype("xdigit");
86 break;
87 case alnum:
88 __ret = wctype("alnum");
89 break;
90 case graph:
91 __ret = wctype("graph");
92 break;
93 default:
94 __ret = __wmask_type();
95 }
96 return __ret;
97 };
98
99 wchar_t
do_toupper(wchar_t __c) const100 ctype<wchar_t>::do_toupper(wchar_t __c) const
101 { return towupper(__c); }
102
103 const wchar_t*
do_toupper(wchar_t * __lo,const wchar_t * __hi) const104 ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
105 {
106 while (__lo < __hi)
107 {
108 *__lo = towupper(*__lo);
109 ++__lo;
110 }
111 return __hi;
112 }
113
114 wchar_t
do_tolower(wchar_t __c) const115 ctype<wchar_t>::do_tolower(wchar_t __c) const
116 { return towlower(__c); }
117
118 const wchar_t*
do_tolower(wchar_t * __lo,const wchar_t * __hi) const119 ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
120 {
121 while (__lo < __hi)
122 {
123 *__lo = towlower(*__lo);
124 ++__lo;
125 }
126 return __hi;
127 }
128
129 bool
130 ctype<wchar_t>::
do_is(mask __m,char_type __c) const131 do_is(mask __m, char_type __c) const
132 {
133 bool __ret = false;
134 // Generically, 15 (instead of 10) since we don't know the numerical
135 // encoding of the various categories in /usr/include/ctype.h.
136 const size_t __bitmasksize = 15;
137 for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
138 if (__m & _M_bit[__bitcur]
139 && iswctype(__c, _M_wmask[__bitcur]))
140 {
141 __ret = true;
142 break;
143 }
144 return __ret;
145 }
146
147 const wchar_t*
148 ctype<wchar_t>::
do_is(const wchar_t * __lo,const wchar_t * __hi,mask * __vec) const149 do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
150 {
151 for (;__lo < __hi; ++__vec, ++__lo)
152 {
153 // Generically, 15 (instead of 10) since we don't know the numerical
154 // encoding of the various categories in /usr/include/ctype.h.
155 const size_t __bitmasksize = 15;
156 mask __m = 0;
157 for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
158 if (iswctype(*__lo, _M_wmask[__bitcur]))
159 __m |= _M_bit[__bitcur];
160 *__vec = __m;
161 }
162 return __hi;
163 }
164
165 const wchar_t*
166 ctype<wchar_t>::
do_scan_is(mask __m,const wchar_t * __lo,const wchar_t * __hi) const167 do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
168 {
169 while (__lo < __hi && !this->do_is(__m, *__lo))
170 ++__lo;
171 return __lo;
172 }
173
174 const wchar_t*
175 ctype<wchar_t>::
do_scan_not(mask __m,const char_type * __lo,const char_type * __hi) const176 do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
177 {
178 while (__lo < __hi && this->do_is(__m, *__lo) != 0)
179 ++__lo;
180 return __lo;
181 }
182
183 wchar_t
184 ctype<wchar_t>::
do_widen(char __c) const185 do_widen(char __c) const
186 { return _M_widen[static_cast<unsigned char>(__c)]; }
187
188 const char*
189 ctype<wchar_t>::
do_widen(const char * __lo,const char * __hi,wchar_t * __dest) const190 do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
191 {
192 while (__lo < __hi)
193 {
194 *__dest = _M_widen[static_cast<unsigned char>(*__lo)];
195 ++__lo;
196 ++__dest;
197 }
198 return __hi;
199 }
200
201 char
202 ctype<wchar_t>::
do_narrow(wchar_t __wc,char __dfault) const203 do_narrow(wchar_t __wc, char __dfault) const
204 {
205 if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
206 return _M_narrow[__wc];
207 const int __c = wctob(__wc);
208 return (__c == EOF ? __dfault : static_cast<char>(__c));
209 }
210
211 const wchar_t*
212 ctype<wchar_t>::
do_narrow(const wchar_t * __lo,const wchar_t * __hi,char __dfault,char * __dest) const213 do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
214 char* __dest) const
215 {
216 if (_M_narrow_ok)
217 while (__lo < __hi)
218 {
219 if (*__lo >= 0 && *__lo < 128)
220 *__dest = _M_narrow[*__lo];
221 else
222 {
223 const int __c = wctob(*__lo);
224 *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
225 }
226 ++__lo;
227 ++__dest;
228 }
229 else
230 while (__lo < __hi)
231 {
232 const int __c = wctob(*__lo);
233 *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
234 ++__lo;
235 ++__dest;
236 }
237 return __hi;
238 }
239
240 void
_M_initialize_ctype()241 ctype<wchar_t>::_M_initialize_ctype()
242 {
243 wint_t __i;
244 for (__i = 0; __i < 128; ++__i)
245 {
246 const int __c = wctob(__i);
247 if (__c == EOF)
248 break;
249 else
250 _M_narrow[__i] = static_cast<char>(__c);
251 }
252 if (__i == 128)
253 _M_narrow_ok = true;
254 else
255 _M_narrow_ok = false;
256 for (size_t __i = 0;
257 __i < sizeof(_M_widen) / sizeof(wint_t); ++__i)
258 _M_widen[__i] = btowc(__i);
259
260 for (size_t __i = 0; __i <= 15; ++__i)
261 {
262 _M_bit[__i] = static_cast<mask>(1 << __i);
263 _M_wmask[__i] = _M_convert_to_wmask(_M_bit[__i]);
264 }
265 }
266 #endif // _GLIBCXX_USE_WCHAR_T
267
268 _GLIBCXX_END_NAMESPACE
269