1 files changed, 115 insertions, 0 deletions
diff --git a/util/error.c b/util/error.c
new file mode 100644
index 0000000000..519f6b6ce0
--- /dev/null
+++ b/util/error.c
@@ -0,0 +1,115 @@
+/*
+ * QEMU Error Objects
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.  See
+ * the COPYING.LIB file in the top-level directory.
+ */
+
+#include "qemu-common.h"
+#include "qapi/error.h"
+#include "qapi/qmp/qjson.h"
+#include "qapi/qmp/qdict.h"
+#include "qapi-types.h"
+#include "qapi/qmp/qerror.h"
+
+struct Error
+{
+    char *msg;
+    ErrorClass err_class;
+};
+
+void error_set(Error **errp, ErrorClass err_class, const char *fmt, ...)
+{
+    Error *err;
+    va_list ap;
+
+    if (errp == NULL) {
+        return;
+    }
+    assert(*errp == NULL);
+
+    err = g_malloc0(sizeof(*err));
+
+    va_start(ap, fmt);
+    err->msg = g_strdup_vprintf(fmt, ap);
+    va_end(ap);
+    err->err_class = err_class;
+
+    *errp = err;
+}
+
+void error_set_errno(Error **errp, int os_errno, ErrorClass err_class,
+                     const char *fmt, ...)
+{
+    Error *err;
+    char *msg1;
+    va_list ap;
+
+    if (errp == NULL) {
+        return;
+    }
+    assert(*errp == NULL);
+
+    err = g_malloc0(sizeof(*err));
+
+    va_start(ap, fmt);
+    msg1 = g_strdup_vprintf(fmt, ap);
+    if (os_errno != 0) {
+        err->msg = g_strdup_printf("%s: %s", msg1, strerror(os_errno));
+        g_free(msg1);
+    } else {
+        err->msg = msg1;
+    }
+    va_end(ap);
+    err->err_class = err_class;
+
+    *errp = err;
+}
+
+Error *error_copy(const Error *err)
+{
+    Error *err_new;
+
+    err_new = g_malloc0(sizeof(*err));
+    err_new->msg = g_strdup(err->msg);
+    err_new->err_class = err->err_class;
+
+    return err_new;
+}
+
+bool error_is_set(Error **errp)
+{
+    return (errp && *errp);
+}
+
+ErrorClass error_get_class(const Error *err)
+{
+    return err->err_class;
+}
+
+const char *error_get_pretty(Error *err)
+{
+    return err->msg;
+}
+
+void error_free(Error *err)
+{
+    if (err) {
+        g_free(err->msg);
+        g_free(err);
+    }
+}
+
+void error_propagate(Error **dst_err, Error *local_err)
+{
+    if (dst_err && !*dst_err) {
+        *dst_err = local_err;
+    } else if (local_err) {
+        error_free(local_err);
+    }
+}