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
|
package decode
import (
"bytes"
"encoding/binary"
"errors"
"github.com/wader/fq/internal/bitioex"
"github.com/wader/fq/pkg/bitio"
"github.com/wader/fq/pkg/scalar"
)
func bitBufIsZero(s scalar.BitBuf, isValidate bool) (scalar.BitBuf, error) {
br := s.Actual
isZero := true
// TODO: shared
b := make([]byte, 32*1024)
bLen := int64(len(b)) * 8
brLen, err := bitioex.Len(br)
if err != nil {
return scalar.BitBuf{}, err
}
brLeft := brLen
brPos := int64(0)
for brLeft > 0 {
rl := brLeft
if brLeft > bLen {
rl = bLen
}
// zero last byte if uneven read
if rl%8 != 0 {
b[rl/8] = 0
}
n, err := bitio.ReadAtFull(br, b, rl, brPos)
if err != nil {
return s, err
}
nb := int(bitio.BitsByteCount(n))
for i := 0; i < nb; i++ {
if b[i] != 0 {
isZero = false
break
}
}
brLeft -= n
}
if isZero {
s.Description = "all zero"
} else {
s.Description = "all not zero"
if isValidate {
return s, errors.New("validate is zero failed")
}
}
return s, nil
}
func (d *D) BitBufIsZero() scalar.BitBufMapper {
return scalar.BitBufFn(func(s scalar.BitBuf) (scalar.BitBuf, error) {
return bitBufIsZero(s, false)
})
}
func (d *D) BitBufValidateIsZero() scalar.BitBufMapper {
return scalar.BitBufFn(func(s scalar.BitBuf) (scalar.BitBuf, error) {
return bitBufIsZero(s, !d.Options.Force)
})
}
// TODO: generate?
func assertBitBuf(s scalar.BitBuf, isErr bool, bss ...[]byte) (scalar.BitBuf, error) {
bb := &bytes.Buffer{}
if _, err := bitioex.CopyBits(bb, s.Actual); err != nil {
return s, err
}
for _, bs := range bss {
if bytes.Equal(bb.Bytes(), bs) {
s.Description = "valid"
return s, nil
}
}
s.Description = "invalid"
if isErr {
return s, errors.New("failed to validate raw")
}
return s, nil
}
func (d *D) AssertBitBuf(bss ...[]byte) scalar.BitBufMapper {
return scalar.BitBufFn(func(s scalar.BitBuf) (scalar.BitBuf, error) {
return assertBitBuf(s, !d.Options.Force, bss...)
})
}
func (d *D) ValidateBitBuf(bss ...[]byte) scalar.BitBufMapper {
return scalar.BitBufFn(func(s scalar.BitBuf) (scalar.BitBuf, error) {
return assertBitBuf(s, false, bss...)
})
}
func UintAssertBytes(s scalar.Uint, isErr bool, endian Endian, bss ...[]byte) (scalar.Uint, error) {
var bo binary.ByteOrder
switch endian {
case LittleEndian:
bo = binary.BigEndian
case BigEndian:
bo = binary.BigEndian
default:
panic("invalid endian")
}
au := s.Actual
for _, bs := range bss {
var bu uint64
switch len(bs) {
case 1:
bu = uint64(bs[0])
case 2:
bu = uint64(bo.Uint16(bs))
case 4:
bu = uint64(bo.Uint32(bs))
case 8:
bu = bo.Uint64(bs)
default:
panic("invalid bs length")
}
if au == bu {
s.Description = "valid"
return s, nil
}
}
s.Description = "invalid"
if isErr {
return s, errors.New("failed to validate raw")
}
return s, nil
}
func (d *D) UintAssertBytes(bss ...[]byte) scalar.UintMapper {
return scalar.UintFn(func(s scalar.Uint) (scalar.Uint, error) {
return UintAssertBytes(s, true, d.Endian, bss...)
})
}
func (d *D) UintValidateBytes(bss ...[]byte) scalar.UintMapper {
return scalar.UintFn(func(s scalar.Uint) (scalar.Uint, error) {
return UintAssertBytes(s, false, d.Endian, bss...)
})
}
func (d *D) AssertULEBytes(bss ...[]byte) scalar.UintMapper {
return scalar.UintFn(func(s scalar.Uint) (scalar.Uint, error) {
return UintAssertBytes(s, true, LittleEndian, bss...)
})
}
func (d *D) UintValidateLEBytes(bss ...[]byte) scalar.UintMapper {
return scalar.UintFn(func(s scalar.Uint) (scalar.Uint, error) {
return UintAssertBytes(s, false, LittleEndian, bss...)
})
}
func (d *D) AssertUBEBytes(bss ...[]byte) scalar.UintMapper {
return scalar.UintFn(func(s scalar.Uint) (scalar.Uint, error) {
return UintAssertBytes(s, true, BigEndian, bss...)
})
}
func (d *D) UintValidateBEBytes(bss ...[]byte) scalar.UintMapper {
return scalar.UintFn(func(s scalar.Uint) (scalar.Uint, error) {
return UintAssertBytes(s, false, BigEndian, bss...)
})
}
|
