X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/6b6847272dc5d21ca6fcd23bf20e16193b226c0a..d7440db1907ae920928843275dcf260934ce5acb:/h/prototypes.h

diff --git a/h/prototypes.h b/h/prototypes.h
index 5c1b5cf1..c9dd291e 100644
--- a/h/prototypes.h
+++ b/h/prototypes.h
@@ -457,6 +457,10 @@ int what_now (char *, int, int, char *, char *,
 	int, struct msgs *, char *, int, char *, int);
 int WhatNow(int, char **);
 
+/* Includes trailing NUL */
+
+#define BASE64SIZE(x) ((((x + 2) / 3) * 4) + 1)
+
 /*
  * Copy data from one file to another, converting to base64-encoding.
  *
@@ -470,8 +474,8 @@ int WhatNow(int, char **);
  */
 int writeBase64aux(FILE *in, FILE *out, int crlf);
 
-int writeBase64 (unsigned char *, size_t, unsigned char *);
-int writeBase64raw (unsigned char *, size_t, unsigned char *);
+int writeBase64 (const unsigned char *, size_t, unsigned char *);
+int writeBase64raw (const unsigned char *, size_t, unsigned char *);
 
 /*
  * first argument:  the string to be decoded