1 grel.h |
1 /* GLIB - Library of useful routines for C programming |
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2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
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3 * Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
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4 * |
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5 * This library is free software; you can redistribute it and/or |
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6 * modify it under the terms of the GNU Lesser General Public |
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7 * License as published by the Free Software Foundation; either |
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8 * version 2 of the License, or (at your option) any later version. |
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9 * |
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10 * This library is distributed in the hope that it will be useful, |
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 * Lesser General Public License for more details. |
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14 * |
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15 * You should have received a copy of the GNU Lesser General Public |
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16 * License along with this library; if not, write to the |
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17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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18 * Boston, MA 02111-1307, USA. |
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19 */ |
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20 |
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21 /* |
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22 * Modified by the GLib Team and others 1997-2000. See the AUTHORS |
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23 * file for a list of people on the GLib Team. See the ChangeLog |
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24 * files for a list of changes. These files are distributed with |
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25 * GLib at ftp://ftp.gtk.org/pub/gtk/. |
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26 */ |
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27 |
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28 #ifndef __G_REL_H__ |
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29 #define __G_REL_H__ |
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30 |
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31 #include <_ansi.h> |
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32 #include <glib/gtypes.h> |
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33 |
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34 G_BEGIN_DECLS |
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35 |
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36 typedef struct _GRelation GRelation; |
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37 typedef struct _GTuples GTuples; |
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38 |
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39 struct _GTuples |
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40 { |
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41 guint len; |
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42 }; |
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43 |
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44 /* GRelation |
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45 * |
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46 * Indexed Relations. Imagine a really simple table in a |
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47 * database. Relations are not ordered. This data type is meant for |
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48 * maintaining a N-way mapping. |
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49 * |
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50 * g_relation_new() creates a relation with FIELDS fields |
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51 * |
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52 * g_relation_destroy() frees all resources |
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53 * g_tuples_destroy() frees the result of g_relation_select() |
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54 * |
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55 * g_relation_index() indexes relation FIELD with the provided |
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56 * equality and hash functions. this must be done before any |
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57 * calls to insert are made. |
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58 * |
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59 * g_relation_insert() inserts a new tuple. you are expected to |
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60 * provide the right number of fields. |
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61 * |
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62 * g_relation_delete() deletes all relations with KEY in FIELD |
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63 * g_relation_select() returns ... |
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64 * g_relation_count() counts ... |
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65 */ |
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66 |
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67 IMPORT_C GRelation* g_relation_new (gint fields); |
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68 IMPORT_C void g_relation_destroy (GRelation *relation); |
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69 IMPORT_C void g_relation_index (GRelation *relation, |
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70 gint field, |
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71 GHashFunc hash_func, |
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72 GEqualFunc key_equal_func); |
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73 IMPORT_C void g_relation_insert (GRelation *relation, |
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74 ...); |
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75 IMPORT_C gint g_relation_delete (GRelation *relation, |
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76 gconstpointer key, |
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77 gint field); |
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78 IMPORT_C GTuples* g_relation_select (GRelation *relation, |
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79 gconstpointer key, |
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80 gint field); |
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81 IMPORT_C gint g_relation_count (GRelation *relation, |
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82 gconstpointer key, |
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83 gint field); |
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84 IMPORT_C gboolean g_relation_exists (GRelation *relation, |
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85 ...); |
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86 IMPORT_C void g_relation_print (GRelation *relation); |
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87 |
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88 IMPORT_C void g_tuples_destroy (GTuples *tuples); |
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89 IMPORT_C gpointer g_tuples_index (GTuples *tuples, |
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90 gint index_, |
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91 gint field); |
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92 |
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93 G_END_DECLS |
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94 |
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95 #endif /* __G_REL_H__ */ |
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96 |