mirror of
https://github.com/autc04/Retro68.git
synced 2024-10-05 04:55:29 +00:00
55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
// Copyright 2021 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.
|
|
|
|
// Stuff that exists in std, but we can't use due to being a dependency
|
|
// of net, for go/build deps_test policy reasons.
|
|
|
|
package netip
|
|
|
|
func stringsLastIndexByte(s string, b byte) int {
|
|
for i := len(s) - 1; i >= 0; i-- {
|
|
if s[i] == b {
|
|
return i
|
|
}
|
|
}
|
|
return -1
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
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)
|
|
}
|
|
|
|
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)
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
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)
|
|
}
|