/*
    Copyright (c) 1998, 1999, 2000, 2001, 2003, 2004 Benhur Stein
    
    This file is part of Pajé.

    Pajé is free software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License as published by the
    Free Software Foundation; either version 2 of the License, or (at your
    option) any later version.

    Pajé 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 Lesser General Public License
    for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with Pajé; if not, write to the Free Software Foundation, Inc.,
    59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
//
// SourceCodeReference
//
// Contains a reference to a source line in a file.
//

#include "SourceCodeReference.h"
#include "Macros.h"

@implementation SourceCodeReference

NSMutableSet *allReferences;

+ (void)initialize
{
    allReferences = [[NSMutableSet alloc] init]; // never released!
}

+ (SourceCodeReference *)referenceToFilename:(NSString *)name
                                  lineNumber:(int)line
{
    return [[[self alloc] initWithFilename:name lineNumber:line] autorelease];
}

- (id)initWithFilename:(NSString *)name
            lineNumber:(int)line
{
    self = [super init];
    if (self != nil) {
        id obj;
        Assign(filename, name);
        lineNumber = line;
        obj = [allReferences member:self];
        if (obj == nil) {
            [allReferences addObject:self];
        } else {
            Assign(self, obj);
        }
    }
    return self;
}

- (void)dealloc
{
    Assign(filename, nil);
    [super dealloc];
}

//
// accessors
//

- (NSString *)filename
{
    return filename;
}

- (NSInteger)lineNumber
{
    return lineNumber;
}


- (NSString *)description
{
    return [NSString stringWithFormat:@"%@:%d", filename, lineNumber];
}

//
// it can be hashed (NSObject protocol)
//
- (unsigned)hash
{
    return lineNumber;
}

- (BOOL)isEqual:(id)object
{
    if ((self == object)
        || ([object isKindOfClass:[SourceCodeReference class]]
            && lineNumber == [object lineNumber]
            && [filename isEqual:[object filename]]))
        return YES;
    return NO;
}

- (id)copyWithZone:(NSZone *)zone
{
    return [self retain];
}


// NSCoding Protocol
- (void)encodeWithCoder:(NSCoder *)coder
{
//    [super encodeWithCoder:coder];
    [coder encodeValuesOfObjCTypes:"@i", &filename, &lineNumber];
}

- (id)initWithCoder:(NSCoder *)coder
{
    self = [super init];//WithCoder:coder];
    [coder decodeValuesOfObjCTypes:"@i", &filename, &lineNumber];
    return self;
}
@end
