guile: use updated Query API

guile/mu-guile.hh

@@ -0,0 +1,87 @@
+/*
+** Copyright (C) 2011-2020 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+**
+** This program is free software; you can redistribute it and/or modify it
+** under the terms of the GNU General Public License as published by the
+** Free Software Foundation; either version 3, or (at your option) any
+** later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software Foundation,
+** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+**
+*/
+
+#ifndef __MU_GUILE_H__
+#define __MU_GUILE_H__
+
+#include <glib.h>
+#include <libguile.h>
+#include <mu-query.hh>
+
+
+/**
+ * get the singleton Query instance
+ */
+Mu::Query& mu_guile_query (void);
+
+
+/**
+ * whether mu-guile is initialized
+ *
+ * @return TRUE if MuGuile is Initialized, FALSE otherwise
+ */
+gboolean mu_guile_initialized ();
+
+
+/**
+ * raise a guile error (based on a GError)
+ *
+ * @param func_name function name
+ * @param err the error
+ *
+ * @return SCM_UNSPECIFIED
+ */
+SCM mu_guile_g_error (const char *func_name, GError *err);
+
+
+/**
+ * raise a guile error
+ *
+ * @param func_name function
+ * @param status err code
+ * @param fmt format string for error msg
+ * @param args params for format string
+ *
+ * @return SCM_UNSPECIFIED
+ */
+SCM mu_guile_error   (const char *func_name, int status,
+		      const char *fmt, SCM args);
+
+
+/**
+ * convert a const char* into an SCM -- either a string or, if str ==
+ * NULL, #f. It assumes str is in UTF8 encoding, and replace
+ * characters with '?' if needed.
+ *
+ * @param str a string or NULL
+ *
+ * @return a guile string or #f
+ */
+SCM mu_guile_scm_from_str (const char *str);
+
+/**
+ * Initialize this mu guile module.
+ *
+ * @param data
+ *
+ * @return
+ */
+void* mu_guile_init (void *data);
+
+#endif /*__MU_GUILE_H__*/