glib/grel.h
Sebastian Wilhelmi 267b681370 Introduced new function type GEqualFunc to return TRUE for equal params.
2000-10-30  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* gcache.h, gcache.c, ghash.h, ghash.c, grel.c, grel.h, gtypes.h:
	Introduced new function type GEqualFunc to return TRUE for equal
	params. This is now used instead of GCompareFunc (which should
	work akin to strcmp) here. This kind of fixes Bug #14412. Note
	that technically GCompareFunc and GEqualFunc are still the same
	types, as gint == gboolean.

	* ghash.h, gutils.c: g_int_equal and g_direct_equal now return
	gboolean to be really become GEqualFunc.

	* gscanner.c, testglib.c, tests/hash-test.c: Some tiny changes to
	follow the above change.
2000-10-30 14:34:52 +00:00

95 lines
3.3 KiB
C

/* GLIB - Library of useful routines for C programming
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library 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.
*
* This library 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 this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
#ifndef __G_REL_H__
#define __G_REL_H__
#include <gtypes.h>
G_BEGIN_DECLS
typedef struct _GRelation GRelation;
typedef struct _GTuples GTuples;
struct _GTuples
{
guint len;
};
/* GRelation
*
* Indexed Relations. Imagine a really simple table in a
* database. Relations are not ordered. This data type is meant for
* maintaining a N-way mapping.
*
* g_relation_new() creates a relation with FIELDS fields
*
* g_relation_destroy() frees all resources
* g_tuples_destroy() frees the result of g_relation_select()
*
* g_relation_index() indexes relation FIELD with the provided
* equality and hash functions. this must be done before any
* calls to insert are made.
*
* g_relation_insert() inserts a new tuple. you are expected to
* provide the right number of fields.
*
* g_relation_delete() deletes all relations with KEY in FIELD
* g_relation_select() returns ...
* g_relation_count() counts ...
*/
GRelation* g_relation_new (gint fields);
void g_relation_destroy (GRelation *relation);
void g_relation_index (GRelation *relation,
gint field,
GHashFunc hash_func,
GEqualFunc key_equal_func);
void g_relation_insert (GRelation *relation,
...);
gint g_relation_delete (GRelation *relation,
gconstpointer key,
gint field);
GTuples* g_relation_select (GRelation *relation,
gconstpointer key,
gint field);
gint g_relation_count (GRelation *relation,
gconstpointer key,
gint field);
gboolean g_relation_exists (GRelation *relation,
...);
void g_relation_print (GRelation *relation);
void g_tuples_destroy (GTuples *tuples);
gpointer g_tuples_index (GTuples *tuples,
gint index,
gint field);
G_END_DECLS
#endif /* __G_REL_H__ */