0,0 → 1,275 |
// Character Traits for use by standard string and iostream -*- C++ -*- |
|
// Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
// |
// This file is part of the GNU ISO C++ Library. This library is free |
// software; you can redistribute it and/or modify it under the |
// terms of the GNU General Public License as published by the |
// Free Software Foundation; either version 2, or (at your option) |
// any later version. |
|
// This library is distributed in the hope that it will be useful, |
// but WITHOUT ANY WARRANTY; without even the implied warranty of |
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
// GNU General Public License for more details. |
|
// You should have received a copy of the GNU General Public License along |
// with this library; see the file COPYING. If not, write to the Free |
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// USA. |
|
// As a special exception, you may use this file as part of a free software |
// library without restriction. Specifically, if other files instantiate |
// templates or use macros or inline functions from this file, or you compile |
// this file and link it with other files to produce an executable, this |
// file does not by itself cause the resulting executable to be covered by |
// the GNU General Public License. This exception does not however |
// invalidate any other reasons why the executable file might be covered by |
// the GNU General Public License. |
|
// |
// ISO C++ 14882: 21 Strings library |
// |
|
#ifndef _CPP_BITS_CHAR_TRAITS_H |
#define _CPP_BITS_CHAR_TRAITS_H 1 |
|
#pragma GCC system_header |
|
#include <bits/std_cstring.h> // For memmove, memset, memchr |
#include <bits/fpos.h> // For streampos |
|
namespace std |
{ |
// 21.1.2 Basis for explicit _Traits specialization |
// NB: That for any given actual character type this definition is |
// probably wrong. |
template<class _CharT> |
struct char_traits |
{ |
typedef _CharT char_type; |
// Unsigned as wint_t in unsigned. |
typedef unsigned long int_type; |
typedef streampos pos_type; |
typedef streamoff off_type; |
typedef mbstate_t state_type; |
|
static void |
assign(char_type& __c1, const char_type& __c2) |
{ __c1 = __c2; } |
|
static bool |
eq(const char_type& __c1, const char_type& __c2) |
{ return __c1 == __c2; } |
|
static bool |
lt(const char_type& __c1, const char_type& __c2) |
{ return __c1 < __c2; } |
|
static int |
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 lt(__s1[__i], __s2[__i]) ? -1 : 1; |
return 0; |
} |
|
static size_t |
length(const char_type* __s) |
{ |
const char_type* __p = __s; |
while (*__p) ++__p; |
return (__p - __s); |
} |
|
static const char_type* |
find(const char_type* __s, size_t __n, const char_type& __a) |
{ |
for (const char_type* __p = __s; size_t(__p - __s) < __n; ++__p) |
if (*__p == __a) return __p; |
return 0; |
} |
|
static char_type* |
move(char_type* __s1, const char_type* __s2, size_t __n) |
{ return (char_type*) memmove(__s1, __s2, __n * sizeof(char_type)); } |
|
static char_type* |
copy(char_type* __s1, const char_type* __s2, size_t __n) |
{ return (char_type*) memcpy(__s1, __s2, __n * sizeof(char_type)); } |
|
static char_type* |
assign(char_type* __s, size_t __n, char_type __a) |
{ |
for (char_type* __p = __s; __p < __s + __n; ++__p) |
assign(*__p, __a); |
return __s; |
} |
|
static char_type |
to_char_type(const int_type& __c) |
{ return char_type(__c); } |
|
static int_type |
to_int_type(const char_type& __c) { return int_type(__c); } |
|
static bool |
eq_int_type(const int_type& __c1, const int_type& __c2) |
{ return __c1 == __c2; } |
|
static int_type |
eof() { return static_cast<int_type>(-1); } |
|
static int_type |
not_eof(const int_type& __c) |
{ return eq_int_type(__c, eof()) ? int_type(0) : __c; } |
}; |
|
|
// 21.1.4 char_traits specializations |
template<> |
struct char_traits<char> |
{ |
typedef char char_type; |
typedef int int_type; |
typedef streampos pos_type; |
typedef streamoff off_type; |
typedef mbstate_t state_type; |
|
static void |
assign(char_type& __c1, const char_type& __c2) |
{ __c1 = __c2; } |
|
static bool |
eq(const char_type& __c1, const char_type& __c2) |
{ return __c1 == __c2; } |
|
static bool |
lt(const char_type& __c1, const char_type& __c2) |
{ return __c1 < __c2; } |
|
static int |
compare(const char_type* __s1, const char_type* __s2, size_t __n) |
{ return memcmp(__s1, __s2, __n); } |
|
static size_t |
length(const char_type* __s) |
{ return strlen(__s); } |
|
static const char_type* |
find(const char_type* __s, size_t __n, const char_type& __a) |
{ return static_cast<const char_type*>(memchr(__s, __a, __n)); } |
|
static char_type* |
move(char_type* __s1, const char_type* __s2, size_t __n) |
{ return static_cast<char_type*>(memmove(__s1, __s2, __n)); } |
|
static char_type* |
copy(char_type* __s1, const char_type* __s2, size_t __n) |
{ return static_cast<char_type*>(memcpy(__s1, __s2, __n)); } |
|
static char_type* |
assign(char_type* __s, size_t __n, char_type __a) |
{ return static_cast<char_type*>(memset(__s, __a, __n)); } |
|
static char_type |
to_char_type(const int_type& __c) |
{ return static_cast<char_type>(__c); } |
|
// To keep both the byte 0xff and the eof symbol 0xffffffff |
// from ending up as 0xffffffff. |
static int_type |
to_int_type(const char_type& __c) |
{ return static_cast<int_type>(static_cast<unsigned char>(__c)); } |
|
static bool |
eq_int_type(const int_type& __c1, const int_type& __c2) |
{ return __c1 == __c2; } |
|
static int_type |
eof() { return static_cast<int_type>(EOF); } |
|
static int_type |
not_eof(const int_type& __c) |
{ return (__c == eof()) ? 0 : __c; } |
}; |
|
|
#ifdef _GLIBCPP_USE_WCHAR_T |
template<> |
struct char_traits<wchar_t> |
{ |
typedef wchar_t char_type; |
typedef wint_t int_type; |
typedef streamoff off_type; |
typedef wstreampos pos_type; |
typedef mbstate_t state_type; |
|
static void |
assign(char_type& __c1, const char_type& __c2) |
{ __c1 = __c2; } |
|
static bool |
eq(const char_type& __c1, const char_type& __c2) |
{ return __c1 == __c2; } |
|
static bool |
lt(const char_type& __c1, const char_type& __c2) |
{ return __c1 < __c2; } |
|
static int |
compare(const char_type* __s1, const char_type* __s2, size_t __n) |
{ return wmemcmp(__s1, __s2, __n); } |
|
static size_t |
length(const char_type* __s) |
{ return wcslen(__s); } |
|
static const char_type* |
find(const char_type* __s, size_t __n, const char_type& __a) |
{ return wmemchr(__s, __a, __n); } |
|
static char_type* |
move(char_type* __s1, const char_type* __s2, int_type __n) |
{ return wmemmove(__s1, __s2, __n); } |
|
static char_type* |
copy(char_type* __s1, const char_type* __s2, size_t __n) |
{ return wmemcpy(__s1, __s2, __n); } |
|
static char_type* |
assign(char_type* __s, size_t __n, char_type __a) |
{ return wmemset(__s, __a, __n); } |
|
static char_type |
to_char_type(const int_type& __c) { return char_type(__c); } |
|
static int_type |
to_int_type(const char_type& __c) { return int_type(__c); } |
|
static bool |
eq_int_type(const int_type& __c1, const int_type& __c2) |
{ return __c1 == __c2; } |
|
static int_type |
eof() { return static_cast<int_type>(WEOF); } |
|
static int_type |
not_eof(const int_type& __c) |
{ return eq_int_type(__c, eof()) ? 0 : __c; } |
}; |
#endif //_GLIBCPP_USE_WCHAR_T |
|
template<typename _CharT, typename _Traits> |
struct _Char_traits_match |
{ |
_CharT _M_c; |
_Char_traits_match(_CharT const& __c) : _M_c(__c) { } |
|
bool |
operator()(_CharT const& __a) { return _Traits::eq(_M_c, __a); } |
}; |
} // namespace std |
|
#endif |