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|
package azblob
import (
"errors"
"io"
)
type sectionWriter struct {
count int64
offset int64
position int64
writerAt io.WriterAt
}
func newSectionWriter(c io.WriterAt, off int64, count int64) *sectionWriter {
return §ionWriter{
count: count,
offset: off,
writerAt: c,
}
}
func (c *sectionWriter) Write(p []byte) (int, error) {
remaining := c.count - c.position
if remaining <= 0 {
return 0, errors.New("End of section reached")
}
slice := p
if int64(len(slice)) > remaining {
slice = slice[:remaining]
}
n, err := c.writerAt.WriteAt(slice, c.offset+c.position)
c.position += int64(n)
if err != nil {
return n, err
}
if len(p) > n {
return n, errors.New("Not enough space for all bytes")
}
return n, nil
}
|
