Integrate public as bindata optionally (#293)

* Dropped unused codekit config

* Integrated dynamic and static bindata for public

* Ignore public bindata

* Add a general generate make task

* Integrated flexible public assets into web command

* Updated vendoring, added all missiong govendor deps

* Made the linter happy with the bindata and dynamic code

* Moved public bindata definition to modules directory

* Ignoring the new bindata path now

* Updated to the new public modules import path

* Updated public bindata command and drop the new prefix

vendor/github.com/pingcap/tidb/util/codec/number.go

@@ -0,0 +1,170 @@
+// Copyright 2015 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package codec
+
+import (
+	"encoding/binary"
+
+	"github.com/juju/errors"
+)
+
+const signMask uint64 = 0x8000000000000000
+
+func encodeIntToCmpUint(v int64) uint64 {
+	u := uint64(v)
+	if u&signMask > 0 {
+		u &= ^signMask
+	} else {
+		u |= signMask
+	}
+
+	return u
+}
+
+func decodeCmpUintToInt(u uint64) int64 {
+	if u&signMask > 0 {
+		u &= ^signMask
+	} else {
+		u |= signMask
+	}
+
+	return int64(u)
+}
+
+// EncodeInt appends the encoded value to slice b and returns the appended slice.
+// EncodeInt guarantees that the encoded value is in ascending order for comparison.
+func EncodeInt(b []byte, v int64) []byte {
+	var data [8]byte
+	u := encodeIntToCmpUint(v)
+	binary.BigEndian.PutUint64(data[:], u)
+	return append(b, data[:]...)
+}
+
+// EncodeIntDesc appends the encoded value to slice b and returns the appended slice.
+// EncodeIntDesc guarantees that the encoded value is in descending order for comparison.
+func EncodeIntDesc(b []byte, v int64) []byte {
+	var data [8]byte
+	u := encodeIntToCmpUint(v)
+	binary.BigEndian.PutUint64(data[:], ^u)
+	return append(b, data[:]...)
+}
+
+// DecodeInt decodes value encoded by EncodeInt before.
+// It returns the leftover un-decoded slice, decoded value if no error.
+func DecodeInt(b []byte) ([]byte, int64, error) {
+	if len(b) < 8 {
+		return nil, 0, errors.New("insufficient bytes to decode value")
+	}
+
+	u := binary.BigEndian.Uint64(b[:8])
+	v := decodeCmpUintToInt(u)
+	b = b[8:]
+	return b, v, nil
+}
+
+// DecodeIntDesc decodes value encoded by EncodeInt before.
+// It returns the leftover un-decoded slice, decoded value if no error.
+func DecodeIntDesc(b []byte) ([]byte, int64, error) {
+	if len(b) < 8 {
+		return nil, 0, errors.New("insufficient bytes to decode value")
+	}
+
+	u := binary.BigEndian.Uint64(b[:8])
+	v := decodeCmpUintToInt(^u)
+	b = b[8:]
+	return b, v, nil
+}
+
+// EncodeUint appends the encoded value to slice b and returns the appended slice.
+// EncodeUint guarantees that the encoded value is in ascending order for comparison.
+func EncodeUint(b []byte, v uint64) []byte {
+	var data [8]byte
+	binary.BigEndian.PutUint64(data[:], v)
+	return append(b, data[:]...)
+}
+
+// EncodeUintDesc appends the encoded value to slice b and returns the appended slice.
+// EncodeUintDesc guarantees that the encoded value is in descending order for comparison.
+func EncodeUintDesc(b []byte, v uint64) []byte {
+	var data [8]byte
+	binary.BigEndian.PutUint64(data[:], ^v)
+	return append(b, data[:]...)
+}
+
+// DecodeUint decodes value encoded by EncodeUint before.
+// It returns the leftover un-decoded slice, decoded value if no error.
+func DecodeUint(b []byte) ([]byte, uint64, error) {
+	if len(b) < 8 {
+		return nil, 0, errors.New("insufficient bytes to decode value")
+	}
+
+	v := binary.BigEndian.Uint64(b[:8])
+	b = b[8:]
+	return b, v, nil
+}
+
+// DecodeUintDesc decodes value encoded by EncodeInt before.
+// It returns the leftover un-decoded slice, decoded value if no error.
+func DecodeUintDesc(b []byte) ([]byte, uint64, error) {
+	if len(b) < 8 {
+		return nil, 0, errors.New("insufficient bytes to decode value")
+	}
+
+	data := b[:8]
+	v := binary.BigEndian.Uint64(data)
+	b = b[8:]
+	return b, ^v, nil
+}
+
+// EncodeVarint appends the encoded value to slice b and returns the appended slice.
+// Note that the encoded result is not memcomparable.
+func EncodeVarint(b []byte, v int64) []byte {
+	var data [binary.MaxVarintLen64]byte
+	n := binary.PutVarint(data[:], v)
+	return append(b, data[:n]...)
+}
+
+// DecodeVarint decodes value encoded by EncodeVarint before.
+// It returns the leftover un-decoded slice, decoded value if no error.
+func DecodeVarint(b []byte) ([]byte, int64, error) {
+	v, n := binary.Varint(b)
+	if n > 0 {
+		return b[n:], v, nil
+	}
+	if n < 0 {
+		return nil, 0, errors.New("value larger than 64 bits")
+	}
+	return nil, 0, errors.New("insufficient bytes to decode value")
+}
+
+// EncodeUvarint appends the encoded value to slice b and returns the appended slice.
+// Note that the encoded result is not memcomparable.
+func EncodeUvarint(b []byte, v uint64) []byte {
+	var data [binary.MaxVarintLen64]byte
+	n := binary.PutUvarint(data[:], v)
+	return append(b, data[:n]...)
+}
+
+// DecodeUvarint decodes value encoded by EncodeUvarint before.
+// It returns the leftover un-decoded slice, decoded value if no error.
+func DecodeUvarint(b []byte) ([]byte, uint64, error) {
+	v, n := binary.Uvarint(b)
+	if n > 0 {
+		return b[n:], v, nil
+	}
+	if n < 0 {
+		return nil, 0, errors.New("value larger than 64 bits")
+	}
+	return nil, 0, errors.New("insufficient bytes to decode value")
+}