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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 "MLKPackage.h"
#import "MLKSymbol.h"
#import "MLKError.h"
#import <Foundation/NSDictionary.h>
#import <Foundation/NSSet.h>
#import <Foundation/NSString.h>
#import <Foundation/NSArray.h>
static NSMutableDictionary *packages = nil;
@implementation MLKPackage : MLKLispValue
-(MLKPackage *) initWithName:(NSString *)name
nicknames:(NSSet *)nicknames
{
int i;
NSArray *e;
self = [self init];
// FIXME: Make this thread-safe.
if (!packages)
packages = [[NSMutableDictionary alloc] init];
[packages setObject:self forKey:name];
e = [nicknames allObjects];
for (i = 0; i < [e count]; i++)
{
[packages setObject:self forKey:[e objectAtIndex:i]];
}
_symbols = [[NSMutableDictionary alloc] init];
_exported_symbols = [[NSMutableSet alloc] init];
_shadowed_symbols = [[NSMutableSet alloc] init];
_nicknames = [[NSMutableSet alloc] initWithSet:nicknames];
ASSIGN (_name, name);
return self;
}
+(MLKPackage *)findPackage:(NSString *)name
{
return [packages objectForKey:name];
}
-(void) usePackage:(MLKPackage *)aPackage
{
int i;
NSArray *symbols;
symbols = [[aPackage allSymbols] allObjects];
for (i = 0; i < [symbols count]; i++)
[self import:[symbols objectAtIndex:i]];
}
-(void) import:(MLKSymbol *)aSymbol
{
// FIXME: Check for conflicts.
// FIXME: What to do about exported and shadowed symbols that conflict
// with the new one?
[_symbols setObject:aSymbol forKey:[aSymbol name]];
}
-(void) shadow:(MLKSymbol *)aSymbol
{
[_shadowed_symbols addObject:aSymbol];
}
-(void) unintern:(MLKSymbol *)aSymbol
{
[_symbols removeObjectForKey:[aSymbol name]];
}
-(MLKSymbol *) intern:(NSString *)symbolName
{
if ([[_symbols allKeys] containsObject:symbolName])
return [_symbols objectForKey:symbolName];
else
{
MLKSymbol *symbol = [[MLKSymbol alloc] initWithName:symbolName
package:self];
[_symbols setObject:symbol forKey:symbolName];
return symbol;
}
}
-(MLKSymbol *) findSymbol:(NSString *)symbolName
{
if ([[_symbols allKeys] containsObject:symbolName])
return [_symbols objectForKey:symbolName];
else
[[MLKError errorWithMessage:@"Symbol not found."] raise];
return nil;
}
-(NSString *) name
{
return _name;
}
-(NSSet *) nicknames
{
return _nicknames;
}
-(NSSet *) exportedSymbols
{
return _exported_symbols;
}
-(NSSet *) shadowedSymbols
{
return _shadowed_symbols;
}
-(NSSet *) allSymbols
{
return [NSSet setWithArray:[_symbols allValues]];
}
@end
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