[balsa/gtk3] Implement gboolean libbalsa_conf_has_key()

[Peter Bloomfield <PeterB src gnome org>]

commit 8345c8175bed39d9e162dd837179b3351c37c76e
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Thu Mar 14 12:28:53 2013 -0400

    Implement gboolean libbalsa_conf_has_key()
    
        * libbalsa/libbalsa-conf.c (libbalsa_conf_has_key): new
        function.
        * libbalsa/libbalsa-conf.h: ditto.

 ChangeLog                |    6 ++++++
 libbalsa/libbalsa-conf.c |   10 ++++++++++
 libbalsa/libbalsa-conf.h |    1 +
 3 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 76c688d..9fa09c9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-03-14  Peter Bloomfield
+
+       * libbalsa/libbalsa-conf.c (libbalsa_conf_has_key): new
+       function.
+       * libbalsa/libbalsa-conf.h: ditto.
+
 2013-03-11  Peter Bloomfield
 
        Lock mailbox to avoid race
diff --git a/libbalsa/libbalsa-conf.c b/libbalsa/libbalsa-conf.c
index c7c1f8c..7fbf0ac 100644
--- a/libbalsa/libbalsa-conf.c
+++ b/libbalsa/libbalsa-conf.c
@@ -269,6 +269,16 @@ libbalsa_conf_has_group(const char *group)
             g_key_file_has_group(lbc_conf_priv.key_file, group));
 }
 
+gboolean
+libbalsa_conf_has_key(const gchar * key)
+{
+    /* g_key_file_has_key returns FALSE on error, but that is OK */
+    return (g_key_file_has_key(lbc_conf.key_file, lbc_groups->data,
+                               key, NULL) ||
+            g_key_file_has_key(lbc_conf_priv.key_file, lbc_groups->data,
+                                  key, NULL));
+}
+
 static void
 lbc_remove_key(LibBalsaConf * conf, const char *key)
 {
diff --git a/libbalsa/libbalsa-conf.h b/libbalsa/libbalsa-conf.h
index 406a995..99521ac 100644
--- a/libbalsa/libbalsa-conf.h
+++ b/libbalsa/libbalsa-conf.h
@@ -33,6 +33,7 @@ void libbalsa_conf_remove_group_(const char *group, gboolean priv);
         (libbalsa_conf_remove_group_((group),TRUE))
 
 gboolean libbalsa_conf_has_group(const char *group);
+gboolean libbalsa_conf_has_key(const gchar *key);
 
 /* Wrapper for iterating over groups. */
 typedef gboolean (*LibBalsaConfForeachFunc)(const gchar * key,