You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
873 B
Go
47 lines
873 B
Go
// SPDX-License-Identifier: Unlicense OR MIT
|
|
|
|
package unsafe
|
|
|
|
import (
|
|
"reflect"
|
|
"unsafe"
|
|
)
|
|
|
|
// BytesView returns a byte slice view of a slice.
|
|
func BytesView(s interface{}) []byte {
|
|
v := reflect.ValueOf(s)
|
|
first := v.Index(0)
|
|
sz := int(first.Type().Size())
|
|
return *(*[]byte)(unsafe.Pointer(&reflect.SliceHeader{
|
|
Data: uintptr(unsafe.Pointer((*reflect.SliceHeader)(unsafe.Pointer(first.UnsafeAddr())))),
|
|
Len: v.Len() * sz,
|
|
Cap: v.Cap() * sz,
|
|
}))
|
|
}
|
|
|
|
// SliceOf returns a slice from a (native) pointer.
|
|
func SliceOf(s uintptr) []byte {
|
|
if s == 0 {
|
|
return nil
|
|
}
|
|
sh := reflect.SliceHeader{
|
|
Data: s,
|
|
Len: 1 << 30,
|
|
Cap: 1 << 30,
|
|
}
|
|
return *(*[]byte)(unsafe.Pointer(&sh))
|
|
}
|
|
|
|
// GoString convert a NUL-terminated C string
|
|
// to a Go string.
|
|
func GoString(s []byte) string {
|
|
i := 0
|
|
for {
|
|
if s[i] == 0 {
|
|
break
|
|
}
|
|
i++
|
|
}
|
|
return string(s[:i])
|
|
}
|