1 // Locale support -*- C++ -*-
2
3 // Copyright (C) 2000-2016 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 /** @file bits/ctype_inline.h
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{locale}
28 */
29
30 //
31 // ISO C++ 14882: 22.1 Locales
32 //
33
34 // ctype bits to be inlined go here. Non-inlinable (ie virtual do_*)
35 // functions go in ctype.cc
36
37 // The following definitions are portable, but insanely slow. If one
38 // cares at all about performance, then specialized ctype
39 // functionality should be added for the native os in question: see
40 // the config/os/bits/ctype_*.h files.
41
42 // Constructing a synthetic "C" table should be seriously considered...
43
_GLIBCXX_VISIBILITY(default)44 namespace std _GLIBCXX_VISIBILITY(default)
45 {
46 _GLIBCXX_BEGIN_NAMESPACE_VERSION
47
48 bool
49 ctype<char>::
50 is(mask __m, char __c) const
51 {
52 if (_M_table)
53 return _M_table[static_cast<unsigned char>(__c)] & __m;
54 else
55 {
56 bool __ret = false;
57 const size_t __bitmasksize = 15;
58 size_t __bitcur = 0; // Lowest bitmask in ctype_base == 0
59 for (; __bitcur <= __bitmasksize; ++__bitcur)
60 {
61 const mask __bit = static_cast<mask>(1 << __bitcur);
62 if (__m & __bit)
63 {
64 bool __testis;
65 switch (__bit)
66 {
67 case space:
68 __testis = isspace(__c);
69 break;
70 case print:
71 __testis = isprint(__c);
72 break;
73 case cntrl:
74 __testis = iscntrl(__c);
75 break;
76 case upper:
77 __testis = isupper(__c);
78 break;
79 case lower:
80 __testis = islower(__c);
81 break;
82 case alpha:
83 __testis = isalpha(__c);
84 break;
85 case digit:
86 __testis = isdigit(__c);
87 break;
88 case punct:
89 __testis = ispunct(__c);
90 break;
91 case xdigit:
92 __testis = isxdigit(__c);
93 break;
94 case alnum:
95 __testis = isalnum(__c);
96 break;
97 case graph:
98 __testis = isgraph(__c);
99 break;
100 #ifdef _GLIBCXX_USE_C99_CTYPE_TR1
101 case blank:
102 __testis = isblank(__c);
103 break;
104 #endif
105 default:
106 __testis = false;
107 break;
108 }
109 __ret |= __testis;
110 }
111 }
112 return __ret;
113 }
114 }
115
116 const char*
117 ctype<char>::
118 is(const char* __low, const char* __high, mask* __vec) const
119 {
120 if (_M_table)
121 while (__low < __high)
122 *__vec++ = _M_table[static_cast<unsigned char>(*__low++)];
123 else
124 {
125 // Highest bitmask in ctype_base == 11.
126 const size_t __bitmasksize = 15;
127 for (;__low < __high; ++__vec, ++__low)
128 {
129 mask __m = 0;
130 // Lowest bitmask in ctype_base == 0
131 size_t __i = 0;
132 for (;__i <= __bitmasksize; ++__i)
133 {
134 const mask __bit = static_cast<mask>(1 << __i);
135 if (this->is(__bit, *__low))
136 __m |= __bit;
137 }
138 *__vec = __m;
139 }
140 }
141 return __high;
142 }
143
144 const char*
145 ctype<char>::
146 scan_is(mask __m, const char* __low, const char* __high) const
147 {
148 if (_M_table)
149 while (__low < __high
150 && !(_M_table[static_cast<unsigned char>(*__low)] & __m))
151 ++__low;
152 else
153 while (__low < __high && !this->is(__m, *__low))
154 ++__low;
155 return __low;
156 }
157
158 const char*
159 ctype<char>::
160 scan_not(mask __m, const char* __low, const char* __high) const
161 {
162 if (_M_table)
163 while (__low < __high
164 && (_M_table[static_cast<unsigned char>(*__low)] & __m) != 0)
165 ++__low;
166 else
167 while (__low < __high && this->is(__m, *__low) != 0)
168 ++__low;
169 return __low;
170 }
171
172 _GLIBCXX_END_NAMESPACE_VERSION
173 } // namespace
174