/*

  * 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: