core: Add gpgme_data_set_flag to add more meta data to data objects.

* src/gpgme.h.in (gpgme_data_set_flag): New public function.
* src/data.c (gpgme_data_set_flag): New.
(_gpgme_data_get_size_hint): New.
* src/data.h (strucy gpgme_data): Add field 'size_hint'.
* src/gpgme.def, src/libgpgme.vers: Add new function.
* src/conversion.c (_gpgme_string_to_off): New.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 30 insertions, 0 deletions

diff --git a/src/data.c b/src/data.c
index 87b619e4..6964246a 100644
--- a/src/data.c
+++ b/src/data.c
@@ -243,6 +243,28 @@ gpgme_data_get_file_name (gpgme_data_t dh)
   return dh->file_name;
 }
 
+
+/* Set a flag for the data object DH.  See the manual for details.  */
+gpg_error_t
+gpgme_data_set_flag (gpgme_data_t dh, const char *name, const char *value)
+{
+  TRACE_BEG2 (DEBUG_DATA, "gpgme_data_set_flag", dh,
+	      "%s=%s", name, value);
+
+  if (!dh)
+    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
+
+  if (!strcmp (name, "size-hint"))
+    {
+      dh->size_hint= value? _gpgme_string_to_off (value) : 0;
+    }
+  else
+    return gpg_error (GPG_ERR_UNKNOWN_NAME);
+
+  return 0;
+}
+
+
 
 /* Functions to support the wait interface.  */
 
@@ -334,3 +356,11 @@ _gpgme_data_get_fd (gpgme_data_t dh)
     return -1;
   return (*dh->cbs->get_fd) (dh);
 }
+
+
+/* Get the size-hint value for DH or 0 if not available.  */
+gpgme_off_t
+_gpgme_data_get_size_hint (gpgme_data_t dh)
+{
+  return dh ? dh->size_hint : 0;
+}