93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
package wire
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import (
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"encoding/binary"
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"io"
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"os"
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"time"
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"github.com/zach-klippenstein/goadb/internal/errors"
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)
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type SyncScanner interface {
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io.Closer
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StatusReader
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ReadInt32() (int32, error)
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ReadFileMode() (os.FileMode, error)
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ReadTime() (time.Time, error)
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// Reads an octet length, followed by length bytes.
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ReadString() (string, error)
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// Reads an octet length, and returns a reader that will read length
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// bytes (see io.LimitReader). The returned reader should be fully
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// read before reading anything off the Scanner again.
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ReadBytes() (io.Reader, error)
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}
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type realSyncScanner struct {
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io.Reader
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}
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func NewSyncScanner(r io.Reader) SyncScanner {
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return &realSyncScanner{r}
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}
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func (s *realSyncScanner) ReadStatus(req string) (string, error) {
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return readStatusFailureAsError(s.Reader, req, readInt32)
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}
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func (s *realSyncScanner) ReadInt32() (int32, error) {
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value, err := readInt32(s.Reader)
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return int32(value), errors.WrapErrorf(err, errors.NetworkError, "error reading int from sync scanner")
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}
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func (s *realSyncScanner) ReadFileMode() (os.FileMode, error) {
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var value uint32
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err := binary.Read(s.Reader, binary.LittleEndian, &value)
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if err != nil {
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return 0, errors.WrapErrorf(err, errors.NetworkError, "error reading filemode from sync scanner")
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}
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return ParseFileModeFromAdb(value), nil
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}
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func (s *realSyncScanner) ReadTime() (time.Time, error) {
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seconds, err := s.ReadInt32()
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if err != nil {
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return time.Time{}, errors.WrapErrorf(err, errors.NetworkError, "error reading time from sync scanner")
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}
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return time.Unix(int64(seconds), 0).UTC(), nil
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}
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func (s *realSyncScanner) ReadString() (string, error) {
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length, err := s.ReadInt32()
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if err != nil {
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return "", errors.WrapErrorf(err, errors.NetworkError, "error reading length from sync scanner")
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}
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bytes := make([]byte, length)
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n, rawErr := io.ReadFull(s.Reader, bytes)
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if rawErr != nil && rawErr != io.ErrUnexpectedEOF {
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return "", errors.WrapErrorf(rawErr, errors.NetworkError, "error reading string from sync scanner")
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} else if rawErr == io.ErrUnexpectedEOF {
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return "", errIncompleteMessage("bytes", n, int(length))
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}
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return string(bytes), nil
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}
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func (s *realSyncScanner) ReadBytes() (io.Reader, error) {
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length, err := s.ReadInt32()
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if err != nil {
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return nil, errors.WrapErrorf(err, errors.NetworkError, "error reading bytes from sync scanner")
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}
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return io.LimitReader(s.Reader, int64(length)), nil
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}
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func (s *realSyncScanner) Close() error {
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if closer, ok := s.Reader.(io.Closer); ok {
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return errors.WrapErrorf(closer.Close(), errors.NetworkError, "error closing sync scanner")
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}
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return nil
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}
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