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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
import { BigNumber } from '@0xproject/utils';
import * as chai from 'chai';
import { TestLibMemContract } from '../../src/contract_wrappers/generated/test_lib_mem';
import { artifacts } from '../../src/utils/artifacts';
import { chaiSetup } from '../../src/utils/chai_setup';
import { provider, txDefaults, web3Wrapper } from '../../src/utils/web3_wrapper';
chaiSetup.configure();
const expect = chai.expect;
// BUG: Ideally we would use Buffer.from(memory).toString('hex')
// https://github.com/Microsoft/TypeScript/issues/23155
const toHex = (buf: Uint8Array): string => buf.reduce((a, v) => a + ('00' + v.toString(16)).slice(-2), '0x');
const fromHex = (str: string): Uint8Array => Uint8Array.from(Buffer.from(str.slice(2), 'hex'));
describe('LibMem', () => {
let owner: string;
let testLibMem: TestLibMemContract;
before(async () => {
// Setup accounts & addresses
const accounts = await web3Wrapper.getAvailableAddressesAsync();
owner = accounts[0];
// Deploy TestLibMem
testLibMem = await TestLibMemContract.deployFrom0xArtifactAsync(artifacts.TestLibMem, provider, txDefaults);
});
describe('memcpy', () => {
// Create memory 0x000102...FF
const memSize = 256;
const memory = new Uint8Array(memSize).map((_, i) => i);
const memHex = toHex(memory);
// Reference implementation to test against
const refMemcpy = (mem: Uint8Array, dest: number, source: number, length: number): Uint8Array =>
Uint8Array.from(memory).copyWithin(dest, source, source + length);
// Test vectors: destination, source, length, job description
type Tests = Array<[number, number, number, string]>;
const test = (tests: Tests) =>
tests.forEach(([dest, source, length, job]) =>
it(job, async () => {
const expected = refMemcpy(memory, dest, source, length);
const resultStr = await testLibMem.testMemcpy.callAsync(
memHex,
new BigNumber(dest),
new BigNumber(source),
new BigNumber(length),
);
const result = fromHex(resultStr);
expect(result).to.deep.equal(expected);
}),
);
test([[0, 0, 0, 'copies zero bytes with overlap']]);
describe('copies forward', () =>
test([
[128, 0, 0, 'zero bytes'],
[128, 0, 1, 'one byte'],
[128, 0, 11, 'eleven bytes'],
[128, 0, 31, 'thirty-one bytes'],
[128, 0, 32, 'one word'],
[128, 0, 64, 'two words'],
[128, 0, 96, 'three words'],
[128, 0, 33, 'one word and one byte'],
[128, 0, 72, 'two words and eight bytes'],
[128, 0, 100, 'three words and four bytes'],
]));
describe('copies forward within one word', () =>
test([
[16, 0, 0, 'zero bytes'],
[16, 0, 1, 'one byte'],
[16, 0, 11, 'eleven bytes'],
[16, 0, 16, 'sixteen bytes'],
]));
describe('copies forward with one byte overlap', () =>
test([
[0, 0, 1, 'one byte'],
[10, 0, 11, 'eleven bytes'],
[30, 0, 31, 'thirty-one bytes'],
[31, 0, 32, 'one word'],
[32, 0, 33, 'one word and one byte'],
[71, 0, 72, 'two words and eight bytes'],
[99, 0, 100, 'three words and four bytes'],
]));
describe('copies forward with thirty-one bytes overlap', () =>
test([
[0, 0, 31, 'thirty-one bytes'],
[1, 0, 32, 'one word'],
[2, 0, 33, 'one word and one byte'],
[41, 0, 72, 'two words and eight bytes'],
[69, 0, 100, 'three words and four bytes'],
]));
describe('copies forward with one word overlap', () =>
test([
[0, 0, 32, 'one word'],
[1, 0, 33, 'one word and one byte'],
[41, 0, 72, 'two words and eight bytes'],
[69, 0, 100, 'three words and four bytes'],
]));
describe('copies forward with one word and one byte overlap', () =>
test([
[0, 0, 33, 'one word and one byte'],
[40, 0, 72, 'two words and eight bytes'],
[68, 0, 100, 'three words and four bytes'],
]));
describe('copies forward with two words overlap', () =>
test([
[0, 0, 64, 'two words'],
[8, 0, 72, 'two words and eight bytes'],
[36, 0, 100, 'three words and four bytes'],
]));
describe('copies forward within one word and one byte overlap', () =>
test([[0, 0, 1, 'one byte'], [10, 0, 11, 'eleven bytes'], [15, 0, 16, 'sixteen bytes']]));
describe('copies backward', () =>
test([
[0, 128, 0, 'zero bytes'],
[0, 128, 1, 'one byte'],
[0, 128, 11, 'eleven bytes'],
[0, 128, 31, 'thirty-one bytes'],
[0, 128, 32, 'one word'],
[0, 128, 64, 'two words'],
[0, 128, 96, 'three words'],
[0, 128, 33, 'one word and one byte'],
[0, 128, 72, 'two words and eight bytes'],
[0, 128, 100, 'three words and four bytes'],
]));
describe('copies backward within one word', () =>
test([
[0, 16, 0, 'zero bytes'],
[0, 16, 1, 'one byte'],
[0, 16, 11, 'eleven bytes'],
[0, 16, 16, 'sixteen bytes'],
]));
describe('copies backward with one byte overlap', () =>
test([
[0, 0, 1, 'one byte'],
[0, 10, 11, 'eleven bytes'],
[0, 30, 31, 'thirty-one bytes'],
[0, 31, 32, 'one word'],
[0, 32, 33, 'one word and one byte'],
[0, 71, 72, 'two words and eight bytes'],
[0, 99, 100, 'three words and four bytes'],
]));
describe('copies backward with thirty-one bytes overlap', () =>
test([
[0, 0, 31, 'thirty-one bytes'],
[0, 1, 32, 'one word'],
[0, 2, 33, 'one word and one byte'],
[0, 41, 72, 'two words and eight bytes'],
[0, 69, 100, 'three words and four bytes'],
]));
describe('copies backward with one word overlap', () =>
test([
[0, 0, 32, 'one word'],
[0, 1, 33, 'one word and one byte'],
[0, 41, 72, 'two words and eight bytes'],
[0, 69, 100, 'three words and four bytes'],
]));
describe('copies backward with one word and one byte overlap', () =>
test([
[0, 0, 33, 'one word and one byte'],
[0, 40, 72, 'two words and eight bytes'],
[0, 68, 100, 'three words and four bytes'],
]));
describe('copies backward with two words overlap', () =>
test([
[0, 0, 64, 'two words'],
[0, 8, 72, 'two words and eight bytes'],
[0, 36, 100, 'three words and four bytes'],
]));
describe('copies forward within one word and one byte overlap', () =>
test([[0, 0, 1, 'one byte'], [0, 10, 11, 'eleven bytes'], [0, 15, 16, 'sixteen bytes']]));
});
});
|
