173 lines
4 KiB
C
173 lines
4 KiB
C
|
/*
|
||
|
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
|
||
|
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
|
||
|
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
|
||
|
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
|
||
|
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
|
||
|
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
|
||
|
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
|
||
|
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
|
||
|
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
|
||
|
COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
|
||
|
*/
|
||
|
/*
|
||
|
* $Source: /cvsroot/dxx-rebirth/d1x-rebirth/main/hash.c,v $
|
||
|
* $Revision: 1.1.1.1 $
|
||
|
* $Author: zicodxx $
|
||
|
* $Date: 2006/03/17 19:43:14 $
|
||
|
*
|
||
|
* Functions to do hash table lookup.
|
||
|
*
|
||
|
* $Log: hash.c,v $
|
||
|
* Revision 1.1.1.1 2006/03/17 19:43:14 zicodxx
|
||
|
* initial import
|
||
|
*
|
||
|
* Revision 1.2 1999/06/14 23:44:12 donut
|
||
|
* Orulz' svgalib/ggi/noerror patches.
|
||
|
*
|
||
|
* Revision 1.1.1.1 1999/06/14 22:07:45 donut
|
||
|
* Import of d1x 1.37 source.
|
||
|
*
|
||
|
* Revision 2.0 1995/02/27 11:28:01 john
|
||
|
* New version 2.0, which has no anonymous unions, builds with
|
||
|
* Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
|
||
|
*
|
||
|
* Revision 1.5 1994/12/05 23:37:06 matt
|
||
|
* Took out calls to warning() function
|
||
|
*
|
||
|
* Revision 1.4 1994/05/09 20:02:33 john
|
||
|
* Fixed bug w/ upper/lower case.
|
||
|
*
|
||
|
* Revision 1.3 1994/05/06 15:31:51 john
|
||
|
* Don't add duplicate names to the hash table.
|
||
|
*
|
||
|
* Revision 1.2 1994/05/03 16:45:35 john
|
||
|
* Added hash table lookup to speed up loading.
|
||
|
*
|
||
|
* Revision 1.1 1994/05/03 10:36:41 john
|
||
|
* Initial revision
|
||
|
*
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
#ifdef RCS
|
||
|
#pragma off (unreferenced)
|
||
|
static char rcsid[] = "$Id: hash.c,v 1.1.1.1 2006/03/17 19:43:14 zicodxx Exp $";
|
||
|
#pragma on (unreferenced)
|
||
|
#endif
|
||
|
|
||
|
#include <stdlib.h>
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
|
||
|
#include "error.h"
|
||
|
#include "mono.h"
|
||
|
#include "hash.h"
|
||
|
#include "key.h"
|
||
|
//added 05/17/99 Matt Mueller
|
||
|
#include "u_mem.h"
|
||
|
//end addition -MM
|
||
|
//added 6/15/99 Owen Evans
|
||
|
#include "strutil.h"
|
||
|
//end end addition -OE
|
||
|
|
||
|
|
||
|
int hashtable_init( hashtable *ht, int size ) {
|
||
|
int i;
|
||
|
|
||
|
ht->size=0;
|
||
|
|
||
|
for (i=1; i<12; i++ ) {
|
||
|
if ( (1<<i) >= size ) {
|
||
|
ht->bitsize = i;
|
||
|
ht->size = 1<<i;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
size = ht->size;
|
||
|
ht->and_mask = ht->size - 1;
|
||
|
if (ht->size==0)
|
||
|
Error( "Hashtable has size of 0" );
|
||
|
|
||
|
ht->key = (char **)malloc( size * sizeof(char *) );
|
||
|
if (ht->key==NULL)
|
||
|
Error( "Not enough memory to create a hash table of size %d", size );
|
||
|
|
||
|
for (i=0; i<size; i++ )
|
||
|
ht->key[i] = NULL;
|
||
|
|
||
|
// Use calloc cause we want zero'd array.
|
||
|
ht->value = malloc( size*sizeof(int) );
|
||
|
if (ht->value==NULL) {
|
||
|
free(ht->key);
|
||
|
Error( "Not enough memory to create a hash table of size %d\n", size );
|
||
|
}
|
||
|
|
||
|
ht->nitems = 0;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
void hashtable_free( hashtable *ht ) {
|
||
|
if (ht->key != NULL )
|
||
|
free( ht->key );
|
||
|
if (ht->value != NULL )
|
||
|
free( ht->value );
|
||
|
ht->size = 0;
|
||
|
}
|
||
|
|
||
|
int hashtable_getkey( char *key ) {
|
||
|
int k = 0, i=0;
|
||
|
|
||
|
while( *key ) {
|
||
|
k^=((int)(*key++))<<i;
|
||
|
i++;
|
||
|
}
|
||
|
return k;
|
||
|
}
|
||
|
|
||
|
int hashtable_search( hashtable *ht, char *key ) {
|
||
|
int i,j,k;
|
||
|
|
||
|
strlwr( key );
|
||
|
|
||
|
k = hashtable_getkey( key );
|
||
|
i = 0;
|
||
|
|
||
|
while(i < ht->size ) {
|
||
|
j = (k+(i++)) & ht->and_mask;
|
||
|
if ( ht->key[j] == NULL )
|
||
|
return -1;
|
||
|
if (!strcasecmp(ht->key[j], key ))
|
||
|
return ht->value[j];
|
||
|
}
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
void hashtable_insert( hashtable *ht, char *key, int value ) {
|
||
|
int i,j,k;
|
||
|
|
||
|
// mprintf( 0, "Inserting '%s' into hash table\n", key );
|
||
|
// key_getch();
|
||
|
|
||
|
strlwr( key );
|
||
|
k = hashtable_getkey( key );
|
||
|
i = 0;
|
||
|
|
||
|
while(i < ht->size) {
|
||
|
j = (k+(i++)) & ht->and_mask;
|
||
|
// Assert( j < ht->size );
|
||
|
// mprintf( 0, "Word '%s' (%d) at level %d has value of %d\n", key, k, i-1, j );
|
||
|
// mprintf( 0, "ht->key[%d]=%.8x\n", j, ht->key[j] );
|
||
|
if ( ht->key[j] == NULL ) {
|
||
|
ht->nitems++;
|
||
|
ht->key[j] = key;
|
||
|
ht->value[j] = value;
|
||
|
return;
|
||
|
} else if (!strcasecmp( key, ht->key[j] )) {
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
Error( "Out of hash slots\n" );
|
||
|
}
|