projects / apple / javascriptcore.git / blame
| Commit | Line | Data |
|---|---|---|
| 9dae56ea A |
1 | /* |
| 2 | * Copyright (C) 1999-2001 Harri Porten (porten@kde.org) | |
| 3 | * Copyright (C) 2001 Peter Kelly (pmk@post.com) | |
| 4 | * Copyright (C) 2003, 2007, 2008 Apple Inc. All rights reserved. | |
| 5 | * | |
| 6 | * This library is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Library General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * This library is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Library General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Library General Public License | |
| 17 | * along with this library; see the file COPYING.LIB. If not, write to | |
| 18 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
| 19 | * Boston, MA 02110-1301, USA. | |
| 20 | * | |
| 21 | */ | |
| 22 | ||
| 23 | #include "config.h" | |
| 24 | #include "JSValue.h" | |
| 25 | ||
| 26 | #include "JSFunction.h" | |
| 27 | #include <wtf/MathExtras.h> | |
| 28 | ||
| 29 | namespace JSC { | |
| 30 | ||
| 31 | static const double D32 = 4294967296.0; | |
| 32 | ||
| 33 | // ECMA 9.4 | |
| 34 | double JSValuePtr::toInteger(ExecState* exec) const | |
| 35 | { | |
| 36 | if (isInt32Fast()) | |
| 37 | return getInt32Fast(); | |
| 38 | double d = toNumber(exec); | |
| 39 | return isnan(d) ? 0.0 : trunc(d); | |
| 40 | } | |
| 41 | ||
| 42 | double JSValuePtr::toIntegerPreserveNaN(ExecState* exec) const | |
| 43 | { | |
| 44 | if (isInt32Fast()) | |
| 45 | return getInt32Fast(); | |
| 46 | return trunc(toNumber(exec)); | |
| 47 | } | |
| 48 | ||
| 49 | int32_t toInt32SlowCase(double d, bool& ok) | |
| 50 | { | |
| 51 | ok = true; | |
| 52 | ||
| 53 | if (d >= -D32 / 2 && d < D32 / 2) | |
| 54 | return static_cast<int32_t>(d); | |
| 55 | ||
| 56 | if (isnan(d) || isinf(d)) { | |
| 57 | ok = false; | |
| 58 | return 0; | |
| 59 | } | |
| 60 | ||
| 61 | double d32 = fmod(trunc(d), D32); | |
| 62 | if (d32 >= D32 / 2) | |
| 63 | d32 -= D32; | |
| 64 | else if (d32 < -D32 / 2) | |
| 65 | d32 += D32; | |
| 66 | return static_cast<int32_t>(d32); | |
| 67 | } | |
| 68 | ||
| 69 | uint32_t toUInt32SlowCase(double d, bool& ok) | |
| 70 | { | |
| 71 | ok = true; | |
| 72 | ||
| 73 | if (d >= 0.0 && d < D32) | |
| 74 | return static_cast<uint32_t>(d); | |
| 75 | ||
| 76 | if (isnan(d) || isinf(d)) { | |
| 77 | ok = false; | |
| 78 | return 0; | |
| 79 | } | |
| 80 | ||
| 81 | double d32 = fmod(trunc(d), D32); | |
| 82 | if (d32 < 0) | |
| 83 | d32 += D32; | |
| 84 | return static_cast<uint32_t>(d32); | |
| 85 | } | |
| 86 | ||
| 87 | } // namespace JSC |