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char.c
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1999-01-02
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/* -*-C-*-
$Id: char.c,v 9.33 1999/01/02 06:11:34 cph Exp $
Copyright (c) 1987-1999 Massachusetts Institute of Technology
This program 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 of the License, or (at
your option) any later version.
This program 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 program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Character primitives. */
#include "scheme.h"
#include "prims.h"
#include <ctype.h>
long
DEFUN (arg_ascii_char, (n), int n)
{
CHECK_ARG (n, CHARACTER_P);
{
fast SCHEME_OBJECT object = (ARG_REF (n));
if (! (CHAR_TO_ASCII_P (object)))
error_bad_range_arg (n);
return (CHAR_TO_ASCII (object));
}
}
long
DEFUN (arg_ascii_integer, (n), int n)
{
return (arg_index_integer (n, MAX_ASCII));
}
DEFINE_PRIMITIVE ("CHAR?", Prim_char_p, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
PRIMITIVE_RETURN (BOOLEAN_TO_OBJECT (CHARACTER_P (ARG_REF (1))));
}
DEFINE_PRIMITIVE ("MAKE-CHAR", Prim_make_char, 2, 2, 0)
{
PRIMITIVE_HEADER (2);
PRIMITIVE_RETURN
(MAKE_CHAR ((arg_index_integer (2, MAX_BITS)),
(arg_index_integer (1, MAX_CODE))));
}
DEFINE_PRIMITIVE ("CHAR-BITS", Prim_char_bits, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
CHECK_ARG (1, CHARACTER_P);
PRIMITIVE_RETURN (LONG_TO_UNSIGNED_FIXNUM (CHAR_BITS (ARG_REF (1))));
}
DEFINE_PRIMITIVE ("CHAR-CODE", Prim_char_code, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
CHECK_ARG (1, CHARACTER_P);
PRIMITIVE_RETURN (LONG_TO_UNSIGNED_FIXNUM (CHAR_CODE (ARG_REF (1))));
}
DEFINE_PRIMITIVE ("CHAR->INTEGER", Prim_char_to_integer, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
CHECK_ARG (1, CHARACTER_P);
PRIMITIVE_RETURN
(LONG_TO_UNSIGNED_FIXNUM ((ARG_REF (1)) & MASK_MIT_ASCII));
}
DEFINE_PRIMITIVE ("INTEGER->CHAR", Prim_integer_to_char, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
PRIMITIVE_RETURN
(MAKE_OBJECT (TC_CHARACTER, (arg_index_integer (1, MAX_MIT_ASCII))));
}
long
DEFUN (char_downcase, (c), fast long c)
{
return ((isupper (c)) ? ((c - 'A') + 'a') : c);
}
long
DEFUN (char_upcase, (c), fast long c)
{
return ((islower (c)) ? ((c - 'a') + 'A') : c);
}
DEFINE_PRIMITIVE ("CHAR-DOWNCASE", Prim_char_downcase, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
CHECK_ARG (1, CHARACTER_P);
PRIMITIVE_RETURN
(MAKE_CHAR ((CHAR_BITS (ARG_REF (1))),
(char_downcase (CHAR_CODE (ARG_REF (1))))));
}
DEFINE_PRIMITIVE ("CHAR-UPCASE", Prim_char_upcase, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
CHECK_ARG (1, CHARACTER_P);
PRIMITIVE_RETURN
(MAKE_CHAR ((CHAR_BITS (ARG_REF (1))),
(char_upcase (CHAR_CODE (ARG_REF (1))))));
}
DEFINE_PRIMITIVE ("ASCII->CHAR", Prim_ascii_to_char, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
PRIMITIVE_RETURN (ASCII_TO_CHAR (arg_index_integer (1, MAX_ASCII)));
}
DEFINE_PRIMITIVE ("CHAR->ASCII", Prim_char_to_ascii, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
PRIMITIVE_RETURN (LONG_TO_UNSIGNED_FIXNUM (arg_ascii_char (1)));
}
DEFINE_PRIMITIVE ("CHAR-ASCII?", Prim_char_ascii_p, 1, 1, 0)
{
PRIMITIVE_HEADER (1);
CHECK_ARG (1, CHARACTER_P);
{
fast SCHEME_OBJECT character = ARG_REF (1);
PRIMITIVE_RETURN
(((OBJECT_DATUM (character)) >= MAX_ASCII) ?
SHARP_F :
(LONG_TO_UNSIGNED_FIXNUM (CHAR_TO_ASCII (character))));
}
}