Source file
src/tawesoft.co.uk/go/operator/uint64.go
Documentation:
src/tawesoft.co.uk/go/operator/uint64.go
1 package operator
2
3
4
5
6
7
8 type uint64Unary struct {
9 Identity func(uint64) uint64
10 Not func(uint64) uint64
11 Zero func(uint64) bool
12 NonZero func(uint64) bool
13 Positive func(uint64) bool
14 Negative func(uint64) bool
15 }
16
17 type uint64UnaryChecked struct {
18 }
19
20 type uint64Binary struct {
21 Add func(uint64, uint64) uint64
22 Sub func(uint64, uint64) uint64
23 Mul func(uint64, uint64) uint64
24 Div func(uint64, uint64) uint64
25 Mod func(uint64, uint64) uint64
26
27 Eq func(uint64, uint64) bool
28 Neq func(uint64, uint64) bool
29 Lt func(uint64, uint64) bool
30 Lte func(uint64, uint64) bool
31 Gt func(uint64, uint64) bool
32 Gte func(uint64, uint64) bool
33
34 And func(uint64, uint64) uint64
35 Or func(uint64, uint64) uint64
36 Xor func(uint64, uint64) uint64
37 AndNot func(uint64, uint64) uint64
38
39 Shl func(uint64, uint) uint64
40 Shr func(uint64, uint) uint64
41 }
42
43 type uint64BinaryChecked struct {
44 Add func(uint64, uint64) (uint64, error)
45 Sub func(uint64, uint64) (uint64, error)
46 Mul func(uint64, uint64) (uint64, error)
47 Div func(uint64, uint64) (uint64, error)
48
49 Shl func(uint64, uint) (uint64, error)
50 Shr func(uint64, uint) (uint64, error)
51 }
52
53 type uint64Nary struct {
54 Add func(... uint64) uint64
55 Sub func(... uint64) uint64
56 Mul func(... uint64) uint64
57 }
58
59 type uint64NaryChecked struct {
60 Add func(... uint64) (uint64, error)
61 Sub func(... uint64) (uint64, error)
62 Mul func(... uint64) (uint64, error)
63 }
64
65
66 var Uint64 = struct {
67 Unary uint64Unary
68 Binary uint64Binary
69 Nary uint64Nary
70 Reduce func(operatorIdentity uint64, operator func(uint64, uint64) uint64, elements ... uint64) uint64
71 }{
72 Unary: uint64Unary{
73 Identity: func(a uint64) uint64 { return a },
74 Not: func(a uint64) uint64 { return ^a },
75 Zero: func(a uint64) bool { return a == 0 },
76 NonZero: func(a uint64) bool { return a != 0 },
77 Positive: uint64UnaryPositive,
78 Negative: uint64UnaryNegative,
79 },
80
81 Binary: uint64Binary{
82 Add: func(a uint64, b uint64) uint64 { return a + b },
83 Sub: func(a uint64, b uint64) uint64 { return a - b },
84 Mul: func(a uint64, b uint64) uint64 { return a * b },
85 Div: func(a uint64, b uint64) uint64 { return a / b },
86
87 Eq: func(a uint64, b uint64) bool { return a == b },
88 Neq: func(a uint64, b uint64) bool { return a != b },
89 Lt: func(a uint64, b uint64) bool { return a < b },
90 Lte: func(a uint64, b uint64) bool { return a <= b },
91 Gt: func(a uint64, b uint64) bool { return a > b },
92 Gte: func(a uint64, b uint64) bool { return a >= b },
93
94 And: func(a uint64, b uint64) uint64 { return a & b },
95 Or: func(a uint64, b uint64) uint64 { return a | b },
96 Xor: func(a uint64, b uint64) uint64 { return a ^ b },
97 AndNot: func(a uint64, b uint64) uint64 { return a &^ b },
98 Mod: func(a uint64, b uint64) uint64 { return a % b },
99
100 Shl: func(a uint64, b uint) uint64 { return a << b },
101 Shr: func(a uint64, b uint) uint64 { return a >> b },
102 },
103
104 Nary: uint64Nary{
105 Add: uint64NaryAdd,
106 Mul: uint64NaryMul,
107 },
108
109 Reduce: uint64Reduce,
110 }
111
112
113
114 var Uint64Checked = struct {
115 Unary uint64UnaryChecked
116 Binary uint64BinaryChecked
117 Nary uint64NaryChecked
118 Reduce func(operatorIdentity uint64, operator func(uint64, uint64) (uint64, error), elements ... uint64) (uint64, error)
119 }{
120 Unary: uint64UnaryChecked{
121 },
122
123 Binary: uint64BinaryChecked{
124 Add: uint64BinaryCheckedAdd,
125 Sub: uint64BinaryCheckedSub,
126 Mul: uint64BinaryCheckedMul,
127 Div: uint64BinaryCheckedDiv,
128 Shl: uint64BinaryCheckedShl,
129 },
130
131 Nary: uint64NaryChecked{
132 Add: uint64NaryCheckedAdd,
133 Mul: uint64NaryCheckedMul,
134 },
135
136 Reduce: uint64CheckedReduce,
137 }
138
139 func uint64UnaryPositive(a uint64) bool {
140 return a > 0
141 }
142
143 func uint64UnaryNegative(a uint64) bool {
144 return a < 0
145 }
146
147
148
149
150 func uint64BinaryCheckedAdd(a uint64, b uint64) (v uint64, err error) {
151 if (b > 0) && (a > (maxUint64 - b)) { return v, ErrorOverflow }
152 if (b < 0) && (a < (minUint64 - b)) { return v, ErrorOverflow }
153 return a + b, nil
154 }
155
156 func uint64BinaryCheckedSub(a uint64, b uint64) (v uint64, err error) {
157 if (b < 0) && (a > (maxUint64 + b)) { return v, ErrorOverflow }
158 if (b > 0) && (a < (minUint64 + b)) { return v, ErrorOverflow }
159 return a - b, nil
160 }
161
162 func uint64BinaryCheckedMul(a uint64, b uint64) (v uint64, err error) {
163 if (a > (maxUint64 / b)) { return v, ErrorOverflow }
164 if (a < (minUint64 / b)) { return v, ErrorOverflow }
165
166 return a * b, nil
167 }
168
169 func uint64BinaryCheckedDiv(a uint64, b uint64) (v uint64, err error) {
170 if (b == 0) { return v, ErrorUndefined }
171
172 return a / b, nil
173 }
174
175 func uint64BinaryCheckedShl(a uint64, b uint) (v uint64, err error) {
176 if b > uint(uint64MostSignificantBit(maxUint64)) { return v, ErrorOverflow }
177 return v, err
178 }
179
180 func uint64MostSignificantBit(a uint64) (result int) {
181 for a > 0 {
182 a >>= 1
183 result++
184 }
185 return result;
186 }
187
188 func uint64NaryAdd(xs ... uint64) (result uint64) {
189 for i := 0; i < len(xs); i++ {
190 result += xs[i]
191 }
192 return result
193 }
194
195 func uint64NaryCheckedAdd(xs ... uint64) (result uint64, err error) {
196 for i := 0; i < len(xs); i++ {
197 result, err = uint64BinaryCheckedAdd(result, xs[i])
198 if err != nil { return result, err }
199 }
200 return result, nil
201 }
202
203 func uint64NaryMul(xs ... uint64) (result uint64) {
204 result = 1
205 for i := 0; i < len(xs); i++ {
206 result *= xs[i]
207 }
208 return result
209 }
210
211 func uint64NaryCheckedMul(xs ... uint64) (result uint64, err error) {
212 result = 1
213 for i := 0; i < len(xs); i++ {
214 result, err = uint64BinaryCheckedMul(result, xs[i])
215 if err != nil { return result, err }
216 }
217 return result, nil
218 }
219
220 func uint64Reduce(operatorIdentity uint64, operator func(uint64, uint64) uint64, elements ... uint64) (result uint64) {
221 result = operatorIdentity
222 for i := 0; i < len(elements); i++ {
223 result = operator(result, elements[i])
224 }
225 return result
226 }
227
228 func uint64CheckedReduce(operatorIdentity uint64, operator func(uint64, uint64) (uint64, error), elements ... uint64) (result uint64, err error) {
229 result = operatorIdentity
230 for i := 0; i < len(elements); i++ {
231 result, err = operator(result, elements[i])
232 if err != nil { return result, err }
233 }
234 return result, err
235 }
236
237
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