#ifndef __rf_word_ih__
#define __rf_word_ih__

#include "rf_word.hh"
#include "rf_common.ih"

#include <wctype.h>
#include <wchar.h>
#include <locale.h>

namespace rftype
{

using namespace rfrt ;

inline Word::Word (wchar_t const* _wstr) :
  Term (term_sym, type_word)
{
  size_t len = wcslen(_wstr);
  Header* h = static_cast<Header*>(
    allocator.allocate(sizeof(Header) + len * sizeof(wchar_t)));
  h->ref_count = 1;
  h->length = len;
  uint32_t hash = 0;
  for (size_t i = 0; i < len; i++) {
    h->content[i] = _wstr[i];
    hash = update_hash(hash, h->content + i, sizeof(wchar_t));
  }
  h->hash = finish_hash(hash);
  ptr_data2 = h;
}

inline Word::Word (char const* _str, char const* _locale /* = null */) :
  Term (term_sym, type_word)
{
  char const* saved_locale = null;
  if (_locale != null) {
    saved_locale = setlocale(LC_CTYPE, null);
    setlocale(LC_CTYPE, _locale);
  }
  char const* s = _str;
  mbstate_t ps;
  size_t len = mbsrtowcs(null, &s, 0, &ps);
//  if (len == (size_t)(-1)) throw_sys_error(errno);
  Header* h = static_cast<Header*>(
    allocator.allocate(sizeof(Header) + len * sizeof(wchar_t)));
  h->ref_count = 1;
  h->length = len;
  s = _str;
  uint32_t hash = 0;
  for (size_t i = 0; i < len; i++) {
    size_t l = mbrtowc(h->content + i, s, MB_CUR_MAX, &ps);
    s += l;
    hash = update_hash(hash, h->content + i, sizeof(wchar_t));
  }
  h->hash = finish_hash(hash);
  ptr_data2 = h;
  if (_locale != null) setlocale(LC_CTYPE, saved_locale);
}
  
inline Word::Word (Word const& _word) :
  Term (term_sym, type_word)
{
  ptr_data2 = _word.ptr_data2;
  Header* h = static_cast<Header*>(ptr_data2);
  h->ref_count++;
}
 
inline Word::~Word ()
{ 
  Header* h = static_cast<Header*>(ptr_data2);
  if (--(h->ref_count) == 0) allocator.deallocate(h);
}

inline Word& Word::operator = (Word const& _word)
{
  if (this != &_word) {
    Header* h = static_cast<Header*>(ptr_data2);
    if (--(h->ref_count) == 0) allocator.deallocate(h);
    ptr_data2 = _word.ptr_data2;
    h = static_cast<Header*>(ptr_data2);
    h->ref_count++;
  }
  return self;
}

inline size_t Word::get_len () const 
{
  return static_cast<Header*>(ptr_data2)->length;
}


//first symbol in word is '-' res == -1; '+' res == 1, 
//'digit' res == 2; othewise res == 0
//

inline Word::is_number_res Word::is_number () const
{
  is_number_res res = not_a_number;
  size_t i = 0;
  Header* h = static_cast<Header*>(ptr_data2);

  for (; ;)
    if ((h->content[i]) != ' ')
      break;
    else {
      i++;
      res = space_number
    ;}

  if ((h->content[i]) == '-') res = minus; 
  else
  if ((h->content[i]) == '+') res = plus; 
  else
  if (iswdigit(h->content[i])) res = positive_number;
  else res = not_a_number;

  if (res != not_a_number) 
    i++;
  bool prev = false;

  if (res == space_number) {
    i++; 
    prev = true;
  }

  for (; i < h->length; i++) {
    if (iswdigit(h->content[i]) == 0) {  
      if ((h->content[i]) == ' ') { 
        prev = true;
        continue;
      }

      else { 
        res = not_a_number; 
        break;
      }
    }
    else 
      if (prev) { 
        res = not_a_number; 
        break; 
      }
      else 
      if (res == not_a_number) break;
      else
        continue; 
  }
  return res;
}


//the method returns 1, if the word has spaces at the beginning,
//and returns 2, if the word has spaces at the end; 0, if there are no
//spaces in the word
//
inline int Word::has_spaces () const {
  Header* h = static_cast<Header*>(ptr_data2);
  if ( *(h->content) == ' ')
    return 1;
  else
  if ( *(h->content + h->length) == ' ')
    return 2;
  else return 0;

}



//the method is called only if is_number() function 
//has returned non-zero value
//

inline Word::NumIterator::NumIterator(Word const& _word) 
{
  Header* h = static_cast<Header*>(_word.ptr_data2);

  for (size_t i = 0; i < h->length; i++){    
    if ( *(h->content + i) == ' ') 
      continue;
    else {
      iter = h->content + i;
      break;
    }
  }

  if (*(h->content) == '+' || *(h->content) == '-')
    iter = h->content + 1;

  for (size_t i = h->length - 1; ; i--)
    if (h->content[i] == ' ') 
      continue;
    else {
      bound = h->content + i;
      break;
    }
} 
 
inline Word::NumIterator& Word::NumIterator::operator ++(int) 
{
  iter++;      
  return *this;
};

inline Word::NumIterator const& Word::NumIterator::operator = (Word const& _word) {
  Header* h = static_cast<Header*>(_word.ptr_data2);
  if (*(h->content) == '+' || *(h->content) == '-')
    iter = h->content + 1;
  else
    iter = h->content;
  return *this;
};

inline bool Word::NumIterator::in_bounds () const 
{
  if (iter > bound ) 
    return false;
  else 
    return true;
}

inline const char Word::NumIterator::operator * () const
{
    return *iter - 48;
}

#if 0
Expr Word::create_expr (wchar_t const* _wstr)
 {
  Expr e = Term::create_expr(1);
  Term* p = e.get_first();
  new(p) Word(_wstr);
  return e;
}

Expr Word::create_expr (char const* _str, char const* _locale /* = null */)
{
  Expr e = Term::create_expr(1);
  Term* p = e.get_first();
  new(p) Word(_str, _locale);
  return e;
}
#endif

}

#endif // __rf_word_ih__