[gnunet] branch master updated: add function to compute channel name for notifications

[gnunet]

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grothoff pushed a commit to branch master
in repository gnunet.

The following commit(s) were added to refs/heads/master by this push:
     new 28a4f4e5d add function to compute channel name for notifications
     new 21371c2e8 Merge branch 'master' of git+ssh://git.gnunet.org/gnunet
28a4f4e5d is described below

commit 28a4f4e5d78df67ccae80e1cf21a69227bf48f96
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Wed Nov 23 13:10:07 2022 +0100

    add function to compute channel name for notifications
---
 src/include/gnunet_pq_lib.h | 11 +++++++++++
 src/pq/pq_event.c           | 15 +++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/src/include/gnunet_pq_lib.h b/src/include/gnunet_pq_lib.h
index 4ea286b9f..550ba5eee 100644
--- a/src/include/gnunet_pq_lib.h
+++ b/src/include/gnunet_pq_lib.h
@@ -1139,6 +1139,17 @@ GNUNET_PQ_event_notify (struct GNUNET_PQ_Context *db,
                         size_t extra_size);
 
 
+/**
+ * Compute the channel that one should notify upon
+ * for the given event specification.
+ *
+ * @param es event specification
+ * @return channel to notify upon
+ */
+char *
+GNUNET_PG_get_event_notify_channel (const struct GNUNET_DB_EventHeaderP *es);
+
+
 /**
  * Within the @a db context, run all the SQL files
  * from the @a load_path from 0000-9999.sql (as long
diff --git a/src/pq/pq_event.c b/src/pq/pq_event.c
index 0e56c8b70..d1d34422b 100644
--- a/src/pq/pq_event.c
+++ b/src/pq/pq_event.c
@@ -512,6 +512,21 @@ GNUNET_PQ_event_listen_cancel (struct 
GNUNET_DB_EventHandler *eh)
 }
 
 
+char *
+GNUNET_PG_get_event_notify_channel (const struct GNUNET_DB_EventHeaderP *es)
+{
+  char sql[16 + 64 + extra_size * 8 / 5 + 8];
+  char *end;
+
+  end = stpcpy (sql,
+                "NOTIFY X");
+  end = es_to_channel (es,
+                       end);
+  GNUNET_assert (NULL != end);
+  return GNUNET_strdup (sql);
+}
+
+
 void
 GNUNET_PQ_event_notify (struct GNUNET_PQ_Context *db,
                         const struct GNUNET_DB_EventHeaderP *es,

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