/
file.go
53 lines (42 loc) · 1018 Bytes
/
file.go
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// TODO Write tests
package input
import (
"io"
"os"
)
// OSFile implements ufwb.File by wrapping a os.File
type OSFile os.File
func OpenOSFile(filename string) (*OSFile, error) {
f, err := os.Open(filename)
if err != nil {
return nil, err
}
return (*OSFile)(f), nil
}
func FromOSFile(f *os.File) *OSFile {
return (*OSFile)(f)
}
func (f *OSFile) Tell() (int64, error) {
return (*os.File)(f).Seek(0, io.SeekCurrent)
}
func (f *OSFile) Read(b []byte) (int, error) {
// We require a full read, perhaps change this later
return io.ReadFull((*os.File)(f), b)
}
func (f *OSFile) ReadAt(b []byte, off int64) (int, error) {
return ReadFullAt((*os.File)(f), b, off)
}
func (f *OSFile) ReadByte() (byte, error) {
one := make([]byte, 1, 1)
_, err := io.ReadFull(f, one)
if err != nil {
return 0, err
}
return one[0], nil
}
func (f *OSFile) Seek(offset int64, whence int) (int64, error) {
return (*os.File)(f).Seek(offset, whence)
}
func (f *OSFile) Close() error {
return (*os.File)(f).Close()
}