/*

 * Copyright (c) 1996,1997

 * 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_CHAR_TRAITS_H

#define _STLP_CHAR_TRAITS_H

// Define char_traits

#ifndef _STLP_INTERNAL_CSTDDEF

#  include <stl/_cstddef.h>

#endif

#ifndef _STLP_INTERNAL_CSTRING

#  include <stl/_cstring.h>

#endif

#if defined (__unix) || defined (N_PLAT_NLM)

#  include <sys/types.h>         // For off_t

#endif /* __unix */

#ifdef __BORLANDC__

#  include _STLP_NATIVE_C_HEADER(mem.h)

#  include _STLP_NATIVE_C_HEADER(string.h)

#  include _STLP_NATIVE_C_HEADER(_stddef.h)

#endif

#ifndef _STLP_INTERNAL_CONSTRUCT_H

#  include <stl/_construct.h>

#endif

#ifndef _STLP_INTERNAL_CWCHAR

#  include <stl/_cwchar.h>

#endif

_STLP_BEGIN_NAMESPACE

template <class _Tp> class allocator;

#define _STLP_NULL_CHAR_INIT(_ChT) _STLP_DEFAULT_CONSTRUCTED(_ChT)

#if defined (__sgi) && defined (_STLP_HAS_NO_NEW_C_HEADERS) /* IRIX */

typedef off64_t streamoff;

#elif defined(_STLP_WCE)

typedef long streamoff;

#elif defined (_STLP_WIN32)

#  if defined (_STLP_LONG_LONG) && !defined (__CYGWIN__)

//The Win32 file io API support 64 bits access so streamoff and streamsize

//has to reflect that. Do not change the stringbuf behavior.

typedef _STLP_LONG_LONG streamoff;

#  else

typedef ptrdiff_t streamoff;

#  endif

#else // __unix

typedef off_t streamoff;

#endif /* _STLP_HAS_NO_NEW_C_HEADERS */

#if defined (_STLP_WIN32)

typedef streamoff streamsize;

#else

typedef ptrdiff_t streamsize;

#endif

// Class fpos, which represents a position within a file.  (The C++

// standard calls for it to be defined in <ios>.  This implementation

// moves it to <iosfwd>, which is included by <ios>.)

template <class _StateT> class fpos {

public:                         // From table 88 of the C++ standard.

  fpos(streamoff __pos) : _M_pos(__pos), _M_st(_STLP_NULL_CHAR_INIT(_StateT)) {}

  fpos() : _M_pos(0), _M_st(_STLP_NULL_CHAR_INIT(_StateT)) {}

  operator streamoff() const { return _M_pos; }

  bool operator==(const fpos& __y) const

  { return _M_pos == __y._M_pos; }

  bool operator!=(const fpos& __y) const

  { return _M_pos != __y._M_pos; }

  fpos& operator+=(streamoff __off) {

    _M_pos += __off;

    return *this;

  }

  fpos& operator-=(streamoff __off) {

    _M_pos -= __off;

    return *this;

  }

  fpos operator+(streamoff __off) {

    fpos __tmp(*this);

    __tmp += __off;

    return __tmp;

  }

  fpos operator-(streamoff __off) {

    fpos __tmp(*this);

    __tmp -= __off;

    return __tmp;

  }

public:                         // Manipulation of the state member.

  _StateT state() const { return _M_st; }

  void state(_StateT __st) { _M_st = __st; }

private:

  streamoff _M_pos;

  _StateT _M_st;

};

#if !defined (_STLP_NO_MBSTATE_T)

typedef fpos<mbstate_t> streampos;

typedef fpos<mbstate_t> wstreampos;

#endif

// Class __char_traits_base.

template <class _CharT, class _IntT>

class __char_traits_base {

public:

  typedef _CharT char_type;

  typedef _IntT int_type;

  typedef streamoff off_type;

  typedef streampos pos_type;

#if defined (_STLP_NO_MBSTATE_T)

  typedef char      state_type;

#else

  typedef mbstate_t state_type;

#endif

  static void _STLP_CALL assign(char_type& __c1, const char_type& __c2) { __c1 = __c2; }

  static bool _STLP_CALL eq(const char_type& __c1, const char_type& __c2)

  { return __c1 == __c2; }

  static bool _STLP_CALL lt(const char_type& __c1, const char_type& __c2)

  { return __c1 < __c2; }

  static int _STLP_CALL compare(const char_type* __s1, const char_type* __s2, size_t __n) {

    for (size_t __i = 0; __i < __n; ++__i)

      if (!eq(__s1[__i], __s2[__i]))

        return __s1[__i] < __s2[__i] ? -1 : 1;

    return 0;

  }

  static size_t _STLP_CALL length(const char_type* __s) {

    const char_type _NullChar = _STLP_DEFAULT_CONSTRUCTED(char_type);

    size_t __i(0);

    for (; !eq(__s[__i], _NullChar); ++__i) {}

    return __i;

  }

  static const char_type* _STLP_CALL find(const char_type* __s, size_t __n, const char_type& __c) {

    for ( ; __n > 0 ; ++__s, --__n)

      if (eq(*__s, __c))

        return __s;

    return 0;

  }

  static char_type* _STLP_CALL move(char_type* __s1, const char_type* __s2, size_t _Sz)

  { return (_Sz == 0 ? __s1 : (char_type*)memmove(__s1, __s2, _Sz * sizeof(char_type))); }

  static char_type* _STLP_CALL copy(char_type* __s1, const char_type* __s2, size_t __n) {

    return (__n == 0 ? __s1 :

      (char_type*)memcpy(__s1, __s2, __n * sizeof(char_type)));

  }

  static char_type* _STLP_CALL assign(char_type* __s, size_t __n, char_type __c) {

    for (size_t __i = 0; __i < __n; ++__i)

      __s[__i] = __c;

    return __s;

  }

  static int_type _STLP_CALL not_eof(const int_type& __c)

  { return !eq_int_type(__c, eof()) ? __c : __STATIC_CAST(int_type, 0); }

  static char_type _STLP_CALL to_char_type(const int_type& __c)

  { return (char_type)__c; }

  static int_type _STLP_CALL to_int_type(const char_type& __c)

  { return (int_type)__c; }

  static bool _STLP_CALL eq_int_type(const int_type& __c1, const int_type& __c2)

  { return __c1 == __c2; }

  static int_type _STLP_CALL eof()

  { return (int_type)-1; }

};

// Generic char_traits class.  Note that this class is provided only

//  as a base for explicit specialization; it is unlikely to be useful

//  as is for any particular user-defined type.  In particular, it

//  *will not work* for a non-POD type.

template <class _CharT>

class char_traits

  : public __char_traits_base<_CharT, _CharT> {};

// Specialization for char.

_STLP_TEMPLATE_NULL

class _STLP_CLASS_DECLSPEC char_traits<char>

  : public __char_traits_base<char, int> {

public:

  typedef char char_type;

  typedef int int_type;

  typedef streamoff off_type;

#if !defined (_STLP_NO_MBSTATE_T)

  typedef streampos pos_type;

  typedef mbstate_t state_type;

#endif

  static char _STLP_CALL to_char_type(const int& __c)

  { return (char)(unsigned char)__c; }

  static int _STLP_CALL to_int_type(const char& __c)

  { return (unsigned char)__c; }

  static int _STLP_CALL compare(const char* __s1, const char* __s2, size_t __n)

  { return memcmp(__s1, __s2, __n); }

  static size_t _STLP_CALL length(const char* __s)

  { return strlen(__s); }

  static void _STLP_CALL assign(char& __c1, const char& __c2)

  { __c1 = __c2; }

  static char* _STLP_CALL assign(char* __s, size_t __n, char __c) {

    memset(__s, __c, __n);

    return __s;

  }

};

#if defined (_STLP_HAS_WCHAR_T)

// Specialization for wchar_t.

_STLP_TEMPLATE_NULL

class _STLP_CLASS_DECLSPEC char_traits<wchar_t>

  : public __char_traits_base<wchar_t, wint_t> {

#  if !defined (_STLP_NO_NATIVE_WIDE_FUNCTIONS) && !defined (_STLP_WCHAR_HPACC_EXCLUDE)

public:

#    if !defined (N_PLAT_NLM)

#      if !defined (__BORLANDC__)

  static wchar_t* _STLP_CALL move(wchar_t* __dest, const wchar_t* __src, size_t __n)

  { return wmemmove(__dest, __src, __n); }

#      endif

  static wchar_t* _STLP_CALL copy(wchar_t* __dest, const wchar_t* __src, size_t __n)

  { return wmemcpy(__dest, __src, __n); }

#      if !defined (__DMC__) && !defined (__BORLANDC__)

  static int _STLP_CALL compare(const wchar_t* __s1, const wchar_t* __s2, size_t __n)

  { return wmemcmp(__s1, __s2, __n); }

#      endif

  static wchar_t* _STLP_CALL assign(wchar_t* __s, size_t __n, wchar_t __c)

  { return wmemset(__s, __c, __n); }

#    endif

  static size_t _STLP_CALL length(const wchar_t* __s)

  { return wcslen(__s); }

  static void _STLP_CALL assign(wchar_t& __c1, const wchar_t& __c2)

  { __c1 = __c2; }

#  endif

};

#endif

_STLP_END_NAMESPACE

#endif /* _STLP_CHAR_TRAITS_H */

// Local Variables:

// mode:C++

// End: