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reedsolomon-go
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fix Split panic

master
lukechampine 2015-08-08 16:10:36 -04:00
parent 42c84420f0
commit 295bf27a3d
1 changed files with 8 additions and 8 deletions
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16
reedsolomon.go
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@ -469,21 +469,21 @@ func (r reedSolomon) Split(data []byte) ([][]byte, error) {
if len(data) < r.DataShards {
return nil, ErrShortData
}
// Calculate number of bytes per shard.
perShard := (len(data) + r.DataShards - 1) / r.DataShards
// Fill data shards.
// Pad data to r.Shards*perShard.
padding := make([]byte, (r.Shards*perShard)-len(data))
data = append(data, padding...)
// Split into equal-length shards.
dst := make([][]byte, r.Shards)
for i := 0; i < r.DataShards-1; i++ {
for i := range dst {
dst[i] = data[:perShard]
data = data[perShard:]
}
// The last data shard must be zero-padded.
dst[r.DataShards-1] = append(data, make([]byte, perShard-len(data))...)
// Create empty parity shards.
for i := r.DataShards; i < r.Shards; i++ {
dst[i] = make([]byte, perShard)
}
return dst, nil
}