英文:
_byteswap_ulong in Golang
问题
在Golang中，_byteswap_ulong的等效函数是什么？是否存在相应的包？
我尝试使用binary包并与reader进行操作，但无法使其正常工作。我需要在uint64变量中交换字节。
输入为2832779。输出应为8b392b。
英文:
What is the equivalent of _byteswap_ulong in Golang?
Does it exist as a package?
I tried to use the binary package and play with the reader, but couldn't get it working. I need to swap bytes in a uint64 variable.
Input is 2832779. Output should be 8b392b.
答案1
得分: 2
包encoding/binary有一个ByteOrder类型
http://golang.org/pkg/encoding/binary/#ByteOrder
binary.LittleEndian和binary.BigEndian可以让你切换到不同的字节顺序。
它并不完全相同，因为它不仅仅交换字节。但可能可以满足你的需求。
英文:
The package encoding/binary has a ByteOrder type
http://golang.org/pkg/encoding/binary/#ByteOrder
binary.LittleEndian
and
binary.BigEndian
Let you swap to different orders.
It's not exactly the same as it doesn't just swap bytes. But may get you what you need.
答案2
得分: 1
Golang 1.9在math/bits包中添加了ReverseBytes函数系列。
package main
import (
"fmt"
"math/bits"
)
func main() {
fmt.Printf("%x", bits.ReverseBytes32(2832779))
}
英文:
Golang 1.9 added ReverseBytes function family in package math/bits.
package main
import (
"fmt"
"math/bits"
)
func main() {
fmt.Printf("%x", bits.ReverseBytes32(2832779))
}
答案3
得分: 0
如@David所说，使用binary.ByteOrder类型。
package main
import (
"encoding/binary"
"fmt"
)
func main() {
value := make([]byte, 4)
// 需要提前知道字节顺序
binary.LittleEndian.PutUint32(value, 0x12345678)
fmt.Printf("%#v\n", value)
fmt.Printf("大端表示法, 0x%X\n", binary.BigEndian.Uint32(value))
fmt.Printf("小端表示法, 0x%X\n", binary.LittleEndian.Uint32(value))
}
这将输出：
[]byte{0x78, 0x56, 0x34, 0x12}
大端表示法, 0x78563412
小端表示法, 0x12345678
这些是在一个小端服务器上的大端和小端表示法。
英文:
As @David said, use the binary.ByteOrder type
package main
import (
"encoding/binary"
"fmt"
)
func main() {
value := make([]byte, 4)
// need to know the byte ordering ahead of time
binary.LittleEndian.PutUint32(value, 0x12345678)
fmt.Printf("%#v\n", value)
fmt.Printf("Big Endian Representation, 0x%X\n", binary.BigEndian.Uint32(value))
fmt.Printf("Little Endian Representation, 0x%X\n", binary.LittleEndian.Uint32(value))
}
This will output:
[]byte{0x78, 0x56, 0x34, 0x12}
Big Endian Representation, 0x78563412
Little Endian Representation, 0x12345678
These are the big-endian and little-endian representations on a little-endian server.
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