core: Add Base-64 encoder.

* src/b64enc.c: Change to fit into libgpg-error.
* src/Makefile.am: Add b64enc.c
* src/b64dec.c: Use xtrymalloc etc.  Always use gpg_err_code_t.
(_gpgrt_b64dec_start): Set decoder flag
(_gpgrt_b64dec_finish): Check for conflict.
(_gpgrt_b64state): Move to ...
* src/gpgrt-int.h: here.  Add new fields.
* src/visibility.c (gpgrt_b64enc_start): New.
(gpgrt_b64enc_write): New.
(gpgrt_b64enc_finish): New.
* src/gpg-error.vers, src/gpg-error.def.in: Add new functions.
* src/gpg-error.h.in: Ditto.
* src/visibility.h: Ditto.

* tests/t-b64dec.c: Remove.
* tests/t-b64.c: New.
* tests/Makefile.am (TESTS): Replace t-b64dec by t-b64.
--

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 10 insertions, 4 deletions

diff --git a/src/gpg-error.h.in b/src/gpg-error.h.in
index c0656e2..a36e8b1 100644
--- a/src/gpg-error.h.in
+++ b/src/gpg-error.h.in
@@ -908,16 +908,22 @@ int gpgrt_vsnprintf (char *buf,size_t bufsize,
 
 
 /*
- * Base64 decode functions.
+ * Base64 encode and decode functions.
  */
 
 struct _gpgrt_b64state;
 typedef struct _gpgrt_b64state *gpgrt_b64state_t;
 
+gpgrt_b64state_t gpgrt_b64enc_start (gpgrt_stream_t stream, const char *title);
+gpg_err_code_t   gpgrt_b64enc_write (gpgrt_b64state_t state,
+                                     const void *buffer, size_t nbytes);
+gpg_err_code_t   gpgrt_b64enc_finish (gpgrt_b64state_t state);
+
 gpgrt_b64state_t gpgrt_b64dec_start (const char *title);
-gpg_error_t gpgrt_b64dec_proc (gpgrt_b64state_t state,
-                               void *buffer, size_t length, size_t *r_nbytes);
-gpg_error_t gpgrt_b64dec_finish (gpgrt_b64state_t state);
+gpg_error_t      gpgrt_b64dec_proc (gpgrt_b64state_t state,
+                                    void *buffer, size_t length,
+                                    size_t *r_nbytes);
+gpg_error_t      gpgrt_b64dec_finish (gpgrt_b64state_t state);