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@awnumar

awnumar/encoding_int64.go

Created July 1, 2017 20:32
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  1. Awn created this gist Jul 1, 2017.
    38 changes: 38 additions & 0 deletions encoding_int64.go
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,38 @@
    package main

    import (
    "fmt"
    "encoding/binary"
    )

    func main() {
    //
    // Largest signed int64 in smallest byte slice.
    //

    var signedInt64 int64 = 9223372036854775807

    a := make([]byte, 10)
    binary.PutVarint(a, signedInt64)

    decodedSignedInt64, _ := binary.Varint(a)

    fmt.Println(a, decodedSignedInt64)

    //
    // Largest unsigned int64 in smallest byte slice.
    //

    var unsignedInt64 uint64 = 18446744073709551615

    b := make([]byte, 10)
    binary.PutUvarint(b, unsignedInt64)

    decodedUnsignedInt64, _ := binary.Uvarint(b)

    fmt.Println(b, decodedUnsignedInt64)
    }

    // Output:
    // [254 255 255 255 255 255 255 255 255 1] 9223372036854775807
    // [255 255 255 255 255 255 255 255 255 1] 18446744073709551615