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//go:build unsafe
// +build unsafe
package protocol
import (
"reflect"
"unsafe"
)
type iface struct {
typ unsafe.Pointer
ptr unsafe.Pointer
}
type slice struct {
ptr unsafe.Pointer
len int
cap int
}
type index uintptr
type _type struct {
ptr unsafe.Pointer
}
func typeOf(x interface{}) _type {
return _type{ptr: ((*iface)(unsafe.Pointer(&x))).typ}
}
func elemTypeOf(x interface{}) _type {
return makeType(reflect.TypeOf(x).Elem())
}
func makeType(t reflect.Type) _type {
return _type{ptr: ((*iface)(unsafe.Pointer(&t))).ptr}
}
type value struct {
ptr unsafe.Pointer
}
func nonAddressableValueOf(x interface{}) value {
return valueOf(x)
}
func valueOf(x interface{}) value {
return value{ptr: ((*iface)(unsafe.Pointer(&x))).ptr}
}
func makeValue(t reflect.Type) value {
return value{ptr: unsafe.Pointer(reflect.New(t).Pointer())}
}
func (v value) bool() bool { return *(*bool)(v.ptr) }
func (v value) int8() int8 { return *(*int8)(v.ptr) }
func (v value) int16() int16 { return *(*int16)(v.ptr) }
func (v value) int32() int32 { return *(*int32)(v.ptr) }
func (v value) int64() int64 { return *(*int64)(v.ptr) }
func (v value) float64() float64 { return *(*float64)(v.ptr) }
func (v value) string() string { return *(*string)(v.ptr) }
func (v value) bytes() []byte { return *(*[]byte)(v.ptr) }
func (v value) iface(t reflect.Type) interface{} {
return *(*interface{})(unsafe.Pointer(&iface{
typ: ((*iface)(unsafe.Pointer(&t))).ptr,
ptr: v.ptr,
}))
}
func (v value) array(t reflect.Type) array {
return array{
size: uintptr(t.Size()),
elem: ((*slice)(v.ptr)).ptr,
len: ((*slice)(v.ptr)).len,
}
}
func (v value) setBool(b bool) { *(*bool)(v.ptr) = b }
func (v value) setInt8(i int8) { *(*int8)(v.ptr) = i }
func (v value) setInt16(i int16) { *(*int16)(v.ptr) = i }
func (v value) setInt32(i int32) { *(*int32)(v.ptr) = i }
func (v value) setInt64(i int64) { *(*int64)(v.ptr) = i }
func (v value) setFloat64(f float64) { *(*float64)(v.ptr) = f }
func (v value) setString(s string) { *(*string)(v.ptr) = s }
func (v value) setBytes(b []byte) { *(*[]byte)(v.ptr) = b }
func (v value) setArray(a array) { *(*slice)(v.ptr) = slice{ptr: a.elem, len: a.len, cap: a.len} }
func (v value) fieldByIndex(i index) value {
return value{ptr: unsafe.Pointer(uintptr(v.ptr) + uintptr(i))}
}
type array struct {
elem unsafe.Pointer
size uintptr
len int
}
var (
emptyArray struct{}
)
func makeArray(t reflect.Type, n int) array {
var elem unsafe.Pointer
var size = uintptr(t.Size())
if n == 0 {
elem = unsafe.Pointer(&emptyArray)
} else {
elem = unsafe_NewArray(((*iface)(unsafe.Pointer(&t))).ptr, n)
}
return array{elem: elem, size: size, len: n}
}
func (a array) index(i int) value {
return value{ptr: unsafe.Pointer(uintptr(a.elem) + (uintptr(i) * a.size))}
}
func (a array) length() int { return a.len }
func (a array) isNil() bool { return a.elem == nil }
func indexOf(s reflect.StructField) index { return index(s.Offset) }
func bytesToString(b []byte) string { return *(*string)(unsafe.Pointer(&b)) }
//go:linkname unsafe_NewArray reflect.unsafe_NewArray
func unsafe_NewArray(rtype unsafe.Pointer, length int) unsafe.Pointer
|
