What is func Decode(dst, src []byte, flush bool) in Golang?
func Decode(dst, src []byte, flush bool) (ndst, nsrc int, err error) is a method defined in the encoding/ascii85 package in Golang that decodes ascii-85 encoded source bytes of an array to a destination bytes array.
Decode() returns the number of bytes successfully written in the destination array, the number of bytes consumed from the source array, and a CorruptInputError.
Parameters
src: An ascii-85 encoded source byte array that will be decoded.
dst: Destination byte to the array to which the decoded output will be written.
flush: When true, Decode() processes the src array completely. When false, it waits for the completion of another 32-bit block.
Return value
ndst: Number of bytes written to dst. Type is int.
nsrc: Number of bytes consumed from src. Type is int.
Example
package mainimport ("encoding/ascii85""fmt")func main() {src1 := []byte("Ascii85 encoding in Golang.")dst1 := make([]byte, ascii85.MaxEncodedLen(len(src1)))var bytes_written int = ascii85.Encode(dst1, src1)fmt.Printf("Encoded array: %s\n", dst1)fmt.Printf("Number of bytes written: %d\n", bytes_written)dst2 := make([]byte, ascii85.MaxEncodedLen(len(dst1)))ndst, nsrc, _ := ascii85.Decode(dst2, dst1, true)fmt.Printf("Decoded array: %s\n", dst2)fmt.Printf("Number of bytes written: %d\n", ndst)fmt.Printf("Number of bytes consumed: %d\n", nsrc)}
Explanation
In the above example, we first do an ascii-85 encoding of src1 containing the string “Ascii85 encoding in Golang.” using ascii85.Encode() and store the result in dst1.
We then use the ascii85.Decode() method that decodes dst1 and stores the result in dst2. As you can observe, the Decode() method returns the original string.
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