qapi: add QAPI visitor core

Base definitions/includes for Visiter interface used by generated
visiter/marshalling code.

Includes a GenericList type. Our lists require an embedded element.
Since these types are generated, if you want to use them in a different
type of data structure, there's no easy way to add another embedded
element. The solution is to have non-embedded lists and that what this is.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>

Makefile.objs

@@ -372,6 +372,12 @@ endif
 
 libcacard-y = cac.o event.o vcard.o vreader.o vcard_emul_nss.o vcard_emul_type.o card_7816.o
 
+######################################################################
+# qapi
+
+qapi-nested-y = qapi-visit-core.o
+qapi-obj-y = $(addprefix qapi/, $(qapi-nested-y))
+
 vl.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
 
 vl.o: QEMU_CFLAGS+=$(SDL_CFLAGS)

configure

@@ -3486,6 +3486,7 @@ DIRS="tests tests/cris slirp audio block net pc-bios/optionrom"
 DIRS="$DIRS pc-bios/spapr-rtas"
 DIRS="$DIRS roms/seabios roms/vgabios"
 DIRS="$DIRS fsdev ui"
+DIRS="$DIRS qapi"
 FILES="Makefile tests/Makefile"
 FILES="$FILES tests/cris/Makefile tests/cris/.gdbinit"
 FILES="$FILES pc-bios/optionrom/Makefile pc-bios/keymaps"

qapi/qapi-types-core.h

@@ -0,0 +1,20 @@
+/*
+ * Core Definitions for QAPI-generated Types
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#ifndef QAPI_TYPES_CORE_H
+#define QAPI_TYPES_CORE_H
+
+#include "qemu-common.h"
+#include "error.h"
+
+#endif

qapi/qapi-visit-core.c

@@ -0,0 +1,118 @@
+/*
+ * Core Definitions for QAPI Visitor Classes
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#include "qapi/qapi-visit-core.h"
+
+void visit_start_handle(Visitor *v, void **obj, const char *kind,
+                        const char *name, Error **errp)
+{
+    if (!error_is_set(errp) && v->start_handle) {
+        v->start_handle(v, obj, kind, name, errp);
+    }
+}
+
+void visit_end_handle(Visitor *v, Error **errp)
+{
+    if (!error_is_set(errp) && v->end_handle) {
+        v->end_handle(v, errp);
+    }
+}
+
+void visit_start_struct(Visitor *v, void **obj, const char *kind,
+                        const char *name, size_t size, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        v->start_struct(v, obj, kind, name, size, errp);
+    }
+}
+
+void visit_end_struct(Visitor *v, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        v->end_struct(v, errp);
+    }
+}
+
+void visit_start_list(Visitor *v, const char *name, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        v->start_list(v, name, errp);
+    }
+}
+
+GenericList *visit_next_list(Visitor *v, GenericList **list, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        return v->next_list(v, list, errp);
+    }
+
+    return 0;
+}
+
+void visit_end_list(Visitor *v, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        v->end_list(v, errp);
+    }
+}
+
+void visit_start_optional(Visitor *v, bool *present, const char *name,
+                          Error **errp)
+{
+    if (!error_is_set(errp) && v->start_optional) {
+        v->start_optional(v, present, name, errp);
+    }
+}
+
+void visit_end_optional(Visitor *v, Error **errp)
+{
+    if (!error_is_set(errp) && v->end_optional) {
+        v->end_optional(v, errp);
+    }
+}
+
+void visit_type_enum(Visitor *v, int *obj, const char *strings[],
+                     const char *kind, const char *name, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        v->type_enum(v, obj, strings, kind, name, errp);
+    }
+}
+
+void visit_type_int(Visitor *v, int64_t *obj, const char *name, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        v->type_int(v, obj, name, errp);
+    }
+}
+
+void visit_type_bool(Visitor *v, bool *obj, const char *name, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        v->type_bool(v, obj, name, errp);
+    }
+}
+
+void visit_type_str(Visitor *v, char **obj, const char *name, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        v->type_str(v, obj, name, errp);
+    }
+}
+
+void visit_type_number(Visitor *v, double *obj, const char *name, Error **errp)
+{
+    if (!error_is_set(errp)) {
+        v->type_number(v, obj, name, errp);
+    }
+}

qapi/qapi-visit-core.h

@@ -0,0 +1,76 @@
+/*
+ * Core Definitions for QAPI Visitor Classes
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+#ifndef QAPI_VISITOR_CORE_H
+#define QAPI_VISITOR_CORE_H
+
+#include "qapi/qapi-types-core.h"
+#include <stdlib.h>
+
+typedef struct GenericList
+{
+    void *value;
+    struct GenericList *next;
+} GenericList;
+
+typedef struct Visitor Visitor;
+
+struct Visitor
+{
+    /* Must be set */
+    void (*start_struct)(Visitor *v, void **obj, const char *kind,
+                         const char *name, size_t size, Error **errp);
+    void (*end_struct)(Visitor *v, Error **errp);
+
+    void (*start_list)(Visitor *v, const char *name, Error **errp);
+    GenericList *(*next_list)(Visitor *v, GenericList **list, Error **errp);
+    void (*end_list)(Visitor *v, Error **errp);
+
+    void (*type_enum)(Visitor *v, int *obj, const char *strings[],
+                      const char *kind, const char *name, Error **errp);
+
+    void (*type_int)(Visitor *v, int64_t *obj, const char *name, Error **errp);
+    void (*type_bool)(Visitor *v, bool *obj, const char *name, Error **errp);
+    void (*type_str)(Visitor *v, char **obj, const char *name, Error **errp);
+    void (*type_number)(Visitor *v, double *obj, const char *name,
+                        Error **errp);
+
+    /* May be NULL */
+    void (*start_optional)(Visitor *v, bool *present, const char *name,
+                           Error **errp);
+    void (*end_optional)(Visitor *v, Error **errp);
+
+    void (*start_handle)(Visitor *v, void **obj, const char *kind,
+                         const char *name, Error **errp);
+    void (*end_handle)(Visitor *v, Error **errp);
+};
+
+void visit_start_handle(Visitor *v, void **obj, const char *kind,
+                        const char *name, Error **errp);
+void visit_end_handle(Visitor *v, Error **errp);
+void visit_start_struct(Visitor *v, void **obj, const char *kind,
+                        const char *name, size_t size, Error **errp);
+void visit_end_struct(Visitor *v, Error **errp);
+void visit_start_list(Visitor *v, const char *name, Error **errp);
+GenericList *visit_next_list(Visitor *v, GenericList **list, Error **errp);
+void visit_end_list(Visitor *v, Error **errp);
+void visit_start_optional(Visitor *v, bool *present, const char *name,
+                          Error **errp);
+void visit_end_optional(Visitor *v, Error **errp);
+void visit_type_enum(Visitor *v, int *obj, const char *strings[],
+                     const char *kind, const char *name, Error **errp);
+void visit_type_int(Visitor *v, int64_t *obj, const char *name, Error **errp);
+void visit_type_bool(Visitor *v, bool *obj, const char *name, Error **errp);
+void visit_type_str(Visitor *v, char **obj, const char *name, Error **errp);
+void visit_type_number(Visitor *v, double *obj, const char *name, Error **errp);
+
+#endif