-
Notifications
You must be signed in to change notification settings - Fork 22
/
compiler.go
166 lines (143 loc) · 4.99 KB
/
compiler.go
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
/*
* Copyright 2022 ByteDance Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package encoder
import (
`fmt`
`reflect`
`strings`
`github.com/cloudwego/frugal/internal/binary/defs`
`github.com/cloudwego/frugal/internal/rt`
)
type Instr struct {
Op OpCode
Uv int32
Iv int64
To int
Vt *rt.GoType
}
type (
Program []Instr
Compiler map[reflect.Type]bool
)
func (self Instr) Disassemble() string {
switch self.Op {
case OP_size_check : fallthrough
case OP_size_const : fallthrough
case OP_size_map : fallthrough
case OP_seek : fallthrough
case OP_sint : fallthrough
case OP_length : return fmt.Sprintf("%-18s%d", self.Op, self.Iv)
case OP_size_dyn : fallthrough
case OP_memcpy_be : return fmt.Sprintf("%-18s%d, %d", self.Op, self.Uv, self.Iv)
case OP_size_defer : fallthrough
case OP_defer : fallthrough
case OP_map_begin : fallthrough
case OP_unique : return fmt.Sprintf("%-18s%s", self.Op, self.Vt)
case OP_byte : return fmt.Sprintf("%-18s0x%02x", self.Op, self.Iv)
case OP_word : return fmt.Sprintf("%-18s0x%04x", self.Op, self.Iv)
case OP_long : return fmt.Sprintf("%-18s0x%08x", self.Op, self.Iv)
case OP_quad : return fmt.Sprintf("%-18s0x%016x", self.Op, self.Iv)
case OP_map_if_next : fallthrough
case OP_map_if_empty : fallthrough
case OP_list_if_next : fallthrough
case OP_list_if_empty : fallthrough
case OP_goto : fallthrough
case OP_if_nil : fallthrough
case OP_if_hasbuf : return fmt.Sprintf("%-18sL_%d", self.Op, self.To)
default : return self.Op.String()
}
}
func (self Program) pc() int { return len(self) }
func (self Program) pin(i int) { self[i].To = self.pc() }
func (self Program) tag(n int) {
if n >= defs.StackSize {
panic("type nesting too deep")
}
}
func (self *Program) ins(iv Instr) { *self = append(*self, iv) }
func (self *Program) add(op OpCode) { self.ins(Instr{Op: op}) }
func (self *Program) jmp(op OpCode, to int) { self.ins(Instr{Op: op, To: to})}
func (self *Program) i64(op OpCode, iv int64) { self.ins(Instr{Op: op, Iv: iv})}
func (self *Program) rtt(op OpCode, vt reflect.Type) { self.ins(Instr{Op: op, Vt: rt.UnpackType(vt)})}
func (self *Program) dyn(op OpCode, uv int32, iv int64) { self.ins(Instr{Op: op, Uv: uv, Iv: iv})}
func (self Program) Free() {
freeProgram(self)
}
func (self Program) Disassemble() string {
nb := len(self)
tab := make([]bool, nb + 1)
ret := make([]string, 0, nb + 1)
/* prescan to get all the labels */
for _, ins := range self {
if _OpBranches[ins.Op] {
tab[ins.To] = true
}
}
/* disassemble each instruction */
for i, ins := range self {
if !tab[i] {
ret = append(ret, " " + ins.Disassemble())
} else {
ret = append(ret, fmt.Sprintf("L_%d:\n %s", i, ins.Disassemble()))
}
}
/* add an "end" indicator, and join all the strings */
if !tab[nb] {
return strings.Join(append(ret, " end"), "\n")
} else {
return strings.Join(append(ret, fmt.Sprintf("L_%d:", nb), " end"), "\n")
}
}
func CreateCompiler() Compiler {
return newCompiler()
}
func (self Compiler) rescue(ep *error) {
if val := recover(); val != nil {
if err, ok := val.(error); ok {
*ep = err
} else {
panic(val)
}
}
}
func (self Compiler) Free() {
freeCompiler(self)
}
func (self Compiler) Compile(vt reflect.Type) (_ Program, err error) {
ret := newProgram()
vtp := defs.ParseType(vt, "")
/* catch the exceptions, and free the type */
defer self.rescue(&err)
defer vtp.Free()
/* object measuring */
i := ret.pc()
ret.add(OP_if_hasbuf)
resetCompiler(self).measure(&ret, 0, vtp, ret.pc() + defs.MaxILBuffer / 2)
/* object encoding */
j := ret.pc()
ret.add(OP_goto)
ret.pin(i)
resetCompiler(self).compile(&ret, 0, vtp, ret.pc() + defs.MaxILBuffer / 2)
/* halt the program */
ret.pin(j)
ret.add(OP_halt)
return Optimize(ret), nil
}
func (self Compiler) CompileAndFree(vt reflect.Type) (ret Program, err error) {
ret, err = self.Compile(vt)
self.Free()
return
}