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64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
package httpsfv
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import (
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"errors"
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"fmt"
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)
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// ErrUnexpectedEndOfString is returned when the end of string is unexpected.
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var ErrUnexpectedEndOfString = errors.New("unexpected end of string")
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// ErrUnrecognizedCharacter is returned when an unrecognized character in encountered.
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var ErrUnrecognizedCharacter = errors.New("unrecognized character")
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// UnmarshalError contains the underlying parsing error and the position at which it occurred.
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type UnmarshalError struct {
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off int
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err error
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}
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func (e *UnmarshalError) Error() string {
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if e.err != nil {
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return fmt.Sprintf("%s: character %d", e.err, e.off)
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}
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return fmt.Sprintf("unmarshal error: character %d", e.off)
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}
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func (e *UnmarshalError) Unwrap() error {
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return e.err
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}
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type scanner struct {
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data string
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off int
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}
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// scanWhileSp consumes spaces.
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func (s *scanner) scanWhileSp() {
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for !s.eof() {
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if s.data[s.off] != ' ' {
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return
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}
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s.off++
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}
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}
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// scanWhileOWS consumes optional white space (OWS) characters.
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func (s *scanner) scanWhileOWS() {
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for !s.eof() {
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c := s.data[s.off]
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if c != ' ' && c != '\t' {
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return
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}
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s.off++
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}
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}
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// eof returns true if the parser consumed all available characters.
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func (s *scanner) eof() bool {
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return s.off == len(s.data)
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}
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