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1 | // std::ctype implementation details, newlib version -*- C++ -*- |
2 | ||
3 | // Copyright (C) 2011 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 3, 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 | // 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. | |
19 | ||
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/>. | |
24 | ||
25 | // | |
26 | // ISO C++ 14882: 22.2.1.1.2 ctype virtual functions. | |
27 | // | |
28 | ||
29 | #include <locale> | |
30 | #include <cstdlib> | |
31 | #include <cstring> | |
32 | #include <cstdio> | |
33 | ||
34 | namespace std _GLIBCXX_VISIBILITY(default) | |
35 | { | |
36 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
37 | ||
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) | |
42 | { | |
43 | if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0) | |
44 | { | |
45 | this->_S_destroy_c_locale(this->_M_c_locale_ctype); | |
46 | this->_S_create_c_locale(this->_M_c_locale_ctype, __s); | |
47 | } | |
48 | } | |
49 | ||
50 | ctype_byname<char>::~ctype_byname() | |
51 | { } | |
52 | ||
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() | |
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 | // Different from the generic version, xdigit and print in | |
95 | // newlib are defined as bitwise-OR result of bitmasks: | |
96 | // xdigit = _X | _N; | |
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 | |
101 | // here. | |
102 | if (__m & xdigit) | |
103 | __ret = wctype("xdigit"); | |
104 | else if (__m & print) | |
105 | __ret = wctype("print"); | |
106 | else | |
107 | __ret = __wmask_type(); | |
108 | } | |
109 | return __ret; | |
110 | }; | |
111 | ||
112 | wchar_t | |
113 | ctype<wchar_t>::do_toupper(wchar_t __c) const | |
114 | { return towupper(__c); } | |
115 | ||
116 | const wchar_t* | |
117 | ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const | |
118 | { | |
119 | while (__lo < __hi) | |
120 | { | |
121 | *__lo = towupper(*__lo); | |
122 | ++__lo; | |
123 | } | |
124 | return __hi; | |
125 | } | |
126 | ||
127 | wchar_t | |
128 | ctype<wchar_t>::do_tolower(wchar_t __c) const | |
129 | { return towlower(__c); } | |
130 | ||
131 | const wchar_t* | |
132 | ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const | |
133 | { | |
134 | while (__lo < __hi) | |
135 | { | |
136 | *__lo = towlower(*__lo); | |
137 | ++__lo; | |
138 | } | |
139 | return __hi; | |
140 | } | |
141 | ||
142 | bool | |
143 | ctype<wchar_t>:: | |
144 | do_is(mask __m, wchar_t __c) const | |
145 | { | |
146 | bool __ret = false; | |
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])) | |
152 | { | |
153 | __ret = true; | |
154 | break; | |
155 | } | |
156 | return __ret; | |
157 | } | |
158 | ||
159 | const wchar_t* | |
160 | ctype<wchar_t>:: | |
161 | do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const | |
162 | { | |
163 | for (; __lo < __hi; ++__vec, ++__lo) | |
164 | { | |
165 | // Newlib C library has a compact encoding that uses 8 bits only. | |
166 | const size_t __bitmasksize = 7; | |
167 | mask __m = 0; | |
168 | for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur) | |
169 | if (iswctype(*__lo, _M_wmask[__bitcur])) | |
170 | __m |= _M_bit[__bitcur]; | |
171 | *__vec = __m; | |
172 | } | |
173 | return __hi; | |
174 | } | |
175 | ||
176 | const wchar_t* | |
177 | ctype<wchar_t>:: | |
178 | do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const | |
179 | { | |
180 | while (__lo < __hi && !this->do_is(__m, *__lo)) | |
181 | ++__lo; | |
182 | return __lo; | |
183 | } | |
184 | ||
185 | const wchar_t* | |
186 | ctype<wchar_t>:: | |
187 | do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const | |
188 | { | |
189 | while (__lo < __hi && this->do_is(__m, *__lo) != 0) | |
190 | ++__lo; | |
191 | return __lo; | |
192 | } | |
193 | ||
194 | wchar_t | |
195 | ctype<wchar_t>:: | |
196 | do_widen(char __c) const | |
197 | { return _M_widen[static_cast<unsigned char>(__c)]; } | |
198 | ||
199 | const char* | |
200 | ctype<wchar_t>:: | |
201 | do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const | |
202 | { | |
203 | while (__lo < __hi) | |
204 | { | |
205 | *__dest = _M_widen[static_cast<unsigned char>(*__lo)]; | |
206 | ++__lo; | |
207 | ++__dest; | |
208 | } | |
209 | return __hi; | |
210 | } | |
211 | ||
212 | char | |
213 | ctype<wchar_t>:: | |
214 | do_narrow(wchar_t __wc, char __dfault) const | |
215 | { | |
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)); | |
220 | } | |
221 | ||
222 | const wchar_t* | |
223 | ctype<wchar_t>:: | |
224 | do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault, | |
225 | char* __dest) const | |
226 | { | |
227 | if (_M_narrow_ok) | |
228 | while (__lo < __hi) | |
229 | { | |
230 | if (*__lo >= 0 && *__lo < 128) | |
231 | *__dest = _M_narrow[*__lo]; | |
232 | else | |
233 | { | |
234 | const int __c = wctob(*__lo); | |
235 | *__dest = (__c == EOF ? __dfault : static_cast<char>(__c)); | |
236 | } | |
237 | ++__lo; | |
238 | ++__dest; | |
239 | } | |
240 | else | |
241 | while (__lo < __hi) | |
242 | { | |
243 | const int __c = wctob(*__lo); | |
244 | *__dest = (__c == EOF ? __dfault : static_cast<char>(__c)); | |
245 | ++__lo; | |
246 | ++__dest; | |
247 | } | |
248 | return __hi; | |
249 | } | |
250 | ||
251 | void | |
252 | ctype<wchar_t>::_M_initialize_ctype() throw() | |
253 | { | |
254 | wint_t __i; | |
255 | for (__i = 0; __i < 128; ++__i) | |
256 | { | |
257 | const int __c = wctob(__i); | |
258 | if (__c == EOF) | |
259 | break; | |
260 | else | |
261 | _M_narrow[__i] = static_cast<char>(__c); | |
262 | } | |
263 | if (__i == 128) | |
264 | _M_narrow_ok = true; | |
265 | else | |
266 | _M_narrow_ok = false; | |
267 | for (size_t __i = 0; | |
268 | __i < sizeof(_M_widen) / sizeof(wint_t); ++__i) | |
269 | _M_widen[__i] = btowc(__i); | |
270 | ||
271 | for (size_t __i = 0; __i <= 7; ++__i) | |
272 | { | |
273 | _M_bit[__i] = static_cast<mask>(1 << __i); | |
274 | _M_wmask[__i] = _M_convert_to_wmask(_M_bit[__i]); | |
275 | } | |
276 | } | |
277 | #endif // _GLIBCXX_USE_WCHAR_T | |
278 | ||
279 | _GLIBCXX_END_NAMESPACE_VERSION | |
280 | } // namespace |