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author | Christopher Speller <crspeller@gmail.com> | 2017-07-20 15:22:49 -0700 |
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committer | GitHub <noreply@github.com> | 2017-07-20 15:22:49 -0700 |
commit | 58839cefb50e56ae5b157b37e9814ae83ceee70b (patch) | |
tree | 5de966481678096fc9567f74f96673b34a65127c /vendor/github.com/pelletier/go-buffruneio/buffruneio.go | |
parent | e2f4492eadb5d3c58606b1fdd5774b63a07c236a (diff) | |
download | chat-58839cefb50e56ae5b157b37e9814ae83ceee70b.tar.gz chat-58839cefb50e56ae5b157b37e9814ae83ceee70b.tar.bz2 chat-58839cefb50e56ae5b157b37e9814ae83ceee70b.zip |
Upgrading server dependancies (#6984)
Diffstat (limited to 'vendor/github.com/pelletier/go-buffruneio/buffruneio.go')
-rw-r--r-- | vendor/github.com/pelletier/go-buffruneio/buffruneio.go | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/vendor/github.com/pelletier/go-buffruneio/buffruneio.go b/vendor/github.com/pelletier/go-buffruneio/buffruneio.go deleted file mode 100644 index 4e6d6ea61..000000000 --- a/vendor/github.com/pelletier/go-buffruneio/buffruneio.go +++ /dev/null @@ -1,117 +0,0 @@ -// Package buffruneio is a wrapper around bufio to provide buffered runes access with unlimited unreads. -package buffruneio - -import ( - "bufio" - "container/list" - "errors" - "io" -) - -// Rune to indicate end of file. -const ( - EOF = -(iota + 1) -) - -// ErrNoRuneToUnread is returned by UnreadRune() when the read index is already at the beginning of the buffer. -var ErrNoRuneToUnread = errors.New("no rune to unwind") - -// Reader implements runes buffering for an io.Reader object. -type Reader struct { - buffer *list.List - current *list.Element - input *bufio.Reader -} - -// NewReader returns a new Reader. -func NewReader(rd io.Reader) *Reader { - return &Reader{ - buffer: list.New(), - input: bufio.NewReader(rd), - } -} - -type runeWithSize struct { - r rune - size int -} - -func (rd *Reader) feedBuffer() error { - r, size, err := rd.input.ReadRune() - - if err != nil { - if err != io.EOF { - return err - } - r = EOF - } - - newRuneWithSize := runeWithSize{r, size} - - rd.buffer.PushBack(newRuneWithSize) - if rd.current == nil { - rd.current = rd.buffer.Back() - } - return nil -} - -// ReadRune reads the next rune from buffer, or from the underlying reader if needed. -func (rd *Reader) ReadRune() (rune, int, error) { - if rd.current == rd.buffer.Back() || rd.current == nil { - err := rd.feedBuffer() - if err != nil { - return EOF, 0, err - } - } - - runeWithSize := rd.current.Value.(runeWithSize) - rd.current = rd.current.Next() - return runeWithSize.r, runeWithSize.size, nil -} - -// UnreadRune pushes back the previously read rune in the buffer, extending it if needed. -func (rd *Reader) UnreadRune() error { - if rd.current == rd.buffer.Front() { - return ErrNoRuneToUnread - } - if rd.current == nil { - rd.current = rd.buffer.Back() - } else { - rd.current = rd.current.Prev() - } - return nil -} - -// Forget removes runes stored before the current stream position index. -func (rd *Reader) Forget() { - if rd.current == nil { - rd.current = rd.buffer.Back() - } - for ; rd.current != rd.buffer.Front(); rd.buffer.Remove(rd.current.Prev()) { - } -} - -// PeekRune returns at most the next n runes, reading from the uderlying source if -// needed. Does not move the current index. It includes EOF if reached. -func (rd *Reader) PeekRunes(n int) []rune { - res := make([]rune, 0, n) - cursor := rd.current - for i := 0; i < n; i++ { - if cursor == nil { - err := rd.feedBuffer() - if err != nil { - return res - } - cursor = rd.buffer.Back() - } - if cursor != nil { - r := cursor.Value.(runeWithSize).r - res = append(res, r) - if r == EOF { - return res - } - cursor = cursor.Next() - } - } - return res -} |