Vendor things

third-party/vendor/data-url/src/make_base64_decode_table.py

@@ -0,0 +1,19 @@
+"""
+Generate the BASE64_DECODE_TABLE constant. See its doc-comment.
+"""
+
+import string
+
+# https://tools.ietf.org/html/rfc4648#section-4
+alphabet = string.ascii_uppercase + string.ascii_lowercase + string.digits + "+/"
+assert len(alphabet) == 64
+
+reverse_table = [-1] * 256
+for i, symbol in enumerate(alphabet):
+    reverse_table[ord(symbol)] = i
+
+print("[")
+per_line = 16
+for line in range(0, 256, per_line):
+    print("   " + "".join(" %2s," % value for value in reverse_table[line:][:per_line]))
+print("]")