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95 lines
3.3 KiB
C
95 lines
3.3 KiB
C
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/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#ifndef __G_REL_H__
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#define __G_REL_H__
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#include <gtypes.h>
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G_BEGIN_DECLS
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typedef struct _GRelation GRelation;
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typedef struct _GTuples GTuples;
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struct _GTuples
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{
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guint len;
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};
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/* GRelation
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*
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* Indexed Relations. Imagine a really simple table in a
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* database. Relations are not ordered. This data type is meant for
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* maintaining a N-way mapping.
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*
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* g_relation_new() creates a relation with FIELDS fields
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*
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* g_relation_destroy() frees all resources
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* g_tuples_destroy() frees the result of g_relation_select()
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*
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* g_relation_index() indexes relation FIELD with the provided
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* equality and hash functions. this must be done before any
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* calls to insert are made.
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*
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* g_relation_insert() inserts a new tuple. you are expected to
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* provide the right number of fields.
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*
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* g_relation_delete() deletes all relations with KEY in FIELD
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* g_relation_select() returns ...
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* g_relation_count() counts ...
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*/
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GRelation* g_relation_new (gint fields);
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void g_relation_destroy (GRelation *relation);
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void g_relation_index (GRelation *relation,
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gint field,
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GHashFunc hash_func,
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GCompareFunc key_compare_func);
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void g_relation_insert (GRelation *relation,
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...);
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gint g_relation_delete (GRelation *relation,
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gconstpointer key,
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gint field);
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GTuples* g_relation_select (GRelation *relation,
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gconstpointer key,
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gint field);
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gint g_relation_count (GRelation *relation,
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gconstpointer key,
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gint field);
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gboolean g_relation_exists (GRelation *relation,
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...);
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void g_relation_print (GRelation *relation);
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void g_tuples_destroy (GTuples *tuples);
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gpointer g_tuples_index (GTuples *tuples,
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gint index,
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gint field);
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G_END_DECLS
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#endif /* __G_REL_H__ */
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