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59 lines
1.6 KiB
59 lines
1.6 KiB
/*
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* Minio Cloud Storage, (C) 2016 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 main
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import (
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"bytes"
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"io"
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"math/rand"
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"time"
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)
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// randInts - uses Knuth Fisher-Yates shuffle algorithm for generating uniform shuffling.
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func randInts(count int) []int {
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rand.Seed(time.Now().UTC().UnixNano()) // Seed with current time.
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ints := make([]int, count)
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for i := 0; i < count; i++ {
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ints[i] = i + 1
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}
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for i := 0; i < count; i++ {
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// Choose index uniformly in [i, count-1]
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r := i + rand.Intn(count-i)
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ints[r], ints[i] = ints[i], ints[r]
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}
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return ints
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}
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// readAll reads from bucket, object until an error or returns the data it read until io.EOF.
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func readAll(disk StorageAPI, bucket, object string) ([]byte, error) {
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var writer = new(bytes.Buffer)
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startOffset := int64(0)
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// Read until io.EOF.
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for {
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buf := make([]byte, blockSizeV1)
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n, err := disk.ReadFile(bucket, object, startOffset, buf)
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if err == io.EOF {
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break
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}
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if err != nil && err != io.EOF {
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return nil, err
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}
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writer.Write(buf[:n])
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startOffset += n
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}
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return writer.Bytes(), nil
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}
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