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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)
* Copyright (C) 2003 Apple Computer, Inc.
*
* 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
*
*/
#include "lookup.h"
#include <config-kjs.h>
#include <stdio.h>
#include <string.h>
#include <wtf/Assertions.h>
using namespace KJS;
static inline bool keysMatch(const UChar *c, unsigned len, const char *s)
{
const char* end = s + len;
for (; s != end; c++, s++)
if (c->uc != (unsigned char)*s)
return false;
return *s == 0;
}
static inline const HashEntry* findEntry(const struct HashTable *table, unsigned int hash,
const UChar *c, unsigned int len )
{
#ifndef NDEBUG
if (table->type != 2) {
fprintf(stderr, "KJS: Unknown hash table version.\n");
return 0;
}
#endif
ASSERT(table->hashSize != 0);
hash %= table->hashSize;
const HashEntry *e = &table->entries[hash];
// empty bucket ?
if (!e->s)
return 0;
do {
// compare strings
if (keysMatch(c, len, e->s))
return e;
// try next bucket
e = e->next;
} while (e);
return 0;
}
const HashEntry* Lookup::findEntry(const struct HashTable *table,
const Identifier &s )
{
const HashEntry* entry = ::findEntry(table, s.ustring().rep()->hash(), s.data(), s.size());
return entry;
}
int Lookup::find(const struct HashTable *table,
const UChar *c, unsigned int len)
{
const HashEntry *entry = ::findEntry(table, UString::Rep::computeHash(c, len), c, len);
if (entry)
return entry->value;
return -1;
}
int Lookup::find(const struct HashTable *table, const Identifier &s)
{
//printf("looking for:%s\n", s.ascii());
const HashEntry *entry = ::findEntry(table, s.ustring().rep()->hash(), s.data(), s.size());
if (entry)
return entry->value;
return -1;
}
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