forked from cerc-io/plugeth
289b30715d
This commit converts the dependency management from Godeps to the vendor folder, also switching the tool from godep to trash. Since the upstream tool lacks a few features proposed via a few PRs, until those PRs are merged in (if), use github.com/karalabe/trash. You can update dependencies via trash --update. All dependencies have been updated to their latest version. Parts of the build system are reworked to drop old notions of Godeps and invocation of the go vet command so that it doesn't run against the vendor folder, as that will just blow up during vetting. The conversion drops OpenCL (and hence GPU mining support) from ethash and our codebase. The short reasoning is that there's noone to maintain and having opencl libs in our deps messes up builds as go install ./... tries to build them, failing with unsatisfied link errors for the C OpenCL deps. golang.org/x/net/context is not vendored in. We expect it to be fetched by the user (i.e. using go get). To keep ci.go builds reproducible the package is "vendored" in build/_vendor.
144 lines
3.7 KiB
Go
144 lines
3.7 KiB
Go
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
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// All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package leveldb
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import (
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"encoding/binary"
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"fmt"
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"github.com/syndtr/goleveldb/leveldb/errors"
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"github.com/syndtr/goleveldb/leveldb/storage"
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)
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// ErrInternalKeyCorrupted records internal key corruption.
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type ErrInternalKeyCorrupted struct {
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Ikey []byte
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Reason string
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}
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func (e *ErrInternalKeyCorrupted) Error() string {
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return fmt.Sprintf("leveldb: internal key %q corrupted: %s", e.Ikey, e.Reason)
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}
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func newErrInternalKeyCorrupted(ikey []byte, reason string) error {
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return errors.NewErrCorrupted(storage.FileDesc{}, &ErrInternalKeyCorrupted{append([]byte{}, ikey...), reason})
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}
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type keyType uint
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func (kt keyType) String() string {
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switch kt {
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case keyTypeDel:
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return "d"
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case keyTypeVal:
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return "v"
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}
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return fmt.Sprintf("<invalid:%#x>", uint(kt))
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}
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// Value types encoded as the last component of internal keys.
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// Don't modify; this value are saved to disk.
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const (
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keyTypeDel = keyType(0)
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keyTypeVal = keyType(1)
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)
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// keyTypeSeek defines the keyType that should be passed when constructing an
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// internal key for seeking to a particular sequence number (since we
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// sort sequence numbers in decreasing order and the value type is
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// embedded as the low 8 bits in the sequence number in internal keys,
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// we need to use the highest-numbered ValueType, not the lowest).
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const keyTypeSeek = keyTypeVal
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const (
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// Maximum value possible for sequence number; the 8-bits are
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// used by value type, so its can packed together in single
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// 64-bit integer.
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keyMaxSeq = (uint64(1) << 56) - 1
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// Maximum value possible for packed sequence number and type.
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keyMaxNum = (keyMaxSeq << 8) | uint64(keyTypeSeek)
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)
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// Maximum number encoded in bytes.
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var keyMaxNumBytes = make([]byte, 8)
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func init() {
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binary.LittleEndian.PutUint64(keyMaxNumBytes, keyMaxNum)
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}
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type internalKey []byte
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func makeInternalKey(dst, ukey []byte, seq uint64, kt keyType) internalKey {
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if seq > keyMaxSeq {
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panic("leveldb: invalid sequence number")
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} else if kt > keyTypeVal {
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panic("leveldb: invalid type")
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}
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dst = ensureBuffer(dst, len(ukey)+8)
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copy(dst, ukey)
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binary.LittleEndian.PutUint64(dst[len(ukey):], (seq<<8)|uint64(kt))
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return internalKey(dst)
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}
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func parseInternalKey(ik []byte) (ukey []byte, seq uint64, kt keyType, err error) {
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if len(ik) < 8 {
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return nil, 0, 0, newErrInternalKeyCorrupted(ik, "invalid length")
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}
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num := binary.LittleEndian.Uint64(ik[len(ik)-8:])
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seq, kt = uint64(num>>8), keyType(num&0xff)
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if kt > keyTypeVal {
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return nil, 0, 0, newErrInternalKeyCorrupted(ik, "invalid type")
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}
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ukey = ik[:len(ik)-8]
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return
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}
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func validInternalKey(ik []byte) bool {
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_, _, _, err := parseInternalKey(ik)
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return err == nil
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}
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func (ik internalKey) assert() {
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if ik == nil {
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panic("leveldb: nil internalKey")
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}
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if len(ik) < 8 {
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panic(fmt.Sprintf("leveldb: internal key %q, len=%d: invalid length", []byte(ik), len(ik)))
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}
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}
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func (ik internalKey) ukey() []byte {
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ik.assert()
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return ik[:len(ik)-8]
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}
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func (ik internalKey) num() uint64 {
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ik.assert()
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return binary.LittleEndian.Uint64(ik[len(ik)-8:])
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}
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func (ik internalKey) parseNum() (seq uint64, kt keyType) {
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num := ik.num()
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seq, kt = uint64(num>>8), keyType(num&0xff)
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if kt > keyTypeVal {
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panic(fmt.Sprintf("leveldb: internal key %q, len=%d: invalid type %#x", []byte(ik), len(ik), kt))
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}
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return
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}
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func (ik internalKey) String() string {
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if ik == nil {
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return "<nil>"
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}
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if ukey, seq, kt, err := parseInternalKey(ik); err == nil {
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return fmt.Sprintf("%s,%s%d", shorten(string(ukey)), kt, seq)
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}
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return fmt.Sprintf("<invalid:%#x>", []byte(ik))
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}
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