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bh=hEf6QWe1NZrQUT3H/uhkT2eCsB5nbcOOCywAEsktkNQ=; b=TPkllmr4F7bDPiekge11wOSocjYA/mSDzJ2VOcoEjje3/RiXYfLmu2tSZyEoQ7x6T7xaVX qhg+VYcTUBpjWiiD6/ICPay/mof0H8T2x7Lhi6Kwr3B8n4LiBtbCtXsPkGn/OYe6Dt6tis M8hroHTfQBufOSynDo4nxg82TgIa7C4= X-MC-Unique: T0nM2eQ_NUm9DRs8WLQgAQ-1 From: Eduardo Habkost To: qemu-devel@nongnu.org Subject: [PATCH v3 03/19] qnum: QNumValue type for QNum value literals Date: Mon, 23 Nov 2020 14:48:02 -0500 Message-Id: <20201123194818.2773508-4-ehabkost@redhat.com> In-Reply-To: <20201123194818.2773508-1-ehabkost@redhat.com> References: <20201123194818.2773508-1-ehabkost@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=ehabkost@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=ehabkost@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Markus Armbruster , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Eduardo Habkost Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Provide a separate QNumValue type that can be used for QNum value literals without the referencing counting and memory allocation features provided by QObject. Signed-off-by: Eduardo Habkost --- Changes v2 -> v3: * Fixed copy-pasta at qnum_from_value() documentation * Removed qnum_get_value() function * Moved doc comment of qnum_from_value() to .c file, for consistency with other functions. * Removed "private:" doc comment at QNumValue. * Removed unnecessary kernel-doc noise (obvious parameter descriptions). * Removed space after type cast in qnum_from_*(). * qnum_is_equal() variable const-ness & renames: * Renamed new QNumValue variables to val_x/val_y. * Keep existing QNum num_x/num_y variable names. * const-ness change of num_x/num_y was moved to a separate patch. Changes v1 -> v2: * Fix "make check" failure, by updating check-qnum unit test to use the new struct fields --- include/qapi/qmp/qnum.h | 23 ++++++++++- qobject/qnum.c | 91 ++++++++++++++++++++++------------------- tests/check-qnum.c | 14 +++---- 3 files changed, 76 insertions(+), 52 deletions(-) diff --git a/include/qapi/qmp/qnum.h b/include/qapi/qmp/qnum.h index 3e9ecd324e..03193dca20 100644 --- a/include/qapi/qmp/qnum.h +++ b/include/qapi/qmp/qnum.h @@ -44,16 +44,35 @@ typedef enum { * in range: qnum_get_try_int() / qnum_get_try_uint() check range and * convert under the hood. */ -struct QNum { - struct QObjectBase_ base; + +/** + * struct QNumValue: the value of a QNum + * + * QNumValue literals can be constructed using the `QNUM_VAL_INT`, + * `QNUM_VAL_UINT`, and `QNUM_VAL_DOUBLE` macros. + */ +typedef struct QNumValue { QNumKind kind; union { int64_t i64; uint64_t u64; double dbl; } u; +} QNumValue; + +#define QNUM_VAL_INT(value) \ + { .kind =3D QNUM_I64, .u.i64 =3D value } +#define QNUM_VAL_UINT(value) \ + { .kind =3D QNUM_U64, .u.u64 =3D value } +#define QNUM_VAL_DOUBLE(value) \ + { .kind =3D QNUM_DOUBLE, .u.dbl =3D value } + +struct QNum { + struct QObjectBase_ base; + QNumValue value; }; =20 +QNum *qnum_from_value(QNumValue value); QNum *qnum_from_int(int64_t value); QNum *qnum_from_uint(uint64_t value); QNum *qnum_from_double(double value); diff --git a/qobject/qnum.c b/qobject/qnum.c index e5ea728638..94e668db60 100644 --- a/qobject/qnum.c +++ b/qobject/qnum.c @@ -16,21 +16,29 @@ #include "qapi/qmp/qnum.h" =20 /** - * qnum_from_int(): Create a new QNum from an int64_t + * qnum_from_value(): Create a new QNum from a QNumValue * * Return strong reference. */ -QNum *qnum_from_int(int64_t value) +QNum *qnum_from_value(QNumValue value) { QNum *qn =3D g_new(QNum, 1); =20 qobject_init(QOBJECT(qn), QTYPE_QNUM); - qn->kind =3D QNUM_I64; - qn->u.i64 =3D value; - + qn->value =3D value; return qn; } =20 +/** + * qnum_from_int(): Create a new QNum from an int64_t + * + * Return strong reference. + */ +QNum *qnum_from_int(int64_t value) +{ + return qnum_from_value((QNumValue)QNUM_VAL_INT(value)); +} + /** * qnum_from_uint(): Create a new QNum from an uint64_t * @@ -38,13 +46,7 @@ QNum *qnum_from_int(int64_t value) */ QNum *qnum_from_uint(uint64_t value) { - QNum *qn =3D g_new(QNum, 1); - - qobject_init(QOBJECT(qn), QTYPE_QNUM); - qn->kind =3D QNUM_U64; - qn->u.u64 =3D value; - - return qn; + return qnum_from_value((QNumValue)QNUM_VAL_UINT(value)); } =20 /** @@ -54,13 +56,7 @@ QNum *qnum_from_uint(uint64_t value) */ QNum *qnum_from_double(double value) { - QNum *qn =3D g_new(QNum, 1); - - qobject_init(QOBJECT(qn), QTYPE_QNUM); - qn->kind =3D QNUM_DOUBLE; - qn->u.dbl =3D value; - - return qn; + return qnum_from_value((QNumValue)QNUM_VAL_DOUBLE(value)); } =20 /** @@ -70,15 +66,17 @@ QNum *qnum_from_double(double value) */ bool qnum_get_try_int(const QNum *qn, int64_t *val) { - switch (qn->kind) { + const QNumValue *qv =3D &qn->value; + + switch (qv->kind) { case QNUM_I64: - *val =3D qn->u.i64; + *val =3D qv->u.i64; return true; case QNUM_U64: - if (qn->u.u64 > INT64_MAX) { + if (qv->u.u64 > INT64_MAX) { return false; } - *val =3D qn->u.u64; + *val =3D qv->u.u64; return true; case QNUM_DOUBLE: return false; @@ -108,15 +106,17 @@ int64_t qnum_get_int(const QNum *qn) */ bool qnum_get_try_uint(const QNum *qn, uint64_t *val) { - switch (qn->kind) { + const QNumValue *qv =3D &qn->value; + + switch (qv->kind) { case QNUM_I64: - if (qn->u.i64 < 0) { + if (qv->u.i64 < 0) { return false; } - *val =3D qn->u.i64; + *val =3D qv->u.i64; return true; case QNUM_U64: - *val =3D qn->u.u64; + *val =3D qv->u.u64; return true; case QNUM_DOUBLE: return false; @@ -146,13 +146,15 @@ uint64_t qnum_get_uint(const QNum *qn) */ double qnum_get_double(const QNum *qn) { - switch (qn->kind) { + const QNumValue *qv =3D &qn->value; + + switch (qv->kind) { case QNUM_I64: - return qn->u.i64; + return qv->u.i64; case QNUM_U64: - return qn->u.u64; + return qv->u.u64; case QNUM_DOUBLE: - return qn->u.dbl; + return qv->u.dbl; } =20 assert(0); @@ -161,14 +163,15 @@ double qnum_get_double(const QNum *qn) =20 char *qnum_to_string(QNum *qn) { + const QNumValue *qv =3D &qn->value; char *buffer; int len; =20 - switch (qn->kind) { + switch (qv->kind) { case QNUM_I64: - return g_strdup_printf("%" PRId64, qn->u.i64); + return g_strdup_printf("%" PRId64, qv->u.i64); case QNUM_U64: - return g_strdup_printf("%" PRIu64, qn->u.u64); + return g_strdup_printf("%" PRIu64, qv->u.u64); case QNUM_DOUBLE: /* FIXME: snprintf() is locale dependent; but JSON requires * numbers to be formatted as if in the C locale. Dependence @@ -179,7 +182,7 @@ char *qnum_to_string(QNum *qn) * rounding errors; we should be using DBL_DECIMAL_DIG (17), * and only rounding to a shorter number if the result would * still produce the same floating point value. */ - buffer =3D g_strdup_printf("%f" , qn->u.dbl); + buffer =3D g_strdup_printf("%f" , qv->u.dbl); len =3D strlen(buffer); while (len > 0 && buffer[len - 1] =3D=3D '0') { len--; @@ -211,40 +214,42 @@ bool qnum_is_equal(const QObject *x, const QObject *y) { const QNum *num_x =3D qobject_to(QNum, x); const QNum *num_y =3D qobject_to(QNum, y); + const QNumValue *val_x =3D &num_x->value; + const QNumValue *val_y =3D &num_y->value; =20 - switch (num_x->kind) { + switch (val_x->kind) { case QNUM_I64: - switch (num_y->kind) { + switch (val_y->kind) { case QNUM_I64: /* Comparison in native int64_t type */ - return num_x->u.i64 =3D=3D num_y->u.i64; + return val_x->u.i64 =3D=3D val_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 >=3D 0 && num_x->u.i64 =3D=3D num_y->u.u64; + return val_x->u.i64 >=3D 0 && val_x->u.i64 =3D=3D val_y->u.u64; case QNUM_DOUBLE: return false; } abort(); case QNUM_U64: - switch (num_y->kind) { + switch (val_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 =3D=3D num_y->u.u64; + return val_x->u.u64 =3D=3D val_y->u.u64; case QNUM_DOUBLE: return false; } abort(); case QNUM_DOUBLE: - switch (num_y->kind) { + switch (val_y->kind) { case QNUM_I64: case QNUM_U64: return false; case QNUM_DOUBLE: /* Comparison in native double type */ - return num_x->u.dbl =3D=3D num_y->u.dbl; + return val_x->u.dbl =3D=3D val_y->u.dbl; } abort(); } diff --git a/tests/check-qnum.c b/tests/check-qnum.c index 4105015872..9499b0d845 100644 --- a/tests/check-qnum.c +++ b/tests/check-qnum.c @@ -30,8 +30,8 @@ static void qnum_from_int_test(void) =20 qn =3D qnum_from_int(value); g_assert(qn !=3D NULL); - g_assert_cmpint(qn->kind, =3D=3D, QNUM_I64); - g_assert_cmpint(qn->u.i64, =3D=3D, value); + g_assert_cmpint(qn->value.kind, =3D=3D, QNUM_I64); + g_assert_cmpint(qn->value.u.i64, =3D=3D, value); g_assert_cmpint(qn->base.refcnt, =3D=3D, 1); g_assert_cmpint(qobject_type(QOBJECT(qn)), =3D=3D, QTYPE_QNUM); =20 @@ -45,8 +45,8 @@ static void qnum_from_uint_test(void) =20 qn =3D qnum_from_uint(value); g_assert(qn !=3D NULL); - g_assert_cmpint(qn->kind, =3D=3D, QNUM_U64); - g_assert(qn->u.u64 =3D=3D value); + g_assert_cmpint(qn->value.kind, =3D=3D, QNUM_U64); + g_assert(qn->value.u.u64 =3D=3D value); g_assert(qn->base.refcnt =3D=3D 1); g_assert(qobject_type(QOBJECT(qn)) =3D=3D QTYPE_QNUM); =20 @@ -60,8 +60,8 @@ static void qnum_from_double_test(void) =20 qn =3D qnum_from_double(value); g_assert(qn !=3D NULL); - g_assert_cmpint(qn->kind, =3D=3D, QNUM_DOUBLE); - g_assert_cmpfloat(qn->u.dbl, =3D=3D, value); + g_assert_cmpint(qn->value.kind, =3D=3D, QNUM_DOUBLE); + g_assert_cmpfloat(qn->value.u.dbl, =3D=3D, value); g_assert_cmpint(qn->base.refcnt, =3D=3D, 1); g_assert_cmpint(qobject_type(QOBJECT(qn)), =3D=3D, QTYPE_QNUM); =20 @@ -74,7 +74,7 @@ static void qnum_from_int64_test(void) const int64_t value =3D 0x1234567890abcdefLL; =20 qn =3D qnum_from_int(value); - g_assert_cmpint((int64_t) qn->u.i64, =3D=3D, value); + g_assert_cmpint((int64_t) qn->value.u.i64, =3D=3D, value); =20 qobject_unref(qn); } --=20 2.28.0