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refactor

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This commit is contained in:
Chris Lu 2021-08-07 14:46:23 -07:00
parent 0c0f77e2ae
commit ecb234f75a
1 changed files with 15 additions and 7 deletions
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22
weed/filer/stream.go
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@ -89,6 +89,7 @@ func ReadAll(masterClient *wdclient.MasterClient, chunks []*filer_pb.FileChunk)
// ---------------- ChunkStreamReader ----------------------------------
type ChunkStreamReader struct {
chunkViews []*ChunkView
totalSize int64
logicOffset int64
buffer []byte
bufferOffset int64
@ -107,9 +108,15 @@ func NewChunkStreamReaderFromFiler(masterClient *wdclient.MasterClient, chunks [
chunkViews := ViewFromChunks(lookupFileIdFn, chunks, 0, math.MaxInt64)
var totalSize int64
for _, chunk := range chunkViews {
totalSize += int64(chunk.Size)
}
return &ChunkStreamReader{
chunkViews: chunkViews,
lookupFileId: lookupFileIdFn,
totalSize: totalSize,
}
}
@ -119,9 +126,15 @@ func NewChunkStreamReader(filerClient filer_pb.FilerClient, chunks []*filer_pb.F
chunkViews := ViewFromChunks(lookupFileIdFn, chunks, 0, math.MaxInt64)
var totalSize int64
for _, chunk := range chunkViews {
totalSize += int64(chunk.Size)
}
return &ChunkStreamReader{
chunkViews: chunkViews,
lookupFileId: lookupFileIdFn,
totalSize: totalSize,
}
}
@ -148,20 +161,15 @@ func (c *ChunkStreamReader) isBufferEmpty() bool {
func (c *ChunkStreamReader) Seek(offset int64, whence int) (int64, error) {
var totalSize int64
for _, chunk := range c.chunkViews {
totalSize += int64(chunk.Size)
}
var err error
switch whence {
case io.SeekStart:
case io.SeekCurrent:
offset += c.bufferOffset + int64(c.bufferPos)
case io.SeekEnd:
offset = totalSize + offset
offset = c.totalSize + offset
}
if offset > totalSize {
if offset > c.totalSize {
err = io.ErrUnexpectedEOF
}