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114 lines
2.6 KiB
114 lines
2.6 KiB
// -*- c-basic-offset: 2 -*-
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/*
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* This file is part of the KDE libraries
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* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
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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 Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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// adapted to tdevelop by Roberto Raggi <roberto@kdevelop.org>
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#include "lookup.h"
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#include <kdebug.h>
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#include <stdio.h>
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#include <string.h>
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const HashEntry* Lookup::findEntry( const struct HashTable *table,
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const TQChar *c, unsigned int len )
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{
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if (table->type != 2) {
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kdDebug() << "KJS: Unknown hash table version" << endl;
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return 0;
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}
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char *ascii = new char[len+1];
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unsigned int i;
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for(i = 0; i < len; i++, c++) {
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if (!c->row())
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ascii[i] = c->cell();
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else
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break;
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}
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ascii[i] = '\0';
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int h = hash(ascii) % table->hashSize;
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const HashEntry *e = &table->entries[h];
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// empty bucket ?
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if (!e->s) {
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delete [] ascii;
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return 0;
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}
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do {
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// compare strings
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if (strcmp(ascii, e->s) == 0) {
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delete [] ascii;
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return e;
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}
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// try next bucket
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e = e->next;
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} while (e);
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delete [] ascii;
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return 0;
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}
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const HashEntry* Lookup::findEntry( const struct HashTable *table,
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const TQString &s )
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{
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return findEntry( table, s.unicode(), s.length() );
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}
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int Lookup::find(const struct HashTable *table,
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const TQChar *c, unsigned int len)
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{
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const HashEntry *entry = findEntry( table, c, len );
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if (entry)
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return entry->value;
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return -1;
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}
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int Lookup::find(const struct HashTable *table, const TQString &s)
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{
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return find(table, s.unicode(), s.length());
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}
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unsigned int Lookup::hash(const TQChar *c, unsigned int len)
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{
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unsigned int val = 0;
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// ignoring rower byte
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for (unsigned int i = 0; i < len; i++, c++)
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val += c->cell();
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return val;
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}
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unsigned int Lookup::hash(const TQString &key)
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{
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return hash(key.unicode(), key.length());
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}
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unsigned int Lookup::hash(const char *s)
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{
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unsigned int val = 0;
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while (*s)
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val += *s++;
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return val;
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}
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