Anthony Liguori | ec072ce | 2009-11-11 10:36:08 -0600 | [diff] [blame] | 1 | /* |
| 2 | * QFloat Module |
| 3 | * |
Anthony Liguori | ec072ce | 2009-11-11 10:36:08 -0600 | [diff] [blame] | 4 | * Copyright IBM, Corp. 2009 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Anthony Liguori <aliguori@us.ibm.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. |
| 10 | * See the COPYING.LIB file in the top-level directory. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include "qfloat.h" |
| 15 | #include "qobject.h" |
| 16 | #include "qemu-common.h" |
| 17 | |
| 18 | static void qfloat_destroy_obj(QObject *obj); |
| 19 | |
| 20 | static const QType qfloat_type = { |
| 21 | .code = QTYPE_QFLOAT, |
| 22 | .destroy = qfloat_destroy_obj, |
| 23 | }; |
| 24 | |
| 25 | /** |
| 26 | * qfloat_from_int(): Create a new QFloat from a float |
| 27 | * |
| 28 | * Return strong reference. |
| 29 | */ |
| 30 | QFloat *qfloat_from_double(double value) |
| 31 | { |
| 32 | QFloat *qf; |
| 33 | |
| 34 | qf = qemu_malloc(sizeof(*qf)); |
| 35 | qf->value = value; |
| 36 | QOBJECT_INIT(qf, &qfloat_type); |
| 37 | |
| 38 | return qf; |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * qfloat_get_double(): Get the stored float |
| 43 | */ |
| 44 | double qfloat_get_double(const QFloat *qf) |
| 45 | { |
| 46 | return qf->value; |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * qobject_to_qfloat(): Convert a QObject into a QFloat |
| 51 | */ |
| 52 | QFloat *qobject_to_qfloat(const QObject *obj) |
| 53 | { |
| 54 | if (qobject_type(obj) != QTYPE_QFLOAT) |
| 55 | return NULL; |
| 56 | |
| 57 | return container_of(obj, QFloat, base); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * qfloat_destroy_obj(): Free all memory allocated by a |
| 62 | * QFloat object |
| 63 | */ |
| 64 | static void qfloat_destroy_obj(QObject *obj) |
| 65 | { |
| 66 | assert(obj != NULL); |
| 67 | qemu_free(qobject_to_qfloat(obj)); |
| 68 | } |