reactos/include/c++/stlport/stl/char_traits.h

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/*
* 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)
# include <sys/types.h> // For off_t
#endif /* __unix */
#if defined (__BORLANDC__)
# include <mem.h>
# include <string.h>
# include <_stddef.h>
# include <sys/types.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(_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
# ifdef _STLP_USE_DEFAULT_FILE_OFFSET
typedef off_t streamoff;
# elif defined(_LARGEFILE_SOURCE) || defined(_LARGEFILE64_SOURCE) /* || defined(__USE_FILE_OFFSET64) */ \
/* || (defined(_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)) */ /* || defined (__sgi) && defined (_STLP_HAS_NO_NEW_C_HEADERS) */
typedef off64_t streamoff;
# else
typedef off_t streamoff;
# endif
#endif /* __unix */
#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;
};
typedef fpos<mbstate_t> streampos;
typedef fpos<mbstate_t> wstreampos;
// 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;
typedef mbstate_t state_type;
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 __stlport_class<char_traits<char> > {
public:
typedef char char_type;
typedef int int_type;
typedef streamoff off_type;
typedef streampos pos_type;
typedef mbstate_t state_type;
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 (__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); }
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: