Moving to glide

2 files changed, 292 insertions, 0 deletions

diff --git a/vendor/golang.org/x/image/riff/example_test.go b/vendor/golang.org/x/image/riff/example_test.go
new file mode 100644
index 000000000..93c72b095
--- /dev/null
+++ b/vendor/golang.org/x/image/riff/example_test.go
@@ -0,0 +1,113 @@
+// Copyright 2014 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 riff_test
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"strings"
+
+	"golang.org/x/image/riff"
+)
+
+func ExampleReader() {
+	formType, r, err := riff.NewReader(strings.NewReader(data))
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("RIFF(%s)\n", formType)
+	if err := dump(r, ".\t"); err != nil {
+		log.Fatal(err)
+	}
+	// Output:
+	// RIFF(ROOT)
+	// .	ZERO ""
+	// .	ONE  "a"
+	// .	LIST(META)
+	// .	.	LIST(GOOD)
+	// .	.	.	ONE  "a"
+	// .	.	.	FIVE "klmno"
+	// .	.	ZERO ""
+	// .	.	LIST(BAD )
+	// .	.	.	THRE "def"
+	// .	TWO  "bc"
+	// .	LIST(UGLY)
+	// .	.	FOUR "ghij"
+	// .	.	SIX  "pqrstu"
+}
+
+func dump(r *riff.Reader, indent string) error {
+	for {
+		chunkID, chunkLen, chunkData, err := r.Next()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		if chunkID == riff.LIST {
+			listType, list, err := riff.NewListReader(chunkLen, chunkData)
+			if err != nil {
+				return err
+			}
+			fmt.Printf("%sLIST(%s)\n", indent, listType)
+			if err := dump(list, indent+".\t"); err != nil {
+				return err
+			}
+			continue
+		}
+		b, err := ioutil.ReadAll(chunkData)
+		if err != nil {
+			return err
+		}
+		fmt.Printf("%s%s %q\n", indent, chunkID, b)
+	}
+}
+
+func encodeU32(u uint32) string {
+	return string([]byte{
+		byte(u >> 0),
+		byte(u >> 8),
+		byte(u >> 16),
+		byte(u >> 24),
+	})
+}
+
+func encode(chunkID, contents string) string {
+	n := len(contents)
+	if n&1 == 1 {
+		contents += "\x00"
+	}
+	return chunkID + encodeU32(uint32(n)) + contents
+}
+
+func encodeMulti(typ0, typ1 string, chunks ...string) string {
+	n := 4
+	for _, c := range chunks {
+		n += len(c)
+	}
+	s := typ0 + encodeU32(uint32(n)) + typ1
+	for _, c := range chunks {
+		s += c
+	}
+	return s
+}
+
+var (
+	d0   = encode("ZERO", "")
+	d1   = encode("ONE ", "a")
+	d2   = encode("TWO ", "bc")
+	d3   = encode("THRE", "def")
+	d4   = encode("FOUR", "ghij")
+	d5   = encode("FIVE", "klmno")
+	d6   = encode("SIX ", "pqrstu")
+	l0   = encodeMulti("LIST", "GOOD", d1, d5)
+	l1   = encodeMulti("LIST", "BAD ", d3)
+	l2   = encodeMulti("LIST", "UGLY", d4, d6)
+	l01  = encodeMulti("LIST", "META", l0, d0, l1)
+	data = encodeMulti("RIFF", "ROOT", d0, d1, l01, d2, l2)
+)
diff --git a/vendor/golang.org/x/image/riff/riff.go b/vendor/golang.org/x/image/riff/riff.go
new file mode 100644
index 000000000..9b9f71d81
--- /dev/null
+++ b/vendor/golang.org/x/image/riff/riff.go
@@ -0,0 +1,179 @@
+// Copyright 2014 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 riff implements the Resource Interchange File Format, used by media
+// formats such as AVI, WAVE and WEBP.
+//
+// A RIFF stream contains a sequence of chunks. Each chunk consists of an 8-byte
+// header (containing a 4-byte chunk type and a 4-byte chunk length), the chunk
+// data (presented as an io.Reader), and some padding bytes.
+//
+// A detailed description of the format is at
+// http://www.tactilemedia.com/info/MCI_Control_Info.html
+package riff // import "golang.org/x/image/riff"
+
+import (
+	"errors"
+	"io"
+	"io/ioutil"
+	"math"
+)
+
+var (
+	errMissingPaddingByte     = errors.New("riff: missing padding byte")
+	errMissingRIFFChunkHeader = errors.New("riff: missing RIFF chunk header")
+	errShortChunkData         = errors.New("riff: short chunk data")
+	errShortChunkHeader       = errors.New("riff: short chunk header")
+	errStaleReader            = errors.New("riff: stale reader")
+)
+
+// u32 decodes the first four bytes of b as a little-endian integer.
+func u32(b []byte) uint32 {
+	return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
+}
+
+const chunkHeaderSize = 8
+
+// FourCC is a four character code.
+type FourCC [4]byte
+
+// LIST is the "LIST" FourCC.
+var LIST = FourCC{'L', 'I', 'S', 'T'}
+
+// NewReader returns the RIFF stream's form type, such as "AVI " or "WAVE", and
+// its chunks as a *Reader.
+func NewReader(r io.Reader) (formType FourCC, data *Reader, err error) {
+	var buf [chunkHeaderSize]byte
+	if _, err := io.ReadFull(r, buf[:]); err != nil {
+		if err == io.EOF || err == io.ErrUnexpectedEOF {
+			err = errMissingRIFFChunkHeader
+		}
+		return FourCC{}, nil, err
+	}
+	if buf[0] != 'R' || buf[1] != 'I' || buf[2] != 'F' || buf[3] != 'F' {
+		return FourCC{}, nil, errMissingRIFFChunkHeader
+	}
+	return NewListReader(u32(buf[4:]), r)
+}
+
+// NewListReader returns a LIST chunk's list type, such as "movi" or "wavl",
+// and its chunks as a *Reader.
+func NewListReader(chunkLen uint32, chunkData io.Reader) (listType FourCC, data *Reader, err error) {
+	if chunkLen < 4 {
+		return FourCC{}, nil, errShortChunkData
+	}
+	z := &Reader{r: chunkData}
+	if _, err := io.ReadFull(chunkData, z.buf[:4]); err != nil {
+		if err == io.EOF || err == io.ErrUnexpectedEOF {
+			err = errShortChunkData
+		}
+		return FourCC{}, nil, err
+	}
+	z.totalLen = chunkLen - 4
+	return FourCC{z.buf[0], z.buf[1], z.buf[2], z.buf[3]}, z, nil
+}
+
+// Reader reads chunks from an underlying io.Reader.
+type Reader struct {
+	r   io.Reader
+	err error
+
+	totalLen uint32
+	chunkLen uint32
+
+	chunkReader *chunkReader
+	buf         [chunkHeaderSize]byte
+	padded      bool
+}
+
+// Next returns the next chunk's ID, length and data. It returns io.EOF if there
+// are no more chunks. The io.Reader returned becomes stale after the next Next
+// call, and should no longer be used.
+//
+// It is valid to call Next even if all of the previous chunk's data has not
+// been read.
+func (z *Reader) Next() (chunkID FourCC, chunkLen uint32, chunkData io.Reader, err error) {
+	if z.err != nil {
+		return FourCC{}, 0, nil, z.err
+	}
+
+	// Drain the rest of the previous chunk.
+	if z.chunkLen != 0 {
+		_, z.err = io.Copy(ioutil.Discard, z.chunkReader)
+		if z.err != nil {
+			return FourCC{}, 0, nil, z.err
+		}
+	}
+	z.chunkReader = nil
+	if z.padded {
+		_, z.err = io.ReadFull(z.r, z.buf[:1])
+		if z.err != nil {
+			if z.err == io.EOF {
+				z.err = errMissingPaddingByte
+			}
+			return FourCC{}, 0, nil, z.err
+		}
+		z.totalLen--
+	}
+
+	// We are done if we have no more data.
+	if z.totalLen == 0 {
+		z.err = io.EOF
+		return FourCC{}, 0, nil, z.err
+	}
+
+	// Read the next chunk header.
+	if z.totalLen < chunkHeaderSize {
+		z.err = errShortChunkHeader
+		return FourCC{}, 0, nil, z.err
+	}
+	z.totalLen -= chunkHeaderSize
+	if _, err = io.ReadFull(z.r, z.buf[:chunkHeaderSize]); err != nil {
+		if z.err == io.EOF || z.err == io.ErrUnexpectedEOF {
+			z.err = errShortChunkHeader
+		}
+		return FourCC{}, 0, nil, z.err
+	}
+	chunkID = FourCC{z.buf[0], z.buf[1], z.buf[2], z.buf[3]}
+	z.chunkLen = u32(z.buf[4:])
+	z.padded = z.chunkLen&1 == 1
+	z.chunkReader = &chunkReader{z}
+	return chunkID, z.chunkLen, z.chunkReader, nil
+}
+
+type chunkReader struct {
+	z *Reader
+}
+
+func (c *chunkReader) Read(p []byte) (int, error) {
+	if c != c.z.chunkReader {
+		return 0, errStaleReader
+	}
+	z := c.z
+	if z.err != nil {
+		if z.err == io.EOF {
+			return 0, errStaleReader
+		}
+		return 0, z.err
+	}
+
+	n := int(z.chunkLen)
+	if n == 0 {
+		return 0, io.EOF
+	}
+	if n < 0 {
+		// Converting uint32 to int overflowed.
+		n = math.MaxInt32
+	}
+	if n > len(p) {
+		n = len(p)
+	}
+	n, err := z.r.Read(p[:n])
+	z.totalLen -= uint32(n)
+	z.chunkLen -= uint32(n)
+	if err != io.EOF {
+		z.err = err
+	}
+	return n, err
+}