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// Copyright 2024 The Go Authors. All rights reserved. | ||
// Use of this source code is governed by a BSD-style | ||
// license that can be found in the LICENSE file. | ||
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// Package byteorder provides functions for decoding and encoding | ||
// little and big endian integer types from/to byte slices. | ||
package os | ||
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func LEUint16(b []byte) uint16 { | ||
_ = b[1] // bounds check hint to compiler; see golang.org/issue/14808 | ||
return uint16(b[0]) | uint16(b[1])<<8 | ||
} | ||
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||
func LEPutUint16(b []byte, v uint16) { | ||
_ = b[1] // early bounds check to guarantee safety of writes below | ||
b[0] = byte(v) | ||
b[1] = byte(v >> 8) | ||
} | ||
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||
func LEAppendUint16(b []byte, v uint16) []byte { | ||
return append(b, | ||
byte(v), | ||
byte(v>>8), | ||
) | ||
} | ||
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||
func LEUint32(b []byte) uint32 { | ||
_ = b[3] // bounds check hint to compiler; see golang.org/issue/14808 | ||
return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 | ||
} | ||
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||
func LEPutUint32(b []byte, v uint32) { | ||
_ = b[3] // early bounds check to guarantee safety of writes below | ||
b[0] = byte(v) | ||
b[1] = byte(v >> 8) | ||
b[2] = byte(v >> 16) | ||
b[3] = byte(v >> 24) | ||
} | ||
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||
func LEAppendUint32(b []byte, v uint32) []byte { | ||
return append(b, | ||
byte(v), | ||
byte(v>>8), | ||
byte(v>>16), | ||
byte(v>>24), | ||
) | ||
} | ||
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||
func LEUint64(b []byte) uint64 { | ||
_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808 | ||
return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | | ||
uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 | ||
} | ||
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||
func LEPutUint64(b []byte, v uint64) { | ||
_ = b[7] // early bounds check to guarantee safety of writes below | ||
b[0] = byte(v) | ||
b[1] = byte(v >> 8) | ||
b[2] = byte(v >> 16) | ||
b[3] = byte(v >> 24) | ||
b[4] = byte(v >> 32) | ||
b[5] = byte(v >> 40) | ||
b[6] = byte(v >> 48) | ||
b[7] = byte(v >> 56) | ||
} | ||
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||
func LEAppendUint64(b []byte, v uint64) []byte { | ||
return append(b, | ||
byte(v), | ||
byte(v>>8), | ||
byte(v>>16), | ||
byte(v>>24), | ||
byte(v>>32), | ||
byte(v>>40), | ||
byte(v>>48), | ||
byte(v>>56), | ||
) | ||
} | ||
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||
func BEUint16(b []byte) uint16 { | ||
_ = b[1] // bounds check hint to compiler; see golang.org/issue/14808 | ||
return uint16(b[1]) | uint16(b[0])<<8 | ||
} | ||
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||
func BEPutUint16(b []byte, v uint16) { | ||
_ = b[1] // early bounds check to guarantee safety of writes below | ||
b[0] = byte(v >> 8) | ||
b[1] = byte(v) | ||
} | ||
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||
func BEAppendUint16(b []byte, v uint16) []byte { | ||
return append(b, | ||
byte(v>>8), | ||
byte(v), | ||
) | ||
} | ||
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||
func BEUint32(b []byte) uint32 { | ||
_ = b[3] // bounds check hint to compiler; see golang.org/issue/14808 | ||
return uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24 | ||
} | ||
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||
func BEPutUint32(b []byte, v uint32) { | ||
_ = b[3] // early bounds check to guarantee safety of writes below | ||
b[0] = byte(v >> 24) | ||
b[1] = byte(v >> 16) | ||
b[2] = byte(v >> 8) | ||
b[3] = byte(v) | ||
} | ||
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||
func BEAppendUint32(b []byte, v uint32) []byte { | ||
return append(b, | ||
byte(v>>24), | ||
byte(v>>16), | ||
byte(v>>8), | ||
byte(v), | ||
) | ||
} | ||
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||
func BEUint64(b []byte) uint64 { | ||
_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808 | ||
return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 | | ||
uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56 | ||
} | ||
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||
func BEPutUint64(b []byte, v uint64) { | ||
_ = b[7] // early bounds check to guarantee safety of writes below | ||
b[0] = byte(v >> 56) | ||
b[1] = byte(v >> 48) | ||
b[2] = byte(v >> 40) | ||
b[3] = byte(v >> 32) | ||
b[4] = byte(v >> 24) | ||
b[5] = byte(v >> 16) | ||
b[6] = byte(v >> 8) | ||
b[7] = byte(v) | ||
} | ||
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func BEAppendUint64(b []byte, v uint64) []byte { | ||
return append(b, | ||
byte(v>>56), | ||
byte(v>>48), | ||
byte(v>>40), | ||
byte(v>>32), | ||
byte(v>>24), | ||
byte(v>>16), | ||
byte(v>>8), | ||
byte(v), | ||
) | ||
} |
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