| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | #ifndef QMLJS_MATH_H |
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| 4 | #define QMLJS_MATH_H |
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| 5 | |
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| 6 | // |
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| 7 | // W A R N I N G |
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| 8 | // ------------- |
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| 9 | // |
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| 10 | // This file is not part of the Qt API. It exists purely as an |
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| 11 | // implementation detail. This header file may change from version to |
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| 12 | // version without notice, or even be removed. |
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| 13 | // |
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| 14 | // We mean it. |
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| 15 | // |
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| 16 | |
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| 17 | #include <qglobal.h> |
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| 18 | |
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| 19 | #include <private/qv4staticvalue_p.h> |
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| 20 | #include <QtCore/qnumeric.h> |
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| 21 | #include <QtCore/private/qnumeric_p.h> |
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| 22 | #include <cmath> |
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| 23 | |
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| 24 | #if defined(Q_CC_GNU) |
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| 25 | #define QMLJS_READONLY __attribute((const)) |
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| 26 | #else |
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| 27 | #define QMLJS_READONLY |
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| 28 | #endif |
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| 29 | |
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| 30 | QT_BEGIN_NAMESPACE |
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| 31 | |
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| 32 | namespace QV4 { |
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| 33 | |
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| 34 | static inline QMLJS_READONLY ReturnedValue add_int32(int a, int b) |
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| 35 | { |
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| 36 | int result; |
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| 37 | if (Q_UNLIKELY(qAddOverflow(a, b, &result))) |
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| 38 | return StaticValue::fromDouble(d: static_cast<double>(a) + b).asReturnedValue(); |
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| 39 | return StaticValue::fromInt32(i: result).asReturnedValue(); |
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| 40 | } |
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| 41 | |
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| 42 | static inline QMLJS_READONLY ReturnedValue sub_int32(int a, int b) |
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| 43 | { |
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| 44 | int result; |
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| 45 | if (Q_UNLIKELY(qSubOverflow(a, b, &result))) |
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| 46 | return StaticValue::fromDouble(d: static_cast<double>(a) - b).asReturnedValue(); |
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| 47 | return StaticValue::fromInt32(i: result).asReturnedValue(); |
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| 48 | } |
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| 49 | |
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| 50 | static inline QMLJS_READONLY ReturnedValue mul_int32(int a, int b) |
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| 51 | { |
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| 52 | int result; |
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| 53 | if (Q_UNLIKELY(qMulOverflow(a, b, &result))) |
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| 54 | return StaticValue::fromDouble(d: static_cast<double>(a) * b).asReturnedValue(); |
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| 55 | // need to handle the case where one number is negative and the other 0 ==> -0 |
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| 56 | if (((a < 0) xor (b < 0)) && (result == 0)) |
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| 57 | return StaticValue::fromDouble(d: -0.0).asReturnedValue(); |
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| 58 | return StaticValue::fromInt32(i: result).asReturnedValue(); |
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| 59 | } |
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| 60 | |
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| 61 | } |
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| 62 | |
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| 63 | QT_END_NAMESPACE |
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| 64 | |
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| 65 | #ifdef QMLJS_READONLY |
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| 66 | #undef QMLJS_READONLY |
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| 67 | #endif |
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| 68 | |
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| 69 | #endif // QMLJS_MATH_H |
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| 70 | |
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