migration: remove unused field bytes_xfer

[mirror_qemu.git] / qobject / qnum.c

diff --git a/qobject/qnum.c b/qobject/qnum.c
index 476e81c93b37f35c3ac131ba5c5396357826fc7e..7012fc57f2fbe5bbbc71add116a66eecc9a70103 100644 (file)
--- a/qobject/qnum.c
+++ b/qobject/qnum.c
@@ -13,10 +13,7 @@
  */
 
 #include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qapi/qmp/qnum.h"
-#include "qapi/qmp/qobject.h"
-#include "qemu-common.h"
 
 /**
  * qnum_from_int(): Create a new QNum from an int64_t
@@ -202,14 +199,57 @@ char *qnum_to_string(QNum *qn)
 }
 
 /**
- * qobject_to_qnum(): Convert a QObject into a QNum
+ * qnum_is_equal(): Test whether the two QNums are equal
+ *
+ * Negative integers are never considered equal to unsigned integers,
+ * but positive integers in the range [0, INT64_MAX] are considered
+ * equal independently of whether the QNum's kind is i64 or u64.
+ *
+ * Doubles are never considered equal to integers.
  */
-QNum *qobject_to_qnum(const QObject *obj)
+bool qnum_is_equal(const QObject *x, const QObject *y)
 {
-    if (!obj || qobject_type(obj) != QTYPE_QNUM) {
-        return NULL;
+    QNum *num_x = qobject_to(QNum, x);
+    QNum *num_y = qobject_to(QNum, y);
+
+    switch (num_x->kind) {
+    case QNUM_I64:
+        switch (num_y->kind) {
+        case QNUM_I64:
+            /* Comparison in native int64_t type */
+            return num_x->u.i64 == num_y->u.i64;
+        case QNUM_U64:
+            /* Implicit conversion of x to uin64_t, so we have to
+             * check its sign before */
+            return num_x->u.i64 >= 0 && num_x->u.i64 == num_y->u.u64;
+        case QNUM_DOUBLE:
+            return false;
+        }
+        abort();
+    case QNUM_U64:
+        switch (num_y->kind) {
+        case QNUM_I64:
+            return qnum_is_equal(y, x);
+        case QNUM_U64:
+            /* Comparison in native uint64_t type */
+            return num_x->u.u64 == num_y->u.u64;
+        case QNUM_DOUBLE:
+            return false;
+        }
+        abort();
+    case QNUM_DOUBLE:
+        switch (num_y->kind) {
+        case QNUM_I64:
+        case QNUM_U64:
+            return false;
+        case QNUM_DOUBLE:
+            /* Comparison in native double type */
+            return num_x->u.dbl == num_y->u.dbl;
+        }
+        abort();
     }
-    return container_of(obj, QNum, base);
+
+    abort();
 }
 
 /**
@@ -219,5 +259,5 @@ QNum *qobject_to_qnum(const QObject *obj)
 void qnum_destroy_obj(QObject *obj)
 {
     assert(obj != NULL);
-    g_free(qobject_to_qnum(obj));
+    g_free(qobject_to(QNum, obj));
 }