ffi: Add sq_writer_stack_write_all.

1 files changed, 12 insertions, 1 deletions

diff --git a/ffi/include/sequoia/openpgp.h b/ffi/include/sequoia/openpgp.h
index f09ff1ea..23959b4b 100644
--- a/ffi/include/sequoia/openpgp.h
+++ b/ffi/include/sequoia/openpgp.h
@@ -955,11 +955,22 @@ sq_writer_stack_t sq_writer_stack_message (sq_writer_t writer);
 
 /*/
 /// Writes up to `len` bytes of `buf` into `writer`.
-o/*/
+/*/
 ssize_t sq_writer_stack_write (sq_context_t ctx, sq_writer_stack_t writer,
                                const uint8_t *buf, size_t len);
 
 /*/
+/// Writes up to `len` bytes of `buf` into `writer`.
+///
+/// Unlike sq_writer_stack_write, unless an error occurs, the whole
+/// buffer will be written.  Also, this version automatically catches
+/// EINTR.
+/*/
+sq_status_t sq_writer_stack_write_all (sq_context_t ctx,
+                                       sq_writer_stack_t writer,
+                                       const uint8_t *buf, size_t len);
+
+/*/
 /// Finalizes this writer, returning the underlying writer.
 /*/
 sq_writer_stack_t sq_writer_stack_finalize_one (sq_context_t ctx,