1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
// 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;
}
typedef uint32_t (*IntKeyHash)(uint32_t key);
class IntSet {
public:
explicit IntSet(IntKeyHash hash) : hash_(hash), 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
}
void Remove(int x) {
CHECK_NE(0, x); // 0 corresponds to (void*)NULL - illegal key value
map_.Remove(reinterpret_cast<void*>(x), hash_(x));
}
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:
IntKeyHash hash_;
HashMap map_;
};
static uint32_t Hash(uint32_t key) { return 23; }
static uint32_t CollisionHash(uint32_t key) { return key & 0x3; }
void TestSet(IntKeyHash hash, int size) {
IntSet set(hash);
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.Remove(1);
CHECK(!set.Present(1));
CHECK(set.Present(2));
CHECK(set.Present(3));
CHECK_EQ(2, set.occupancy());
set.Remove(3);
CHECK(!set.Present(1));
CHECK(set.Present(2));
CHECK(!set.Present(3));
CHECK_EQ(1, 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 = size;
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;
}
CHECK_EQ(n, static_cast<double>(set.occupancy()));
// 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()));
// Remove all these values.
x = start;
for (uint32_t i = 0; i < n; i++) {
CHECK_EQ(n - i, static_cast<double>(set.occupancy()));
CHECK(set.Present(x));
set.Remove(x);
CHECK(!set.Present(x));
x = x * factor + offset;
// Verify the the expected values are still there.
int y = start;
for (uint32_t j = 0; j < n; j++) {
if (j <= i) {
CHECK(!set.Present(y));
} else {
CHECK(set.Present(y));
}
y = y * factor + offset;
}
}
CHECK_EQ(0, set.occupancy());
}
TEST(Set) {
TestSet(Hash, 100);
TestSet(CollisionHash, 50);
}
|
