func (t *Reader) getBlock(bi *bInfo, ro opt.ReadOptionsGetter) (b *block.Reader, err error) {
buf, err := bi.readAll(t.r, ro.HasFlag(opt.RFVerifyChecksums))
if err != nil {
return
}
b, err = block.NewReader(buf, t.o.GetComparer())
return
}
func (t *Reader) getDataIter(bi *bInfo, ro opt.ReadOptionsGetter) (it *block.Iterator, cache cache.Object, err error) {
var b *block.Reader
if t.cache != nil {
cache, _ = t.cache.Get(bi.offset, func() (ok bool, value interface{}, charge int, fin func()) {
var buf []byte
buf, err = bi.readAll(t.r, ro.HasFlag(opt.RFVerifyChecksums))
if err != nil {
return
}
b, err = block.NewReader(buf, t.o.GetComparer())
if err != nil {
return
}
ok = true
value = b
charge = int(bi.size)
return
})
if err != nil {
return
}
if b == nil {
b = cache.Value().(*block.Reader)
}
} else {
var buf []byte
buf, err = bi.readAll(t.r, ro.HasFlag(opt.RFVerifyChecksums))
if err != nil {
return
}
b, err = block.NewReader(buf, t.o.GetComparer())
if err != nil {
return
}
}
it = b.NewIterator()
return
}
func (t *Reader) getDataIter(bi *bInfo, ro opt.ReadOptionsGetter) (it *block.Iterator, cache cache.Object, err error) {
var b *block.Reader
if t.cache != nil {
var ok bool
cache, ok = t.cache.Get(bi.offset, func() (ok bool, value interface{}, charge int, fin func()) {
if ro.HasFlag(opt.RFDontFillCache) {
return
}
b, err = t.getBlock(bi, ro)
if err == nil {
ok = true
value = b
charge = int(bi.size)
}
return
})
if err != nil {
return
}
if !ok {
b, err = t.getBlock(bi, ro)
if err != nil {
return
}
} else if b == nil {
b = cache.Value().(*block.Reader)
}
} else {
b, err = t.getBlock(bi, ro)
if err != nil {
return
}
}
it = b.NewIterator()
return
}