qapi: add test-visitor, tests for gen. visitor code

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

Makefile

@@ -162,6 +162,20 @@ check-qlist: check-qlist.o qlist.o qint.o $(CHECK_PROG_DEPS)
 check-qfloat: check-qfloat.o qfloat.o $(CHECK_PROG_DEPS)
 check-qjson: check-qjson.o qfloat.o qint.o qdict.o qstring.o qlist.o qbool.o qjson.o json-streamer.o json-lexer.o json-parser.o error.o qerror.o qemu-error.o $(CHECK_PROG_DEPS)
 
+$(qapi-obj-y): $(GENERATED_HEADERS)
+qapi-dir := qapi-generated
+test-visitor.o: QEMU_CFLAGS += -I $(qapi-dir)
+
+$(qapi-dir)/test-qapi-types.c: $(qapi-dir)/test-qapi-types.h
+$(qapi-dir)/test-qapi-types.h: $(SRC_PATH)/qapi-schema-test.json $(SRC_PATH)/scripts/qapi-types.py
+	$(call quiet-command,python $(SRC_PATH)/scripts/qapi-types.py -o "$(qapi-dir)" -p "test-" < $<, "  GEN   $@")
+$(qapi-dir)/test-qapi-visit.c: $(qapi-dir)/test-qapi-visit.h
+$(qapi-dir)/test-qapi-visit.h: $(SRC_PATH)/qapi-schema-test.json $(SRC_PATH)/scripts/qapi-visit.py
+	$(call quiet-command,python $(SRC_PATH)/scripts/qapi-visit.py -o "$(qapi-dir)" -p "test-" < $<, "  GEN   $@")
+
+test-visitor.o: $(addprefix $(qapi-dir)/, test-qapi-types.c test-qapi-types.h test-qapi-visit.c test-qapi-visit.h) $(qapi-obj-y)
+test-visitor: test-visitor.o qfloat.o qint.o qdict.o qstring.o qlist.o qbool.o $(qapi-obj-y) error.o osdep.o qemu-malloc.o $(oslib-obj-y) qjson.o json-streamer.o json-lexer.o json-parser.o qerror.o qemu-error.o qemu-tool.o $(qapi-dir)/test-qapi-visit.o $(qapi-dir)/test-qapi-types.o
+
 QEMULIBS=libhw32 libhw64 libuser libdis libdis-user
 
 clean:
@@ -170,11 +184,12 @@ clean:
 	rm -f qemu-options.def
 	rm -f *.o *.d *.a *.lo $(TOOLS) TAGS cscope.* *.pod *~ */*~
 	rm -Rf .libs
-	rm -f slirp/*.o slirp/*.d audio/*.o audio/*.d block/*.o block/*.d net/*.o net/*.d fsdev/*.o fsdev/*.d ui/*.o ui/*.d
+	rm -f slirp/*.o slirp/*.d audio/*.o audio/*.d block/*.o block/*.d net/*.o net/*.d fsdev/*.o fsdev/*.d ui/*.o ui/*.d qapi/*.o qapi/*.d
 	rm -f qemu-img-cmds.h
 	rm -f trace.c trace.h trace.c-timestamp trace.h-timestamp
 	rm -f trace-dtrace.dtrace trace-dtrace.dtrace-timestamp
 	rm -f trace-dtrace.h trace-dtrace.h-timestamp
+	rm -rf $(qapi-dir)
 	$(MAKE) -C tests clean
 	for d in $(ALL_SUBDIRS) $(QEMULIBS) libcacard; do \
 	if test -d $$d; then $(MAKE) -C $$d $@ || exit 1; fi; \
@@ -363,4 +378,4 @@ tarbin:
 	$(mandir)/man8/qemu-nbd.8
 
 # Include automatically generated dependency files
--include $(wildcard *.d audio/*.d slirp/*.d block/*.d net/*.d ui/*.d)
+-include $(wildcard *.d audio/*.d slirp/*.d block/*.d net/*.d ui/*.d qapi/*.d)

test-visitor.c

+#include <glib.h>
+#include "qapi/qmp-output-visitor.h"
+#include "qapi/qmp-input-visitor.h"
+#include "test-qapi-types.h"
+#include "test-qapi-visit.h"
+#include "qemu-objects.h"
+
+typedef struct TestStruct
+{
+    int64_t x;
+    int64_t y;
+} TestStruct;
+
+typedef struct TestStructList
+{
+    TestStruct *value;
+    struct TestStructList *next;
+} TestStructList;
+
+static void visit_type_TestStruct(Visitor *v, TestStruct **obj, const char *name, Error **errp)
+{
+    visit_start_struct(v, (void **)obj, "TestStruct", name, sizeof(TestStruct), errp);
+    visit_type_int(v, &(*obj)->x, "x", errp);
+    visit_type_int(v, &(*obj)->y, "y", errp);
+    visit_end_struct(v, errp);
+}
+
+static void visit_type_TestStructList(Visitor *m, TestStructList ** obj, const char *name, Error **errp)
+{
+    GenericList *i;
+
+    visit_start_list(m, name, errp);
+
+    for (i = visit_next_list(m, (GenericList **)obj, errp); i; i = visit_next_list(m, &i, errp)) {
+        TestStructList *native_i = (TestStructList *)i;
+        visit_type_TestStruct(m, &native_i->value, NULL, errp);
+    }
+
+    visit_end_list(m, errp);
+}
+
+/* test core visitor methods */
+static void test_visitor_core(void)
+{
+    QmpOutputVisitor *mo;
+    QmpInputVisitor *mi;
+    Visitor *v;
+    TestStruct ts = { 42, 82 };
+    TestStruct *pts = &ts;
+    TestStructList *lts = NULL;
+    Error *err = NULL;
+    QObject *obj;
+    QString *str;
+    int64_t value = 0;
+
+    mo = qmp_output_visitor_new();
+    v = qmp_output_get_visitor(mo);
+
+    visit_type_TestStruct(v, &pts, NULL, &err);
+
+    obj = qmp_output_get_qobject(mo);
+
+    str = qobject_to_json(obj);
+
+    printf("%s\n", qstring_get_str(str));
+
+    QDECREF(str);
+
+    obj = QOBJECT(qint_from_int(0x42));
+
+    mi = qmp_input_visitor_new(obj);
+    v = qmp_input_get_visitor(mi);
+
+    visit_type_int(v, &value, NULL, &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+
+    g_assert(value == 0x42);
+
+    qobject_decref(obj);
+
+    obj = qobject_from_json("{'x': 42, 'y': 84}");
+    mi = qmp_input_visitor_new(obj);
+    v = qmp_input_get_visitor(mi);
+
+    pts = NULL;
+
+    visit_type_TestStruct(v, &pts, NULL, &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+
+    g_assert(pts != NULL);
+    g_assert(pts->x == 42);
+    g_assert(pts->y == 84);
+
+    qobject_decref(obj);
+
+    obj = qobject_from_json("[{'x': 42, 'y': 84}, {'x': 12, 'y': 24}]");
+    mi = qmp_input_visitor_new(obj);
+    v = qmp_input_get_visitor(mi);
+
+    visit_type_TestStructList(v, &lts, NULL, &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+
+    g_assert(lts != NULL);
+    g_assert(lts->value->x == 42);
+    g_assert(lts->value->y == 84);
+
+    lts = lts->next;
+    g_assert(lts != NULL);
+    g_assert(lts->value->x == 12);
+    g_assert(lts->value->y == 24);
+
+    g_assert(lts->next == NULL);
+
+    qobject_decref(obj);
+}
+
+/* test deep nesting with refs to other user-defined types */
+static void test_nested_structs(void)
+{
+    QmpOutputVisitor *mo;
+    QmpInputVisitor *mi;
+    Visitor *v;
+    UserDefOne ud1;
+    UserDefOne *ud1_p = &ud1, *ud1c_p = NULL;
+    UserDefTwo ud2;
+    UserDefTwo *ud2_p = &ud2, *ud2c_p = NULL;
+    Error *err = NULL;
+    QObject *obj;
+    QString *str;
+
+    ud1.integer = 42;
+    ud1.string = strdup("fourty two");
+
+    /* sanity check */
+    mo = qmp_output_visitor_new();
+    v = qmp_output_get_visitor(mo);
+    visit_type_UserDefOne(v, &ud1_p, "o_O", &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+    obj = qmp_output_get_qobject(mo);
+    g_assert(obj);
+    qobject_decref(obj);
+
+    ud2.string = strdup("fourty three");
+    ud2.dict.string = strdup("fourty four");
+    ud2.dict.dict.userdef = ud1_p;
+    ud2.dict.dict.string = strdup("fourty five");
+    ud2.dict.has_dict2 = true;
+    ud2.dict.dict2.userdef = ud1_p;
+    ud2.dict.dict2.string = strdup("fourty six");
+
+    /* c type -> qobject */
+    mo = qmp_output_visitor_new();
+    v = qmp_output_get_visitor(mo);
+    visit_type_UserDefTwo(v, &ud2_p, "unused", &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+    obj = qmp_output_get_qobject(mo);
+    g_assert(obj);
+    str = qobject_to_json_pretty(obj);
+    g_print("%s\n", qstring_get_str(str));
+    QDECREF(str);
+
+    /* qobject -> c type, should match original struct */
+    mi = qmp_input_visitor_new(obj);
+    v = qmp_input_get_visitor(mi);
+    visit_type_UserDefTwo(v, &ud2c_p, NULL, &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+
+    g_assert(!g_strcmp0(ud2c_p->string, ud2.string));
+    g_assert(!g_strcmp0(ud2c_p->dict.string, ud2.dict.string));
+
+    ud1c_p = ud2c_p->dict.dict.userdef;
+    g_assert(ud1c_p->integer == ud1_p->integer);
+    g_assert(!g_strcmp0(ud1c_p->string, ud1_p->string));
+
+    g_assert(!g_strcmp0(ud2c_p->dict.dict.string, ud2.dict.dict.string));
+
+    ud1c_p = ud2c_p->dict.dict2.userdef;
+    g_assert(ud1c_p->integer == ud1_p->integer);
+    g_assert(!g_strcmp0(ud1c_p->string, ud1_p->string));
+
+    g_assert(!g_strcmp0(ud2c_p->dict.dict2.string, ud2.dict.dict2.string));
+    qemu_free(ud1.string);
+    qemu_free(ud2.string);
+    qemu_free(ud2.dict.string);
+    qemu_free(ud2.dict.dict.string);
+    qemu_free(ud2.dict.dict2.string);
+
+    qapi_free_UserDefTwo(ud2c_p);
+
+    qobject_decref(obj);
+}
+
+/* test enum values */
+static void test_enums(void)
+{
+    QmpOutputVisitor *mo;
+    QmpInputVisitor *mi;
+    Visitor *v;
+    EnumOne enum1 = ENUM_ONE_VALUE2, enum1_cpy = ENUM_ONE_VALUE1;
+    Error *err = NULL;
+    QObject *obj;
+    QString *str;
+
+    /* C type -> QObject */
+    mo = qmp_output_visitor_new();
+    v = qmp_output_get_visitor(mo);
+    visit_type_EnumOne(v, &enum1, "unused", &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+    obj = qmp_output_get_qobject(mo);
+    g_assert(obj);
+    str = qobject_to_json_pretty(obj);
+    g_print("%s\n", qstring_get_str(str));
+    QDECREF(str);
+    g_assert(g_strcmp0(qstring_get_str(qobject_to_qstring(obj)), "value2") == 0);
+
+    /* QObject -> C type */
+    mi = qmp_input_visitor_new(obj);
+    v = qmp_input_get_visitor(mi);
+    visit_type_EnumOne(v, &enum1_cpy, "unused", &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+    g_debug("enum1_cpy, enum1: %d, %d", enum1_cpy, enum1);
+    g_assert(enum1_cpy == enum1);
+
+    qobject_decref(obj);
+}
+
+/* test enum values nested in schema-defined structs */
+static void test_nested_enums(void)
+{
+    QmpOutputVisitor *mo;
+    QmpInputVisitor *mi;
+    Visitor *v;
+    NestedEnumsOne *nested_enums, *nested_enums_cpy = NULL;
+    Error *err = NULL;
+    QObject *obj;
+    QString *str;
+
+    nested_enums = qemu_mallocz(sizeof(NestedEnumsOne));
+    nested_enums->enum1 = ENUM_ONE_VALUE1;
+    nested_enums->enum2 = ENUM_ONE_VALUE2;
+    nested_enums->enum3 = ENUM_ONE_VALUE3;
+    nested_enums->enum4 = ENUM_ONE_VALUE3;
+    nested_enums->has_enum2 = false;
+    nested_enums->has_enum4 = true;
+
+    /* C type -> QObject */
+    mo = qmp_output_visitor_new();
+    v = qmp_output_get_visitor(mo);
+    visit_type_NestedEnumsOne(v, &nested_enums, NULL, &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+    obj = qmp_output_get_qobject(mo);
+    g_assert(obj);
+    str = qobject_to_json_pretty(obj);
+    g_print("%s\n", qstring_get_str(str));
+    QDECREF(str);
+
+    /* QObject -> C type */
+    mi = qmp_input_visitor_new(obj);
+    v = qmp_input_get_visitor(mi);
+    visit_type_NestedEnumsOne(v, &nested_enums_cpy, NULL, &err);
+    if (err) {
+        g_error("%s", error_get_pretty(err));
+    }
+    g_assert(nested_enums_cpy);
+    g_assert(nested_enums_cpy->enum1 == nested_enums->enum1);
+    g_assert(nested_enums_cpy->enum3 == nested_enums->enum3);
+    g_assert(nested_enums_cpy->enum4 == nested_enums->enum4);
+    g_assert(nested_enums_cpy->has_enum2 == false);
+    g_assert(nested_enums_cpy->has_enum4 == true);
+
+    qobject_decref(obj);
+    qapi_free_NestedEnumsOne(nested_enums);
+    qapi_free_NestedEnumsOne(nested_enums_cpy);
+}
+
+int main(int argc, char **argv)
+{
+    g_test_init(&argc, &argv, NULL);
+
+    g_test_add_func("/0.15/visitor_core", test_visitor_core);
+    g_test_add_func("/0.15/nested_structs", test_nested_structs);
+    g_test_add_func("/0.15/enums", test_enums);
+    g_test_add_func("/0.15/nested_enums", test_nested_enums);
+
+    g_test_run();
+
+    return 0;
+}