Import nbdkit-1.22.0

utils.go

@@ -0,0 +1,75 @@
+/* cgo wrappers.
+ * Copyright (C) 2013-2020 Red Hat Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of Red Hat nor the names of its contributors may be
+ * used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+package nbdkit
+
+/*
+#cgo pkg-config: nbdkit
+
+#define NBDKIT_API_VERSION 2
+#include <nbdkit-plugin.h>
+
+// cgo cannot call varargs functions.
+void
+_nbdkit_debug (const char *s)
+{
+  nbdkit_debug ("%s", s);
+}
+
+// cgo cannot call varargs functions.
+void
+_nbdkit_error (const char *s)
+{
+  nbdkit_error ("%s", s);
+}
+*/
+import "C"
+import "syscall"
+
+// Utility functions.
+
+func Debug(s string) {
+	C._nbdkit_debug(C.CString(s))
+}
+
+// This function is provided but plugins would rarely need to call
+// this explicitly since returning an error from a plugin callback
+// will call it implicitly.
+func Error(s string) {
+	C._nbdkit_error(C.CString(s))
+}
+
+// Same applies as for Error().  Callers should not usually need to
+// call this.
+func SetError(err syscall.Errno) {
+	C.nbdkit_set_error(C.int(err))
+}