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// Copyright 2023 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.

//go:build !purego

package maphash

import (
	"unsafe"
)

//go:linkname runtime_rand runtime.rand
func runtime_rand() uint64

//go:linkname runtime_memhash runtime.memhash
//go:noescape
func runtime_memhash(p unsafe.Pointer, seed, s uintptr) uintptr

func rthash(buf []byte, seed uint64) uint64 {
	if len(buf) == 0 {
		return seed
	}
	len := len(buf)
	// The runtime hasher only works on uintptr. For 64-bit
	// architectures, we use the hasher directly. Otherwise,
	// we use two parallel hashers on the lower and upper 32 bits.
	if unsafe.Sizeof(uintptr(0)) == 8 {
		return uint64(runtime_memhash(unsafe.Pointer(&buf[0]), uintptr(seed), uintptr(len)))
	}
	lo := runtime_memhash(unsafe.Pointer(&buf[0]), uintptr(seed), uintptr(len))
	hi := runtime_memhash(unsafe.Pointer(&buf[0]), uintptr(seed>>32), uintptr(len))
	return uint64(hi)<<32 | uint64(lo)
}

func rthashString(s string, state uint64) uint64 {
	buf := unsafe.Slice(unsafe.StringData(s), len(s))
	return rthash(buf, state)
}

func randUint64() uint64 {
	return runtime_rand()
}

Batal

⬅ hash 6 item

Nama	Tipe	Ukuran	Diubah	Aksi
🔵example_test.go	go	933 B	2024-02-02 18:09	✏️ 👁️
🔵maphash.go	go	7.9 KB	2024-02-02 18:09	✏️ 👁️
🔵maphash_purego.go	go	2.2 KB	2024-02-02 18:09	✏️ 👁️
🔵maphash_runtime.go	go	1.2 KB	2024-02-02 18:09	✏️ 👁️
🔵maphash_test.go	go	5.2 KB	2024-02-02 18:09	✏️ 👁️
🔵smhasher_test.go	go	10.6 KB	2024-02-02 18:09	✏️ 👁️

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