diff options
| -rw-r--r-- | lib/bytes/bytes.go | 32 | ||||
| -rw-r--r-- | lib/bytes/bytes_example_test.go | 60 |
2 files changed, 86 insertions, 6 deletions
diff --git a/lib/bytes/bytes.go b/lib/bytes/bytes.go index 6e44f0a6..b47b0a85 100644 --- a/lib/bytes/bytes.go +++ b/lib/bytes/bytes.go @@ -1,6 +1,6 @@ -// Copyright 2018, Shulhan <ms@kilabit.info>. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. +// SPDX-FileCopyrightText: 2018 M. Shulhan <ms@kilabit.info> +// +// SPDX-License-Identifier: BSD-3-Clause // Package bytes provide a library for working with byte or slice of bytes. package bytes @@ -32,6 +32,19 @@ func AppendInt32(data []byte, v int32) []byte { return data } +// AppendInt64 append an int64 value into slice of byte. +func AppendInt64(data []byte, v int64) []byte { + data = append(data, byte(v>>56)) + data = append(data, byte(v>>48)) + data = append(data, byte(v>>40)) + data = append(data, byte(v>>32)) + data = append(data, byte(v>>24)) + data = append(data, byte(v>>16)) + data = append(data, byte(v>>8)) + data = append(data, byte(v)) + return data +} + // AppendUint16 append an uint16 value into slice of byte. func AppendUint16(data []byte, v uint16) []byte { data = append(data, byte(v>>8)) @@ -48,6 +61,19 @@ func AppendUint32(data []byte, v uint32) []byte { return data } +// AppendUint64 append an uint64 value into slice of byte. +func AppendUint64(data []byte, v uint64) []byte { + data = append(data, byte(v>>56)) + data = append(data, byte(v>>48)) + data = append(data, byte(v>>40)) + data = append(data, byte(v>>32)) + data = append(data, byte(v>>24)) + data = append(data, byte(v>>16)) + data = append(data, byte(v>>8)) + data = append(data, byte(v)) + return data +} + // Concat merge one or more []byte or string in args into slice of // byte. // Any type that is not []byte or string in args will be ignored. diff --git a/lib/bytes/bytes_example_test.go b/lib/bytes/bytes_example_test.go index d1efbafe..0c2fbf49 100644 --- a/lib/bytes/bytes_example_test.go +++ b/lib/bytes/bytes_example_test.go @@ -1,6 +1,6 @@ -// Copyright 2018, Shulhan <ms@kilabit.info>. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. +// SPDX-FileCopyrightText: 2018 M. Shulhan <ms@kilabit.info> +// +// SPDX-License-Identifier: BSD-3-Clause package bytes_test @@ -38,6 +38,33 @@ func ExampleAppendInt32() { // 2147483647 => 0x7fffffff => []byte{0x7f, 0xff, 0xff, 0xff} } +func ExampleAppendInt64() { + var listInt64 = []int64{ + math.MaxInt64, + 1000, + math.MinInt64, + } + + var ( + v int64 + out []byte + ) + for _, v = range listInt64 { + out = libbytes.AppendInt64(nil, v) + fmt.Printf("%d\n=> %#x\n=> %#v\n", v, v, out) + } + // Output: + // 9223372036854775807 + // => 0x7fffffffffffffff + // => []byte{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff} + // 1000 + // => 0x3e8 + // => []byte{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3, 0xe8} + // -9223372036854775808 + // => -0x8000000000000000 + // => []byte{0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0} +} + func ExampleAppendUint16() { inputs := []uint16{0, 0xab, 0xabc, math.MaxInt16, math.MaxUint16} for _, v := range inputs { @@ -78,6 +105,33 @@ func ExampleAppendUint32() { // 1 => 0x1 => []byte{0x0, 0x0, 0x0, 0x1} } +func ExampleAppendUint64() { + var listUint64 = []uint64{ + math.MaxUint64, + math.MaxInt64, + 1000, + } + + var ( + v uint64 + out []byte + ) + for _, v = range listUint64 { + out = libbytes.AppendUint64(nil, v) + fmt.Printf("%d\n=> %#x\n=> %#v\n", v, v, out) + } + // Output: + // 18446744073709551615 + // => 0xffffffffffffffff + // => []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff} + // 9223372036854775807 + // => 0x7fffffffffffffff + // => []byte{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff} + // 1000 + // => 0x3e8 + // => []byte{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3, 0xe8} +} + func ExampleConcat() { fmt.Printf("%s\n", libbytes.Concat()) fmt.Printf("%s\n", libbytes.Concat([]byte{})) |