Add mutt_buffer helpers for base64 conversion.

Add mutt_buffer_from_base64() mutt_buffer_to_base64() to help with
transitioning to buffers.

2 files changed, 24 insertions, 0 deletions

diff --git a/base64.c b/base64.c
index 4e772ee1..d942e546 100644
--- a/base64.c
+++ b/base64.c
@@ -48,6 +48,14 @@
 
 #define BAD     -1
 
+void mutt_buffer_to_base64 (BUFFER *out, const unsigned char *in, size_t len)
+{
+  mutt_buffer_increase_size (out,
+                             ((len * 2) > LONG_STRING) ? (len * 2) : LONG_STRING);
+  mutt_to_base64 ((unsigned char *)out->data, in, len, out->dsize);
+  mutt_buffer_fix_dptr (out);
+}
+
 /* raw bytes to null-terminated base 64 string */
 void mutt_to_base64 (unsigned char *out, const unsigned char *in, size_t len,
 		     size_t olen)
@@ -79,6 +87,20 @@ void mutt_to_base64 (unsigned char *out, const unsigned char *in, size_t len,
   *out = '\0';
 }
 
+int mutt_buffer_from_base64 (BUFFER *out, const char *in)
+{
+  int olen;
+
+  mutt_buffer_increase_size (out, mutt_strlen (in));
+  olen = mutt_from_base64 (out->data, in, out->dsize);
+  if (olen > 0)
+    out->dptr = out->data + olen;
+  else
+    out->dptr = out->data;
+
+  return olen;
+}
+
 /* Convert '\0'-terminated base 64 string to raw bytes.
  * Returns length of returned buffer, or -1 on error */
 int mutt_from_base64 (char *out, const char *in, size_t olen)
diff --git a/protos.h b/protos.h
index 18798f80..68a617e4 100644
--- a/protos.h
+++ b/protos.h
@@ -406,6 +406,8 @@ ADDRESS *alias_reverse_lookup (ADDRESS *);
 /* base64.c */
 void mutt_to_base64 (unsigned char*, const unsigned char*, size_t, size_t);
 int mutt_from_base64 (char*, const char*, size_t);
+void mutt_buffer_to_base64 (BUFFER *, const unsigned char *, size_t);
+int mutt_buffer_from_base64 (BUFFER *, const char *);
 
 /* utf8.c */
 int mutt_wctoutf8 (char *s, unsigned int c, size_t buflen);