goexif: synced with upstream

Change-Id: I6198e6c7501d3c3c15671389c0065ee613d1486e

third_party/github.com/camlistore/goexif/cmd/main.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+
+	"camlistore.org/third_party/github.com/rwcarlsen/goexif/exif"
+	"camlistore.org/third_party/github.com/rwcarlsen/goexif/tiff"
+)
+
+func main() {
+	flag.Parse()
+	fname := flag.Arg(0)
+
+	f, err := os.Open(fname)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	x, err := exif.Decode(f)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	x.Walk(Walker{})
+}
+
+type Walker struct{}
+
+func (_ Walker) Walk(name string, tag *tiff.Tag) error {
+	data, _ := tag.MarshalJSON()
+	fmt.Printf("%v: %v\n", name, string(data))
+	return nil
+}

third_party/github.com/camlistore/goexif/tiff/tag.go

@@ -114,7 +114,7 @@ func (t *Tag) convertVals() {
 
 	switch t.Fmt {
 	case 2: // ascii string
-		t.strVal = string(t.Val)
+		t.strVal = string(t.Val[:len(t.Val)-1])
 	case 1:
 		var v uint8
 		t.intVals = make([]int64, int(t.Ncomp))