libstdc++-v3/src/locale_facets.cc

   1 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   2 // 2006, 2007
   3 // 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 #include <locale>
  31
  32 _GLIBCXX_BEGIN_NAMESPACE(std)
  33
  34   // Definitions for static const data members of time_base.
  35   template<>
  36     const char*
  37     __timepunct_cache<char>::_S_timezones[14] =
  38     {
  39       "GMT", "HST", "AKST", "PST", "MST", "CST", "EST", "AST", "NST", "CET",
  40       "IST", "EET", "CST", "JST"
  41     };
  42
  43 #ifdef _GLIBCXX_USE_WCHAR_T
  44   template<>
  45     const wchar_t*
  46     __timepunct_cache<wchar_t>::_S_timezones[14] =
  47     {
  48       L"GMT", L"HST", L"AKST", L"PST", L"MST", L"CST", L"EST", L"AST",
  49       L"NST", L"CET", L"IST", L"EET", L"CST", L"JST"
  50     };
  51 #endif
  52
  53   // Definitions for static const data members of money_base.
  54   const money_base::pattern
  55   money_base::_S_default_pattern =  { {symbol, sign, none, value} };
  56
  57   const char* money_base::_S_atoms = "-0123456789";
  58
  59   const char* __num_base::_S_atoms_in = "-+xX0123456789abcdefABCDEF";
  60   const char* __num_base::_S_atoms_out ="-+xX0123456789abcdef0123456789ABCDEF";
  61
  62   // _GLIBCXX_RESOLVE_LIB_DEFECTS
  63   // According to the resolution of DR 231, about 22.2.2.2.2, p11,
  64   // "str.precision() is specified in the conversion specification".
  65   void
  66   __num_base::_S_format_float(const ios_base& __io, char* __fptr, char __mod)
  67   {
  68     ios_base::fmtflags __flags = __io.flags();
  69     *__fptr++ = '%';
  70     // [22.2.2.2.2] Table 60
  71     if (__flags & ios_base::showpos)
  72       *__fptr++ = '+';
  73     if (__flags & ios_base::showpoint)
  74       *__fptr++ = '#';
  75
  76     // As per DR 231: _always_, not only when
  77     // __flags & ios_base::fixed || __prec > 0
  78     *__fptr++ = '.';
  79     *__fptr++ = '*';
  80
  81     if (__mod)
  82       *__fptr++ = __mod;
  83     ios_base::fmtflags __fltfield = __flags & ios_base::floatfield;
  84     // [22.2.2.2.2] Table 58
  85     if (__fltfield == ios_base::fixed)
  86       *__fptr++ = 'f';
  87     else if (__fltfield == ios_base::scientific)
  88       *__fptr++ = (__flags & ios_base::uppercase) ? 'E' : 'e';
  89     else
  90       *__fptr++ = (__flags & ios_base::uppercase) ? 'G' : 'g';
  91     *__fptr = '\0';
  92   }
  93
  94   bool
  95   __verify_grouping(const char* __grouping, size_t __grouping_size,
  96                     const string& __grouping_tmp)
  97   {
  98     const size_t __n = __grouping_tmp.size() - 1;
  99     const size_t __min = std::min(__n, size_t(__grouping_size - 1));
 100     size_t __i = __n;
 101     bool __test = true;
 102
 103     // Parsed number groupings have to match the
 104     // numpunct::grouping string exactly, starting at the
 105     // right-most point of the parsed sequence of elements ...
 106     for (size_t __j = 0; __j < __min && __test; --__i, ++__j)
 107       __test = __grouping_tmp[__i] == __grouping[__j];
 108     for (; __i && __test; --__i)
 109       __test = __grouping_tmp[__i] == __grouping[__min];
 110     // ... but the first parsed grouping can be <= numpunct
 111     // grouping (only do the check if the numpunct char is > 0
 112     // because <= 0 means any size is ok).
 113     if (static_cast<signed char>(__grouping[__min]) > 0)
 114       __test &= __grouping_tmp[0] <= __grouping[__min];
 115     return __test;
 116   }
 117
 118 _GLIBCXX_END_NAMESPACE