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
|
/*
* Copyright 2021 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 rt
import (
"reflect"
"unsafe"
"github.com/bytedance/sonic/option"
)
//go:nosplit
func Get16(v []byte) int16 {
return *(*int16)((*GoSlice)(unsafe.Pointer(&v)).Ptr)
}
//go:nosplit
func Get32(v []byte) int32 {
return *(*int32)((*GoSlice)(unsafe.Pointer(&v)).Ptr)
}
//go:nosplit
func Get64(v []byte) int64 {
return *(*int64)((*GoSlice)(unsafe.Pointer(&v)).Ptr)
}
//go:nosplit
func Mem2Str(v []byte) (s string) {
(*GoString)(unsafe.Pointer(&s)).Len = (*GoSlice)(unsafe.Pointer(&v)).Len
(*GoString)(unsafe.Pointer(&s)).Ptr = (*GoSlice)(unsafe.Pointer(&v)).Ptr
return
}
//go:nosplit
func Str2Mem(s string) (v []byte) {
(*GoSlice)(unsafe.Pointer(&v)).Cap = (*GoString)(unsafe.Pointer(&s)).Len
(*GoSlice)(unsafe.Pointer(&v)).Len = (*GoString)(unsafe.Pointer(&s)).Len
(*GoSlice)(unsafe.Pointer(&v)).Ptr = (*GoString)(unsafe.Pointer(&s)).Ptr
return
}
func BytesFrom(p unsafe.Pointer, n int, c int) (r []byte) {
(*GoSlice)(unsafe.Pointer(&r)).Ptr = p
(*GoSlice)(unsafe.Pointer(&r)).Len = n
(*GoSlice)(unsafe.Pointer(&r)).Cap = c
return
}
func FuncAddr(f interface{}) unsafe.Pointer {
if vv := UnpackEface(f); vv.Type.Kind() != reflect.Func {
panic("f is not a function")
} else {
return *(*unsafe.Pointer)(vv.Value)
}
}
//go:nocheckptr
func IndexChar(src string, index int) unsafe.Pointer {
return unsafe.Pointer(uintptr((*GoString)(unsafe.Pointer(&src)).Ptr) + uintptr(index))
}
//go:nocheckptr
func IndexByte(ptr []byte, index int) unsafe.Pointer {
return unsafe.Pointer(uintptr((*GoSlice)(unsafe.Pointer(&ptr)).Ptr) + uintptr(index))
}
func GuardSlice(buf *[]byte, n int) {
c := cap(*buf)
l := len(*buf)
if c-l < n {
c = c>>1 + n + l
if c < 32 {
c = 32
}
tmp := make([]byte, l, c)
copy(tmp, *buf)
*buf = tmp
}
}
func GuardSlice2(buf []byte, n int) []byte {
c := cap(buf)
l := len(buf)
if c-l < n {
c = c>>1 + n + l
if c < 32 {
c = 32
}
tmp := make([]byte, l, c)
copy(tmp, buf)
buf = tmp
}
return buf
}
//go:nosplit
func Ptr2SlicePtr(s unsafe.Pointer, l int, c int) unsafe.Pointer {
slice := &GoSlice{
Ptr: s,
Len: l,
Cap: c,
}
return unsafe.Pointer(slice)
}
//go:nosplit
func StrPtr(s string) unsafe.Pointer {
return (*GoString)(unsafe.Pointer(&s)).Ptr
}
//go:nosplit
func StrFrom(p unsafe.Pointer, n int64) (s string) {
(*GoString)(unsafe.Pointer(&s)).Ptr = p
(*GoString)(unsafe.Pointer(&s)).Len = int(n)
return
}
// NoEscape hides a pointer from escape analysis. NoEscape is
// the identity function but escape analysis doesn't think the
// output depends on the input. NoEscape is inlined and currently
// compiles down to zero instructions.
// USE CAREFULLY!
//go:nosplit
//goland:noinspection GoVetUnsafePointer
func NoEscape(p unsafe.Pointer) unsafe.Pointer {
x := uintptr(p)
return unsafe.Pointer(x ^ 0)
}
//go:nosplit
func MoreStack(size uintptr)
//go:nosplit
func Add(ptr unsafe.Pointer, off uintptr) unsafe.Pointer {
return unsafe.Pointer(uintptr(ptr) + off)
}
// CanSizeResue
func CanSizeResue(cap int) bool {
return cap <= int(option.LimitBufferSize)
}
|
