Source file
src/tawesoft.co.uk/go/operator/uint32.go
Documentation:
src/tawesoft.co.uk/go/operator/uint32.go
1 package operator
2
3
4
5
6
7
8 type uint32Unary struct {
9 Identity func(uint32) uint32
10 Not func(uint32) uint32
11 Zero func(uint32) bool
12 NonZero func(uint32) bool
13 Positive func(uint32) bool
14 Negative func(uint32) bool
15 }
16
17 type uint32UnaryChecked struct {
18 }
19
20 type uint32Binary struct {
21 Add func(uint32, uint32) uint32
22 Sub func(uint32, uint32) uint32
23 Mul func(uint32, uint32) uint32
24 Div func(uint32, uint32) uint32
25 Mod func(uint32, uint32) uint32
26
27 Eq func(uint32, uint32) bool
28 Neq func(uint32, uint32) bool
29 Lt func(uint32, uint32) bool
30 Lte func(uint32, uint32) bool
31 Gt func(uint32, uint32) bool
32 Gte func(uint32, uint32) bool
33
34 And func(uint32, uint32) uint32
35 Or func(uint32, uint32) uint32
36 Xor func(uint32, uint32) uint32
37 AndNot func(uint32, uint32) uint32
38
39 Shl func(uint32, uint) uint32
40 Shr func(uint32, uint) uint32
41 }
42
43 type uint32BinaryChecked struct {
44 Add func(uint32, uint32) (uint32, error)
45 Sub func(uint32, uint32) (uint32, error)
46 Mul func(uint32, uint32) (uint32, error)
47 Div func(uint32, uint32) (uint32, error)
48
49 Shl func(uint32, uint) (uint32, error)
50 Shr func(uint32, uint) (uint32, error)
51 }
52
53 type uint32Nary struct {
54 Add func(... uint32) uint32
55 Sub func(... uint32) uint32
56 Mul func(... uint32) uint32
57 }
58
59 type uint32NaryChecked struct {
60 Add func(... uint32) (uint32, error)
61 Sub func(... uint32) (uint32, error)
62 Mul func(... uint32) (uint32, error)
63 }
64
65
66 var Uint32 = struct {
67 Unary uint32Unary
68 Binary uint32Binary
69 Nary uint32Nary
70 Reduce func(operatorIdentity uint32, operator func(uint32, uint32) uint32, elements ... uint32) uint32
71 }{
72 Unary: uint32Unary{
73 Identity: func(a uint32) uint32 { return a },
74 Not: func(a uint32) uint32 { return ^a },
75 Zero: func(a uint32) bool { return a == 0 },
76 NonZero: func(a uint32) bool { return a != 0 },
77 Positive: uint32UnaryPositive,
78 Negative: uint32UnaryNegative,
79 },
80
81 Binary: uint32Binary{
82 Add: func(a uint32, b uint32) uint32 { return a + b },
83 Sub: func(a uint32, b uint32) uint32 { return a - b },
84 Mul: func(a uint32, b uint32) uint32 { return a * b },
85 Div: func(a uint32, b uint32) uint32 { return a / b },
86
87 Eq: func(a uint32, b uint32) bool { return a == b },
88 Neq: func(a uint32, b uint32) bool { return a != b },
89 Lt: func(a uint32, b uint32) bool { return a < b },
90 Lte: func(a uint32, b uint32) bool { return a <= b },
91 Gt: func(a uint32, b uint32) bool { return a > b },
92 Gte: func(a uint32, b uint32) bool { return a >= b },
93
94 And: func(a uint32, b uint32) uint32 { return a & b },
95 Or: func(a uint32, b uint32) uint32 { return a | b },
96 Xor: func(a uint32, b uint32) uint32 { return a ^ b },
97 AndNot: func(a uint32, b uint32) uint32 { return a &^ b },
98 Mod: func(a uint32, b uint32) uint32 { return a % b },
99
100 Shl: func(a uint32, b uint) uint32 { return a << b },
101 Shr: func(a uint32, b uint) uint32 { return a >> b },
102 },
103
104 Nary: uint32Nary{
105 Add: uint32NaryAdd,
106 Mul: uint32NaryMul,
107 },
108
109 Reduce: uint32Reduce,
110 }
111
112
113
114 var Uint32Checked = struct {
115 Unary uint32UnaryChecked
116 Binary uint32BinaryChecked
117 Nary uint32NaryChecked
118 Reduce func(operatorIdentity uint32, operator func(uint32, uint32) (uint32, error), elements ... uint32) (uint32, error)
119 }{
120 Unary: uint32UnaryChecked{
121 },
122
123 Binary: uint32BinaryChecked{
124 Add: uint32BinaryCheckedAdd,
125 Sub: uint32BinaryCheckedSub,
126 Mul: uint32BinaryCheckedMul,
127 Div: uint32BinaryCheckedDiv,
128 Shl: uint32BinaryCheckedShl,
129 },
130
131 Nary: uint32NaryChecked{
132 Add: uint32NaryCheckedAdd,
133 Mul: uint32NaryCheckedMul,
134 },
135
136 Reduce: uint32CheckedReduce,
137 }
138
139 func uint32UnaryPositive(a uint32) bool {
140 return a > 0
141 }
142
143 func uint32UnaryNegative(a uint32) bool {
144 return a < 0
145 }
146
147
148
149
150 func uint32BinaryCheckedAdd(a uint32, b uint32) (v uint32, err error) {
151 if (b > 0) && (a > (maxUint32 - b)) { return v, ErrorOverflow }
152 if (b < 0) && (a < (minUint32 - b)) { return v, ErrorOverflow }
153 return a + b, nil
154 }
155
156 func uint32BinaryCheckedSub(a uint32, b uint32) (v uint32, err error) {
157 if (b < 0) && (a > (maxUint32 + b)) { return v, ErrorOverflow }
158 if (b > 0) && (a < (minUint32 + b)) { return v, ErrorOverflow }
159 return a - b, nil
160 }
161
162 func uint32BinaryCheckedMul(a uint32, b uint32) (v uint32, err error) {
163 if (a > (maxUint32 / b)) { return v, ErrorOverflow }
164 if (a < (minUint32 / b)) { return v, ErrorOverflow }
165
166 return a * b, nil
167 }
168
169 func uint32BinaryCheckedDiv(a uint32, b uint32) (v uint32, err error) {
170 if (b == 0) { return v, ErrorUndefined }
171
172 return a / b, nil
173 }
174
175 func uint32BinaryCheckedShl(a uint32, b uint) (v uint32, err error) {
176 if b > uint(uint32MostSignificantBit(maxUint32)) { return v, ErrorOverflow }
177 return v, err
178 }
179
180 func uint32MostSignificantBit(a uint32) (result int) {
181 for a > 0 {
182 a >>= 1
183 result++
184 }
185 return result;
186 }
187
188 func uint32NaryAdd(xs ... uint32) (result uint32) {
189 for i := 0; i < len(xs); i++ {
190 result += xs[i]
191 }
192 return result
193 }
194
195 func uint32NaryCheckedAdd(xs ... uint32) (result uint32, err error) {
196 for i := 0; i < len(xs); i++ {
197 result, err = uint32BinaryCheckedAdd(result, xs[i])
198 if err != nil { return result, err }
199 }
200 return result, nil
201 }
202
203 func uint32NaryMul(xs ... uint32) (result uint32) {
204 result = 1
205 for i := 0; i < len(xs); i++ {
206 result *= xs[i]
207 }
208 return result
209 }
210
211 func uint32NaryCheckedMul(xs ... uint32) (result uint32, err error) {
212 result = 1
213 for i := 0; i < len(xs); i++ {
214 result, err = uint32BinaryCheckedMul(result, xs[i])
215 if err != nil { return result, err }
216 }
217 return result, nil
218 }
219
220 func uint32Reduce(operatorIdentity uint32, operator func(uint32, uint32) uint32, elements ... uint32) (result uint32) {
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 uint32CheckedReduce(operatorIdentity uint32, operator func(uint32, uint32) (uint32, error), elements ... uint32) (result uint32, 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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