_monetary.c

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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.
 *
 */
#ifndef _STLP_MONETARY_C
#define _STLP_MONETARY_C

# ifndef _STLP_INTERNAL_MONETARY_H
#  include <stl/_monetary.h>
# endif

#ifndef _STLP_INTERNAL_IOS_H
# include <stl/_ios.h>
#endif

#ifndef _STLP_INTERNAL_NUM_PUT_H
# include <stl/_num_put.h>
#endif

#ifndef _STLP_INTERNAL_NUM_GET_H
# include <stl/_num_get.h>
#endif

_STLP_BEGIN_NAMESPACE

template <class _CharT, class _InputIterator>
locale::id money_get<_CharT, _InputIterator>::id;

template <class _CharT, class _OutputIterator>
locale::id money_put<_CharT, _OutputIterator>::id;

// money_get facets

_STLP_MOVE_TO_PRIV_NAMESPACE

// helper functions for do_get
template <class _InIt1, class _InIt2>
pair<_InIt1, bool> __get_string( _InIt1 __first, _InIt1 __last,
                                 _InIt2 __str_first, _InIt2 __str_last) {
  while ( __first != __last && __str_first != __str_last && *__first == *__str_first ) {
    ++__first;
    ++__str_first;
  }
  return make_pair(__first, __str_first == __str_last);
}

template <class _InIt, class _OuIt, class _CharT>
bool
__get_monetary_value(_InIt& __first, _InIt __last, _OuIt __out_ite,
                     const ctype<_CharT>& _c_type,
                     _CharT __point, int __frac_digits, _CharT __sep,
                     const string& __grouping, bool &__syntax_ok) {
  if (__first == __last || !_c_type.is(ctype_base::digit, *__first))
    return false;

  char __group_sizes[128];
  char* __group_sizes_end = __grouping.empty()? 0 : __group_sizes;
  char   __current_group_size = 0;

  while (__first != __last) {
    if (_c_type.is(ctype_base::digit, *__first)) {
      ++__current_group_size;
      *__out_ite++ = *__first++;
    }
    else if (__group_sizes_end) {
      if (*__first == __sep) {
        *__group_sizes_end++ = __current_group_size;
        __current_group_size = 0;
        ++__first;
      }
      else break;
    }
    else
      break;
  }

  if (__grouping.empty())
    __syntax_ok = true;
  else {
    if (__group_sizes_end != __group_sizes)
      *__group_sizes_end++ = __current_group_size;

    __syntax_ok = __valid_grouping(__group_sizes, __group_sizes_end,
                                   __grouping.data(), __grouping.data()+ __grouping.size());

    if (__first == __last || *__first != __point) {
      for (int __digits = 0; __digits != __frac_digits; ++__digits)
        *__out_ite++ = _CharT('0');
      return true; // OK not to have decimal point
    }
  }

  ++__first;

  int __digits = 0;

  while (__first != __last && _c_type.is(ctype_base::digit, *__first)) {
      *__out_ite++ = *__first++;
     ++__digits;
  }

  __syntax_ok = __syntax_ok && (__digits == __frac_digits);

  return true;
}


template <class _CharT, class _InputIter, class _StrType>
_InputIter __money_do_get(_InputIter __s, _InputIter __end, bool  __intl,
                     ios_base&  __str, ios_base::iostate&  __err,
                     _StrType& __digits, bool &__is_positive, _CharT* /*__dummy*/) {
  if (__s == __end) {
    __err |= ios_base::eofbit;
    return __s;
  }

  typedef _CharT char_type;
  typedef _StrType string_type;
  typedef _InputIter iter_type;
  typedef moneypunct<char_type, false> _Punct;
  typedef moneypunct<char_type, true>  _Punct_intl;
  typedef ctype<char_type>             _Ctype;

  locale __loc = __str.getloc();
  const _Punct&      __punct      = use_facet<_Punct>(__loc) ;
  const _Punct_intl& __punct_intl = use_facet<_Punct_intl>(__loc) ;
  const _Ctype&      __c_type     = use_facet<_Ctype>(__loc) ;

  money_base::pattern __format = __intl ? __punct_intl.neg_format()
                                        : __punct.neg_format();
  string_type __ns = __intl ? __punct_intl.negative_sign()
                            : __punct.negative_sign();
  string_type __ps = __intl ? __punct_intl.positive_sign()
                            : __punct.positive_sign();
  int __i;
  bool __symbol_required = (__str.flags() & ios_base::showbase) != 0;
  string_type __buf;
  back_insert_iterator<string_type> __out_ite(__buf);

  for (__i = 0; __i < 4; ++__i) {
    switch (__format.field[__i]) {
    case money_base::space:
      if (!__c_type.is(ctype_base::space, *__s)) {
        __err = ios_base::failbit;
        return __s;
      }
      ++__s;
    case money_base::none:
      while (__s != __end && __c_type.is(ctype_base::space, *__s))
        ++__s;
      break;
    case money_base::symbol: {
      string_type __curs = __intl ? __punct_intl.curr_symbol()
                                  : __punct.curr_symbol();
      pair<iter_type, bool>
      __result  = __get_string(__s, __end, __curs.begin(), __curs.end());
      if (!__result.second && __symbol_required)
        __err = ios_base::failbit;
      __s = __result.first;
      break;
    }
    case money_base::sign: {
      if (__s == __end) {
        if (__ps.empty())
          break;
        if (__ns.empty()) {
          __is_positive = false;
          break;
        }
        __err = ios_base::failbit;
        return __s;
      }
      else {
        if (__ps.empty()) {
          if (__ns.empty())
            break;
          if (*__s == __ns[0]) {
            ++__s;
            __is_positive = false;
          }
          break;
        }
        else {
          if (*__s == __ps[0]) {
            ++__s;
            break;
          }
          if (__ns.empty())
            break;
          if (*__s == __ns[0]) {
            ++__s;
            __is_positive = false;
            break;
          }
          __err = ios_base::failbit;
        }
      }
      return __s;
    }
    case money_base::value: {
      char_type __point = __intl ? __punct_intl.decimal_point()
                                 : __punct.decimal_point();
      int __frac_digits = __intl ? __punct_intl.frac_digits()
                                 : __punct.frac_digits();
      string __grouping = __intl ? __punct_intl.grouping()
                                 : __punct.grouping();
      bool __syntax_ok = true;

      bool __result;

      char_type __sep = __grouping.empty() ? char_type() :
      __intl ? __punct_intl.thousands_sep() : __punct.thousands_sep();

      __result = __get_monetary_value(__s, __end, __out_ite, __c_type,
                                      __point, __frac_digits,
                                      __sep,
                                      __grouping, __syntax_ok);

      if (!__syntax_ok)
        __err |= ios_base::failbit;
      if (!__result) {
        __err = ios_base::failbit;
        return __s;
      }
      break;

    }                           // Close money_base::value case
    }                           // Close switch statement
  }                             // Close for loop

  if (__is_positive) {
    if (__ps.size() > 1) {
      pair<_InputIter, bool>
        __result = __get_string(__s, __end, __ps.begin() + 1, __ps.end());
      __s = __result.first;
      if (!__result.second)
        __err |= ios::failbit;
    }
    if (!(__err & ios_base::failbit))
      __digits = __buf;
  }
  else {
    if (__ns.size() > 1) {
      pair<_InputIter, bool>
        __result = __get_string(__s, __end, __ns.begin() + 1, __ns.end());
      __s = __result.first;
      if (!__result.second)
        __err |= ios::failbit;
    }
    if (!(__err & ios::failbit)) {
      __digits = __c_type.widen('-');