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// -*- c-basic-offset: 2 -*-
/*
* This file is part of the KDE libraries
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
// adapted to kdevelop by Roberto Raggi <roberto@kdevelop.org>
#include "lookup.h"
#include <kdebug.h>
#include <stdio.h>
#include <string.h>
const HashEntry* Lookup::findEntry( const struct HashTable *table,
const QChar *c, unsigned int len )
{
if (table->type != 2) {
kdDebug() << "KJS: Unknown hash table version" << endl;
return 0;
}
char *ascii = new char[len+1];
unsigned int i;
for(i = 0; i < len; i++, c++) {
if (!c->row())
ascii[i] = c->cell();
else
break;
}
ascii[i] = '\0';
int h = hash(ascii) % table->hashSize;
const HashEntry *e = &table->entries[h];
// empty bucket ?
if (!e->s) {
delete [] ascii;
return 0;
}
do {
// compare strings
if (strcmp(ascii, e->s) == 0) {
delete [] ascii;
return e;
}
// try next bucket
e = e->next;
} while (e);
delete [] ascii;
return 0;
}
const HashEntry* Lookup::findEntry( const struct HashTable *table,
const QString &s )
{
return findEntry( table, s.unicode(), s.length() );
}
int Lookup::find(const struct HashTable *table,
const QChar *c, unsigned int len)
{
const HashEntry *entry = findEntry( table, c, len );
if (entry)
return entry->value;
return -1;
}
int Lookup::find(const struct HashTable *table, const QString &s)
{
return find(table, s.unicode(), s.length());
}
unsigned int Lookup::hash(const QChar *c, unsigned int len)
{
unsigned int val = 0;
// ignoring rower byte
for (unsigned int i = 0; i < len; i++, c++)
val += c->cell();
return val;
}
unsigned int Lookup::hash(const QString &key)
{
return hash(key.unicode(), key.length());
}
unsigned int Lookup::hash(const char *s)
{
unsigned int val = 0;
while (*s)
val += *s++;
return val;
}
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