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Diffstat (limited to 'vendor/golang.org/x/crypto/ssh/buffer.go')
-rw-r--r--vendor/golang.org/x/crypto/ssh/buffer.go98
1 files changed, 0 insertions, 98 deletions
diff --git a/vendor/golang.org/x/crypto/ssh/buffer.go b/vendor/golang.org/x/crypto/ssh/buffer.go
deleted file mode 100644
index 6931b51..0000000
--- a/vendor/golang.org/x/crypto/ssh/buffer.go
+++ /dev/null
@@ -1,98 +0,0 @@
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package ssh
-
-import (
- "io"
- "sync"
-)
-
-// buffer provides a linked list buffer for data exchange
-// between producer and consumer. Theoretically the buffer is
-// of unlimited capacity as it does no allocation of its own.
-type buffer struct {
- // protects concurrent access to head, tail and closed
- *sync.Cond
-
- head *element // the buffer that will be read first
- tail *element // the buffer that will be read last
-
- closed bool
-}
-
-// An element represents a single link in a linked list.
-type element struct {
- buf []byte
- next *element
-}
-
-// newBuffer returns an empty buffer that is not closed.
-func newBuffer() *buffer {
- e := new(element)
- b := &buffer{
- Cond: newCond(),
- head: e,
- tail: e,
- }
- return b
-}
-
-// write makes buf available for Read to receive.
-// buf must not be modified after the call to write.
-func (b *buffer) write(buf []byte) {
- b.Cond.L.Lock()
- e := &element{buf: buf}
- b.tail.next = e
- b.tail = e
- b.Cond.Signal()
- b.Cond.L.Unlock()
-}
-
-// eof closes the buffer. Reads from the buffer once all
-// the data has been consumed will receive os.EOF.
-func (b *buffer) eof() error {
- b.Cond.L.Lock()
- b.closed = true
- b.Cond.Signal()
- b.Cond.L.Unlock()
- return nil
-}
-
-// Read reads data from the internal buffer in buf. Reads will block
-// if no data is available, or until the buffer is closed.
-func (b *buffer) Read(buf []byte) (n int, err error) {
- b.Cond.L.Lock()
- defer b.Cond.L.Unlock()
-
- for len(buf) > 0 {
- // if there is data in b.head, copy it
- if len(b.head.buf) > 0 {
- r := copy(buf, b.head.buf)
- buf, b.head.buf = buf[r:], b.head.buf[r:]
- n += r
- continue
- }
- // if there is a next buffer, make it the head
- if len(b.head.buf) == 0 && b.head != b.tail {
- b.head = b.head.next
- continue
- }
-
- // if at least one byte has been copied, return
- if n > 0 {
- break
- }
-
- // if nothing was read, and there is nothing outstanding
- // check to see if the buffer is closed.
- if b.closed {
- err = io.EOF
- break
- }
- // out of buffers, wait for producer
- b.Cond.Wait()
- }
- return
-}