stdcpp/src/num_get.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 04 Oct 2010 02:56:42 +0300
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Revision: 201039 Kit: 201039
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/*
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 * © Portions copyright (c) 2006-2007 Nokia Corporation.  All rights reserved.
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 *
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 * Copyright (c) 1999
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 * Silicon Graphics Computer Systems, Inc.
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 *
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 * Copyright (c) 1999 
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 * Boris Fomitchev
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 *
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 * This material is provided "as is", with absolutely no warranty expressed
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 * or implied. Any use is at your own risk.
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 *
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 * Permission to use or copy this software for any purpose is hereby granted 
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 * without fee, provided the above notices are retained on all copies.
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 * Permission to modify the code and to distribute modified code is granted,
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 * provided the above notices are retained, and a notice that the code was
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 * modified is included with the above copyright notice.
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 *
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 */ 
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# include "stlport_prefix.h"
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#include <stl/_num_get.h>
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#include <stl/_istream.h>
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#include <stl/_algo.h>
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#if defined(__LIBSTD_CPP_SYMBIAN32_WSD__) || defined(_STLP_LIBSTD_CPP_NO_STATIC_VAR_)
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#include "libstdcppwsd.h"
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# endif
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_STLP_BEGIN_NAMESPACE
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//----------------------------------------------------------------------
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// num_get
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#if defined(__LIBSTD_CPP_SYMBIAN32_WSD__) || defined(_STLP_LIBSTD_CPP_NO_STATIC_VAR_)
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//initialize the static array
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void num_get_array_init()
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{
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	strcpy(get_num_get_narrow_digits(),"0123456789");
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	strcpy(get_num_get_narrow_xdigits(),"aAbBcCdDeEfF");	
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}
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# else
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static char narrow_digits[11]  = "0123456789";
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static char narrow_xdigits[13] = "aAbBcCdDeEfF";
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# endif
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# ifndef _STLP_NO_WCHAR_T 
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void  _STLP_CALL
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_Initialize_get_digit(wchar_t* digits, wchar_t* xdigits,
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                       const ctype<wchar_t>& ct)
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{
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#if defined(__LIBSTD_CPP_SYMBIAN32_WSD__) || defined(_STLP_LIBSTD_CPP_NO_STATIC_VAR_)
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  ct.widen(get_num_get_narrow_digits() + 0,  get_num_get_narrow_digits() + 10,  digits);
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  ct.widen(get_num_get_narrow_xdigits() + 0, get_num_get_narrow_xdigits() + 10, xdigits);
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#else
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  ct.widen(narrow_digits + 0,  narrow_digits + 10,  digits);
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  ct.widen(narrow_xdigits + 0, narrow_xdigits + 10, xdigits);
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# endif  
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}
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// Return either the digit corresponding to c, or a negative number if
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// if c isn't a digit.  We return -1 if c is the separator character, and
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// -2 if it's some other non-digit.
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int _STLP_CALL __get_digit(wchar_t c,
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                           const wchar_t* digits, const wchar_t* xdigits,
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                           wchar_t separator)
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{
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  // Test if it's the separator.
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  if (c == separator)
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    return -1;
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  const wchar_t* p;
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  // Test if it's a decimal digit.
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  p = find(digits, digits + 10, c);
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  if (p != digits + 10)
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    return (int)(p - digits);
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  // Test if it's a hex digit.
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  p = find(xdigits, xdigits + 12, c);
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  if (p != xdigits + 12)
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    return (int)(10 + (xdigits - p) / 2);
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  else
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    return -2;                  // It's not a digit and not the separator.
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}
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# endif /* _STLP_NO_WCHAR_T */
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// __valid_grouping compares two strings, one representing the
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// group sizes encountered when reading an integer, and the other
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// representing the valid group sizes as returned by the numpunct
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// grouping() member function.  Both are interpreted right-to-left.
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// The grouping string is treated as if it were extended indefinitely
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// with its last value.  For a grouping to be valid, each term in
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// the first string must be equal to the corresponding term in the
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// second, except for the last, which must be less than or equal.
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// boris : this takes reversed first string !
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_STLP_EXP_DECLSPEC bool  _STLP_CALL
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__valid_grouping(const char * first1, const char * last1, 
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                 const char * first2, const char * last2)
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{
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  if (first1 == last1 || first2 == last2) return true;
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  --last1; --last2;
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  while (first1 != last1) {
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    if (*last1 != *first2)
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      return false;
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    --last1;
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    if (first2 != last2) ++first2;
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  }
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  return *last1 <= *first2;
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}
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// this needed for some compilers to make sure sumbols are extern
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extern const unsigned char __digit_val_table[];
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extern const char __narrow_atoms[];
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const unsigned char __digit_val_table[128] = 
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{
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  0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
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  0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
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  0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
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   0, 1, 2, 3, 4, 5, 6, 7, 8, 9,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
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  0xFF,10,11,12,13,14,15,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
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  0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
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  0xFF,10,11,12,13,14,15,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
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  0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF
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};     
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const char __narrow_atoms[5] = {'+', '-', '0', 'x', 'X'};
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_STLP_EXP_DECLSPEC unsigned char* _STLP_CALL __get_digit_val_table(void)
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{
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	return (unsigned char*)__digit_val_table;
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}
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_STLP_EXP_DECLSPEC char* _STLP_CALL __get_narrow_atoms(void)
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{
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	return (char*)__narrow_atoms;
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}
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// index is actually a char
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# ifndef _STLP_NO_WCHAR_T
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//----------------------------------------------------------------------
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// Force instantiation of of num_get<>
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#if !defined(_STLP_NO_FORCE_INSTANTIATE)
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template class _STLP_CLASS_DECLSPEC  istreambuf_iterator<wchar_t, char_traits<wchar_t> >;
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template class num_get<wchar_t, istreambuf_iterator<wchar_t, char_traits<wchar_t> > >;
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// template class num_get<wchar_t, const wchar_t*>;
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#endif
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# endif /* _STLP_NO_WCHAR_T */
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//----------------------------------------------------------------------
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// Force instantiation of of num_get<>
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#if !defined(_STLP_NO_FORCE_INSTANTIATE)
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template class _STLP_CLASS_DECLSPEC istreambuf_iterator<char, char_traits<char> >;
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// template class num_get<char, const char*>;
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template class num_get<char, istreambuf_iterator<char, char_traits<char> > >;
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#endif
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// basic_streambuf<char, char_traits<char> >* _STLP_CALL _M_get_istreambuf(basic_istream<char, char_traits<char> >& ) ;
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_STLP_END_NAMESPACE
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// Local Variables:
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// mode:C++
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// End:
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