author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 02:56:42 +0300 | |
changeset 68 | ff3fc7722556 |
parent 18 | 47c74d1534e1 |
permissions | -rw-r--r-- |
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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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* Portions copyright (c) 2006-2009 Nokia Corporation. All rights reserved. |
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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 Free |
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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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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/* |
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* MT safe |
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*/ |
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#include "config.h" |
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#include <stdarg.h> |
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#include <string.h> |
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#include "glib.h" |
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#include "galias.h" |
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typedef struct _GRealTuples GRealTuples; |
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struct _GRelation |
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{ |
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gint fields; |
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gint current_field; |
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GHashTable *all_tuples; |
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GHashTable **hashed_tuple_tables; |
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gint count; |
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}; |
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struct _GRealTuples |
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{ |
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gint len; |
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gint width; |
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gpointer *data; |
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}; |
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static gboolean |
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tuple_equal_2 (gconstpointer v_a, |
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gconstpointer v_b) |
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{ |
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gpointer* a = (gpointer*) v_a; |
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gpointer* b = (gpointer*) v_b; |
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return a[0] == b[0] && a[1] == b[1]; |
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} |
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static guint |
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tuple_hash_2 (gconstpointer v_a) |
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{ |
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#if GLIB_SIZEOF_VOID_P > GLIB_SIZEOF_LONG |
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/* In practise this snippet has been written for 64-bit Windows |
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* where ints are 32 bits, pointers 64 bits. More exotic platforms |
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* need more tweaks. |
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*/ |
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guint* a = (guint*) v_a; |
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return (a[0] ^ a[1] ^ a[2] ^ a[3]); |
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#else |
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gpointer* a = (gpointer*) v_a; |
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return (gulong)a[0] ^ (gulong)a[1]; |
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#endif |
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} |
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static GHashFunc |
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tuple_hash (gint fields) |
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{ |
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switch (fields) |
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{ |
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case 2: |
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return tuple_hash_2; |
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default: |
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g_error ("no tuple hash for %d", fields); |
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} |
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return NULL; |
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} |
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static GEqualFunc |
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tuple_equal (gint fields) |
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{ |
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105 |
switch (fields) |
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106 |
{ |
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107 |
case 2: |
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return tuple_equal_2; |
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109 |
default: |
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g_error ("no tuple equal for %d", fields); |
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111 |
} |
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112 |
|
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return NULL; |
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114 |
} |
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115 |
|
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116 |
EXPORT_C GRelation* |
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117 |
g_relation_new (gint fields) |
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118 |
{ |
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GRelation* rel = g_new0 (GRelation, 1); |
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120 |
|
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rel->fields = fields; |
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rel->all_tuples = g_hash_table_new (tuple_hash (fields), tuple_equal (fields)); |
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rel->hashed_tuple_tables = g_new0 (GHashTable*, fields); |
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124 |
|
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return rel; |
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126 |
} |
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127 |
|
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128 |
static void |
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129 |
relation_delete_value_tuple (gpointer tuple_key, |
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gpointer tuple_value, |
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131 |
gpointer user_data) |
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132 |
{ |
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GRelation *relation = user_data; |
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134 |
gpointer *tuple = tuple_value; |
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135 |
g_slice_free1 (relation->fields * sizeof (gpointer), tuple); |
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136 |
} |
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137 |
|
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138 |
static void |
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139 |
g_relation_free_array (gpointer key, gpointer value, gpointer user_data) |
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140 |
{ |
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141 |
g_hash_table_destroy ((GHashTable*) value); |
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142 |
} |
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143 |
|
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144 |
EXPORT_C void |
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145 |
g_relation_destroy (GRelation *relation) |
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146 |
{ |
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147 |
gint i; |
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148 |
|
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149 |
if (relation) |
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150 |
{ |
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151 |
for (i = 0; i < relation->fields; i += 1) |
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152 |
{ |
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153 |
if (relation->hashed_tuple_tables[i]) |
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154 |
{ |
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155 |
g_hash_table_foreach (relation->hashed_tuple_tables[i], g_relation_free_array, NULL); |
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156 |
g_hash_table_destroy (relation->hashed_tuple_tables[i]); |
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157 |
} |
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158 |
} |
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159 |
|
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160 |
g_hash_table_foreach (relation->all_tuples, relation_delete_value_tuple, relation); |
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161 |
g_hash_table_destroy (relation->all_tuples); |
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|
162 |
|
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163 |
g_free (relation->hashed_tuple_tables); |
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164 |
g_free (relation); |
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165 |
} |
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166 |
} |
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|
167 |
|
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168 |
EXPORT_C void |
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169 |
g_relation_index (GRelation *relation, |
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170 |
gint field, |
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171 |
GHashFunc hash_func, |
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172 |
GEqualFunc key_equal_func) |
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173 |
{ |
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174 |
g_return_if_fail (relation != NULL); |
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|
175 |
|
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176 |
g_return_if_fail (relation->count == 0 && relation->hashed_tuple_tables[field] == NULL); |
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|
177 |
|
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178 |
relation->hashed_tuple_tables[field] = g_hash_table_new (hash_func, key_equal_func); |
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179 |
} |
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180 |
|
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181 |
EXPORT_C void |
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182 |
g_relation_insert (GRelation *relation, |
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183 |
...) |
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184 |
{ |
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185 |
gpointer* tuple = g_slice_alloc (relation->fields * sizeof (gpointer)); |
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186 |
va_list args; |
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187 |
gint i; |
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188 |
|
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189 |
va_start (args, relation); |
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|
190 |
|
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191 |
for (i = 0; i < relation->fields; i += 1) |
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192 |
tuple[i] = va_arg (args, gpointer); |
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|
193 |
|
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194 |
va_end (args); |
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195 |
|
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196 |
g_hash_table_insert (relation->all_tuples, tuple, tuple); |
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|
197 |
|
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198 |
relation->count += 1; |
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199 |
|
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200 |
for (i = 0; i < relation->fields; i += 1) |
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201 |
{ |
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202 |
GHashTable *table; |
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203 |
gpointer key; |
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204 |
GHashTable *per_key_table; |
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205 |
|
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206 |
table = relation->hashed_tuple_tables[i]; |
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207 |
|
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208 |
if (table == NULL) |
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209 |
continue; |
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210 |
|
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key = tuple[i]; |
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per_key_table = g_hash_table_lookup (table, key); |
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213 |
|
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if (per_key_table == NULL) |
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215 |
{ |
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per_key_table = g_hash_table_new (tuple_hash (relation->fields), tuple_equal (relation->fields)); |
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g_hash_table_insert (table, key, per_key_table); |
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} |
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219 |
|
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g_hash_table_insert (per_key_table, tuple, tuple); |
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} |
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} |
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223 |
|
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static void |
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g_relation_delete_tuple (gpointer tuple_key, |
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gpointer tuple_value, |
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gpointer user_data) |
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228 |
{ |
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gpointer *tuple = (gpointer*) tuple_value; |
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GRelation *relation = (GRelation *) user_data; |
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gint j; |
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232 |
|
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g_assert (tuple_key == tuple_value); |
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234 |
|
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for (j = 0; j < relation->fields; j += 1) |
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236 |
{ |
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GHashTable *one_table = relation->hashed_tuple_tables[j]; |
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gpointer one_key; |
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GHashTable *per_key_table; |
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240 |
|
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if (one_table == NULL) |
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continue; |
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243 |
|
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if (j == relation->current_field) |
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/* can't delete from the table we're foreaching in */ |
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continue; |
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247 |
|
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one_key = tuple[j]; |
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249 |
|
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per_key_table = g_hash_table_lookup (one_table, one_key); |
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251 |
|
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g_hash_table_remove (per_key_table, tuple); |
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253 |
} |
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254 |
|
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if (g_hash_table_remove (relation->all_tuples, tuple)) |
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g_slice_free1 (relation->fields * sizeof (gpointer), tuple); |
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|
257 |
|
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relation->count -= 1; |
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259 |
} |
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260 |
|
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261 |
EXPORT_C gint |
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g_relation_delete (GRelation *relation, |
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gconstpointer key, |
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gint field) |
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265 |
{ |
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GHashTable *table; |
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GHashTable *key_table; |
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gint count; |
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269 |
|
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g_return_val_if_fail (relation != NULL, 0); |
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271 |
|
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table = relation->hashed_tuple_tables[field]; |
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count = relation->count; |
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274 |
|
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g_return_val_if_fail (table != NULL, 0); |
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|
276 |
|
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key_table = g_hash_table_lookup (table, key); |
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|
278 |
|
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if (!key_table) |
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return 0; |
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281 |
|
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relation->current_field = field; |
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|
283 |
|
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g_hash_table_foreach (key_table, g_relation_delete_tuple, relation); |
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|
285 |
|
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g_hash_table_remove (table, key); |
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|
287 |
|
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g_hash_table_destroy (key_table); |
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|
289 |
|
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/* @@@ FIXME: Remove empty hash tables. */ |
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291 |
|
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return count - relation->count; |
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} |
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|
294 |
|
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static void |
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g_relation_select_tuple (gpointer tuple_key, |
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gpointer tuple_value, |
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gpointer user_data) |
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299 |
{ |
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gpointer *tuple = (gpointer*) tuple_value; |
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GRealTuples *tuples = (GRealTuples*) user_data; |
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gint stride = sizeof (gpointer) * tuples->width; |
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303 |
|
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g_assert (tuple_key == tuple_value); |
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|
305 |
|
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|
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memcpy (tuples->data + (tuples->len * tuples->width), |
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|
307 |
tuple, |
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stride); |
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|
309 |
|
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tuples->len += 1; |
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311 |
} |
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|
312 |
|
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|
313 |
EXPORT_C GTuples* |
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g_relation_select (GRelation *relation, |
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315 |
gconstpointer key, |
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316 |
gint field) |
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317 |
{ |
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318 |
GHashTable *table; |
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319 |
GHashTable *key_table; |
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320 |
GRealTuples *tuples; |
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|
321 |
gint count; |
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322 |
|
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|
323 |
g_return_val_if_fail (relation != NULL, NULL); |
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|
324 |
|
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|
325 |
table = relation->hashed_tuple_tables[field]; |
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|
326 |
|
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|
327 |
g_return_val_if_fail (table != NULL, NULL); |
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|
328 |
|
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329 |
tuples = g_new0 (GRealTuples, 1); |
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|
330 |
key_table = g_hash_table_lookup (table, key); |
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|
331 |
|
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|
332 |
if (!key_table) |
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333 |
return (GTuples*)tuples; |
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|
334 |
|
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|
335 |
count = g_relation_count (relation, key, field); |
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|
336 |
|
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|
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tuples->data = g_malloc (sizeof (gpointer) * relation->fields * count); |
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|
338 |
tuples->width = relation->fields; |
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|
339 |
|
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|
340 |
g_hash_table_foreach (key_table, g_relation_select_tuple, tuples); |
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|
341 |
|
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|
342 |
g_assert (count == tuples->len); |
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|
343 |
|
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return (GTuples*)tuples; |
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345 |
} |
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|
346 |
|
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|
347 |
EXPORT_C gint |
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348 |
g_relation_count (GRelation *relation, |
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349 |
gconstpointer key, |
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350 |
gint field) |
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|
351 |
{ |
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|
352 |
GHashTable *table; |
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|
353 |
GHashTable *key_table; |
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|
354 |
|
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|
355 |
g_return_val_if_fail (relation != NULL, 0); |
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|
356 |
|
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|
357 |
table = relation->hashed_tuple_tables[field]; |
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|
358 |
|
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|
359 |
g_return_val_if_fail (table != NULL, 0); |
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|
360 |
|
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|
361 |
key_table = g_hash_table_lookup (table, key); |
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|
362 |
|
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|
363 |
if (!key_table) |
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Revision: 201011
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|
364 |
return 0; |
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|
365 |
|
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Revision: 201011
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|
366 |
return g_hash_table_size (key_table); |
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|
367 |
} |
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|
368 |
|
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Revision: 201011
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|
369 |
EXPORT_C gboolean |
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|
370 |
g_relation_exists (GRelation *relation, ...) |
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Revision: 201011
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|
371 |
{ |
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Revision: 201011
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|
372 |
gpointer *tuple = g_slice_alloc (relation->fields * sizeof (gpointer)); |
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|
373 |
va_list args; |
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Revision: 201011
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|
374 |
gint i; |
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Revision: 201011
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|
375 |
gboolean result; |
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|
376 |
|
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|
377 |
va_start(args, relation); |
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|
378 |
|
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Revision: 201011
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|
379 |
for (i = 0; i < relation->fields; i += 1) |
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|
380 |
tuple[i] = va_arg(args, gpointer); |
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|
381 |
|
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Revision: 201011
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|
382 |
va_end(args); |
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|
383 |
|
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Revision: 201011
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|
384 |
result = g_hash_table_lookup (relation->all_tuples, tuple) != NULL; |
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|
385 |
|
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Revision: 201011
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|
386 |
g_slice_free1 (relation->fields * sizeof (gpointer), tuple); |
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Revision: 201011
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parents:
diff
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|
387 |
|
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Revision: 201011
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|
388 |
return result; |
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Revision: 201011
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|
389 |
} |
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Revision: 201011
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parents:
diff
changeset
|
390 |
|
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Revision: 201011
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|
391 |
EXPORT_C void |
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Revision: 201011
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|
392 |
g_tuples_destroy (GTuples *tuples0) |
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Revision: 201011
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|
393 |
{ |
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Revision: 201011
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|
394 |
GRealTuples *tuples = (GRealTuples*) tuples0; |
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Revision: 201011
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|
395 |
|
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Revision: 201011
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|
396 |
if (tuples) |
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Revision: 201011
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|
397 |
{ |
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Revision: 201011
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|
398 |
g_free (tuples->data); |
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Revision: 201011
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|
399 |
g_free (tuples); |
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Revision: 201011
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|
400 |
} |
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Revision: 201011
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parents:
diff
changeset
|
401 |
} |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
402 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
403 |
EXPORT_C gpointer |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
404 |
g_tuples_index (GTuples *tuples0, |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
405 |
gint index, |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
406 |
gint field) |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
407 |
{ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
408 |
GRealTuples *tuples = (GRealTuples*) tuples0; |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
409 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
410 |
g_return_val_if_fail (tuples0 != NULL, NULL); |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
411 |
g_return_val_if_fail (field < tuples->width, NULL); |
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Revision: 201011
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parents:
diff
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|
412 |
|
47c74d1534e1
Revision: 201011
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parents:
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|
413 |
return tuples->data[index * tuples->width + field]; |
47c74d1534e1
Revision: 201011
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parents:
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|
414 |
} |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
415 |
|
47c74d1534e1
Revision: 201011
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parents:
diff
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|
416 |
|
47c74d1534e1
Revision: 201011
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parents:
diff
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|
417 |
*/ |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
418 |
|
47c74d1534e1
Revision: 201011
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parents:
diff
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|
419 |
static void |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
420 |
g_relation_print_one (gpointer tuple_key, |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
421 |
gpointer tuple_value, |
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422 |
gpointer user_data) |
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423 |
{ |
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424 |
gint i; |
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425 |
GString *gstring; |
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426 |
GRelation* rel = (GRelation*) user_data; |
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427 |
gpointer* tuples = (gpointer*) tuple_value; |
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|
428 |
|
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429 |
gstring = g_string_new ("["); |
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|
430 |
|
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431 |
for (i = 0; i < rel->fields; i += 1) |
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432 |
{ |
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Revision: 201011
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433 |
g_string_append_printf (gstring, "%p", tuples[i]); |
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Revision: 201011
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|
434 |
|
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435 |
if (i < (rel->fields - 1)) |
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436 |
g_string_append (gstring, ","); |
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Revision: 201011
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parents:
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437 |
} |
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Revision: 201011
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|
438 |
|
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439 |
g_string_append (gstring, "]"); |
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Revision: 201011
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parents:
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440 |
g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, "%s", gstring->str); |
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441 |
g_string_free (gstring, TRUE); |
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Revision: 201011
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|
442 |
} |
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|
443 |
|
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Revision: 201011
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444 |
static void |
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445 |
g_relation_print_index (gpointer tuple_key, |
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Revision: 201011
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446 |
gpointer tuple_value, |
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Revision: 201011
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447 |
gpointer user_data) |
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Revision: 201011
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parents:
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|
448 |
{ |
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449 |
GRelation* rel = (GRelation*) user_data; |
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450 |
GHashTable* table = (GHashTable*) tuple_value; |
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Revision: 201011
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|
451 |
|
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|
452 |
g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, "*** key %p", tuple_key); |
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|
453 |
|
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Revision: 201011
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|
454 |
g_hash_table_foreach (table, |
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Revision: 201011
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455 |
g_relation_print_one, |
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Revision: 201011
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|
456 |
rel); |
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Revision: 201011
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|
457 |
} |
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Revision: 201011
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|
458 |
|
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Revision: 201011
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|
459 |
EXPORT_C void |
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Revision: 201011
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460 |
g_relation_print (GRelation *relation) |
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Revision: 201011
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|
461 |
{ |
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Revision: 201011
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|
462 |
gint i; |
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parents:
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|
463 |
|
47c74d1534e1
Revision: 201011
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|
464 |
g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, "*** all tuples (%d)", relation->count); |
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|
465 |
|
47c74d1534e1
Revision: 201011
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|
466 |
g_hash_table_foreach (relation->all_tuples, |
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Revision: 201011
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parents:
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|
467 |
g_relation_print_one, |
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Revision: 201011
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|
468 |
relation); |
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Revision: 201011
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|
469 |
|
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Revision: 201011
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|
470 |
for (i = 0; i < relation->fields; i += 1) |
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Revision: 201011
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parents:
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|
471 |
{ |
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Revision: 201011
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|
472 |
if (relation->hashed_tuple_tables[i] == NULL) |
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Revision: 201011
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|
473 |
continue; |
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Revision: 201011
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|
474 |
|
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Revision: 201011
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|
475 |
g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, "*** index %d", i); |
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Revision: 201011
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parents:
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|
476 |
|
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Revision: 201011
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|
477 |
g_hash_table_foreach (relation->hashed_tuple_tables[i], |
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Revision: 201011
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parents:
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|
478 |
g_relation_print_index, |
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Revision: 201011
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|
479 |
relation); |
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Revision: 201011
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|
480 |
} |
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Revision: 201011
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parents:
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|
481 |
|
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Revision: 201011
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parents:
diff
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|
482 |
} |
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Revision: 201011
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parents:
diff
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|
483 |
|
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Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
484 |
#define __G_REL_C__ |
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Revision: 201011
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|
485 |
#include "galiasdef.c" |