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9dca46e156
Signature calculation has now moved out from being a package to top-level as a layered mechanism. In case of payload calculation with body, go-routines are initiated to simultaneously write and calculate shasum. Errors are sent over the writer so that the lower layer removes the temporary files properly.
74 lines
2.0 KiB
Go
74 lines
2.0 KiB
Go
// +build ignore
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/*
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* Minio Cloud Storage, (C) 2015 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package xl
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import (
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encoding "github.com/minio/minio/pkg/erasure"
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"github.com/minio/minio/pkg/probe"
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)
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// encoder internal struct
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type encoder struct {
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encoder *encoding.Erasure
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k, m uint8
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}
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// newEncoder - instantiate a new encoder
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func newEncoder(k, m uint8) (encoder, *probe.Error) {
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e := encoder{}
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params, err := encoding.ValidateParams(k, m)
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if err != nil {
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return encoder{}, probe.NewError(err)
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}
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e.encoder = encoding.NewErasure(params)
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e.k = k
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e.m = m
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return e, nil
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}
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// TODO - think again if this is needed
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// GetEncodedBlockLen - wrapper around erasure function with the same name
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func (e encoder) GetEncodedBlockLen(dataLength int) (int, *probe.Error) {
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if dataLength <= 0 {
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return 0, probe.NewError(InvalidArgument{})
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}
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return encoding.GetEncodedBlockLen(dataLength, e.k), nil
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}
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// Encode - erasure code input bytes
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func (e encoder) Encode(data []byte) ([][]byte, *probe.Error) {
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if data == nil {
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return nil, probe.NewError(InvalidArgument{})
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}
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encodedData, err := e.encoder.Encode(data)
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if err != nil {
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return nil, probe.NewError(err)
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}
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return encodedData, nil
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}
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// Decode - erasure decode input encoded bytes
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func (e encoder) Decode(encodedData [][]byte, dataLength int) ([]byte, *probe.Error) {
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decodedData, err := e.encoder.Decode(encodedData, dataLength)
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if err != nil {
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return nil, probe.NewError(err)
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}
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return decodedData, nil
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}
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