File fetchmail-add-query_to64_outsize-utility-function.patch of Package fetchmail

From: Matthew Ogilvie <mmogilvi+fml@zoho.com>
Date: Fri, 21 Dec 2018 09:00:46 -0700
Subject: add query_to64_outsize() utility function
Git-repo: https://gitlab.com/fetchmail/fetchmail.git
Git-commit: cc6e146d516140df800da68976eb7c0aa1cef7c0

---
 base64.c    |    7 +++++++
 fetchmail.h |    1 +
 2 files changed, 8 insertions(+)

Index: fetchmail-6.5.1/base64.c
===================================================================
--- fetchmail-6.5.1.orig/base64.c
+++ fetchmail-6.5.1/base64.c
@@ -66,6 +66,13 @@ fail:
     return rc;
 }
 
+size_t query_to64_outsize(size_t inlen)
+/* Returns how much space needs to be allocated to receive the output from
+ * to64frombits(), including the '\0' terminator. */
+{
+    return ((inlen+2)/3)*4+1;
+}
+
 int from64tobits(void *out_, const char *in, int maxlen)
 /* base 64 to raw bytes in quasi-big-endian order, returning count of bytes */
 /* maxlen limits output buffer size, set to zero to ignore */
Index: fetchmail-6.5.1/fetchmail.h
===================================================================
--- fetchmail-6.5.1.orig/fetchmail.h
+++ fetchmail-6.5.1/fetchmail.h
@@ -611,6 +611,7 @@ int prc_filecheck(const char *, const fl
 /* base64.c */
 unsigned len64frombits(unsigned inlen); /** calculate length needed to encode inlen octets. warnings: 1. caller needs to add 1 for a trailing \0 byte himself. 2. returns 0 for inlen 0! */
 int to64frombits(char *, const void *, int inlen, size_t outlen);
+size_t query_to64_outsize(size_t inlen);
 int from64tobits(void *, const char *, int mxoutlen);
 
 /* unmime.c */