blob: fac45dd251e14b9f4acd1ea663bca809bb2ee4da (
plain) (
blame)
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
195
196
197
198
199
200
201
202
203
|
{ depot, lib, ... }:
let
inherit (depot.nix.runTestsuite)
runTestsuite
it
assertEq
;
inherit (depot.users.sterni.nix)
int
string
fun
;
testBounds = it "checks minBound and maxBound" [
# this is gonna blow up in my face because
# integer overflow is undefined behavior in
# C++, so most likely anything could happen?
(assertEq "maxBound is the maxBound" true
(int.maxBound + 1 < int.maxBound))
(assertEq "minBound is the minBound" true
(int.minBound - 1 > int.minBound))
(assertEq "maxBound overflows to minBound"
(int.maxBound + 1)
int.minBound)
(assertEq "minBound overflows to maxBound"
(int.minBound - 1)
int.maxBound)
];
expectedBytes = [
"00" "01" "02" "03" "04" "05" "06" "07" "08" "09" "0A" "0B" "0C" "0D" "0E" "0F"
"10" "11" "12" "13" "14" "15" "16" "17" "18" "19" "1A" "1B" "1C" "1D" "1E" "1F"
"20" "21" "22" "23" "24" "25" "26" "27" "28" "29" "2A" "2B" "2C" "2D" "2E" "2F"
"30" "31" "32" "33" "34" "35" "36" "37" "38" "39" "3A" "3B" "3C" "3D" "3E" "3F"
"40" "41" "42" "43" "44" "45" "46" "47" "48" "49" "4A" "4B" "4C" "4D" "4E" "4F"
"50" "51" "52" "53" "54" "55" "56" "57" "58" "59" "5A" "5B" "5C" "5D" "5E" "5F"
"60" "61" "62" "63" "64" "65" "66" "67" "68" "69" "6A" "6B" "6C" "6D" "6E" "6F"
"70" "71" "72" "73" "74" "75" "76" "77" "78" "79" "7A" "7B" "7C" "7D" "7E" "7F"
"80" "81" "82" "83" "84" "85" "86" "87" "88" "89" "8A" "8B" "8C" "8D" "8E" "8F"
"90" "91" "92" "93" "94" "95" "96" "97" "98" "99" "9A" "9B" "9C" "9D" "9E" "9F"
"A0" "A1" "A2" "A3" "A4" "A5" "A6" "A7" "A8" "A9" "AA" "AB" "AC" "AD" "AE" "AF"
"B0" "B1" "B2" "B3" "B4" "B5" "B6" "B7" "B8" "B9" "BA" "BB" "BC" "BD" "BE" "BF"
"C0" "C1" "C2" "C3" "C4" "C5" "C6" "C7" "C8" "C9" "CA" "CB" "CC" "CD" "CE" "CF"
"D0" "D1" "D2" "D3" "D4" "D5" "D6" "D7" "D8" "D9" "DA" "DB" "DC" "DD" "DE" "DF"
"E0" "E1" "E2" "E3" "E4" "E5" "E6" "E7" "E8" "E9" "EA" "EB" "EC" "ED" "EE" "EF"
"F0" "F1" "F2" "F3" "F4" "F5" "F6" "F7" "F8" "F9" "FA" "FB" "FC" "FD" "FE" "FF"
];
hexByte = i: string.fit { width = 2; char = "0"; } (int.toHex i);
hexInts = [
{ left = 0; right = "0"; }
{ left = 1; right = "1"; }
{ left = 11; right = "B"; }
{ left = 123; right = "7B"; }
{ left = 9000; right = "2328"; }
{ left = 2323; right = "913"; }
{ left = 4096; right = "1000"; }
{ left = int.maxBound; right = "7FFFFFFFFFFFFFFF"; }
{ left = int.minBound; right = "-8000000000000000"; }
];
testHex = it "checks conversion to hex" (lib.flatten [
(lib.imap0 (i: hex: [
(assertEq "hexByte ${toString i} == ${hex}" (hexByte i) hex)
(assertEq "${toString i} == fromHex ${hex}" i (int.fromHex hex))
]) expectedBytes)
(builtins.map ({ left, right }: [
(assertEq "toHex ${toString left} == ${right}" (int.toHex left) right)
(assertEq "${toString left} == fromHex ${right}" left (int.fromHex right))
]) hexInts)
]);
testBasic = it "checks basic int operations" [
(assertEq "122 is even" (int.even 122 && !(int.odd 122)) true)
(assertEq "123 is odd" (int.odd 123 && !(int.even 123)) true)
(assertEq "abs -4959" (int.abs (-4959)) 4959)
];
expNumbers = [
{ left = -3; right = 0.125; }
{ left = -2; right = 0.25; }
{ left = -1; right = 0.5; }
{ left = 0; right = 1; }
{ left = 1; right = 2; }
{ left = 2; right = 4; }
{ left = 3; right = 8; }
{ left = 4; right = 16; }
{ left = 5; right = 32; }
{ left = 16; right = 65536; }
];
testExp = it "checks exponentiation"
(builtins.map ({ left, right }:
assertEq
"2 ^ ${toString left} == ${toString right}"
(int.exp 2 left) right) expNumbers);
shifts = [
{ a = 2; b = 5; c = 64; op = "<<"; }
{ a = -2; b = 5; c = -64; op = "<<"; }
{ a = 123; b = 4; c = 1968; op = "<<"; }
{ a = 1; b = 8; c = 256; op = "<<"; }
{ a = 256; b = 8; c = 1; op = ">>"; }
{ a = 374; b = 2; c = 93; op = ">>"; }
{ a = 2; b = 2; c = 0; op = ">>"; }
{ a = 99; b = 9; c = 0; op = ">>"; }
];
checkShift = { a, b, c, op }@args:
let
f = string.match op {
"<<" = int.bitShiftL;
">>" = int.bitShiftR;
};
in assertEq "${toString a} ${op} ${toString b} == ${toString c}" (f a b) c;
checkShiftRDivExp = n:
assertEq "${toString n} >> 5 == ${toString n} / 2 ^ 5"
(int.bitShiftR n 5) (int.div n (int.exp 2 5));
checkShiftLMulExp = n:
assertEq "${toString n} >> 6 == ${toString n} * 2 ^ 6"
(int.bitShiftL n 5) (int.mul n (int.exp 2 5));
testBit = it "checks bitwise operations" (lib.flatten [
(builtins.map checkShift shifts)
(builtins.map checkShiftRDivExp [
1
2
3
5
7
23
1623
238
34
348
2834
834
348
])
(builtins.map checkShiftLMulExp [
1
2
3
5
7
23
384
3
2
5991
85109
38
])
]);
divisions = [
{ a = 2; b = 1; c = 2; mod = 0;}
{ a = 2; b = 2; c = 1; mod = 0;}
{ a = 20; b = 10; c = 2; mod = 0;}
{ a = 12; b = 5; c = 2; mod = 2;}
{ a = 23; b = 4; c = 5; mod = 3;}
];
checkDiv = n: { a, b, c, mod }: [
(assertEq "${n}: div result" (int.div a b) c)
(assertEq "${n}: mod result" (int.mod a b) mod)
(assertEq "${n}: divMod law" ((int.div a b) * b + (int.mod a b)) a)
];
testDivMod = it "checks integer division and modulo"
(lib.flatten [
(builtins.map (checkDiv "+a / +b") divisions)
(builtins.map (fun.rl (checkDiv "-a / +b") (x: x // {
a = -x.a;
c = -x.c;
mod = -x.mod;
})) divisions)
(builtins.map (fun.rl (checkDiv "+a / -b") (x: x // {
b = -x.b;
c = -x.c;
})) divisions)
(builtins.map (fun.rl (checkDiv "-a / -b") (x: x // {
a = -x.a;
b = -x.b;
mod = -x.mod;
})) divisions)
]);
in
runTestsuite "nix.int" [
testBounds
testHex
testBasic
testExp
testBit
testDivMod
]
|
