qapi: merge QInt and QFloat in QNum

We would like to use a same QObject type to represent numbers, whether
they are int, uint, or floats. Getters will allow some compatibility
between the various types if the number fits other representations.

Add a few more tests while at it.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170607163635.17635-7-marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[parse_stats_intervals() simplified a bit, comment in
test_visitor_in_int_overflow() tidied up, suppress bogus warnings]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

8 files changed, 58 insertions, 68 deletions

diff --git a/include/qapi/qmp/qdict.h b/include/qapi/qmp/qdict.h
index 188440a..363e431 100644
--- a/include/qapi/qmp/qdict.h
+++ b/include/qapi/qmp/qdict.h
@@ -15,6 +15,7 @@
 
 #include "qapi/qmp/qobject.h"
 #include "qapi/qmp/qlist.h"
+#include "qapi/qmp/qnum.h"
 #include "qemu/queue.h"
 
 #define QDICT_BUCKET_MAX 512
@@ -54,7 +55,7 @@ void qdict_destroy_obj(QObject *obj);
 
 /* Helpers for int, bool, and string */
 #define qdict_put_int(qdict, key, value) \
-        qdict_put(qdict, key, qint_from_int(value))
+        qdict_put(qdict, key, qnum_from_int(value))
 #define qdict_put_bool(qdict, key, value) \
         qdict_put(qdict, key, qbool_from_bool(value))
 #define qdict_put_str(qdict, key, value) \
diff --git a/include/qapi/qmp/qfloat.h b/include/qapi/qmp/qfloat.h
deleted file mode 100644
index b5d1583..0000000
--- a/include/qapi/qmp/qfloat.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * QFloat Module
- *
- * Copyright IBM, Corp. 2009
- *
- * 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 QFLOAT_H
-#define QFLOAT_H
-
-#include "qapi/qmp/qobject.h"
-
-typedef struct QFloat {
-    QObject base;
-    double value;
-} QFloat;
-
-QFloat *qfloat_from_double(double value);
-double qfloat_get_double(const QFloat *qi);
-QFloat *qobject_to_qfloat(const QObject *obj);
-void qfloat_destroy_obj(QObject *obj);
-
-#endif /* QFLOAT_H */
diff --git a/include/qapi/qmp/qint.h b/include/qapi/qmp/qint.h
deleted file mode 100644
index 3aaff76..0000000
--- a/include/qapi/qmp/qint.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * QInt Module
- *
- * Copyright (C) 2009 Red Hat Inc.
- *
- * Authors:
- *  Luiz Capitulino <lcapitulino@redhat.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 QINT_H
-#define QINT_H
-
-#include "qapi/qmp/qobject.h"
-
-typedef struct QInt {
-    QObject base;
-    int64_t value;
-} QInt;
-
-QInt *qint_from_int(int64_t value);
-int64_t qint_get_int(const QInt *qi);
-QInt *qobject_to_qint(const QObject *obj);
-void qint_destroy_obj(QObject *obj);
-
-#endif /* QINT_H */
diff --git a/include/qapi/qmp/qlist.h b/include/qapi/qmp/qlist.h
index 5dc4ed9..c4b5fda 100644
--- a/include/qapi/qmp/qlist.h
+++ b/include/qapi/qmp/qlist.h
@@ -14,6 +14,7 @@
 #define QLIST_H
 
 #include "qapi/qmp/qobject.h"
+#include "qapi/qmp/qnum.h"
 #include "qemu/queue.h"
 
 typedef struct QListEntry {
@@ -31,7 +32,7 @@ typedef struct QList {
 
 /* Helpers for int, bool, and string */
 #define qlist_append_int(qlist, value) \
-        qlist_append(qlist, qint_from_int(value))
+        qlist_append(qlist, qnum_from_int(value))
 #define qlist_append_bool(qlist, value) \
         qlist_append(qlist, qbool_from_bool(value))
 #define qlist_append_str(qlist, value) \
diff --git a/include/qapi/qmp/qnum.h b/include/qapi/qmp/qnum.h
new file mode 100644
index 0000000..e42b136
--- /dev/null
+++ b/include/qapi/qmp/qnum.h
@@ -0,0 +1,46 @@
+/*
+ * QNum Module
+ *
+ * Copyright (C) 2009 Red Hat Inc.
+ *
+ * Authors:
+ *  Luiz Capitulino <lcapitulino@redhat.com>
+ *  Anthony Liguori <aliguori@us.ibm.com>
+ *  Marc-André Lureau <marcandre.lureau@redhat.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 QNUM_H
+#define QNUM_H
+
+#include "qapi/qmp/qobject.h"
+
+typedef enum {
+    QNUM_I64,
+    QNUM_DOUBLE
+} QNumKind;
+
+typedef struct QNum {
+    QObject base;
+    QNumKind kind;
+    union {
+        int64_t i64;
+        double dbl;
+    } u;
+} QNum;
+
+QNum *qnum_from_int(int64_t value);
+QNum *qnum_from_double(double value);
+
+bool qnum_get_try_int(const QNum *qn, int64_t *val);
+int64_t qnum_get_int(const QNum *qn);
+double qnum_get_double(QNum *qn);
+
+char *qnum_to_string(QNum *qn);
+
+QNum *qobject_to_qnum(const QObject *obj);
+void qnum_destroy_obj(QObject *obj);
+
+#endif /* QNUM_H */
diff --git a/include/qapi/qmp/types.h b/include/qapi/qmp/types.h
index 27cfbd8..a4bc662 100644
--- a/include/qapi/qmp/types.h
+++ b/include/qapi/qmp/types.h
@@ -14,8 +14,7 @@
 #define QAPI_QMP_TYPES_H
 
 #include "qapi/qmp/qobject.h"
-#include "qapi/qmp/qint.h"
-#include "qapi/qmp/qfloat.h"
+#include "qapi/qmp/qnum.h"
 #include "qapi/qmp/qbool.h"
 #include "qapi/qmp/qstring.h"
 #include "qapi/qmp/qdict.h"
diff --git a/include/qapi/qobject-input-visitor.h b/include/qapi/qobject-input-visitor.h
index b399285..daee18c 100644
--- a/include/qapi/qobject-input-visitor.h
+++ b/include/qapi/qobject-input-visitor.h
@@ -30,9 +30,9 @@ typedef struct QObjectInputVisitor QObjectInputVisitor;
  * visit_type_FOO() creates an instance of QAPI type FOO.  The visited
  * QObject must match FOO.  QDict matches struct/union types, QList
  * matches list types, QString matches type 'str' and enumeration
- * types, QInt matches integer types, QFloat matches type 'number',
- * QBool matches type 'bool'.  Type 'any' is matched by QObject.  A
- * QAPI alternate type is matched when one of its member types is.
+ * types, QNum matches integer and float types, QBool matches type
+ * 'bool'.  Type 'any' is matched by QObject.  A QAPI alternate type
+ * is matched when one of its member types is.
  *
  * visit_start_struct() ... visit_end_struct() visits a QDict and
  * creates a QAPI struct/union.  Visits in between visit the
diff --git a/include/qapi/qobject-output-visitor.h b/include/qapi/qobject-output-visitor.h
index 9b990c3..e5a3490 100644
--- a/include/qapi/qobject-output-visitor.h
+++ b/include/qapi/qobject-output-visitor.h
@@ -28,10 +28,10 @@ typedef struct QObjectOutputVisitor QObjectOutputVisitor;
  *
  * visit_type_FOO() creates a QObject for QAPI type FOO.  It creates a
  * QDict for struct/union types, a QList for list types, QString for
- * type 'str' and enumeration types, QInt for integer types, QFloat
- * for type 'number', QBool for type 'bool'.  For type 'any', it
- * increments the QObject's reference count.  For QAPI alternate
- * types, it creates the QObject for the member that is in use.
+ * type 'str' and enumeration types, QNum for integer and float
+ * types, QBool for type 'bool'.  For type 'any', it increments the
+ * QObject's reference count.  For QAPI alternate types, it creates
+ * the QObject for the member that is in use.
  *
  * visit_start_struct() ... visit_end_struct() visits a QAPI
  * struct/union and creates a QDict.  Visits in between visit the