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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 "MLKDynamicContext.h"
#import "MLKPackage.h"
#import "MLKReader.h"
#import "MLKReadtable.h"
#import "MLKSymbol.h"
#import "runtime-compatibility.h"
#import "util.h"
#import <Foundation/NSException.h>
#import <Foundation/NSString.h>
@implementation MLKSymbol
-(MLKSymbol *) initWithName:(id)aName package:(id)aPackage
{
self = [super init];
LASSIGN (name, aName);
LASSIGN (homePackage, aPackage);
real_identity = nil;
return self;
}
+(MLKSymbol *) symbolWithName:(id)aName package:(id)aPackage
{
return LAUTORELEASE ([[self alloc] initWithName:aName package:aPackage]);
}
-(id) copyWithZone:(NSZone *)zone
{
MLKSymbol *copy = [MLKSymbol allocWithZone:zone];
LASSIGN (copy->name, name);
LASSIGN (copy->homePackage, homePackage);
if (real_identity)
LASSIGN (copy->real_identity, real_identity);
else
LASSIGN (copy->real_identity, self);
return copy;
}
-(NSString *) name
{
return name;
}
-(MLKPackage *) homePackage
{
return homePackage;
}
-(void) setHomePackage:(MLKPackage *)aPackage
{
LASSIGN (homePackage, aPackage);
}
-(NSString *) descriptionForLisp
{
// NOTE: Need to take *PRINT-GENSYM* into account.
//
// FIXME: This is wrong in more than one way.
MLKDynamicContext *dynctx = [MLKDynamicContext currentContext];
MLKPackage *cl = [MLKPackage findPackage:@"COMMON-LISP"];
MLKPackage *currentPackage = [dynctx valueForSymbol:[cl intern:@"*PACKAGE*"]];
MLKReadtable *readtable = [dynctx valueForSymbol:[cl intern:@"*READTABLE*"]];
BOOL accessible;
NSString *packagePrefix;
NSString *printName;
BOOL escaped;
int i;
int base = [[dynctx valueForSymbol:[cl intern:@"*PRINT-BASE*"]] intValue];
escaped = NO;
if ([MLKReader isPotentialNumber:name readtable:readtable base:base])
escaped = YES;
if ([name length] == 0)
escaped = YES;
for (i = 0; i < [name length]; i++)
{
unichar ch = [name characterAtIndex:i];
escaped =
escaped \
|| ![readtable isConstituentCharacter:ch] \
|| ![[[NSString stringWithFormat:@"%C", ch] uppercaseString]
isEqualToString:[NSString stringWithFormat:@"%C", ch]];
}
if (escaped)
{
NSMutableString *tmp = [NSMutableString stringWithString:name];
[tmp replaceOccurrencesOfString:@"\\"
withString:@"\\\\"
options:NSLiteralSearch
range:NSMakeRange(0, [tmp length])];
[tmp replaceOccurrencesOfString:@"|"
withString:@"\\|"
options:NSLiteralSearch
range:NSMakeRange(0, [tmp length])];
printName = [NSString stringWithFormat:@"|%@|", tmp];
}
else
printName = name;
NS_DURING
{
if ([currentPackage findSymbol:name] == self)
accessible = YES;
else
accessible = NO;
}
NS_HANDLER
{
if ([[localException name] isEqualToString:@"MLKNoSuchSymbolError"])
accessible = NO;
else
[localException raise];
}
NS_ENDHANDLER;
if (homePackage == [MLKPackage findPackage:@"KEYWORD"])
packagePrefix = @":";
else if (!homePackage)
packagePrefix = @"#:";
else if (accessible)
packagePrefix = [NSString string];
else
packagePrefix = [NSString stringWithFormat:@"|%@|%s",
[homePackage name],
([[homePackage exportedSymbols] containsObject:self]
? ":"
: "::")];
return [NSString stringWithFormat:@"%@%@", packagePrefix, printName];
}
-(NSString *) description
{
return MLKPrintToString(self);
}
-(BOOL) isEqual:(id)object
{
if (object == self)
return YES;
if (!([object isKindOfClass:[MLKSymbol class]]))
return NO;
return ((((MLKSymbol *)object)->real_identity
? ((MLKSymbol *)object)->real_identity
: (MLKSymbol *)object)
== ((self->real_identity != nil
? self->real_identity
: self)));
}
-(unsigned) hash
{
if (real_identity)
return [real_identity hash];
else
return [super hash];
}
-(void) dealloc
{
LRELEASE (name);
LRELEASE (homePackage);
[super dealloc];
}
@end
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