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STLport-4.5.3
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char_traits.h
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C/C++ Source or Header
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2001-09-29
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7KB
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267 lines
/*
* 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
# if defined (_STLP_OWN_IOSTREAMS) || ! defined (_STLP_USE_NEW_IOSTREAMS)
# if ! defined (_STLP_CSTDDEF)
# include <cstddef>
# endif
# if !defined (_STLP_CWCHAR)
# include <cwchar>
# endif
#if ! defined (_STLP_CSTRING)
# include <cstring>
#endif
#ifndef __TYPE_TRAITS_H
# include <stl/type_traits.h>
#endif
#if defined (_STLP_UNIX) && defined (_STLP_HAS_NO_NEW_C_HEADERS)
#include <sys/types.h> // For off_t
#endif /* __unix */
#ifdef __BORLANDC__
# include <mem.h>
# include <string.h>
# include <_stddef.h>
class mbstate_t;
#endif
_STLP_BEGIN_NAMESPACE
# ifdef _STLP_OWN_IOSTREAMS
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 (__unix) && defined (_STLP_HAS_NO_NEW_C_HEADERS) /* Other version of UNIX */
// typedef off_t streamoff;
#else /* __unix */
// boris : here, it's not ptrdiff_t as some Solaris systems have confusing definitions of these.
typedef long streamoff;
#endif /* _STLP_HAS_NO_NEW_C_HEADERS */
typedef ptrdiff_t streamsize;
// 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 _STLP_CALL operator==(const fpos<_StateT>& __y) const
{ return _M_pos == __y._M_pos; }
bool _STLP_CALL operator!=(const fpos<_StateT>& __y) const
{ return _M_pos != __y._M_pos; }
fpos<_StateT>& operator+=(streamoff __off) {
_M_pos += __off;
return *this;
}
fpos<_StateT>& operator-=(streamoff __off) {
_M_pos -= __off;
return *this;
}
fpos<_StateT> operator+(streamoff __off) {
fpos<_StateT> __tmp(*this);
__tmp += __off;
return __tmp;
}
fpos<_StateT> operator-(streamoff __off) {
fpos<_StateT> __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;
# endif
// Class __char_traits_base.
template <class _CharT, class _IntT> class __char_traits_base {
public:
typedef _CharT char_type;
typedef _IntT int_type;
#ifdef _STLP_USE_NEW_IOSTREAMS
typedef streamoff off_type;
typedef streampos pos_type;
# ifdef _STLP_NO_MBSTATE_T
typedef char state_type;
# else
typedef mbstate_t state_type;
# endif
#endif /* _STLP_USE_NEW_IOSTREAMS */
static void _STLP_CALL assign(char_type& __c1, const char_type& __c2) { __c1 = __c2; }
static bool _STLP_CALL eq(const _CharT& __c1, const _CharT& __c2)
{ return __c1 == __c2; }
static bool _STLP_CALL lt(const _CharT& __c1, const _CharT& __c2)
{ return __c1 < __c2; }
static int _STLP_CALL compare(const _CharT* __s1, const _CharT* __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 _CharT* __s) {
const _CharT _NullChar = _STLP_DEFAULT_CONSTRUCTED(_CharT);
size_t __i;
for (__i = 0; !eq(__s[__i], _NullChar); ++__i)
{}
return __i;
}
static const _CharT* _STLP_CALL find(const _CharT* __s, size_t __n, const _CharT& __c) {
for ( ; __n > 0 ; ++__s, --__n)
if (eq(*__s, __c))
return __s;
return 0;
}
static _CharT* _STLP_CALL move(_CharT* __s1, const _CharT* __s2, size_t _Sz) {
return (_Sz == 0 ? __s1 : (_CharT*)memmove(__s1, __s2, _Sz * sizeof(_CharT)));
}
static _CharT* _STLP_CALL copy(_CharT* __s1, const _CharT* __s2, size_t __n) {
return (__n == 0 ? __s1 :
(_CharT*)memcpy(__s1, __s2, __n * sizeof(_CharT)));
}
static _CharT* _STLP_CALL assign(_CharT* __s, size_t __n, _CharT __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;
// return __STATIC_CAST(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;
#ifdef _STLP_USE_NEW_IOSTREAMS
typedef streamoff off_type;
# ifndef _STLP_NO_MBSTATE_T
typedef streampos pos_type;
typedef mbstate_t state_type;
# endif
#endif /* _STLP_USE_NEW_IOSTREAMS */
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>
{};
# endif
_STLP_END_NAMESPACE
# else /* OWN_IOSTREAMS */
# include <wrap_std/iosfwd>
# endif /* OWN_IOSTREAMS */
#endif /* _STLP_CHAR_TRAITS_H */
// Local Variables:
// mode:C++
// End: