XL: Cleanup, comments and all the updated functions. (#1830)

erasure.go

@@ -15,77 +15,3 @@
  */
 
 package main
-
-import (
-	"encoding/hex"
-	"hash"
-
-	"github.com/klauspost/reedsolomon"
-)
-
-// erasure storage layer.
-type erasureConfig struct {
-	reedSolomon  reedsolomon.Encoder // Erasure encoder/decoder.
-	dataBlocks   int                 // Calculated data disks.
-	storageDisks []StorageAPI        // Initialized storage disks.
-	distribution []int               // Erasure block distribution.
-	hashWriters  []hash.Hash         // Allocate hash writers.
-
-	// Carries hex checksums needed for validating Reads.
-	hashChecksums []string
-	checkSumAlgo  string
-}
-
-// newErasure instantiate a new erasure.
-func newErasure(disks []StorageAPI, distribution []int) *erasureConfig {
-	// Initialize E.
-	e := &erasureConfig{}
-
-	// Calculate data and parity blocks.
-	dataBlocks, parityBlocks := len(disks)/2, len(disks)/2
-
-	// Initialize reed solomon encoding.
-	rs, err := reedsolomon.New(dataBlocks, parityBlocks)
-	fatalIf(err, "Unable to initialize reedsolomon package.")
-
-	// Save the reedsolomon.
-	e.dataBlocks = dataBlocks
-	e.reedSolomon = rs
-
-	// Save all the initialized storage disks.
-	e.storageDisks = disks
-
-	// Save the distribution.
-	e.distribution = distribution
-
-	// Return successfully initialized.
-	return e
-}
-
-// SaveAlgo - FIXME.
-func (e *erasureConfig) SaveAlgo(algo string) {
-	e.checkSumAlgo = algo
-}
-
-// Save hex encoded hashes - saves hashes that need to be validated
-// during reads for each blocks.
-func (e *erasureConfig) SaveHashes(hashes []string) {
-	e.hashChecksums = hashes
-}
-
-// InitHash - initializes new hash for all blocks.
-func (e *erasureConfig) InitHash(algo string) {
-	e.hashWriters = make([]hash.Hash, len(e.storageDisks))
-	for index := range e.storageDisks {
-		e.hashWriters[index] = newHash(algo)
-	}
-}
-
-// GetHashes - returns a slice of hex encoded hash.
-func (e erasureConfig) GetHashes() []string {
-	var hexHashes = make([]string, len(e.storageDisks))
-	for index, hashWriter := range e.hashWriters {
-		hexHashes[index] = hex.EncodeToString(hashWriter.Sum(nil))
-	}
-	return hexHashes
-}