libstdc++-v3/config/os/generic/ctype_inline.h

   1 // Locale support -*- C++ -*-
   2
   3 // Copyright (C) 2000, 2003, 2009 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
  44 _GLIBCXX_BEGIN_NAMESPACE(std)
  45
  46   bool
  47   ctype<char>::
  48   is(mask __m, char __c) const
  49   {
  50     if (_M_table)
  51       return _M_table[static_cast<unsigned char>(__c)] & __m;
  52     else
  53       {
  54         bool __ret = false;
  55         const size_t __bitmasksize = 15;
  56         size_t __bitcur = 0; // Lowest bitmask in ctype_base == 0
  57         for (; __bitcur <= __bitmasksize; ++__bitcur)
  58           {
  59             const mask __bit = static_cast<mask>(1 << __bitcur);
  60             if (__m & __bit)
  61               {
  62                 bool __testis;
  63                 switch (__bit)
  64                   {
  65                   case space:
  66                     __testis = isspace(__c);
  67                     break;
  68                   case print:
  69                     __testis = isprint(__c);
  70                     break;
  71                   case cntrl:
  72                     __testis = iscntrl(__c);
  73                     break;
  74                   case upper:
  75                     __testis = isupper(__c);
  76                     break;
  77                   case lower:
  78                     __testis = islower(__c);
  79                     break;
  80                   case alpha:
  81                     __testis = isalpha(__c);
  82                     break;
  83                   case digit:
  84                     __testis = isdigit(__c);
  85                     break;
  86                   case punct:
  87                     __testis = ispunct(__c);
  88                     break;
  89                   case xdigit:
  90                     __testis = isxdigit(__c);
  91                     break;
  92                   case alnum:
  93                     __testis = isalnum(__c);
  94                     break;
  95                   case graph:
  96                     __testis = isgraph(__c);
  97                     break;
  98                   default:
  99                     __testis = false;
 100                     break;
 101                   }
 102                 __ret |= __testis;
 103               }
 104           }
 105         return __ret;
 106       }
 107   }
 108
 109   const char*
 110   ctype<char>::
 111   is(const char* __low, const char* __high, mask* __vec) const
 112   {
 113     if (_M_table)
 114       while (__low < __high)
 115         *__vec++ = _M_table[static_cast<unsigned char>(*__low++)];
 116     else
 117       {
 118         // Highest bitmask in ctype_base == 10.
 119         const size_t __bitmasksize = 15;
 120         for (;__low < __high; ++__vec, ++__low)
 121           {
 122             mask __m = 0;
 123             // Lowest bitmask in ctype_base == 0
 124             size_t __i = 0;
 125             for (;__i <= __bitmasksize; ++__i)
 126               {
 127                 const mask __bit = static_cast<mask>(1 << __i);
 128                 if (this->is(__bit, *__low))
 129                   __m |= __bit;
 130               }
 131             *__vec = __m;
 132           }
 133       }
 134     return __high;
 135   }
 136
 137   const char*
 138   ctype<char>::
 139   scan_is(mask __m, const char* __low, const char* __high) const
 140   {
 141     if (_M_table)
 142       while (__low < __high
 143              && !(_M_table[static_cast<unsigned char>(*__low)] & __m))
 144         ++__low;
 145     else
 146       while (__low < __high && !this->is(__m, *__low))
 147         ++__low;
 148     return __low;
 149   }
 150
 151   const char*
 152   ctype<char>::
 153   scan_not(mask __m, const char* __low, const char* __high) const
 154   {
 155     if (_M_table)
 156       while (__low < __high
 157              && (_M_table[static_cast<unsigned char>(*__low)] & __m) != 0)
 158         ++__low;
 159     else
 160       while (__low < __high && this->is(__m, *__low) != 0)
 161         ++__low;
 162     return __low;
 163   }
 164
 165 _GLIBCXX_END_NAMESPACE