libs-base/Testing/fref.m

/* Test/example program for the base library

   Copyright (C) 2005 Free Software Foundation, Inc.
   
  Copying and distribution of this file, with or without modification,
  are permitted in any medium without royalty provided the copyright
  notice and this notice are preserved.

   This file is part of the GNUstep Base Library.
*/
/* Test NSArchiver on encoding of self-referential forward references. */

#include <Foundation/NSArchiver.h>
#include <Foundation/NSArray.h>
#include <Foundation/NSAutoreleasePool.h>

/* This object encodes an -encodeConditionalObject: reference to a Foo. */
@interface SubFoo : NSObject
{
  id super_foo;
  int label;
}
@end

/* This object encodes an -encodeObject: reference to a SubFoo. */
@interface Foo : NSObject
{
  id sub_foo;
  int label;
}
- (int) label;
@end

@implementation SubFoo

- (void) dealloc
{
  RELEASE(super_foo);
  [super dealloc];
}

- (id) initWithSuperFoo: (id)o label: (int)l
{
  self = [super init];
  super_foo = RETAIN(o);
  label = l;
  return self;
}

- (id) superFoo
{
  return super_foo;
}

- (void) encodeWithCoder: (NSCoder*)coder
{
  printf ("In [SubFoo encodeWithCoder:]\n");
  [coder encodeConditionalObject: super_foo];
  [coder encodeValueOfObjCType: @encode(int)
	 at: &label];
}

- (id) initWithCoder: (NSCoder*)coder
{
  [coder decodeValueOfObjCType: @encode(id)
			    at: &super_foo];
  [coder decodeValueOfObjCType: @encode(int)
			    at: &label];
  return self;
}

- (void) print
{
  printf ("label = %d, super label = %d\n",
	  label, [super_foo label]);
}

@end

@implementation Foo

- (void) dealloc
{
  RELEASE(sub_foo);
  [super dealloc];
}

- (id) init
{
  self = [super init];
  sub_foo = nil;
  label = 0;
  return self;
}

- (void) setSubFoo: o
{
  ASSIGN(sub_foo, o);
}

- (id) subFoo
{
  return sub_foo;
}

- (void) encodeWithCoder: (NSCoder*)coder
{
  printf ("In [Foo encodeWithCoder:]\n");
  [coder encodeObject: sub_foo];
  [coder encodeValueOfObjCType: @encode(int)
	 at: &label];
}

- (id) initWithCoder: (NSCoder*)coder
{
  [coder decodeValueOfObjCType: @encode(id)
			    at: &sub_foo];
  [coder decodeValueOfObjCType: @encode(int)
			    at: &label];
  return self;
}

- (int) label
{
  return label;
}

- (void) setLabel: (int)l
{
  label = l;
}

@end

/* Test the use of -encodeConditional to encode a forward reference
   to an object. */
void
test_fref ()
{
  id array;
  id foo, sub_foo;
  printf ("\nTest encoding of forward references\n");

  array = [[NSMutableArray alloc] init];
  foo = [[Foo alloc] init];
  [foo setLabel: 4];
  sub_foo = [[SubFoo alloc] initWithSuperFoo: foo label: 3];
  [foo setSubFoo: sub_foo];
  [array addObject: foo];
  [array insertObject: sub_foo atIndex: 0];

  [NSArchiver archiveRootObject: array toFile: @"fref.dat"];
  printf ("Encoded:  ");
  [sub_foo print];
  RELEASE(foo);
  RELEASE(sub_foo);
  RELEASE(array);

  array = [NSUnarchiver unarchiveObjectWithFile: @"fref.dat"];
  foo = [array objectAtIndex: 1];
  sub_foo = [foo subFoo];
  printf ("Decoded:  ");
  [sub_foo print];
}

/* Test the encode of a self-referential forward reference. */
void
test_self_fref ()
{
  id foo, sub_foo;
  printf ("\nTest encoding of self-referential forward references\n");

  foo = [[Foo alloc] init];
  [foo setLabel: 4];
  sub_foo = [[SubFoo alloc] initWithSuperFoo: foo label: 3];
  [foo setSubFoo: sub_foo];

  [NSArchiver archiveRootObject: foo toFile: @"fref.dat"];
  printf ("Encoded:  ");
  [sub_foo print];
  RELEASE(foo);
  RELEASE(sub_foo);

  foo = [NSUnarchiver unarchiveObjectWithFile: @"fref.dat"];
  sub_foo = [foo subFoo];
  printf ("Decoded:  ");
  [sub_foo print];
}

int
main ()
{
  CREATE_AUTORELEASE_POOL(arp);

  test_fref ();
  test_self_fref ();

  RELEASE(arp);

  exit (0);
}