[Qemu-devel] [PATCH 0/8] qapi: add support for lists of native types

[Qemu-devel] [PATCH 0/8] qapi: add support for lists of native types

[Michael Roth]

These patches apply on top of qemu.git master, and can also be obtained from:
git://github.com/mdroth/qemu.git qapi-native-lists

Sending this now since a number of series have popped up in the past that
wanted this, and Amos has some pending patches (query-mac-tables) that rely
on this as well.

These patches add support for specifying lists of native qapi types
(int/bool/str/number) like so:

  { 'type': 'foo',
    'data': { 'bar': ['int'] }}

for a 'bar' field that is a list of type 'int',

  { 'type': 'foo2',
    'data': { 'bar2': ['str'] }}

for a 'bar2' field that is a list of type 'str', and so on.

This uses linked list types for the native C representations, just as we do
for complex schema-defined types. In the future we may add schema annotations
of some sort to specify a more natural/efficient array type for the C
representations, but this should serve the majority of uses-cases for now.

 Makefile                           |    6 +-
 qapi-schema-test.json              |    8 ++
 scripts/qapi-types.py              |   44 ++++++-
 scripts/qapi-visit.py              |   36 ++++-
 scripts/qapi.py                    |   21 +++
 tests/test-qmp-input-visitor.c     |  181 +++++++++++++++++++++++++
 tests/test-qmp-output-visitor.c    |  172 ++++++++++++++++++++++++
 tests/test-visitor-serialization.c |  256 +++++++++++++++++++++++++++++++++---
 8 files changed, 692 insertions(+), 32 deletions(-)

[Qemu-devel] [PATCH 1/8] qapi: qapi-types.py, native list support

[Michael Roth]

Teach type generators about native types so they can generate the
appropriate linked list types.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 scripts/qapi-types.py |   44 +++++++++++++++++++++++++++++++++++++++++---
 scripts/qapi.py       |   21 +++++++++++++++++++++
 2 files changed, 62 insertions(+), 3 deletions(-)

diff --git a/scripts/qapi-types.py b/scripts/qapi-types.py
index 9e19920..1fc5644 100644
--- a/scripts/qapi-types.py
+++ b/scripts/qapi-types.py
@@ -16,7 +16,18 @@ import os
 import getopt
 import errno
 
-def generate_fwd_struct(name, members):
+def generate_fwd_struct(name, members, builtin_type=False):
+    if builtin_type:
+        return mcgen('''
+typedef struct %(name)sList
+{
+    %(type)s value;
+    struct %(name)sList *next;
+} %(name)sList;
+''',
+                     type=c_type(name),
+                     name=name)
+
     return mcgen('''
 typedef struct %(name)s %(name)s;
 
@@ -28,6 +39,7 @@ typedef struct %(name)sList
 ''',
                  name=name)
 
+
 def generate_fwd_enum_struct(name, members):
     return mcgen('''
 typedef struct %(name)sList
@@ -164,6 +176,7 @@ void qapi_free_%(type)s(%(c_type)s obj);
 
 def generate_type_cleanup(name):
     ret = mcgen('''
+
 void qapi_free_%(type)s(%(c_type)s obj)
 {
     QapiDeallocVisitor *md;
@@ -184,8 +197,9 @@ void qapi_free_%(type)s(%(c_type)s obj)
 
 
 try:
-    opts, args = getopt.gnu_getopt(sys.argv[1:], "chp:o:",
-                                   ["source", "header", "prefix=", "output-dir="])
+    opts, args = getopt.gnu_getopt(sys.argv[1:], "chbp:o:",
+                                   ["source", "header", "builtins",
+                                    "prefix=", "output-dir="])
 except getopt.GetoptError, err:
     print str(err)
     sys.exit(1)
@@ -197,6 +211,7 @@ h_file = 'qapi-types.h'
 
 do_c = False
 do_h = False
+do_builtins = False
 
 for o, a in opts:
     if o in ("-p", "--prefix"):
@@ -207,6 +222,8 @@ for o, a in opts:
         do_c = True
     elif o in ("-h", "--header"):
         do_h = True
+    elif o in ("-b", "--builtins"):
+        do_builtins = True
 
 if not do_c and not do_h:
     do_c = True
@@ -282,6 +299,11 @@ fdecl.write(mcgen('''
 exprs = parse_schema(sys.stdin)
 exprs = filter(lambda expr: not expr.has_key('gen'), exprs)
 
+fdecl.write(guardstart("QAPI_TYPES_BUILTIN_STRUCT_DECL"))
+for typename in builtin_types:
+    fdecl.write(generate_fwd_struct(typename, None, builtin_type=True))
+fdecl.write(guardend("QAPI_TYPES_BUILTIN_STRUCT_DECL"))
+
 for expr in exprs:
     ret = "\n"
     if expr.has_key('type'):
@@ -298,6 +320,22 @@ for expr in exprs:
         continue
     fdecl.write(ret)
 
+# to avoid header dependency hell, we always generate declarations
+# for built-in types in our header files and simply guard them
+fdecl.write(guardstart("QAPI_TYPES_BUILTIN_CLEANUP_DECL"))
+for typename in builtin_types:
+    fdecl.write(generate_type_cleanup_decl(typename + "List"))
+fdecl.write(guardend("QAPI_TYPES_BUILTIN_CLEANUP_DECL"))
+
+# ...this doesn't work for cases where we link in multiple objects that
+# have the functions defined, so we use -b option to provide control
+# over these cases
+if do_builtins:
+    fdef.write(guardstart("QAPI_TYPES_BUILTIN_CLEANUP_DEF"))
+    for typename in builtin_types:
+        fdef.write(generate_type_cleanup(typename + "List"))
+    fdef.write(guardend("QAPI_TYPES_BUILTIN_CLEANUP_DEF"))
+
 for expr in exprs:
     ret = "\n"
     if expr.has_key('type'):
diff --git a/scripts/qapi.py b/scripts/qapi.py
index afc5f32..0ac8c2b 100644
--- a/scripts/qapi.py
+++ b/scripts/qapi.py
@@ -11,6 +11,10 @@
 
 from ordereddict import OrderedDict
 
+builtin_types = [
+    'str', 'int', 'number', 'bool'
+]
+
 def tokenize(data):
     while len(data):
         ch = data[0]
@@ -242,3 +246,20 @@ def guardname(filename):
     for substr in [".", " ", "-"]:
         guard = guard.replace(substr, "_")
     return guard.upper() + '_H'
+
+def guardstart(name):
+    return mcgen('''
+
+#ifndef %(name)s
+#define %(name)s
+
+''',
+                 name=guardname(name))
+
+def guardend(name):
+    return mcgen('''
+
+#endif /* %(name)s */
+
+''',
+                 name=guardname(name))
-- 
1.7.9.5

[Qemu-devel] [PATCH 2/8] qapi: qapi-visit.py, fix list handling for union types

[Michael Roth]

Currently we assume non-list types when generating visitor routines for
union types. This is broken, since values like ['Type'] need to mapped
to 'TypeList'.

We already have a type_name() function to handle this that we use for
generating struct visitors, so use that here as well.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 scripts/qapi-visit.py |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index a276540..4c4de4b 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -174,7 +174,7 @@ void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **
 ''',
                 abbrev = de_camel_case(name).upper(),
                 enum = c_fun(de_camel_case(key),False).upper(),
-                c_type=members[key],
+                c_type=type_name(members[key]),
                 c_name=c_fun(key))
 
     ret += mcgen('''
-- 
1.7.9.5

[Qemu-devel] [PATCH 3/8] qapi: qapi-visit.py, native list support

[Michael Roth]

Teach visitor generators about native types so they can generate the
appropriate visitor routines.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 scripts/qapi-visit.py |   34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index 4c4de4b..6cac05a 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -202,12 +202,14 @@ void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **
 
     return ret
 
-def generate_declaration(name, members, genlist=True):
-    ret = mcgen('''
+def generate_declaration(name, members, genlist=True, builtin_type=False):
+    ret = ""
+    if not builtin_type:
+        ret += mcgen('''
 
 void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **errp);
 ''',
-                name=name)
+                    name=name)
 
     if genlist:
         ret += mcgen('''
@@ -235,8 +237,9 @@ void visit_type_%(name)s(Visitor *m, %(name)s * obj, const char *name, Error **e
                 name=name)
 
 try:
-    opts, args = getopt.gnu_getopt(sys.argv[1:], "chp:o:",
-                                   ["source", "header", "prefix=", "output-dir="])
+    opts, args = getopt.gnu_getopt(sys.argv[1:], "chbp:o:",
+                                   ["source", "header", "builtins", "prefix=",
+                                    "output-dir="])
 except getopt.GetoptError, err:
     print str(err)
     sys.exit(1)
@@ -248,6 +251,7 @@ h_file = 'qapi-visit.h'
 
 do_c = False
 do_h = False
+do_builtins = False
 
 for o, a in opts:
     if o in ("-p", "--prefix"):
@@ -258,6 +262,8 @@ for o, a in opts:
         do_c = True
     elif o in ("-h", "--header"):
         do_h = True
+    elif o in ("-b", "--builtins"):
+        do_builtins = True
 
 if not do_c and not do_h:
     do_c = True
@@ -324,11 +330,29 @@ fdecl.write(mcgen('''
 
 #include "qapi/visitor.h"
 #include "%(prefix)sqapi-types.h"
+
 ''',
                   prefix=prefix, guard=guardname(h_file)))
 
 exprs = parse_schema(sys.stdin)
 
+# to avoid header dependency hell, we always generate declarations
+# for built-in types in our header files and simply guard them
+fdecl.write(guardstart("QAPI_VISIT_BUILTIN_VISITOR_DECL"))
+for typename in builtin_types:
+    fdecl.write(generate_declaration(typename, None, genlist=True,
+                                     builtin_type=True))
+fdecl.write(guardend("QAPI_VISIT_BUILTIN_VISITOR_DECL"))
+
+# ...this doesn't work for cases where we link in multiple objects that
+# have the functions defined, so we use -b option to provide control
+# over these cases
+if do_builtins:
+    fdef.write(guardstart("QAPI_VISIT_BUILTIN_VISITOR_DEF"))
+    for typename in builtin_types:
+        fdef.write(generate_visit_list(typename, None))
+    fdef.write(guardend("QAPI_VISIT_BUILTIN_VISITOR_DEF"))
+
 for expr in exprs:
     if expr.has_key('type'):
         ret = generate_visit_struct(expr['type'], expr['data'])
-- 
1.7.9.5

[Qemu-devel] [PATCH 4/8] qapi: enable generation of native list code

[Michael Roth]

Also, fix a dependency issue with libqemuutil: qemu-sockets.c needs
qapi-types.c/qapi-visit.c

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 Makefile |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 7dc0204..9695c9d 100644
--- a/Makefile
+++ b/Makefile
@@ -178,7 +178,7 @@ Makefile: $(version-obj-y) $(version-lobj-y)
 # Build libraries
 
 libqemustub.a: $(stub-obj-y)
-libqemuutil.a: $(util-obj-y)
+libqemuutil.a: $(util-obj-y) qapi-types.o qapi-visit.o
 
 ######################################################################
 
@@ -215,10 +215,10 @@ $(SRC_PATH)/qga/qapi-schema.json $(SRC_PATH)/scripts/qapi-commands.py $(qapi-py)
 
 qapi-types.c qapi-types.h :\
 $(SRC_PATH)/qapi-schema.json $(SRC_PATH)/scripts/qapi-types.py $(qapi-py)
-	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-types.py $(gen-out-type) -o "." < $<, "  GEN   $@")
+	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-types.py $(gen-out-type) -o "." -b < $<, "  GEN   $@")
 qapi-visit.c qapi-visit.h :\
 $(SRC_PATH)/qapi-schema.json $(SRC_PATH)/scripts/qapi-visit.py $(qapi-py)
-	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-visit.py $(gen-out-type) -o "."  < $<, "  GEN   $@")
+	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-visit.py $(gen-out-type) -o "." -b < $<, "  GEN   $@")
 qmp-commands.h qmp-marshal.c :\
 $(SRC_PATH)/qapi-schema.json $(SRC_PATH)/scripts/qapi-commands.py $(qapi-py)
 	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-commands.py $(gen-out-type) -m -o "." < $<, "  GEN   $@")
-- 
1.7.9.5

[Qemu-devel] [PATCH 5/8] qapi: fix leak in unit tests

[Michael Roth]

qmp_output_get_qobject() increments the qobject's reference count. Since
we currently pass this straight into qobject_to_json() so we can feed
the data into a QMP input visitor, we never actually free the underlying
qobject when qmp_output_visitor_cleanup() is called. This causes leaks
on all of the QMP serialization tests.

Fix this by holding a pointer to the qobject and decref'ing it before
returning from qmp_deserialize().

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 tests/test-visitor-serialization.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tests/test-visitor-serialization.c b/tests/test-visitor-serialization.c
index e84926f..8c8adac 100644
--- a/tests/test-visitor-serialization.c
+++ b/tests/test-visitor-serialization.c
@@ -657,11 +657,16 @@ static void qmp_deserialize(void **native_out, void *datap,
                             VisitorFunc visit, Error **errp)
 {
     QmpSerializeData *d = datap;
-    QString *output_json = qobject_to_json(qmp_output_get_qobject(d->qov));
-    QObject *obj = qobject_from_json(qstring_get_str(output_json));
+    QString *output_json;
+    QObject *obj_orig, *obj;
+
+    obj_orig = qmp_output_get_qobject(d->qov);
+    output_json = qobject_to_json(obj_orig);
+    obj = qobject_from_json(qstring_get_str(output_json));
 
     QDECREF(output_json);
     d->qiv = qmp_input_visitor_new(obj);
+    qobject_decref(obj_orig);
     qobject_decref(obj);
     visit(qmp_input_get_visitor(d->qiv), native_out, errp);
 }
-- 
1.7.9.5

[Qemu-devel] [PATCH 6/8] qapi: add native list coverage for visitor serialization tests

[Michael Roth]

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 tests/test-visitor-serialization.c |  247 +++++++++++++++++++++++++++++++++---
 1 file changed, 229 insertions(+), 18 deletions(-)

diff --git a/tests/test-visitor-serialization.c b/tests/test-visitor-serialization.c
index 8c8adac..b5e1a4b 100644
--- a/tests/test-visitor-serialization.c
+++ b/tests/test-visitor-serialization.c
@@ -23,6 +23,25 @@
 #include "qapi/qmp-output-visitor.h"
 #include "qapi/string-input-visitor.h"
 #include "qapi/string-output-visitor.h"
+#include "qapi-types.h"
+#include "qapi-visit.h"
+#include "qapi/dealloc-visitor.h"
+
+enum PrimitiveTypeKind {
+    PTYPE_STRING = 0,
+    PTYPE_BOOLEAN,
+    PTYPE_NUMBER,
+    PTYPE_INTEGER,
+    PTYPE_U8,
+    PTYPE_U16,
+    PTYPE_U32,
+    PTYPE_U64,
+    PTYPE_S8,
+    PTYPE_S16,
+    PTYPE_S32,
+    PTYPE_S64,
+    PTYPE_EOL,
+};
 
 typedef struct PrimitiveType {
     union {
@@ -40,26 +59,34 @@ typedef struct PrimitiveType {
         int64_t s64;
         intmax_t max;
     } value;
-    enum {
-        PTYPE_STRING = 0,
-        PTYPE_BOOLEAN,
-        PTYPE_NUMBER,
-        PTYPE_INTEGER,
-        PTYPE_U8,
-        PTYPE_U16,
-        PTYPE_U32,
-        PTYPE_U64,
-        PTYPE_S8,
-        PTYPE_S16,
-        PTYPE_S32,
-        PTYPE_S64,
-        PTYPE_EOL,
-    } type;
+    enum PrimitiveTypeKind type;
     const char *description;
 } PrimitiveType;
 
+typedef struct PrimitiveList {
+    union {
+        strList *strings;
+        boolList *booleans;
+        numberList *numbers;
+        intList *integers;
+    } value;
+    enum PrimitiveTypeKind type;
+    const char *description;
+} PrimitiveList;
+
 /* test helpers */
 
+typedef void (*VisitorFunc)(Visitor *v, void **native, Error **errp);
+
+static void dealloc_helper(void *native_in, VisitorFunc visit, Error **errp)
+{
+    QapiDeallocVisitor *qdv = qapi_dealloc_visitor_new();
+
+    visit(qapi_dealloc_get_visitor(qdv), &native_in, errp);
+
+    qapi_dealloc_visitor_cleanup(qdv);
+}
+
 static void visit_primitive_type(Visitor *v, void **native, Error **errp)
 {
     PrimitiveType *pt = *native;
@@ -105,6 +132,27 @@ static void visit_primitive_type(Visitor *v, void **native, Error **errp)
     }
 }
 
+static void visit_primitive_list(Visitor *v, void **native, Error **errp)
+{
+    PrimitiveList *pl = *native;
+    switch (pl->type) {
+    case PTYPE_STRING:
+        visit_type_strList(v, &pl->value.strings, NULL, errp);
+        break;
+    case PTYPE_BOOLEAN:
+        visit_type_boolList(v, &pl->value.booleans, NULL, errp);
+        break;
+    case PTYPE_NUMBER:
+        visit_type_numberList(v, &pl->value.numbers, NULL, errp);
+        break;
+    case PTYPE_INTEGER:
+        visit_type_intList(v, &pl->value.integers, NULL, errp);
+        break;
+    default:
+        g_assert(false);
+    }
+}
+
 typedef struct TestStruct
 {
     int64_t integer;
@@ -206,12 +254,11 @@ static void visit_nested_struct_list(Visitor *v, void **native, Error **errp)
 
 /* test cases */
 
-typedef void (*VisitorFunc)(Visitor *v, void **native, Error **errp);
-
 typedef enum VisitorCapabilities {
     VCAP_PRIMITIVES = 1,
     VCAP_STRUCTURES = 2,
     VCAP_LISTS = 4,
+    VCAP_PRIMITIVE_LISTS = 8,
 } VisitorCapabilities;
 
 typedef struct SerializeOps {
@@ -279,6 +326,151 @@ static void test_primitives(gconstpointer opaque)
     g_free(pt_copy);
 }
 
+static void test_primitive_lists(gconstpointer opaque)
+{
+    TestArgs *args = (TestArgs *) opaque;
+    const SerializeOps *ops = args->ops;
+    PrimitiveType *pt = args->test_data;
+    PrimitiveList pl = { .value = { 0 } };
+    PrimitiveList pl_copy = { .value = { 0 } };
+    PrimitiveList *pl_copy_ptr = &pl_copy;
+    Error *err = NULL;
+    void *serialize_data;
+    void *cur_head = NULL;
+    int i;
+
+    pl.type = pl_copy.type = pt->type;
+
+    /* build up our list of primitive types */
+    for (i = 0; i < 32; i++) {
+        switch (pl.type) {
+        case PTYPE_STRING: {
+            strList *tmp = g_new0(strList, 1);
+            tmp->value = g_strdup(pt->value.string);
+            if (pl.value.strings == NULL) {
+                pl.value.strings = tmp;
+            } else {
+                tmp->next = pl.value.strings;
+                pl.value.strings = tmp;
+            }
+            break;
+        }
+        case PTYPE_INTEGER: {
+            intList *tmp = g_new0(intList, 1);
+            tmp->value = pt->value.integer;
+            if (pl.value.integers == NULL) {
+                pl.value.integers = tmp;
+            } else {
+                tmp->next = pl.value.integers;
+                pl.value.integers = tmp;
+            }
+            break;
+        }
+        case PTYPE_NUMBER: {
+            numberList *tmp = g_new0(numberList, 1);
+            tmp->value = pt->value.number;
+            if (pl.value.numbers == NULL) {
+                pl.value.numbers = tmp;
+            } else {
+                tmp->next = pl.value.numbers;
+                pl.value.numbers = tmp;
+            }
+            break;
+        }
+        case PTYPE_BOOLEAN: {
+            boolList *tmp = g_new0(boolList, 1);
+            tmp->value = pt->value.boolean;
+            if (pl.value.booleans == NULL) {
+                pl.value.booleans = tmp;
+            } else {
+                tmp->next = pl.value.booleans;
+                pl.value.booleans = tmp;
+            }
+            break;
+        }
+        default:
+            g_assert(0);
+        }
+    }
+
+    ops->serialize((void **)&pl, &serialize_data, visit_primitive_list, &err);
+    ops->deserialize((void **)&pl_copy_ptr, serialize_data, visit_primitive_list, &err);
+
+    g_assert(err == NULL);
+    i = 0;
+
+    /* compare our deserialized list of primitives to the original */
+    do {
+        switch (pl_copy.type) {
+        case PTYPE_STRING: {
+            strList *ptr;
+            if (cur_head) {
+                ptr = cur_head;
+                cur_head = ptr->next;
+            } else {
+                cur_head = ptr = pl_copy.value.strings;
+            }
+            g_assert_cmpstr(pt->value.string, ==, ptr->value);
+            break;
+        }
+        case PTYPE_INTEGER: {
+            intList *ptr;
+            if (cur_head) {
+                ptr = cur_head;
+                cur_head = ptr->next;
+            } else {
+                cur_head = ptr = pl_copy.value.integers;
+            }
+            g_assert_cmpint(pt->value.integer, ==, ptr->value);
+            break;
+        }
+        case PTYPE_NUMBER: {
+            numberList *ptr;
+            char *double1, *double2;
+            if (cur_head) {
+                ptr = cur_head;
+                cur_head = ptr->next;
+            } else {
+                cur_head = ptr = pl_copy.value.numbers;
+            }
+            /* we serialize with %f for our reference visitors, so rather than
+             * fuzzy * floating math to test "equality", just compare the
+             * formatted values
+             */
+            double1 = g_malloc0(calc_float_string_storage(pt->value.number));
+            double2 = g_malloc0(calc_float_string_storage(ptr->value));
+            g_assert_cmpstr(double1, ==, double2);
+            g_free(double1);
+            g_free(double2);
+            break;
+        }
+        case PTYPE_BOOLEAN: {
+            boolList *ptr;
+            if (cur_head) {
+                ptr = cur_head;
+                cur_head = ptr->next;
+            } else {
+                cur_head = ptr = pl_copy.value.booleans;
+            }
+            g_assert_cmpint(!!pt->value.boolean, ==, !!ptr->value);
+            break;
+        }
+        default:
+            g_assert(0);
+        }
+        i++;
+    } while (cur_head);
+
+    g_assert_cmpint(i, ==, 33);
+
+    ops->cleanup(serialize_data);
+    dealloc_helper(&pl, visit_primitive_list, &err);
+    g_assert(!err);
+    dealloc_helper(&pl_copy, visit_primitive_list, &err);
+    g_assert(!err);
+    g_free(args);
+}
+
 static void test_struct(gconstpointer opaque)
 {
     TestArgs *args = (TestArgs *) opaque;
@@ -728,7 +920,8 @@ static const SerializeOps visitors[] = {
         .serialize = qmp_serialize,
         .deserialize = qmp_deserialize,
         .cleanup = qmp_cleanup,
-        .caps = VCAP_PRIMITIVES | VCAP_STRUCTURES | VCAP_LISTS
+        .caps = VCAP_PRIMITIVES | VCAP_STRUCTURES | VCAP_LISTS |
+                VCAP_PRIMITIVE_LISTS
     },
     {
         .type = "String",
@@ -782,6 +975,24 @@ static void add_visitor_type(const SerializeOps *ops)
         args->test_data = NULL;
         g_test_add_data_func(testname, args, test_nested_struct_list);
     }
+
+    if (ops->caps & VCAP_PRIMITIVE_LISTS) {
+        i = 0;
+        while (pt_values[i].type != PTYPE_EOL) {
+            if (pt_values[i].type == PTYPE_STRING
+                || pt_values[i].type == PTYPE_NUMBER
+                || pt_values[i].type == PTYPE_BOOLEAN
+                || pt_values[i].type == PTYPE_INTEGER) {
+                sprintf(testname, "%s/primitive_list/%s", testname_prefix,
+                        pt_values[i].description);
+                args = g_malloc0(sizeof(*args));
+                args->ops = ops;
+                args->test_data = &pt_values[i];
+                g_test_add_data_func(testname, args, test_primitive_lists);
+            }
+            i++;
+        }
+    }
 }
 
 int main(int argc, char **argv)
-- 
1.7.9.5

Re: [Qemu-devel] [PATCH 6/8] qapi: add native list coverage for visitor serialization tests

[Laszlo Ersek]

On 05/09/13 01:33, Michael Roth wrote:

> +        case PTYPE_NUMBER: {
> +            numberList *ptr;
> +            char *double1, *double2;
> +            if (cur_head) {
> +                ptr = cur_head;
> +                cur_head = ptr->next;
> +            } else {
> +                cur_head = ptr = pl_copy.value.numbers;
> +            }
> +            /* we serialize with %f for our reference visitors, so rather than
> +             * fuzzy * floating math to test "equality", just compare the
> +             * formatted values
> +             */

I think this comment block has been copied from elsewhere in this file,
indented more deeply and re-filled. There's an asterisk in the comment
body now.


> +            double1 = g_malloc0(calc_float_string_storage(pt->value.number));
> +            double2 = g_malloc0(calc_float_string_storage(ptr->value));
> +            g_assert_cmpstr(double1, ==, double2);

Are you comparing empty strings? Space is allocated and zeroed, but I
can't see where the values are actually formatted.

(Same holds for the original instance of this code, test_primitives().)

> +            g_free(double1);
> +            g_free(double2);
> +            break;
> +        }

Thanks,
Laszlo

Re: [Qemu-devel] [PATCH 6/8] qapi: add native list coverage for visitor serialization tests

[mdroth]

On Thu, May 09, 2013 at 02:31:03PM +0200, Laszlo Ersek wrote:
> On 05/09/13 01:33, Michael Roth wrote:
> 
> > +        case PTYPE_NUMBER: {
> > +            numberList *ptr;
> > +            char *double1, *double2;
> > +            if (cur_head) {
> > +                ptr = cur_head;
> > +                cur_head = ptr->next;
> > +            } else {
> > +                cur_head = ptr = pl_copy.value.numbers;
> > +            }
> > +            /* we serialize with %f for our reference visitors, so rather than
> > +             * fuzzy * floating math to test "equality", just compare the
> > +             * formatted values
> > +             */
> 
> I think this comment block has been copied from elsewhere in this file,
> indented more deeply and re-filled. There's an asterisk in the comment
> body now.

Yes :) Will fix it on the next pass.

> 
> 
> > +            double1 = g_malloc0(calc_float_string_storage(pt->value.number));
> > +            double2 = g_malloc0(calc_float_string_storage(ptr->value));
> > +            g_assert_cmpstr(double1, ==, double2);
> 
> Are you comparing empty strings? Space is allocated and zeroed, but I
> can't see where the values are actually formatted.

Well, that's embarassing...

> 
> (Same holds for the original instance of this code, test_primitives().)
> 

but at least I can blame it on the fact that I copied it from here
(we'll just ignore who the original author was :)

Will add a patch on the next pass to fix the original instance
beforehand.

Thanks for the catch!

> > +            g_free(double1);
> > +            g_free(double2);
> > +            break;
> > +        }
> 
> Thanks,
> Laszlo
> 

[Qemu-devel] [PATCH 7/8] qapi: add native list coverage for QMP output visitor tests

[Michael Roth]

This exercises schema-generated visitors for native list types and does
some sanity checking on validity of serialized data.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 qapi-schema-test.json           |    8 ++
 tests/test-qmp-output-visitor.c |  172 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 180 insertions(+)

diff --git a/qapi-schema-test.json b/qapi-schema-test.json
index 9eae350..6e37be8 100644
--- a/qapi-schema-test.json
+++ b/qapi-schema-test.json
@@ -32,6 +32,14 @@
 { 'union': 'UserDefUnion',
   'data': { 'a' : 'UserDefA', 'b' : 'UserDefB' } }
 
+# for testing native lists
+{ 'union': 'UserDefNativeListUnion',
+  'data': { 'integer': ['int'],
+            'number': ['number'],
+            'boolean': ['bool'],
+            'string': ['str'],
+            'userdef': ['UserDefOne'] } }
+
 # testing commands
 { 'command': 'user_def_cmd', 'data': {} }
 { 'command': 'user_def_cmd1', 'data': {'ud1a': 'UserDefOne'} }
diff --git a/tests/test-qmp-output-visitor.c b/tests/test-qmp-output-visitor.c
index 71367e6..40c583a 100644
--- a/tests/test-qmp-output-visitor.c
+++ b/tests/test-qmp-output-visitor.c
@@ -431,6 +431,170 @@ static void test_visitor_out_union(TestOutputVisitorData *data,
     QDECREF(qdict);
 }
 
+static void init_native_list(UserDefNativeListUnion *cvalue)
+{
+    int i;
+    switch (cvalue->kind) {
+    case USER_DEF_NATIVE_LIST_UNION_KIND_INTEGER: {
+        intList **list = &cvalue->integer;
+        for (i = 0; i < 32; i++) {
+            *list = g_new0(intList, 1);
+            (*list)->value = i;
+            (*list)->next = NULL;
+            list = &(*list)->next;
+        }
+        break;
+    }
+    case USER_DEF_NATIVE_LIST_UNION_KIND_BOOLEAN: {
+        boolList **list = &cvalue->boolean;
+        for (i = 0; i < 32; i++) {
+            *list = g_new0(boolList, 1);
+            (*list)->value = (i % 3 == 0);
+            (*list)->next = NULL;
+            list = &(*list)->next;
+        }
+        break;
+    }
+    case USER_DEF_NATIVE_LIST_UNION_KIND_STRING: {
+        strList **list = &cvalue->string;
+        for (i = 0; i < 32; i++) {
+            *list = g_new0(strList, 1);
+            (*list)->value = g_strdup_printf("%d", i);
+            (*list)->next = NULL;
+            list = &(*list)->next;
+        }
+        break;
+    }
+    case USER_DEF_NATIVE_LIST_UNION_KIND_NUMBER: {
+        numberList **list = &cvalue->number;
+        for (i = 0; i < 32; i++) {
+            *list = g_new0(numberList, 1);
+            (*list)->value = (double)i / 3;
+            (*list)->next = NULL;
+            list = &(*list)->next;
+        }
+        break;
+    }
+    default:
+        g_assert(false);
+    }
+}
+
+static void check_native_list(QObject *qobj,
+                              UserDefNativeListUnionKind kind)
+{
+    QDict *qdict;
+    QList *qlist;
+    int i;
+
+    g_assert(qobj);
+    g_assert(qobject_type(qobj) == QTYPE_QDICT);
+    qdict = qobject_to_qdict(qobj);
+    g_assert(qdict);
+    g_assert(qdict_haskey(qdict, "data"));
+    qlist = qlist_copy(qobject_to_qlist(qdict_get(qdict, "data")));
+
+    switch (kind) {
+    case USER_DEF_NATIVE_LIST_UNION_KIND_INTEGER:
+        for (i = 0; i < 32; i++) {
+            QObject *tmp;
+            QInt *qvalue;
+            tmp = qlist_peek(qlist);
+            g_assert(tmp);
+            qvalue = qobject_to_qint(tmp);
+            g_assert_cmpint(qint_get_int(qvalue), ==, i);
+            qobject_decref(qlist_pop(qlist));
+        }
+        break;
+    case USER_DEF_NATIVE_LIST_UNION_KIND_BOOLEAN:
+        for (i = 0; i < 32; i++) {
+            QObject *tmp;
+            QBool *qvalue;
+            tmp = qlist_peek(qlist);
+            g_assert(tmp);
+            qvalue = qobject_to_qbool(tmp);
+            g_assert_cmpint(qbool_get_int(qvalue), ==, (i % 3 == 0) ? 1 : 0);
+            qobject_decref(qlist_pop(qlist));
+        }
+        break;
+    case USER_DEF_NATIVE_LIST_UNION_KIND_STRING:
+        for (i = 0; i < 32; i++) {
+            QObject *tmp;
+            QString *qvalue;
+            gchar str[8];
+            tmp = qlist_peek(qlist);
+            g_assert(tmp);
+            qvalue = qobject_to_qstring(tmp);
+            sprintf(str, "%d", i);
+            g_assert_cmpstr(qstring_get_str(qvalue), ==, str);
+            qobject_decref(qlist_pop(qlist));
+        }
+        break;
+    case USER_DEF_NATIVE_LIST_UNION_KIND_NUMBER:
+#define DOUBLE_STR_MAX 16
+        for (i = 0; i < 32; i++) {
+            QObject *tmp;
+            QFloat *qvalue;
+            gchar str_expected[DOUBLE_STR_MAX], str_actual[DOUBLE_STR_MAX];
+            tmp = qlist_peek(qlist);
+            g_assert(tmp);
+            qvalue = qobject_to_qfloat(tmp);
+            snprintf(str_expected, DOUBLE_STR_MAX, "%3.4f", (double)i / 3);
+            snprintf(str_actual, DOUBLE_STR_MAX, "%3.4f", qfloat_get_double(qvalue));
+            g_assert_cmpstr(str_actual, ==, str_expected);
+            qobject_decref(qlist_pop(qlist));
+        }
+        break;
+    default:
+        g_assert(false);
+    }
+    QDECREF(qlist);
+}
+
+static void test_native_list(TestOutputVisitorData *data,
+                             const void *unused,
+                             UserDefNativeListUnionKind kind)
+{
+    UserDefNativeListUnion *cvalue = g_new0(UserDefNativeListUnion, 1);
+    Error *err = NULL;
+    QObject *obj;
+
+    cvalue->kind = kind;
+    init_native_list(cvalue);
+
+    visit_type_UserDefNativeListUnion(data->ov, &cvalue, NULL, &err);
+    g_assert(err == NULL);
+
+    obj = qmp_output_get_qobject(data->qov);
+    check_native_list(obj, cvalue->kind);
+    qapi_free_UserDefNativeListUnion(cvalue);
+    qobject_decref(obj);
+}
+
+static void test_visitor_out_native_list_int(TestOutputVisitorData *data,
+                                             const void *unused)
+{
+    test_native_list(data, unused, USER_DEF_NATIVE_LIST_UNION_KIND_INTEGER);
+}
+
+static void test_visitor_out_native_list_bool(TestOutputVisitorData *data,
+                                              const void *unused)
+{
+    test_native_list(data, unused, USER_DEF_NATIVE_LIST_UNION_KIND_BOOLEAN);
+}
+
+static void test_visitor_out_native_list_str(TestOutputVisitorData *data,
+                                              const void *unused)
+{
+    test_native_list(data, unused, USER_DEF_NATIVE_LIST_UNION_KIND_STRING);
+}
+
+static void test_visitor_out_native_list_number(TestOutputVisitorData *data,
+                                                const void *unused)
+{
+    test_native_list(data, unused, USER_DEF_NATIVE_LIST_UNION_KIND_NUMBER);
+}
+
 static void output_visitor_test_add(const char *testpath,
                                     TestOutputVisitorData *data,
                                     void (*test_func)(TestOutputVisitorData *data, const void *user_data))
@@ -471,6 +635,14 @@ int main(int argc, char **argv)
                             &out_visitor_data, test_visitor_out_list_qapi_free);
     output_visitor_test_add("/visitor/output/union",
                             &out_visitor_data, test_visitor_out_union);
+    output_visitor_test_add("/visitor/output/native_list/int",
+                            &out_visitor_data, test_visitor_out_native_list_int);
+    output_visitor_test_add("/visitor/output/native_list/bool",
+                            &out_visitor_data, test_visitor_out_native_list_bool);
+    output_visitor_test_add("/visitor/output/native_list/string",
+                            &out_visitor_data, test_visitor_out_native_list_str);
+    output_visitor_test_add("/visitor/output/native_list/number",
+                            &out_visitor_data, test_visitor_out_native_list_number);
 
     g_test_run();
 
-- 
1.7.9.5

[Qemu-devel] [PATCH 8/8] qapi: add native list coverage for QMP input visitor tests

[Michael Roth]

This exercises schema-generated visitors for native list types and does
some sanity checking on validity of deserialized data.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 tests/test-qmp-input-visitor.c |  181 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 181 insertions(+)

diff --git a/tests/test-qmp-input-visitor.c b/tests/test-qmp-input-visitor.c
index 955a4c0..86a1515 100644
--- a/tests/test-qmp-input-visitor.c
+++ b/tests/test-qmp-input-visitor.c
@@ -61,6 +61,31 @@ Visitor *visitor_input_test_init(TestInputVisitorData *data,
     return v;
 }
 
+/* similar to visitor_input_test_init(), but does not expect a string
+ * literal/format json_string argument and so can be used for
+ * programatically generated strings (and we can't pass in programatically
+ * generated strings via %s format parameters since qobject_from_jsonv()
+ * will wrap those in double-quotes and treat the entire object as a
+ * string)
+ */
+static Visitor *visitor_input_test_init_raw(TestInputVisitorData *data,
+                                            const char *json_string)
+{
+    Visitor *v;
+
+    data->obj = qobject_from_json(json_string);
+
+    g_assert(data->obj != NULL);
+
+    data->qiv = qmp_input_visitor_new(data->obj);
+    g_assert(data->qiv != NULL);
+
+    v = qmp_input_get_visitor(data->qiv);
+    g_assert(v != NULL);
+
+    return v;
+}
+
 static void test_visitor_in_int(TestInputVisitorData *data,
                                 const void *unused)
 {
@@ -259,6 +284,154 @@ static void test_visitor_in_union(TestInputVisitorData *data,
     qapi_free_UserDefUnion(tmp);
 }
 
+static void test_visitor_in_native_list_int(TestInputVisitorData *data,
+                                            const void *unused)
+{
+    UserDefNativeListUnion *cvalue = NULL;
+    intList *elem = NULL;
+    Error *err = NULL;
+    Visitor *v;
+    GString *gstr_list = g_string_new("");
+    GString *gstr_union = g_string_new("");
+    int i;
+
+    for (i = 0; i < 32; i++) {
+        g_string_append_printf(gstr_list, "%d", i);
+        if (i != 31) {
+            g_string_append(gstr_list, ", ");
+        }
+    }
+    g_string_append_printf(gstr_union,  "{ 'type': 'integer', 'data': [ %s ] }",
+                           gstr_list->str);
+    v = visitor_input_test_init_raw(data,  gstr_union->str);
+
+    visit_type_UserDefNativeListUnion(v, &cvalue, NULL, &err);
+    g_assert(err == NULL);
+    g_assert(cvalue != NULL);
+    g_assert_cmpint(cvalue->kind, ==, USER_DEF_NATIVE_LIST_UNION_KIND_INTEGER);
+
+    for (i = 0, elem = cvalue->integer; elem; elem = elem->next, i++) {
+        g_assert_cmpint(elem->value, ==, i);
+    }
+
+    g_string_free(gstr_union, true);
+    g_string_free(gstr_list, true);
+    qapi_free_UserDefNativeListUnion(cvalue);
+}
+
+static void test_visitor_in_native_list_bool(TestInputVisitorData *data,
+                                            const void *unused)
+{
+    UserDefNativeListUnion *cvalue = NULL;
+    boolList *elem = NULL;
+    Error *err = NULL;
+    Visitor *v;
+    GString *gstr_list = g_string_new("");
+    GString *gstr_union = g_string_new("");
+    int i;
+
+    for (i = 0; i < 32; i++) {
+        g_string_append_printf(gstr_list, "%s",
+                               (i % 3 == 0) ? "true" : "false");
+        if (i != 31) {
+            g_string_append(gstr_list, ", ");
+        }
+    }
+    g_string_append_printf(gstr_union,  "{ 'type': 'boolean', 'data': [ %s ] }",
+                           gstr_list->str);
+    v = visitor_input_test_init_raw(data,  gstr_union->str);
+
+    visit_type_UserDefNativeListUnion(v, &cvalue, NULL, &err);
+    g_assert(err == NULL);
+    g_assert(cvalue != NULL);
+    g_assert_cmpint(cvalue->kind, ==, USER_DEF_NATIVE_LIST_UNION_KIND_BOOLEAN);
+
+    for (i = 0, elem = cvalue->boolean; elem; elem = elem->next, i++) {
+        g_assert_cmpint(elem->value, ==, (i % 3 == 0) ? 1 : 0);
+    }
+
+    g_string_free(gstr_union, true);
+    g_string_free(gstr_list, true);
+    qapi_free_UserDefNativeListUnion(cvalue);
+}
+
+static void test_visitor_in_native_list_string(TestInputVisitorData *data,
+                                               const void *unused)
+{
+    UserDefNativeListUnion *cvalue = NULL;
+    strList *elem = NULL;
+    Error *err = NULL;
+    Visitor *v;
+    GString *gstr_list = g_string_new("");
+    GString *gstr_union = g_string_new("");
+    int i;
+
+    for (i = 0; i < 32; i++) {
+        g_string_append_printf(gstr_list, "'%d'", i);
+        if (i != 31) {
+            g_string_append(gstr_list, ", ");
+        }
+    }
+    g_string_append_printf(gstr_union,  "{ 'type': 'string', 'data': [ %s ] }",
+                           gstr_list->str);
+    v = visitor_input_test_init_raw(data,  gstr_union->str);
+
+    visit_type_UserDefNativeListUnion(v, &cvalue, NULL, &err);
+    g_assert(err == NULL);
+    g_assert(cvalue != NULL);
+    g_assert_cmpint(cvalue->kind, ==, USER_DEF_NATIVE_LIST_UNION_KIND_STRING);
+
+    for (i = 0, elem = cvalue->string; elem; elem = elem->next, i++) {
+        gchar str[8];
+        sprintf(str, "%d", i);
+        g_assert_cmpstr(elem->value, ==, str);
+    }
+
+    g_string_free(gstr_union, true);
+    g_string_free(gstr_list, true);
+    qapi_free_UserDefNativeListUnion(cvalue);
+}
+
+#define DOUBLE_STR_MAX 16
+
+static void test_visitor_in_native_list_number(TestInputVisitorData *data,
+                                               const void *unused)
+{
+    UserDefNativeListUnion *cvalue = NULL;
+    numberList *elem = NULL;
+    Error *err = NULL;
+    Visitor *v;
+    GString *gstr_list = g_string_new("");
+    GString *gstr_union = g_string_new("");
+    int i;
+
+    for (i = 0; i < 32; i++) {
+        g_string_append_printf(gstr_list, "%f", (double)i / 3);
+        if (i != 31) {
+            g_string_append(gstr_list, ", ");
+        }
+    }
+    g_string_append_printf(gstr_union,  "{ 'type': 'number', 'data': [ %s ] }",
+                           gstr_list->str);
+    v = visitor_input_test_init_raw(data,  gstr_union->str);
+
+    visit_type_UserDefNativeListUnion(v, &cvalue, NULL, &err);
+    g_assert(err == NULL);
+    g_assert(cvalue != NULL);
+    g_assert_cmpint(cvalue->kind, ==, USER_DEF_NATIVE_LIST_UNION_KIND_NUMBER);
+
+    for (i = 0, elem = cvalue->number; elem; elem = elem->next, i++) {
+        gchar str_expected[DOUBLE_STR_MAX], str_actual[DOUBLE_STR_MAX];
+        snprintf(str_expected, DOUBLE_STR_MAX, "%3.4f", (double)i / 3);
+        snprintf(str_actual, DOUBLE_STR_MAX, "%3.4f", elem->value);
+        g_assert_cmpstr(str_actual, ==, str_expected);
+    }
+
+    g_string_free(gstr_union, true);
+    g_string_free(gstr_list, true);
+    qapi_free_UserDefNativeListUnion(cvalue);
+}
+
 static void input_visitor_test_add(const char *testpath,
                                    TestInputVisitorData *data,
                                    void (*test_func)(TestInputVisitorData *data, const void *user_data))
@@ -310,6 +483,14 @@ int main(int argc, char **argv)
                             &in_visitor_data, test_visitor_in_union);
     input_visitor_test_add("/visitor/input/errors",
                             &in_visitor_data, test_visitor_in_errors);
+    input_visitor_test_add("/visitor/input/native_list/int",
+                            &in_visitor_data, test_visitor_in_native_list_int);
+    input_visitor_test_add("/visitor/input/native_list/bool",
+                            &in_visitor_data, test_visitor_in_native_list_bool);
+    input_visitor_test_add("/visitor/input/native_list/str",
+                            &in_visitor_data, test_visitor_in_native_list_string);
+    input_visitor_test_add("/visitor/input/native_list/number",
+                            &in_visitor_data, test_visitor_in_native_list_number);
 
     g_test_run();
 
-- 
1.7.9.5

Re: [Qemu-devel] [PATCH 0/8] qapi: add support for lists of native types

[Laszlo Ersek]

On 05/09/13 01:33, Michael Roth wrote:
> These patches apply on top of qemu.git master, and can also be obtained from:
> git://github.com/mdroth/qemu.git qapi-native-lists
> 
> Sending this now since a number of series have popped up in the past that
> wanted this, and Amos has some pending patches (query-mac-tables) that rely
> on this as well.
> 
> These patches add support for specifying lists of native qapi types
> (int/bool/str/number) like so:
> 
>   { 'type': 'foo',
>     'data': { 'bar': ['int'] }}
> 
> for a 'bar' field that is a list of type 'int',
> 
>   { 'type': 'foo2',
>     'data': { 'bar2': ['str'] }}
> 
> for a 'bar2' field that is a list of type 'str', and so on.
> 
> This uses linked list types for the native C representations, just as we do
> for complex schema-defined types. In the future we may add schema annotations
> of some sort to specify a more natural/efficient array type for the C
> representations, but this should serve the majority of uses-cases for now.
> 
>  Makefile                           |    6 +-
>  qapi-schema-test.json              |    8 ++
>  scripts/qapi-types.py              |   44 ++++++-
>  scripts/qapi-visit.py              |   36 ++++-
>  scripts/qapi.py                    |   21 +++
>  tests/test-qmp-input-visitor.c     |  181 +++++++++++++++++++++++++
>  tests/test-qmp-output-visitor.c    |  172 ++++++++++++++++++++++++
>  tests/test-visitor-serialization.c |  256 +++++++++++++++++++++++++++++++++---
>  8 files changed, 692 insertions(+), 32 deletions(-)
> 
> 

Two notes:
- the remark I made for 6/8 (comparing empty strings),

- for 7/8 and 8/8: the format specification %3.4f is not very useful.
"3" is the field width, "4" is the precision, and the latter means for
%f the number of digits printed after the radix character. It's not
useful to specify a smaller field width (which covers the entire output
string) than precision here.

Other than these nothing pokes me in the eye.

Laszlo

Re: [Qemu-devel] [PATCH 0/8] qapi: add support for lists of native types

[mdroth]

On Thu, May 09, 2013 at 03:31:08PM +0200, Laszlo Ersek wrote:
> On 05/09/13 01:33, Michael Roth wrote:
> > These patches apply on top of qemu.git master, and can also be obtained from:
> > git://github.com/mdroth/qemu.git qapi-native-lists
> > 
> > Sending this now since a number of series have popped up in the past that
> > wanted this, and Amos has some pending patches (query-mac-tables) that rely
> > on this as well.
> > 
> > These patches add support for specifying lists of native qapi types
> > (int/bool/str/number) like so:
> > 
> >   { 'type': 'foo',
> >     'data': { 'bar': ['int'] }}
> > 
> > for a 'bar' field that is a list of type 'int',
> > 
> >   { 'type': 'foo2',
> >     'data': { 'bar2': ['str'] }}
> > 
> > for a 'bar2' field that is a list of type 'str', and so on.
> > 
> > This uses linked list types for the native C representations, just as we do
> > for complex schema-defined types. In the future we may add schema annotations
> > of some sort to specify a more natural/efficient array type for the C
> > representations, but this should serve the majority of uses-cases for now.
> > 
> >  Makefile                           |    6 +-
> >  qapi-schema-test.json              |    8 ++
> >  scripts/qapi-types.py              |   44 ++++++-
> >  scripts/qapi-visit.py              |   36 ++++-
> >  scripts/qapi.py                    |   21 +++
> >  tests/test-qmp-input-visitor.c     |  181 +++++++++++++++++++++++++
> >  tests/test-qmp-output-visitor.c    |  172 ++++++++++++++++++++++++
> >  tests/test-visitor-serialization.c |  256 +++++++++++++++++++++++++++++++++---
> >  8 files changed, 692 insertions(+), 32 deletions(-)
> > 
> > 
> 
> Two notes:
> - the remark I made for 6/8 (comparing empty strings),
> 
> - for 7/8 and 8/8: the format specification %3.4f is not very useful.
> "3" is the field width, "4" is the precision, and the latter means for
> %f the number of digits printed after the radix character. It's not
> useful to specify a smaller field width (which covers the entire output
> string) than precision here.

Yup, that's a mistake. The field width isn't useful at all for what I
was intending actually (to constrain the whole portion of float so that
the fractional portion wouldn't get truncated by snprintf and make the
test less likely to catch re-encoding issues). I think just using %.4f
should suffice since we have plenty of extra buffer space for the values
we're working with (max being 32 / 3) so I'll do that for the next pass.

> 
> Other than these nothing pokes me in the eye.
> 
> Laszlo
>