2005-05-05 Marcus Brinkmann <[email protected]>

	* data-user.c (user_release): Only call user hook if provided.
	(user_seek): Return EBADF if no user hook is provided.
	(user_read): Likewise.
	(user_write): Likewise.

2 files changed, 18 insertions, 1 deletions

diff --git a/gpgme/ChangeLog b/gpgme/ChangeLog
index 275db84b..98f81a02 100644
--- a/gpgme/ChangeLog
+++ b/gpgme/ChangeLog
@@ -1,3 +1,10 @@
+2005-05-05  Marcus Brinkmann  <[email protected]>
+
+	* data-user.c (user_release): Only call user hook if provided.
+	(user_seek): Return EBADF if no user hook is provided.
+	(user_read): Likewise.
+	(user_write): Likewise.
+
 2005-04-28  Marcus Brinkmann  <[email protected]>
 
 	* gpgme.h (GPGME_INCLUDE_CERTS_DEFAULT): New macro.
diff --git a/gpgme/data-user.c b/gpgme/data-user.c
index 8a71b885..cfd31052 100644
--- a/gpgme/data-user.c
+++ b/gpgme/data-user.c
@@ -30,6 +30,9 @@
 static ssize_t
 user_read (gpgme_data_t dh, void *buffer, size_t size)
 {
+  if (!dh->data.user.cbs->read)
+    return EBADF;
+
   return (*dh->data.user.cbs->read) (dh->data.user.handle, buffer, size);
 }
 
@@ -37,6 +40,9 @@ user_read (gpgme_data_t dh, void *buffer, size_t size)
 static ssize_t
 user_write (gpgme_data_t dh, const void *buffer, size_t size)
 {
+  if (!dh->data.user.cbs->write)
+    return EBADF;
+
   return (*dh->data.user.cbs->write) (dh->data.user.handle, buffer, size);
 }
 
@@ -44,6 +50,9 @@ user_write (gpgme_data_t dh, const void *buffer, size_t size)
 static off_t
 user_seek (gpgme_data_t dh, off_t offset, int whence)
 {
+  if (!dh->data.user.cbs->seek)
+    return EBADF;
+
   return (*dh->data.user.cbs->seek) (dh->data.user.handle, offset, whence);
 }
 
@@ -51,7 +60,8 @@ user_seek (gpgme_data_t dh, off_t offset, int whence)
 static void
 user_release (gpgme_data_t dh)
 {
-  (*dh->data.user.cbs->release) (dh->data.user.handle);
+  if (dh->data.user.cbs->release)
+    (*dh->data.user.cbs->release) (dh->data.user.handle);
 }