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// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stdlib.h>
#include "v8.h"
#include "hashmap.h"
#include "cctest.h"
using namespace v8::internal;
static bool DefaultMatchFun(void* a, void* b) {
return a == b;
}
class IntSet {
public:
IntSet() : map_(DefaultMatchFun) {}
void Insert(int x) {
CHECK_NE(0, x); // 0 corresponds to (void*)NULL - illegal key value
HashMap::Entry* p = map_.Lookup(reinterpret_cast<void*>(x), Hash(x), true);
CHECK(p != NULL); // insert is set!
CHECK_EQ(reinterpret_cast<void*>(x), p->key);
// we don't care about p->value
}
bool Present(int x) {
HashMap::Entry* p = map_.Lookup(reinterpret_cast<void*>(x), Hash(x), false);
if (p != NULL) {
CHECK_EQ(reinterpret_cast<void*>(x), p->key);
}
return p != NULL;
}
void Clear() {
map_.Clear();
}
uint32_t occupancy() const {
uint32_t count = 0;
for (HashMap::Entry* p = map_.Start(); p != NULL; p = map_.Next(p)) {
count++;
}
CHECK_EQ(map_.occupancy(), static_cast<double>(count));
return count;
}
private:
HashMap map_;
static uint32_t Hash(uint32_t key) { return key * 23; }
};
TEST(Set) {
IntSet set;
CHECK_EQ(0, set.occupancy());
set.Insert(1);
set.Insert(2);
set.Insert(3);
CHECK_EQ(3, set.occupancy());
set.Insert(2);
set.Insert(3);
CHECK_EQ(3, set.occupancy());
CHECK(set.Present(1));
CHECK(set.Present(2));
CHECK(set.Present(3));
CHECK(!set.Present(4));
CHECK_EQ(3, set.occupancy());
set.Clear();
CHECK_EQ(0, set.occupancy());
// Insert a long series of values.
const int start = 453;
const int factor = 13;
const int offset = 7;
const uint32_t n = 1000;
int x = start;
for (uint32_t i = 0; i < n; i++) {
CHECK_EQ(i, static_cast<double>(set.occupancy()));
set.Insert(x);
x = x*factor + offset;
}
// Verify the same sequence of values.
x = start;
for (uint32_t i = 0; i < n; i++) {
CHECK(set.Present(x));
x = x*factor + offset;
}
CHECK_EQ(n, static_cast<double>(set.occupancy()));
}
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