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prevent empty read in Reader

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This commit is contained in:
Darien Raymond 2018-03-29 10:40:18 +02:00
parent fc7da93d06
commit babd0107cf
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GPG Key ID: 7251FFA14BB18169
1 changed files with 28 additions and 20 deletions
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48
common/buf/reader.go
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@ -23,15 +23,19 @@ const xlSize = 128 * 1024
func (r *BytesToBufferReader) readSmall() (MultiBuffer, error) {
b := New()
err := b.Reset(ReadFrom(r.Reader))
if b.IsFull() {
r.buffer = newBytes(Size + 1)
for {
err := b.Reset(ReadFrom(r.Reader))
if b.IsFull() {
r.buffer = newBytes(Size + 1)
}
if !b.IsEmpty() {
return NewMultiBufferValue(b), nil
}
if err != nil {
b.Release()
return nil, err
}
}
if !b.IsEmpty() {
return NewMultiBufferValue(b), nil
}
b.Release()
return nil, err
}
// ReadMultiBuffer implements Reader.
@ -40,22 +44,26 @@ func (r *BytesToBufferReader) ReadMultiBuffer() (MultiBuffer, error) {
return r.readSmall()
}
nBytes, err := r.Reader.Read(r.buffer)
if nBytes > 0 {
mb := NewMultiBufferCap(nBytes/Size + 1)
mb.Write(r.buffer[:nBytes])
if nBytes == len(r.buffer) && nBytes < xlSize {
freeBytes(r.buffer)
r.buffer = newBytes(uint32(nBytes) + 1)
} else if nBytes < Size {
for {
nBytes, err := r.Reader.Read(r.buffer)
if nBytes > 0 {
mb := NewMultiBufferCap(nBytes/Size + 1)
mb.Write(r.buffer[:nBytes])
if nBytes == len(r.buffer) && nBytes < xlSize {
freeBytes(r.buffer)
r.buffer = newBytes(uint32(nBytes) + 1)
} else if nBytes < Size {
freeBytes(r.buffer)
r.buffer = nil
}
return mb, nil
}
if err != nil {
freeBytes(r.buffer)
r.buffer = nil
return nil, err
}
return mb, nil
}
freeBytes(r.buffer)
r.buffer = nil
return nil, err
}
// BufferedReader is a Reader that keeps its internal buffer.