Update github.com/blevesearch/bleve v1.0.13 -> v1.0.14 (#13947)

vendor/github.com/philhofer/fwd/reader.go

@@ -34,7 +34,10 @@
 //
 package fwd
 
-import "io"
+import (
+	"io"
+	"os"
+)
 
 const (
 	// DefaultReaderSize is the default size of the read buffer
@@ -187,6 +190,19 @@ func (r *Reader) Peek(n int) ([]byte, error) {
 	return r.data[r.n : r.n+n], nil
 }
 
+// discard(n) discards up to 'n' buffered bytes, and
+// and returns the number of bytes discarded
+func (r *Reader) discard(n int) int {
+	inbuf := r.buffered()
+	if inbuf <= n {
+		r.n = 0
+		r.data = r.data[:0]
+		return inbuf
+	}
+	r.n += n
+	return n
+}
+
 // Skip moves the reader forward 'n' bytes.
 // Returns the number of bytes skipped and any
 // errors encountered. It is analogous to Seek(n, 1).
@@ -201,33 +217,25 @@ func (r *Reader) Peek(n int) ([]byte, error) {
 // will not return `io.EOF` until the next call
 // to Read.)
 func (r *Reader) Skip(n int) (int, error) {
-
-	// fast path
-	if r.buffered() >= n {
-		r.n += n
-		return n, nil
+	if n < 0 {
+		return 0, os.ErrInvalid
 	}
 
-	// use seeker implementation
-	// if we can
-	if r.rs != nil {
-		return r.skipSeek(n)
-	}
+	// discard some or all of the current buffer
+	skipped := r.discard(n)
 
-	// loop on filling
-	// and then erasing
-	o := n
-	for r.buffered() < n && r.state == nil {
+	// if we can Seek() through the remaining bytes, do that
+	if n > skipped && r.rs != nil {
+		nn, err := r.rs.Seek(int64(n-skipped), 1)
+		return int(nn) + skipped, err
+	}
+	// otherwise, keep filling the buffer
+	// and discarding it up to 'n'
+	for skipped < n && r.state == nil {
 		r.more()
-		// we can skip forward
-		// up to r.buffered() bytes
-		step := min(r.buffered(), n)
-		r.n += step
-		n -= step
+		skipped += r.discard(n - skipped)
 	}
-	// at this point, n should be
-	// 0 if everything went smoothly
-	return o - n, r.noEOF()
+	return skipped, r.noEOF()
 }
 
 // Next returns the next 'n' bytes in the stream.
@@ -262,20 +270,6 @@ func (r *Reader) Next(n int) ([]byte, error) {
 	return out, nil
 }
 
-// skipSeek uses the io.Seeker to seek forward.
-// only call this function when n > r.buffered()
-func (r *Reader) skipSeek(n int) (int, error) {
-	o := r.buffered()
-	// first, clear buffer
-	n -= o
-	r.n = 0
-	r.data = r.data[:0]
-
-	// then seek forward remaning bytes
-	i, err := r.rs.Seek(int64(n), 1)
-	return int(i) + o, err
-}
-
 // Read implements `io.Reader`
 func (r *Reader) Read(b []byte) (int, error) {
 	// if we have data in the buffer, just
@@ -381,13 +375,6 @@ func (r *Reader) WriteTo(w io.Writer) (int64, error) {
 	return i, nil
 }
 
-func min(a int, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
 func max(a int, b int) int {
 	if a < b {
 		return b