williamr@2: /*
williamr@2:  * Copyright (c) 1996,1997
williamr@2:  * Silicon Graphics Computer Systems, Inc.
williamr@2:  *
williamr@2:  * Copyright (c) 1999
williamr@2:  * Boris Fomitchev
williamr@2:  *
williamr@2:  * This material is provided "as is", with absolutely no warranty expressed
williamr@2:  * or implied. Any use is at your own risk.
williamr@2:  *
williamr@2:  * Permission to use or copy this software for any purpose is hereby granted
williamr@2:  * without fee, provided the above notices are retained on all copies.
williamr@2:  * Permission to modify the code and to distribute modified code is granted,
williamr@2:  * provided the above notices are retained, and a notice that the code was
williamr@2:  * modified is included with the above copyright notice.
williamr@2:  *
williamr@2:  */
williamr@2: 
williamr@2: #ifndef _STLP_CHAR_TRAITS_H
williamr@2: #define _STLP_CHAR_TRAITS_H
williamr@2: 
williamr@2: // Define char_traits
williamr@2: 
williamr@2: # if defined (_STLP_OWN_IOSTREAMS) || ! defined (_STLP_USE_NEW_IOSTREAMS)
williamr@2: 
williamr@2: # if ! defined (_STLP_CSTDDEF)
williamr@2: #  include <cstddef>
williamr@2: # endif
williamr@2: 
williamr@2: #if ! defined (_STLP_CSTRING)
williamr@2: #  include <cstring>
williamr@2: #endif
williamr@2: 
williamr@2: #if defined (_STLP_UNIX) && defined (_STLP_HAS_NO_NEW_C_HEADERS)
williamr@2: #include <sys/types.h>          // For off_t
williamr@2: #endif /* __unix */
williamr@2: 
williamr@2: #ifdef __BORLANDC__
williamr@2: # include <mem.h>
williamr@2: # include <string.h>
williamr@2: # include <_stddef.h>
williamr@2: // class mbstate_t;
williamr@2: #endif
williamr@2: 
williamr@2: #ifndef __TYPE_TRAITS_H
williamr@2: # include <stl/type_traits.h>
williamr@2: #endif
williamr@2: 
williamr@2: # if !defined (_STLP_CWCHAR)
williamr@2: #  include <stl/_cwchar.h>
williamr@2: # endif
williamr@2: 
williamr@2: _STLP_BEGIN_NAMESPACE
williamr@2: 
williamr@2: # ifdef _STLP_OWN_IOSTREAMS
williamr@2: 
williamr@2: template <class _Tp> class allocator;
williamr@2: 
williamr@2: #define _STLP_NULL_CHAR_INIT(_ChT) _STLP_DEFAULT_CONSTRUCTED(_ChT)
williamr@2: 
williamr@2: #if defined (__sgi) && defined (_STLP_HAS_NO_NEW_C_HEADERS) /* IRIX */
williamr@2: typedef off64_t   streamoff;
williamr@2: // #elif defined (__unix) && defined (_STLP_HAS_NO_NEW_C_HEADERS) /* Other version of UNIX */
williamr@2: // typedef off_t     streamoff;
williamr@2: #else /* __unix */
williamr@2: // boris : here, it's not ptrdiff_t as some Solaris systems have confusing definitions of these.
williamr@2: typedef long streamoff;
williamr@2: #endif /* _STLP_HAS_NO_NEW_C_HEADERS */
williamr@2: 
williamr@2: typedef ptrdiff_t streamsize;
williamr@2: 
williamr@2: // Class fpos, which represents a position within a file.  (The C++
williamr@2: // standard calls for it to be defined in <ios>.  This implementation
williamr@2: // moves it to <iosfwd>, which is included by <ios>.)
williamr@2: template <class _StateT> class fpos
williamr@2: {
williamr@2: public:                         // From table 88 of the C++ standard.
williamr@2:   fpos(streamoff __pos) : _M_pos(__pos), _M_st(_STLP_NULL_CHAR_INIT(_StateT)) {}
williamr@2:   fpos() : _M_pos(0), _M_st(_STLP_NULL_CHAR_INIT(_StateT)) {}
williamr@2: 
williamr@2:   operator streamoff() const { return _M_pos; }
williamr@2: 
williamr@2:   bool  _STLP_CALL operator==(const fpos<_StateT>& __y) const
williamr@2:     { return _M_pos == __y._M_pos; }
williamr@2:   bool _STLP_CALL operator!=(const fpos<_StateT>& __y) const
williamr@2:     { return _M_pos != __y._M_pos; }
williamr@2: 
williamr@2:   fpos<_StateT>& operator+=(streamoff __off) {
williamr@2:     _M_pos += __off;
williamr@2:     return *this;
williamr@2:   }
williamr@2:   fpos<_StateT>& operator-=(streamoff __off) {
williamr@2:     _M_pos -= __off;
williamr@2:     return *this;
williamr@2:   }
williamr@2: 
williamr@2:   fpos<_StateT> operator+(streamoff __off) {
williamr@2:     fpos<_StateT> __tmp(*this);
williamr@2:     __tmp += __off;
williamr@2:     return __tmp;
williamr@2:   }
williamr@2:   fpos<_StateT> operator-(streamoff __off) {
williamr@2:     fpos<_StateT> __tmp(*this);
williamr@2:     __tmp -= __off;
williamr@2:     return __tmp;
williamr@2:   }
williamr@2: 
williamr@2: public:                         // Manipulation of the state member.
williamr@2:   _StateT state() const { return _M_st; }
williamr@2:   void state(_StateT __st) { _M_st = __st; }
williamr@2: private:
williamr@2:   streamoff _M_pos;
williamr@2:   _StateT _M_st;
williamr@2: };
williamr@2: 
williamr@2: typedef fpos<mbstate_t> streampos;
williamr@2: typedef fpos<mbstate_t> wstreampos;
williamr@2: # endif
williamr@2: 
williamr@2: // Class __char_traits_base.
williamr@2: 
williamr@2: template <class _CharT, class _IntT> class __char_traits_base {
williamr@2: public:
williamr@2:   typedef _CharT char_type;
williamr@2:   typedef _IntT int_type;
williamr@2: #ifdef _STLP_USE_NEW_IOSTREAMS
williamr@2:   typedef streamoff off_type;
williamr@2:   typedef streampos pos_type;
williamr@2: # ifdef _STLP_NO_MBSTATE_T
williamr@2:   typedef char      state_type;
williamr@2: # else
williamr@2:   typedef mbstate_t state_type;
williamr@2: # endif
williamr@2: #endif /* _STLP_USE_NEW_IOSTREAMS */
williamr@2: 
williamr@2:   static void _STLP_CALL assign(char_type& __c1, const char_type& __c2) { __c1 = __c2; }
williamr@2:   static bool _STLP_CALL eq(const _CharT& __c1, const _CharT& __c2)
williamr@2:     { return __c1 == __c2; }
williamr@2:   static bool _STLP_CALL lt(const _CharT& __c1, const _CharT& __c2)
williamr@2:     { return __c1 < __c2; }
williamr@2: 
williamr@2:   static int _STLP_CALL compare(const _CharT* __s1, const _CharT* __s2, size_t __n) {
williamr@2:     for (size_t __i = 0; __i < __n; ++__i)
williamr@2:       if (!eq(__s1[__i], __s2[__i]))
williamr@2:         return __s1[__i] < __s2[__i] ? -1 : 1;
williamr@2:     return 0;
williamr@2:   }
williamr@2: 
williamr@2:   static size_t _STLP_CALL length(const _CharT* __s) {
williamr@2:     const _CharT _NullChar = _STLP_DEFAULT_CONSTRUCTED(_CharT);
williamr@2:     size_t __i;
williamr@2:     for (__i = 0; !eq(__s[__i], _NullChar); ++__i)
williamr@2:       {}
williamr@2:     return __i;
williamr@2:   }
williamr@2: 
williamr@2:   static const _CharT* _STLP_CALL find(const _CharT* __s, size_t __n, const _CharT& __c) {
williamr@2:     for ( ; __n > 0 ; ++__s, --__n)
williamr@2:       if (eq(*__s, __c))
williamr@2:         return __s;
williamr@2:     return 0;
williamr@2:   }
williamr@2: 
williamr@2: 
williamr@2:   static _CharT* _STLP_CALL move(_CharT* __s1, const _CharT* __s2, size_t _Sz) {
williamr@2:     return (_Sz == 0 ? __s1 : (_CharT*)memmove(__s1, __s2, _Sz * sizeof(_CharT)));
williamr@2:   }
williamr@2: 
williamr@2:   static _CharT* _STLP_CALL copy(_CharT* __s1, const _CharT* __s2, size_t __n) {
williamr@2:     return (__n == 0 ? __s1 :
williamr@2: 	    (_CharT*)memcpy(__s1, __s2, __n * sizeof(_CharT)));
williamr@2:     }
williamr@2: 
williamr@2:   static _CharT* _STLP_CALL assign(_CharT* __s, size_t __n, _CharT __c) {
williamr@2:     for (size_t __i = 0; __i < __n; ++__i)
williamr@2:       __s[__i] = __c;
williamr@2:     return __s;
williamr@2:   }
williamr@2: 
williamr@2:   static int_type _STLP_CALL not_eof(const int_type& __c) {
williamr@2:     return !eq_int_type(__c, eof()) ? __c : __STATIC_CAST(int_type, 0);
williamr@2:   }
williamr@2: 
williamr@2:   static char_type _STLP_CALL to_char_type(const int_type& __c) {
williamr@2:     return (char_type)__c;
williamr@2:   }
williamr@2: 
williamr@2:   static int_type _STLP_CALL to_int_type(const char_type& __c) {
williamr@2:     return (int_type)__c;
williamr@2:   }
williamr@2: 
williamr@2:   static bool _STLP_CALL eq_int_type(const int_type& __c1, const int_type& __c2) {
williamr@2:     return __c1 == __c2;
williamr@2:   }
williamr@2: 
williamr@2:   static int_type _STLP_CALL eof() {
williamr@2:     return (int_type)-1;
williamr@2:     //    return __STATIC_CAST(int_type,-1);
williamr@2:   }
williamr@2: };
williamr@2: 
williamr@2: // Generic char_traits class.  Note that this class is provided only
williamr@2: //  as a base for explicit specialization; it is unlikely to be useful
williamr@2: //  as is for any particular user-defined type.  In particular, it
williamr@2: //  *will not work* for a non-POD type.
williamr@2: 
williamr@2: template <class _CharT> class char_traits
williamr@2:   : public __char_traits_base<_CharT, _CharT>
williamr@2: {};
williamr@2: 
williamr@2: // Specialization for char.
williamr@2: 
williamr@2: _STLP_TEMPLATE_NULL class _STLP_CLASS_DECLSPEC char_traits<char>
williamr@2:   : public __char_traits_base<char, int>
williamr@2: {
williamr@2: public:
williamr@2:   typedef char char_type;
williamr@2:   typedef int int_type;
williamr@2: #ifdef _STLP_USE_NEW_IOSTREAMS
williamr@2:   typedef streamoff off_type;
williamr@2: # ifndef _STLP_NO_MBSTATE_T
williamr@2:   typedef streampos pos_type;
williamr@2:   typedef mbstate_t state_type;
williamr@2: # endif
williamr@2: #endif /* _STLP_USE_NEW_IOSTREAMS */
williamr@2: 
williamr@2:   static char _STLP_CALL to_char_type(const int& __c) {
williamr@2:     return (char)(unsigned char)__c;
williamr@2:   }
williamr@2: 
williamr@2:   static int _STLP_CALL to_int_type(const char& __c) {
williamr@2:     return (unsigned char)__c;
williamr@2:   }
williamr@2: 
williamr@2:   static int _STLP_CALL compare(const char* __s1, const char* __s2, size_t __n)
williamr@2:     { return memcmp(__s1, __s2, __n); }
williamr@2: 
williamr@2:   static size_t _STLP_CALL length(const char* __s) { return strlen(__s); }
williamr@2: 
williamr@2:   static void _STLP_CALL assign(char& __c1, const char& __c2) { __c1 = __c2; }
williamr@2: 
williamr@2:   static char* _STLP_CALL assign(char* __s, size_t __n, char __c)
williamr@2:     { memset(__s, __c, __n); return __s; }
williamr@2: };
williamr@2: 
williamr@2: # if defined (_STLP_HAS_WCHAR_T)
williamr@2: // Specialization for wchar_t.
williamr@2: _STLP_TEMPLATE_NULL class _STLP_CLASS_DECLSPEC char_traits<wchar_t>
williamr@2:   : public __char_traits_base<wchar_t, wint_t>
williamr@2: {};
williamr@2: # endif
williamr@2: 
williamr@2: _STLP_END_NAMESPACE
williamr@2: 
williamr@2: # else /* OWN_IOSTREAMS */
williamr@2: 
williamr@2: #  include <wrap_std/iosfwd>
williamr@2: 
williamr@2: # endif /* OWN_IOSTREAMS */
williamr@2: 
williamr@2: #endif /* _STLP_CHAR_TRAITS_H */
williamr@2: 
williamr@2: // Local Variables:
williamr@2: // mode:C++
williamr@2: // End:
williamr@2: