relation.h File Reference

#include "set.h"
#include "tuple.h"

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Classes
struct	Relation

Functions
Relation *	relation_create (const char *name)
	Create a new Relation.
int	relation_add_tuple (Relation *r, Tuple *t)
	Add a tuple to a relation.
void	relation_destroy (Relation *r)
	Destroy a Relation and free its memory.
void	relation_print (const Relation *r)
	Print a Relation to stdout.
Tuple *	relation_find_tuple (Relation *r, Tuple *t)
	Find a tuple in a relation matching the target.

Function Documentation

relation_add_tuple()

int relation_add_tuple	(	Relation *	r,
		Tuple *	t
	)

Add a tuple to a relation.

Parameters

r	Pointer to the Relation.
t	Pointer to the Tuple to add.

Returns

1 if added, 0 if already present, -1 on error.

relation_create()

Relation * relation_create

(

const char *

name

)

Create a new Relation.

Parameters

name	Name of the relation (copied).

Returns

Pointer to the new Relation, or NULL on failure.

relation_destroy()

void relation_destroy

(

Relation *

r

)

Destroy a Relation and free its memory.

Parameters

r	Pointer to the Relation to destroy. Safe to pass NULL.

relation_find_tuple()

Tuple * relation_find_tuple	(	Relation *	r,
		Tuple *	target
	)

Find a tuple in a relation matching the target.

Parameters

r	Pointer to the Relation.
target	Pointer to the Tuple to find.

Returns

Pointer to the found Tuple, or NULL if not found.

relation_print()

void relation_print

(

const Relation *

r

)

Print a Relation to stdout.

Parameters

r	Pointer to the Relation to print.