mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
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36 lines
1.2 KiB
Go
36 lines
1.2 KiB
Go
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// Copyright 2018 The LevelDB-Go and Pebble Authors. All rights reserved. Use
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// of this source code is governed by a BSD-style license that can be found in
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// the LICENSE file.
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package sstable
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import (
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"unsafe"
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"github.com/cockroachdb/pebble/internal/manual"
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)
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func getBytes(ptr unsafe.Pointer, length int) []byte {
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return (*[manual.MaxArrayLen]byte)(ptr)[:length:length]
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}
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func decodeVarint(ptr unsafe.Pointer) (uint32, unsafe.Pointer) {
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if a := *((*uint8)(ptr)); a < 128 {
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return uint32(a),
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unsafe.Pointer(uintptr(ptr) + 1)
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} else if a, b := a&0x7f, *((*uint8)(unsafe.Pointer(uintptr(ptr) + 1))); b < 128 {
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return uint32(b)<<7 | uint32(a),
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unsafe.Pointer(uintptr(ptr) + 2)
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} else if b, c := b&0x7f, *((*uint8)(unsafe.Pointer(uintptr(ptr) + 2))); c < 128 {
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return uint32(c)<<14 | uint32(b)<<7 | uint32(a),
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unsafe.Pointer(uintptr(ptr) + 3)
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} else if c, d := c&0x7f, *((*uint8)(unsafe.Pointer(uintptr(ptr) + 3))); d < 128 {
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return uint32(d)<<21 | uint32(c)<<14 | uint32(b)<<7 | uint32(a),
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unsafe.Pointer(uintptr(ptr) + 4)
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} else {
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d, e := d&0x7f, *((*uint8)(unsafe.Pointer(uintptr(ptr) + 4)))
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return uint32(e)<<28 | uint32(d)<<21 | uint32(c)<<14 | uint32(b)<<7 | uint32(a),
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unsafe.Pointer(uintptr(ptr) + 5)
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}
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}
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