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
|
package main
import (
"fmt"
"os"
)
func (p *Protocol) AddAlignGaps() {
for i := range p.Imports {
p.Imports[i].AddAlignGaps()
}
for i := range p.Types {
switch t := p.Types[i].(type) {
case *Struct:
t.Fields = addAlignGapsToFields(t.xmlName, t.Fields)
case *Event:
t.Fields = addAlignGapsToFields(t.xmlName, t.Fields)
case *Error:
t.Fields = addAlignGapsToFields(t.xmlName, t.Fields)
}
}
for i := range p.Requests {
p.Requests[i].Fields = addAlignGapsToFields(p.Requests[i].xmlName, p.Requests[i].Fields)
if p.Requests[i].Reply != nil {
p.Requests[i].Reply.Fields = addAlignGapsToFields(p.Requests[i].xmlName, p.Requests[i].Reply.Fields)
}
}
}
func addAlignGapsToFields(name string, fields []Field) []Field {
var i int
for i = 0; i < len(fields); i++ {
if _, ok := fields[i].(*ListField); ok {
break
}
}
if i >= len(fields) {
return fields
}
r := make([]Field, 0, len(fields)+2)
r = append(r, fields[:i]...)
r = append(r, fields[i])
for i = i + 1; i < len(fields); i++ {
switch f := fields[i].(type) {
case *ListField:
// ok, add padding
sz := xcbSizeOfType(f.Type)
switch {
case sz == 1:
// nothing
case sz == 2:
r = append(r, &PadField{0, 2})
case sz == 3:
panic(fmt.Errorf("Alignment is not a power of 2"))
case sz >= 4:
r = append(r, &PadField{0, 4})
}
case *LocalField:
// nothing
default:
fmt.Fprintf(os.Stderr, "Can't add alignment gaps, mix of list and non-list fields: %s\n", name)
return fields
}
r = append(r, fields[i])
}
return r
}
func xcbSizeOfField(fld Field) int {
switch f := fld.(type) {
case *PadField:
return int(f.Bytes)
case *SingleField:
return xcbSizeOfType(f.Type)
case *ListField:
return 0
case *ExprField:
return xcbSizeOfType(f.Type)
case *ValueField:
return xcbSizeOfType(f.MaskType)
case *SwitchField:
return 0
default:
return 0
}
}
func xcbSizeOfType(typ Type) int {
switch t := typ.(type) {
case *Resource:
return 4
case *TypeDef:
return t.Size().Eval()
case *Base:
return t.Size().Eval()
case *Struct:
sz := 0
for i := range t.Fields {
sz += xcbSizeOfField(t.Fields[i])
}
return sz
case *Union:
sz := 0
for i := range t.Fields {
csz := xcbSizeOfField(t.Fields[i])
if csz > sz {
sz = csz
}
}
return sz
default:
return 0
}
}
|
