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package readers
import "io"
// ReadFill reads as much data from r into buf as it can
//
// It reads until the buffer is full or r.Read returned an error.
//
// This is io.ReadFull but when you just want as much data as
// possible, not an exact size of block.
func ReadFill(r io.Reader, buf []byte) (n int, err error) {
var nn int
for n < len(buf) && err == nil {
nn, err = r.Read(buf[n:])
n += nn
}
return n, err
}