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  1. package binary
  2. import "io"
  3. type String string
  4. // String
  5. func (self String) Equals(other interface{}) bool {
  6. return self == other
  7. }
  8. func (self String) Less(other interface{}) bool {
  9. if o, ok := other.(String); ok {
  10. return self < o
  11. } else {
  12. panic("Cannot compare unequal types")
  13. }
  14. }
  15. func (self String) ByteSize() int {
  16. return len(self) + 4
  17. }
  18. func (self String) WriteTo(w io.Writer) (n int64, err error) {
  19. var n_ int
  20. _, err = UInt32(len(self)).WriteTo(w)
  21. if err != nil {
  22. return n, err
  23. }
  24. n_, err = w.Write([]byte(self))
  25. return int64(n_ + 4), err
  26. }
  27. func ReadStringSafe(r io.Reader) (str String, n int64, err error) {
  28. length, n_, err := ReadUInt32Safe(r)
  29. n += n_
  30. if err != nil {
  31. return "", n, err
  32. }
  33. bytes := make([]byte, int(length))
  34. n__, err := io.ReadFull(r, bytes)
  35. n += int64(n__)
  36. if err != nil {
  37. return "", n, err
  38. }
  39. return String(bytes), n, nil
  40. }
  41. func ReadStringN(r io.Reader) (str String, n int64) {
  42. str, n, err := ReadStringSafe(r)
  43. if err != nil {
  44. panic(err)
  45. }
  46. return str, n
  47. }
  48. func ReadString(r io.Reader) (str String) {
  49. str, _, err := ReadStringSafe(r)
  50. if err != nil {
  51. panic(err)
  52. }
  53. return str
  54. }