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 /*

  * Copyright (c) 1999

  * Silicon Graphics Computer Systems, Inc.

  *

  * Copyright (c) 1999

  * Boris Fomitchev

  *

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

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

  *

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

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

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

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

  * modified is included with the above copyright notice.

  *

  */

 #include "stlport_prefix.h"

 #include <locale>

 #include <ostream>

 _STLP_BEGIN_NAMESPACE

 // Note that grouping[0] is the number of digits in the *rightmost* group.

 // We assume, without checking, that *last is null and that there is enough

 // space in the buffer to extend the number past [first, last).

 template <class Char>

 static ptrdiff_t

 __insert_grouping_aux(Char* first, Char* last, const string& grouping,

                       Char separator, Char Plus, Char Minus,

                       int basechars) {

   typedef string::size_type str_size;

   if (first == last)

     return 0;

   int sign = 0;

   if (*first == Plus || *first == Minus) {

     sign = 1;

     ++first;

   }

   first += basechars;

   Char* cur_group = last; // Points immediately beyond the rightmost

                           // digit of the current group.

   int groupsize = 0; // Size of the current group (if grouping.size() == 0, size

                      // of group unlimited: we force condition (groupsize <= 0))

   for ( str_size n = 0; ; ) { // Index of the current group

     if ( n < grouping.size() ) {

       groupsize = __STATIC_CAST(int, grouping[n++] );

     }

     if ((groupsize <= 0) || (groupsize >= cur_group - first) || (groupsize == CHAR_MAX)) {

       break;

     }

     // Insert a separator character just before position cur_group - groupsize

     cur_group -= groupsize;

     ++last;

     copy_backward(cur_group, last, last + 1);

     *cur_group = separator;

   }

   return (last - first) + sign + basechars;

 }

 //Dynamic output buffer version.

 template <class Char, class Str>

 static void

 __insert_grouping_aux( /* __basic_iostring<Char> */ Str& iostr, size_t __group_pos,

                       const string& grouping,

                       Char separator, Char Plus, Char Minus,

                       int basechars) {

   typedef string::size_type str_size;

   if (iostr.size() < __group_pos)

     return;

   int __first_pos = 0;

   Char __first = *iostr.begin();

   if (__first == Plus || __first == Minus) {

     ++__first_pos;

   }

   __first_pos += basechars;

   typename Str::iterator cur_group(iostr.begin() + __group_pos);    // Points immediately beyond the rightmost

                                                                     // digit of the current group.

   int groupsize = 0; // Size of the current group (if grouping.size() == 0, size

                      // of group unlimited: we force condition (groupsize <= 0))

   for ( str_size n = 0; ; ) { // Index of the current group

     if ( n < grouping.size() ) {

       groupsize = __STATIC_CAST( int, grouping[n++] );

     }

     if ( (groupsize <= 0) || (groupsize >= ((cur_group - iostr.begin()) - __first_pos)) ||

          (groupsize == CHAR_MAX)) {

       break;

     }

     // Insert a separator character just before position cur_group - groupsize

     cur_group -= groupsize;

     cur_group = iostr.insert(cur_group, separator);

   }

 }

 //----------------------------------------------------------------------

 // num_put

 _STLP_MOVE_TO_PRIV_NAMESPACE

 _STLP_DECLSPEC const char* _STLP_CALL __hex_char_table_lo()

 { return "0123456789abcdefx"; }

 _STLP_DECLSPEC const char* _STLP_CALL __hex_char_table_hi()

 { return "0123456789ABCDEFX"; }

 char* _STLP_CALL

 __write_integer(char* buf, ios_base::fmtflags flags, long x) {

   char tmp[64];

   char* bufend = tmp+64;

   char* beg = __write_integer_backward(bufend, flags, x);

   return copy(beg, bufend, buf);

 }

 ///-------------------------------------

 ptrdiff_t _STLP_CALL

 __insert_grouping(char * first, char * last, const string& grouping,

                   char separator, char Plus, char Minus, int basechars) {

   return __insert_grouping_aux(first, last, grouping,

                                separator, Plus, Minus, basechars);

 }

 void _STLP_CALL

 __insert_grouping(__iostring &str, size_t group_pos, const string& grouping,

                   char separator, char Plus, char Minus, int basechars) {

   __insert_grouping_aux(str, group_pos, grouping, separator, Plus, Minus, basechars);

 }

 #if !defined (_STLP_NO_WCHAR_T)

 ptrdiff_t _STLP_CALL

 __insert_grouping(wchar_t* first, wchar_t* last, const string& grouping,

                   wchar_t separator, wchar_t Plus, wchar_t Minus,

                   int basechars) {

   return __insert_grouping_aux(first, last, grouping, separator,

                                Plus, Minus, basechars);

 }

 void _STLP_CALL

 __insert_grouping(__iowstring &str, size_t group_pos, const string& grouping,

                   wchar_t separator, wchar_t Plus, wchar_t Minus,

                   int basechars) {

   __insert_grouping_aux(str, group_pos, grouping, separator, Plus, Minus, basechars);

 }

 #endif

 _STLP_MOVE_TO_STD_NAMESPACE

 //----------------------------------------------------------------------

 // Force instantiation of num_put<>

 #if !defined(_STLP_NO_FORCE_INSTANTIATE)

 template class _STLP_CLASS_DECLSPEC ostreambuf_iterator<char, char_traits<char> >;

 // template class num_put<char, char*>;

 template class num_put<char, ostreambuf_iterator<char, char_traits<char> > >;

 # ifndef _STLP_NO_WCHAR_T

 template class ostreambuf_iterator<wchar_t, char_traits<wchar_t> >;

 template class num_put<wchar_t, ostreambuf_iterator<wchar_t, char_traits<wchar_t> > >;

 // template class num_put<wchar_t, wchar_t*>;

 # endif /* INSTANTIATE_WIDE_STREAMS */

 #endif

 _STLP_END_NAMESPACE

 // Local Variables:

 // mode:C++

 // End: