Documentation
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Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func Bytes ¶
Bytes returns a byte slice whose underlying array starts at ptr of v and whose length and capacity are len(v). Bytes(v) is equivalent to
(*[unsafe.Sizeof(v)]byte)(unsafe.Pointer(&v))[:]
except that, as a special case, if ptr is nil and len is zero, Slice returns nil.
Example ¶
package main
import (
"fmt"
"github.com/searKing/golang/go/exp/unsafe"
)
func main() {
fmt.Printf("%v\n", unsafe.Bytes(int8(1)))
fmt.Printf("%v\n", unsafe.Bytes(int16(1)))
fmt.Printf("%v\n", unsafe.Bytes(int32(1)))
fmt.Printf("%v\n", unsafe.Bytes([0]byte{}))
fmt.Printf("%v\n", unsafe.Bytes([2]byte{}))
fmt.Printf("%v\n", unsafe.Bytes([2]byte{1, 2}))
fmt.Printf("%v\n", unsafe.Bytes(struct {
Age int8
Name [2]byte
}{Age: 1, Name: [2]byte{2, 3}}))
}
Output: [1] [1 0] [1 0 0 0] [] [0 0] [1 2] [1 2 3]
func Placement ¶
Placement returns a T pointer whose underlying bytes construct objects in allocated storage.
Construct a “T” object, placing it directly into your pre-allocated storage at memory address “s”.
except that, as a special case, if s is nil or len is zero, Placement returns nil.
Example ¶
package main
import (
"fmt"
"github.com/searKing/golang/go/exp/unsafe"
)
func main() {
fmt.Printf("%+v\n", *unsafe.Placement[int8]([]byte{1}))
fmt.Printf("%+v\n", *unsafe.Placement[int16]([]byte{1, 0}))
fmt.Printf("%+v\n", *unsafe.Placement[int32]([]byte{1, 0, 0, 0}))
fmt.Printf("%+v\n", unsafe.Placement[[0]byte](nil))
fmt.Printf("%+v\n", unsafe.Placement[[0]byte]([]byte{}))
fmt.Printf("%+v\n", unsafe.Placement[[2]byte](nil))
fmt.Printf("%+v\n", unsafe.Placement[[2]byte]([]byte{}))
fmt.Printf("%+v\n", *unsafe.Placement[[2]byte]([]byte{1, 2}))
fmt.Printf("%+v\n", *unsafe.Placement[struct {
Age int8
Name [2]byte
}]([]byte{1, 2, 3}))
}
Output: 1 1 1 <nil> <nil> <nil> <nil> [1 2] {Age:1 Name:[2 3]}
Types ¶
This section is empty.
Source Files
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