tests/hash-test.c - third_party/glib - Git at Google

 /* GLIB - Library of useful routines for C programming
  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
  * Copyright (C) 1999 The Free Software Foundation
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library 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
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library 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 1997-1999.  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/.
  */

 #undef G_LOG_DOMAIN

 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif

 #if STDC_HEADERS
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #endif

 #include <glib.h>


 int array[10000];


 static gboolean
 my_hash_callback_remove (gpointer key,
 			 gpointer value,
 			 gpointer user_data)
 {
   int *d = value;

   if ((*d) % 2)
     return TRUE;

   return FALSE;
 }

 static void
 my_hash_callback_remove_test (gpointer key,
 			      gpointer value,
 			      gpointer user_data)
 {
   int *d = value;

   if ((*d) % 2)
     g_assert_not_reached ();
 }

 static void
 my_hash_callback (gpointer key,
 		  gpointer value,
 		  gpointer user_data)
 {
   int *d = value;
   *d = 1;
 }

 static guint
 my_hash (gconstpointer key)
 {
   return (guint) *((const gint*) key);
 }

 static gint
 my_hash_compare (gconstpointer a,
 		 gconstpointer b)
 {
   return *((const gint*) a) == *((const gint*) b);
 }


 /*
  * This is a simplified version of the pathalias hashing function.
  * Thanks to Steve Belovin and Peter Honeyman
  *
  * hash a string into a long int.  31 bit crc (from andrew appel).
  * the crc table is computed at run time by crcinit() -- we could
  * precompute, but it takes 1 clock tick on a 750.
  *
  * This fast table calculation works only if POLY is a prime polynomial
  * in the field of integers modulo 2.  Since the coefficients of a
  * 32-bit polynomial won't fit in a 32-bit word, the high-order bit is
  * implicit.  IT MUST ALSO BE THE CASE that the coefficients of orders
  * 31 down to 25 are zero.  Happily, we have candidates, from
  * E. J.  Watson, "Primitive Polynomials (Mod 2)", Math. Comp. 16 (1962):
  *	x^32 + x^7 + x^5 + x^3 + x^2 + x^1 + x^0
  *	x^31 + x^3 + x^0
  *
  * We reverse the bits to get:
  *	111101010000000000000000000000001 but drop the last 1
  *         f   5   0   0   0   0   0   0
  *	010010000000000000000000000000001 ditto, for 31-bit crc
  *	   4   8   0   0   0   0   0   0
  */

 #define POLY 0x48000000L	/* 31-bit polynomial (avoids sign problems) */

 static guint CrcTable[128];

 /*
  - crcinit - initialize tables for hash function
  */
 static void crcinit(void)
 {
 	int i, j;
 	guint sum;

 	for (i = 0; i < 128; ++i) {
 		sum = 0L;
 		for (j = 7 - 1; j >= 0; --j)
 			if (i & (1 << j))
 				sum ^= POLY >> j;
 		CrcTable[i] = sum;
 	}
 }

 /*
  - hash - Honeyman's nice hashing function
  */
 static guint honeyman_hash(gconstpointer key)
 {
 	const gchar *name = (const gchar *) key;
 	gint size;
 	guint sum = 0;

 	g_assert (name != NULL);
 	g_assert (*name != 0);

 	size = strlen(name);

 	while (size--) {
 		sum = (sum >> 7) ^ CrcTable[(sum ^ (*name++)) & 0x7f];
 	}

 	return(sum);
 }


 static gint second_hash_cmp (gconstpointer a, gconstpointer b)
 {
   gint rc = (strcmp (a, b) == 0);

   return rc;
 }


 static guint one_hash(gconstpointer key)
 {
   return 1;
 }


 static void not_even_foreach (gpointer       key,
 				 gpointer       value,
 				 gpointer	user_data)
 {
   const char *_key = (const char *) key;
   const char *_value = (const char *) value;
   int i;
   char val [20];

   g_assert (_key != NULL);
   g_assert (*_key != 0);
   g_assert (_value != NULL);
   g_assert (*_value != 0);

   i = atoi (_key);
   g_assert (atoi (_key) > 0);

   sprintf (val, "%d value", i);
   g_assert (strcmp (_value, val) == 0);

   g_assert ((i % 2) != 0);
   g_assert (i != 3);
 }


 static gboolean remove_even_foreach (gpointer       key,
 				 gpointer       value,
 				 gpointer	user_data)
 {
   const char *_key = (const char *) key;
   const char *_value = (const char *) value;
   int i;
   char val [20];

   g_assert (_key != NULL);
   g_assert (*_key != 0);
   g_assert (_value != NULL);
   g_assert (*_value != 0);

   i = atoi (_key);
   g_assert (i > 0);

   sprintf (val, "%d value", i);
   g_assert (strcmp (_value, val) == 0);

   return ((i % 2) == 0) ? TRUE : FALSE;
 }


 static void second_hash_test (gboolean simple_hash)
 {
      int       i;
      char      key[20] = "", val[20]="", *v, *orig_key, *orig_val;
      GHashTable     *h;
      gboolean found;

      crcinit ();

      h = g_hash_table_new (simple_hash ? one_hash : honeyman_hash,
      			   second_hash_cmp);
      g_assert (h != NULL);
      for (i=0; i<20; i++)
           {
           sprintf (key, "%d", i);
 	  g_assert (atoi (key) == i);

 	  sprintf (val, "%d value", i);
 	  g_assert (atoi (val) == i);

           g_hash_table_insert (h, g_strdup (key), g_strdup (val));
           }

      g_assert (g_hash_table_size (h) == 20);

      for (i=0; i<20; i++)
           {
           sprintf (key, "%d", i);
 	  g_assert (atoi(key) == i);

           v = (char *) g_hash_table_lookup (h, key);

 	  g_assert (v != NULL);
 	  g_assert (*v != 0);
 	  g_assert (atoi (v) == i);
           }

      /**** future test stuff, yet to be debugged
      sprintf (key, "%d", 3);
      g_hash_table_remove (h, key);
      g_hash_table_foreach_remove (h, remove_even_foreach, NULL);
      g_hash_table_foreach (h, not_even_foreach, NULL);
      */

      for (i=0; i<20; i++)
           {
 	  if (((i % 2) == 0) || (i == 3))
 	    i++;

           sprintf (key, "%d", i);
 	  g_assert (atoi(key) == i);

 	  sprintf (val, "%d value", i);
 	  g_assert (atoi (val) == i);

 	  orig_key = orig_val = NULL;
           found = g_hash_table_lookup_extended (h, key,
 	  					(gpointer)&orig_key,
 						(gpointer)&orig_val);
 	  g_assert (found);

 	  g_assert (orig_key != NULL);
 	  g_assert (strcmp (key, orig_key) == 0);
 	  g_free (orig_key);

 	  g_assert (orig_val != NULL);
 	  g_assert (strcmp (val, orig_val) == 0);
 	  g_free (orig_val);
           }

     g_hash_table_destroy (h);
 }


 static void direct_hash_test (void)
 {
      gint       i, rc;
      GHashTable     *h;

      h = g_hash_table_new (NULL, NULL);
      g_assert (h != NULL);
      for (i=1; i<=20; i++)
           {
           g_hash_table_insert (h, GINT_TO_POINTER (i),
 	  		       GINT_TO_POINTER (i + 42));
           }

      g_assert (g_hash_table_size (h) == 20);

      for (i=1; i<=20; i++)
           {
           rc = GPOINTER_TO_INT (
 	  	g_hash_table_lookup (h, GINT_TO_POINTER (i)));

 	  g_assert (rc != 0);
 	  g_assert ((rc - 42) == i);
           }

     g_hash_table_destroy (h);
 }


 int
 main (int   argc,
       char *argv[])
 {
   GHashTable *hash_table;
   gint i;

   hash_table = g_hash_table_new (my_hash, my_hash_compare);
   for (i = 0; i < 10000; i++)
     {
       array[i] = i;
       g_hash_table_insert (hash_table, &array[i], &array[i]);
     }
   g_hash_table_foreach (hash_table, my_hash_callback, NULL);

   for (i = 0; i < 10000; i++)
     if (array[i] == 0)
       g_assert_not_reached();

   for (i = 0; i < 10000; i++)
     g_hash_table_remove (hash_table, &array[i]);

   for (i = 0; i < 10000; i++)
     {
       array[i] = i;
       g_hash_table_insert (hash_table, &array[i], &array[i]);
     }

   if (g_hash_table_foreach_remove (hash_table, my_hash_callback_remove, NULL) != 5000 ||
       g_hash_table_size (hash_table) != 5000)
     g_assert_not_reached();

   g_hash_table_foreach (hash_table, my_hash_callback_remove_test, NULL);


   g_hash_table_destroy (hash_table);

   second_hash_test (TRUE);
   second_hash_test (FALSE);
   direct_hash_test ();

   return 0;

 }
	/* GLIB - Library of useful routines for C programming
	* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
	* Copyright (C) 1999 The Free Software Foundation
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library 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
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library 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 1997-1999. 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/.
	*/

	#undef G_LOG_DOMAIN

	#ifdef HAVE_CONFIG_H
	# include <config.h>
	#endif

	#if STDC_HEADERS
	#include <stdio.h>
	#include <string.h>
	#include <stdlib.h>
	#endif

	#include <glib.h>



	int array[10000];



	static gboolean
	my_hash_callback_remove (gpointer key,
	gpointer value,
	gpointer user_data)
	{
	int *d = value;

	if ((*d) % 2)
	return TRUE;

	return FALSE;
	}

	static void
	my_hash_callback_remove_test (gpointer key,
	gpointer value,
	gpointer user_data)
	{
	int *d = value;

	if ((*d) % 2)
	g_assert_not_reached ();
	}

	static void
	my_hash_callback (gpointer key,
	gpointer value,
	gpointer user_data)
	{
	int *d = value;
	*d = 1;
	}

	static guint
	my_hash (gconstpointer key)
	{
	return (guint) ((const gint) key);
	}

	static gint
	my_hash_compare (gconstpointer a,
	gconstpointer b)
	{
	return ((const gint) a) == ((const gint) b);
	}



	/*
	* This is a simplified version of the pathalias hashing function.
	* Thanks to Steve Belovin and Peter Honeyman
	*
	* hash a string into a long int. 31 bit crc (from andrew appel).
	* the crc table is computed at run time by crcinit() -- we could
	* precompute, but it takes 1 clock tick on a 750.
	*
	* This fast table calculation works only if POLY is a prime polynomial
	* in the field of integers modulo 2. Since the coefficients of a
	* 32-bit polynomial won't fit in a 32-bit word, the high-order bit is
	* implicit. IT MUST ALSO BE THE CASE that the coefficients of orders
	* 31 down to 25 are zero. Happily, we have candidates, from
	* E. J. Watson, "Primitive Polynomials (Mod 2)", Math. Comp. 16 (1962):
	* x^32 + x^7 + x^5 + x^3 + x^2 + x^1 + x^0
	* x^31 + x^3 + x^0
	*
	* We reverse the bits to get:
	* 111101010000000000000000000000001 but drop the last 1
	* f 5 0 0 0 0 0 0
	* 010010000000000000000000000000001 ditto, for 31-bit crc
	* 4 8 0 0 0 0 0 0
	*/

	#define POLY 0x48000000L /* 31-bit polynomial (avoids sign problems) */

	static guint CrcTable[128];

	/*
	- crcinit - initialize tables for hash function
	*/
	static void crcinit(void)
	{
	int i, j;
	guint sum;

	for (i = 0; i < 128; ++i) {
	sum = 0L;
	for (j = 7 - 1; j >= 0; --j)
	if (i & (1 << j))
	sum ^= POLY >> j;
	CrcTable[i] = sum;
	}
	}

	/*
	- hash - Honeyman's nice hashing function
	*/
	static guint honeyman_hash(gconstpointer key)
	{
	const gchar name = (const gchar ) key;
	gint size;
	guint sum = 0;

	g_assert (name != NULL);
	g_assert (*name != 0);

	size = strlen(name);

	while (size--) {
	sum = (sum >> 7) ^ CrcTable[(sum ^ (*name++)) & 0x7f];
	}

	return(sum);
	}


	static gint second_hash_cmp (gconstpointer a, gconstpointer b)
	{
	gint rc = (strcmp (a, b) == 0);

	return rc;
	}



	static guint one_hash(gconstpointer key)
	{
	return 1;
	}


	static void not_even_foreach (gpointer key,
	gpointer value,
	gpointer user_data)
	{
	const char _key = (const char ) key;
	const char _value = (const char ) value;
	int i;
	char val [20];

	g_assert (_key != NULL);
	g_assert (*_key != 0);
	g_assert (_value != NULL);
	g_assert (*_value != 0);

	i = atoi (_key);
	g_assert (atoi (_key) > 0);

	sprintf (val, "%d value", i);
	g_assert (strcmp (_value, val) == 0);

	g_assert ((i % 2) != 0);
	g_assert (i != 3);
	}


	static gboolean remove_even_foreach (gpointer key,
	gpointer value,
	gpointer user_data)
	{
	const char _key = (const char ) key;
	const char _value = (const char ) value;
	int i;
	char val [20];

	g_assert (_key != NULL);
	g_assert (*_key != 0);
	g_assert (_value != NULL);
	g_assert (*_value != 0);

	i = atoi (_key);
	g_assert (i > 0);

	sprintf (val, "%d value", i);
	g_assert (strcmp (_value, val) == 0);

	return ((i % 2) == 0) ? TRUE : FALSE;
	}




	static void second_hash_test (gboolean simple_hash)
	{
	int i;
	char key[20] = "", val[20]="", v, orig_key, *orig_val;
	GHashTable *h;
	gboolean found;

	crcinit ();

	h = g_hash_table_new (simple_hash ? one_hash : honeyman_hash,
	second_hash_cmp);
	g_assert (h != NULL);
	for (i=0; i<20; i++)
	{
	sprintf (key, "%d", i);
	g_assert (atoi (key) == i);

	sprintf (val, "%d value", i);
	g_assert (atoi (val) == i);

	g_hash_table_insert (h, g_strdup (key), g_strdup (val));
	}

	g_assert (g_hash_table_size (h) == 20);

	for (i=0; i<20; i++)
	{
	sprintf (key, "%d", i);
	g_assert (atoi(key) == i);

	v = (char *) g_hash_table_lookup (h, key);

	g_assert (v != NULL);
	g_assert (*v != 0);
	g_assert (atoi (v) == i);
	}

	/**** future test stuff, yet to be debugged
	sprintf (key, "%d", 3);
	g_hash_table_remove (h, key);
	g_hash_table_foreach_remove (h, remove_even_foreach, NULL);
	g_hash_table_foreach (h, not_even_foreach, NULL);
	*/

	for (i=0; i<20; i++)
	{
	if (((i % 2) == 0) \|\| (i == 3))
	i++;

	sprintf (key, "%d", i);
	g_assert (atoi(key) == i);

	sprintf (val, "%d value", i);
	g_assert (atoi (val) == i);

	orig_key = orig_val = NULL;
	found = g_hash_table_lookup_extended (h, key,
	(gpointer)&orig_key,
	(gpointer)&orig_val);
	g_assert (found);

	g_assert (orig_key != NULL);
	g_assert (strcmp (key, orig_key) == 0);
	g_free (orig_key);

	g_assert (orig_val != NULL);
	g_assert (strcmp (val, orig_val) == 0);
	g_free (orig_val);
	}

	g_hash_table_destroy (h);
	}


	static void direct_hash_test (void)
	{
	gint i, rc;
	GHashTable *h;

	h = g_hash_table_new (NULL, NULL);
	g_assert (h != NULL);
	for (i=1; i<=20; i++)
	{
	g_hash_table_insert (h, GINT_TO_POINTER (i),
	GINT_TO_POINTER (i + 42));
	}

	g_assert (g_hash_table_size (h) == 20);

	for (i=1; i<=20; i++)
	{
	rc = GPOINTER_TO_INT (
	g_hash_table_lookup (h, GINT_TO_POINTER (i)));

	g_assert (rc != 0);
	g_assert ((rc - 42) == i);
	}

	g_hash_table_destroy (h);
	}



	int
	main (int argc,
	char *argv[])
	{
	GHashTable *hash_table;
	gint i;

	hash_table = g_hash_table_new (my_hash, my_hash_compare);
	for (i = 0; i < 10000; i++)
	{
	array[i] = i;
	g_hash_table_insert (hash_table, &array[i], &array[i]);
	}
	g_hash_table_foreach (hash_table, my_hash_callback, NULL);

	for (i = 0; i < 10000; i++)
	if (array[i] == 0)
	g_assert_not_reached();

	for (i = 0; i < 10000; i++)
	g_hash_table_remove (hash_table, &array[i]);

	for (i = 0; i < 10000; i++)
	{
	array[i] = i;
	g_hash_table_insert (hash_table, &array[i], &array[i]);
	}

	if (g_hash_table_foreach_remove (hash_table, my_hash_callback_remove, NULL) != 5000 \|\|
	g_hash_table_size (hash_table) != 5000)
	g_assert_not_reached();

	g_hash_table_foreach (hash_table, my_hash_callback_remove_test, NULL);


	g_hash_table_destroy (hash_table);

	second_hash_test (TRUE);
	second_hash_test (FALSE);
	direct_hash_test ();

	return 0;

	}