1// Locale support -*- C++ -*-
2
3// Copyright (C) 2000, 2003 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: 22.1  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
44  bool
45  ctype<char>::
46  is(mask __m, char __c) const
47  {
48    if (_M_table)
49      return _M_table[static_cast<unsigned char>(__c)] & __m;
50    else
51      {
52	bool __ret = false;
53	const size_t __bitmasksize = 15;
54	size_t __bitcur = 0; // Lowest bitmask in ctype_base == 0
55	for (; __bitcur <= __bitmasksize; ++__bitcur)
56	  {
57	    const mask __bit = static_cast<mask>(1 << __bitcur);
58	    if (__m & __bit)
59	      {
60		bool __testis;
61		switch (__bit)
62		  {
63		  case space:
64		    __testis = isspace(__c);
65		    break;
66		  case print:
67		    __testis = isprint(__c);
68		    break;
69		  case cntrl:
70		    __testis = iscntrl(__c);
71		    break;
72		  case upper:
73		    __testis = isupper(__c);
74		    break;
75		  case lower:
76		    __testis = islower(__c);
77		    break;
78		  case alpha:
79		    __testis = isalpha(__c);
80		    break;
81		  case digit:
82		    __testis = isdigit(__c);
83		    break;
84		  case punct:
85		    __testis = ispunct(__c);
86		    break;
87		  case xdigit:
88		    __testis = isxdigit(__c);
89		    break;
90		  case alnum:
91		    __testis = isalnum(__c);
92		    break;
93		  case graph:
94		    __testis = isgraph(__c);
95		    break;
96		  default:
97		    __testis = false;
98		    break;
99		  }
100		__ret |= __testis;
101	      }
102	  }
103	return __ret;
104      }
105  }
106
107  const char*
108  ctype<char>::
109  is(const char* __low, const char* __high, mask* __vec) const
110  {
111    if (_M_table)
112      while (__low < __high)
113	*__vec++ = _M_table[static_cast<unsigned char>(*__low++)];
114    else
115      {
116	// Highest bitmask in ctype_base == 10.
117	const size_t __bitmasksize = 15;
118	for (;__low < __high; ++__vec, ++__low)
119	  {
120	    mask __m = 0;
121	    // Lowest bitmask in ctype_base == 0
122	    size_t __i = 0;
123	    for (;__i <= __bitmasksize; ++__i)
124	      {
125		const mask __bit = static_cast<mask>(1 << __i);
126		if (this->is(__bit, *__low))
127		  __m |= __bit;
128	      }
129	    *__vec = __m;
130	  }
131      }
132    return __high;
133  }
134
135  const char*
136  ctype<char>::
137  scan_is(mask __m, const char* __low, const char* __high) const
138  {
139    if (_M_table)
140      while (__low < __high
141	     && !(_M_table[static_cast<unsigned char>(*__low)] & __m))
142	++__low;
143    else
144      while (__low < __high && !this->is(__m, *__low))
145	++__low;
146    return __low;
147  }
148
149  const char*
150  ctype<char>::
151  scan_not(mask __m, const char* __low, const char* __high) const
152  {
153    if (_M_table)
154      while (__low < __high
155	     && (_M_table[static_cast<unsigned char>(*__low)] & __m) != 0)
156	++__low;
157    else
158      while (__low < __high && this->is(__m, *__low) != 0)
159	++__low;
160    return __low;
161  }
162