Adding upstream version 0.0~git20231022.c6c9f9a.

Signed-off-by: Daniel Baumann <daniel@debian.org>

generate_decode_map.go

@@ -0,0 +1,58 @@
+//go:build ignore
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+)
+
+func generateDecodeMap() [256]byte {
+	const alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+
+	var decodeMap [256]byte
+	for i := 0; i < len(decodeMap); i++ {
+		decodeMap[i] = 0xff
+	}
+
+	for i := 0; i < len(alphabet); i++ {
+		decodeMap[alphabet[i]] = byte(i)
+	}
+
+	// for URL encoding
+	decodeMap['-'] = decodeMap['+']
+	decodeMap['_'] = decodeMap['/']
+
+	return decodeMap
+}
+
+func main() {
+	f, err := os.OpenFile("decode_map.go", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		log.Fatal(err)
+	}
+	m := generateDecodeMap()
+	var b bytes.Buffer
+	fmt.Fprintf(&b, "// Code generated by generate_decode_map.go. DO NOT EDIT.\n\n")
+	fmt.Fprintf(&b, "package base64dec\n\n")
+	fmt.Fprintf(&b, "var decodeMap = [256]byte{")
+	for i, v := range m {
+		if i%16 == 0 {
+			fmt.Fprintf(&b, "\n\t")
+		} else {
+			fmt.Fprint(&b, " ")
+		}
+		fmt.Fprintf(&b, "0x%02x,", v)
+	}
+	fmt.Fprintf(&b, "\n}\n")
+	_, err = f.Write(b.Bytes())
+	if err != nil {
+		log.Fatal(err)
+	}
+	err = f.Close()
+	if err != nil {
+		log.Fatal(err)
+	}
+}