The Tor Browser: build/stlport/src/num

     1 /*

     2  * Copyright (c) 1999

     3  * Silicon Graphics Computer Systems, Inc.

     4  *

     5  * Copyright (c) 1999

     6  * Boris Fomitchev

     7  *

     8  * This material is provided "as is", with absolutely no warranty expressed

     9  * or implied. Any use is at your own risk.

    10  *

    11  * Permission to use or copy this software for any purpose is hereby granted

    12  * without fee, provided the above notices are retained on all copies.

    13  * Permission to modify the code and to distribute modified code is granted,

    14  * provided the above notices are retained, and a notice that the code was

    15  * modified is included with the above copyright notice.

    16  *

    17  */

    18 #include "stlport_prefix.h"

    20 #include <locale>

    21 #include <istream>

    22 #include <algorithm>

    24 _STLP_BEGIN_NAMESPACE

    25 _STLP_MOVE_TO_PRIV_NAMESPACE

    27 // __valid_grouping compares two strings, one representing the

    28 // group sizes encountered when reading an integer, and the other

    29 // representing the valid group sizes as returned by the numpunct

    30 // grouping() member function.  Both are interpreted right-to-left.

    31 // The grouping string is treated as if it were extended indefinitely

    32 // with its last value.  For a grouping to be valid, each term in

    33 // the first string must be equal to the corresponding term in the

    34 // second, except for the last, which must be less than or equal.

    36 // boris : this takes reversed first string !

    37 bool  _STLP_CALL

    38 __valid_grouping(const char * first1, const char * last1,

    39                  const char * first2, const char * last2) {

    40   if (first1 == last1 || first2 == last2) return true;

    42   --last1; --last2;

    44   while (first1 != last1) {

    45     if (*last1 != *first2)

    46       return false;

    47     --last1;

    48     if (first2 != last2) ++first2;

    49   }

    51   return *last1 <= *first2;

    52 }

    54 _STLP_DECLSPEC unsigned char _STLP_CALL __digit_val_table(unsigned __index) {

    55   static const unsigned char __val_table[128] = {

    56     0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,

    57     0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,

    58     0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,

    59     0, 1, 2, 3, 4, 5, 6, 7, 8, 9,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,

    60     0xFF,10,11,12,13,14,15,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,

    61     0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,

    62     0xFF,10,11,12,13,14,15,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,

    63     0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF

    64   };

    66   return __val_table[__index];

    67 }

    69 _STLP_DECLSPEC const char* _STLP_CALL __narrow_atoms()

    70 { return "+-0xX"; }

    72 // index is actually a char

    74 #if !defined (_STLP_NO_WCHAR_T)

    76 // Similar, except return the character itself instead of the numeric

    77 // value.  Used for floating-point input.

    78 bool _STLP_CALL __get_fdigit(wchar_t& c, const wchar_t* digits) {

    79   const wchar_t* p = find(digits, digits + 10, c);

    80   if (p != digits + 10) {

    81     c = (char)('0' + (p - digits));

    82     return true;

    83   }

    84   else

    85     return false;

    86 }

    88 bool _STLP_CALL __get_fdigit_or_sep(wchar_t& c, wchar_t sep,

    89                                     const wchar_t * digits) {

    90   if (c == sep) {

    91     c = (char)',';

    92     return true;

    93   }

    94   else

    95     return __get_fdigit(c, digits);

    96 }

    98 #endif

   100 _STLP_MOVE_TO_STD_NAMESPACE

   102 #if !defined(_STLP_NO_FORCE_INSTANTIATE)

   103 //----------------------------------------------------------------------

   104 // Force instantiation of num_get<>

   105 template class _STLP_CLASS_DECLSPEC istreambuf_iterator<char, char_traits<char> >;

   106 // template class num_get<char, const char*>;

   107 template class num_get<char, istreambuf_iterator<char, char_traits<char> > >;

   109 #  if !defined (_STLP_NO_WCHAR_T)

   110 template class _STLP_CLASS_DECLSPEC  istreambuf_iterator<wchar_t, char_traits<wchar_t> >;

   111 template class num_get<wchar_t, istreambuf_iterator<wchar_t, char_traits<wchar_t> > >;

   112 // template class num_get<wchar_t, const wchar_t*>;

   113 #  endif

   114 #endif

   116 _STLP_END_NAMESPACE

   118 // Local Variables:

   119 // mode:C++

   120 // End:

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