diff options
Diffstat (limited to 'vendor/golang.org/x/image/tiff/buffer.go')
-rw-r--r-- | vendor/golang.org/x/image/tiff/buffer.go | 69 |
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), - } -} |