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// Character traits template for the -*- C++ -*- string classes.
// Copyright (C) 1994 Free Software Foundation
// This file is part of the GNU ANSI 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, if you link this library with files
// compiled with a GNU compiler to produce an executable, this does not 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.
// Written by Jason Merrill based upon the specification by Takanori Adachi
// in ANSI X3J16/94-0013R2.
#ifndef __STRING_CHAR_TRAITS__
#define __STRING_CHAR_TRAITS__
#ifdef __GNUG__
// For string_char_traits <char>
#pragma interface "std/straits.h"
#endif
#include <cstddef>
extern "C++" {
template <class charT>
struct string_char_traits {
typedef charT char_type; // for users to acquire the basic character type
// constraints
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 ne (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 char_type eos () { return char_type(); } // the null character
static bool is_del(char_type a) { return 0; }
// characteristic function for delimiters of charT
// speed-up functions
static int compare (const char_type* s1, const char_type* s2, size_t n)
{
size_t i;
for (i = 0; i < n; ++i)
if (ne (s1[i], s2[i]))
return lt (s1[i], s2[i]) ? -1 : 1;
return 0;
}
static size_t length (const char_type* s)
{
size_t l = 0;
while (ne (*s++, eos ()))
++l;
return l;
}
static char_type* copy (char_type* s1, const char_type* s2, size_t n)
{
for (; n--; )
assign (s1[n], s2[n]);
return s1;
}
static char_type* move (char_type* s1, const char_type* s2, size_t n)
{
char_type a[n];
size_t i;
for (i = 0; i < n; ++i)
assign (a[i], s2[i]);
for (i = 0; i < n; ++i)
assign (s1[i], a[i]);
return s1;
}
static char_type* set (char_type* s1, const char_type& c, size_t n)
{
for (; n--; )
assign (s1[n], c);
return s1;
}
};
class istream;
class ostream;
#include <cctype>
#include <cstring>
struct string_char_traits <char> {
typedef char char_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 ne (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 char_type eos () { return 0; }
static bool is_del(char_type a) { return isspace(a); }
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 char_type* copy (char_type* s1, const char_type* s2, size_t n)
{ return (char_type*) memcpy (s1, s2, n); }
static char_type* move (char_type* s1, const char_type* s2, size_t n)
{ return (char_type*) memmove (s1, s2, n); }
static char_type* set (char_type* s1, const char_type& c, size_t n)
{ return (char_type*) memset (s1, c, n); }
};
#if 0
#include <cwctype>
struct string_char_traits <wchar_t> {
typedef wchar_t char_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 ne (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 char_type eos () { return 0; }
static bool is_del(char_type a) { return iswspace(a); }
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 char_type* copy (char_type* s1, const char_type* s2, size_t n)
{ return wmemcpy (s1, s2, n); }
static char_type* set (char_type* s1, const char_type& c, size_t n)
{ return wmemset (s1, c, n); }
};
#endif
} // extern "C++"
#endif
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