[bugfix] Update exif-terminator (fix png issue) (#2391)

* [bugfix] Update exif-terminator (fix png issue)

* bump exif terminator

* fix tests

1 files changed, 67 insertions, 0 deletions

diff --git a/vendor/github.com/superseriousbusiness/go-png-image-structure/v2/utility.go b/vendor/github.com/superseriousbusiness/go-png-image-structure/v2/utility.go
new file mode 100644
index 000000000..cac6020f2
--- /dev/null
+++ b/vendor/github.com/superseriousbusiness/go-png-image-structure/v2/utility.go
@@ -0,0 +1,67 @@
+package pngstructure
+
+import (
+	"bytes"
+	"fmt"
+)
+
+func DumpBytes(data []byte) {
+	fmt.Printf("DUMP: ")
+	for _, x := range data {
+		fmt.Printf("%02x ", x)
+	}
+
+	fmt.Printf("\n")
+}
+
+func DumpBytesClause(data []byte) {
+	fmt.Printf("DUMP: ")
+
+	fmt.Printf("[]byte { ")
+
+	for i, x := range data {
+		fmt.Printf("0x%02x", x)
+
+		if i < len(data)-1 {
+			fmt.Printf(", ")
+		}
+	}
+
+	fmt.Printf(" }\n")
+}
+
+func DumpBytesToString(data []byte) (string, error) {
+	b := new(bytes.Buffer)
+
+	for i, x := range data {
+		if _, err := b.WriteString(fmt.Sprintf("%02x", x)); err != nil {
+			return "", err
+		}
+
+		if i < len(data)-1 {
+			if _, err := b.WriteRune(' '); err != nil {
+				return "", err
+			}
+		}
+	}
+
+	return b.String(), nil
+}
+
+func DumpBytesClauseToString(data []byte) (string, error) {
+	b := new(bytes.Buffer)
+
+	for i, x := range data {
+		if _, err := b.WriteString(fmt.Sprintf("0x%02x", x)); err != nil {
+			return "", err
+		}
+
+		if i < len(data)-1 {
+			if _, err := b.WriteString(", "); err != nil {
+				return "", err
+			}
+		}
+	}
+
+	return b.String(), nil
+}