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/* -*- mode: objc; coding: utf-8 -*- */
/* Étoilisp/Mulklisp, a Common Lisp subset for the Étoilé runtime.
* Copyright (C) 2008 Matthias Andreas Benkard.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#import "MLKReadtable.h"
#import "MLKCharacter.h"
#import <Foundation/NSDictionary.h>
#import <Foundation/NSValue.h>
#define CONSTITUENT 0
#define WHITESPACE 1
#define TERMINATING_MACRO 2
#define NONTERMINATING_MACRO 3
#define SINGLE_ESCAPE 4
#define MULTI_ESCAPE 5
@implementation MLKReadtable
-(MLKReadtable *) initSuper
{
return [super init];
}
-(MLKReadtable *) init
{
self = [super init];
_syntaxTable = [[NSMutableDictionary alloc] init];
_readerMacros = [[NSMutableDictionary alloc] init];
_case = MLKReadtableCase_UPCASE;
return self;
}
-(MLKReadtable *) copyWithZone:(NSZone *)zone
{
MLKReadtable *copy = [[MLKReadtable allocWithZone:zone] initSuper];
copy->_syntaxTable = [_syntaxTable mutableCopyWithZone:zone];
copy->_readerMacros = [_readerMacros mutableCopyWithZone:zone];
copy->_case = _case;
return copy;
}
-(BOOL) isWhitespaceCharacter:(unichar)ch
{
return ([[_syntaxTable objectForKey:[NSNumber numberWithLong:ch]]
isEqual:[NSNumber numberWithShort:WHITESPACE]]);
}
-(BOOL) isMacroCharacter:(unichar)ch;
{
return ([self isNonTerminatingMacroCharacter:ch] ||
[self isTerminatingMacroCharacter:ch]);
}
-(BOOL) isNonTerminatingMacroCharacter:(unichar)ch;
{
return ([[_syntaxTable objectForKey:[NSNumber numberWithLong:ch]]
isEqual:[NSNumber numberWithShort:NONTERMINATING_MACRO]]);
}
-(BOOL) isTerminatingMacroCharacter:(unichar)ch;
{
return ([[_syntaxTable objectForKey:[NSNumber numberWithLong:ch]]
isEqual:[NSNumber numberWithShort:TERMINATING_MACRO]]);
}
-(BOOL) isSingleEscapeCharacter:(unichar)ch;
{
return ([[_syntaxTable objectForKey:[NSNumber numberWithLong:ch]]
isEqual:[NSNumber numberWithShort:SINGLE_ESCAPE]]);
}
-(BOOL) isMultipleEscapeCharacter:(unichar)ch;
{
return ([[_syntaxTable objectForKey:[NSNumber numberWithLong:ch]]
isEqual:[NSNumber numberWithShort:MULTI_ESCAPE]]);
}
-(BOOL) isConstituentCharacter:(unichar)ch;
{
return ([[_syntaxTable objectForKey:[NSNumber numberWithLong:ch]]
isEqual:[NSNumber numberWithShort:CONSTITUENT]]);
}
-(BOOL) characterHasCase:(unichar)ch
{
return (![[[NSString stringWithFormat:@"%C", ch] uppercaseString]
isEqual:[[NSString stringWithFormat:@"%C", ch] lowercaseString]]);
}
-(MLKFuncallable *) macroFunctionForCharacter:(unichar)ch;
{
return [_readerMacros objectForKey:[NSNumber numberWithLong:ch]];
}
-(unichar) charWithReadtableCase:(unichar)ch
{
switch (_case)
{
case MLKReadtableCase_PRESERVE:
return ch;
case MLKReadtableCase_UPCASE:
return [MLKCharacter uppercaseCharForChar:ch];
case MLKReadtableCase_DOWNCASE:
return [MLKCharacter lowercaseCharForChar:ch];
case MLKReadtableCase_INVERT:
{
unichar upCh;
upCh = [MLKCharacter uppercaseCharForChar:ch];
if (ch == upCh)
return [MLKCharacter lowercaseCharForChar:ch];
else
return upCh;
}
}
return 0;
}
@end
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