summaryrefslogtreecommitdiffstats
path: root/vendor/golang.org/x/image/tiff/buffer.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/golang.org/x/image/tiff/buffer.go')
-rw-r--r--vendor/golang.org/x/image/tiff/buffer.go69
1 files changed, 0 insertions, 69 deletions
diff --git a/vendor/golang.org/x/image/tiff/buffer.go b/vendor/golang.org/x/image/tiff/buffer.go
deleted file mode 100644
index d1801be4..00000000
--- a/vendor/golang.org/x/image/tiff/buffer.go
+++ /dev/null
@@ -1,69 +0,0 @@
-// Copyright 2011 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 tiff
-
-import "io"
-
-// buffer buffers an io.Reader to satisfy io.ReaderAt.
-type buffer struct {
- r io.Reader
- buf []byte
-}
-
-// fill reads data from b.r until the buffer contains at least end bytes.
-func (b *buffer) fill(end int) error {
- m := len(b.buf)
- if end > m {
- if end > cap(b.buf) {
- newcap := 1024
- for newcap < end {
- newcap *= 2
- }
- newbuf := make([]byte, end, newcap)
- copy(newbuf, b.buf)
- b.buf = newbuf
- } else {
- b.buf = b.buf[:end]
- }
- if n, err := io.ReadFull(b.r, b.buf[m:end]); err != nil {
- end = m + n
- b.buf = b.buf[:end]
- return err
- }
- }
- return nil
-}
-
-func (b *buffer) ReadAt(p []byte, off int64) (int, error) {
- o := int(off)
- end := o + len(p)
- if int64(end) != off+int64(len(p)) {
- return 0, io.ErrUnexpectedEOF
- }
-
- err := b.fill(end)
- return copy(p, b.buf[o:end]), err
-}
-
-// Slice returns a slice of the underlying buffer. The slice contains
-// n bytes starting at offset off.
-func (b *buffer) Slice(off, n int) ([]byte, error) {
- end := off + n
- if err := b.fill(end); err != nil {
- return nil, err
- }
- return b.buf[off:end], nil
-}
-
-// newReaderAt converts an io.Reader into an io.ReaderAt.
-func newReaderAt(r io.Reader) io.ReaderAt {
- if ra, ok := r.(io.ReaderAt); ok {
- return ra
- }
- return &buffer{
- r: r,
- buf: make([]byte, 0, 1024),
- }
-}