attribute.c File Reference

Attribute implementation for the Relational Algebra Engine. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "attribute.h"
#include "set.h"

Include dependency graph for attribute.c:

Functions
Attribute *	attribute_create (const char *name, AttributeType type, void *value)
	Create a new Attribute.
void	attribute_destroy (Attribute *attr)
	Destroy an Attribute and free its memory.
void	attribute_print (const Attribute *attr)
	Print an Attribute to stdout.

Detailed Description

Attribute implementation for the Relational Algebra Engine.

Handles creation, destruction, and printing of attributes, which are name-value pairs used as the basic building blocks of tuples in the relational model.

Function Documentation

attribute_create()

Attribute * attribute_create	(	const char *	name,
		AttributeType	type,
		void *	value
	)

Create a new Attribute.

Parameters

name	Name of the attribute (copied).
type	Type of the attribute (see AttributeType).
value	Pointer to the value (ownership is taken).

Returns

Pointer to the new Attribute, or NULL on failure.

attribute_destroy()

void attribute_destroy

(

Attribute *

attr

)

Destroy an Attribute and free its memory.

Parameters

attr	Pointer to the Attribute to destroy. Safe to pass NULL.

attribute_print()

void attribute_print

(

const Attribute *

attr

)

Print an Attribute to stdout.

Parameters

attr	Pointer to the Attribute to print.