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qv4value.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Contact: https://www.qt.io/licensing/-
5**-
6** This file is part of the QtQml module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL$-
9** Commercial License Usage-
10** Licensees holding valid commercial Qt licenses may use this file in-
11** accordance with the commercial license agreement provided with the-
12** Software or, alternatively, in accordance with the terms contained in-
13** a written agreement between you and The Qt Company. For licensing terms-
14** and conditions see https://www.qt.io/terms-conditions. For further-
15** information use the contact form at https://www.qt.io/contact-us.-
16**-
17** GNU Lesser General Public License Usage-
18** Alternatively, this file may be used under the terms of the GNU Lesser-
19** General Public License version 3 as published by the Free Software-
20** Foundation and appearing in the file LICENSE.LGPL3 included in the-
21** packaging of this file. Please review the following information to-
22** ensure the GNU Lesser General Public License version 3 requirements-
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.-
24**-
25** GNU General Public License Usage-
26** Alternatively, this file may be used under the terms of the GNU-
27** General Public License version 2.0 or (at your option) the GNU General-
28** Public license version 3 or any later version approved by the KDE Free-
29** Qt Foundation. The licenses are as published by the Free Software-
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3-
31** included in the packaging of this file. Please review the following-
32** information to ensure the GNU General Public License requirements will-
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and-
34** https://www.gnu.org/licenses/gpl-3.0.html.-
35**-
36** $QT_END_LICENSE$-
37**-
38****************************************************************************/-
39#include <qv4engine_p.h>-
40#include <qv4runtime_p.h>-
41#include <qv4string_p.h>-
42#include <qv4propertykey_p.h>-
43#ifndef V4_BOOTSTRAP-
44#include <qv4symbol_p.h>-
45#include <qv4object_p.h>-
46#include <qv4objectproto_p.h>-
47#include <private/qv4mm_p.h>-
48#endif-
49-
50#include <wtf/MathExtras.h>-
51-
52using namespace QV4;-
53-
54int Value::toUInt16() const-
55{-
56 if (integerCompatible())
integerCompatible()Description
TRUEnever evaluated
FALSEnever evaluated
0
57 return (ushort)(uint)integerValue();
never executed: return (ushort)(uint)integerValue();
0
58-
59 double number = toNumber();-
60-
61 double D16 = 65536.0;-
62 if ((number >= 0 && number < D16))
number >= 0Description
TRUEnever evaluated
FALSEnever evaluated
number < D16Description
TRUEnever evaluated
FALSEnever evaluated
0
63 return static_cast<ushort>(number);
never executed: return static_cast<ushort>(number);
0
64-
65 if (!std::isfinite(number))
!std::isfinite(number)Description
TRUEnever evaluated
FALSEnever evaluated
0
66 return +0;
never executed: return +0;
0
67-
68 double d = ::floor(::fabs(number));-
69 if (std::signbit(number))
std::signbit(number)Description
TRUEnever evaluated
FALSEnever evaluated
0
70 d = -d;
never executed: d = -d;
0
71-
72 number = ::fmod(d , D16);-
73-
74 if (number < 0)
number < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
75 number += D16;
never executed: number += D16;
0
76-
77 return (unsigned short)number;
never executed: return (unsigned short)number;
0
78}-
79-
80bool Value::toBooleanImpl(Value val)-
81{-
82 if (val.isManagedOrUndefined()) {
val.isManagedOrUndefined()Description
TRUEnever evaluated
FALSEnever evaluated
0
83 Heap::Base *b = val.m();-
84 if (!b)
!bDescription
TRUEnever evaluated
FALSEnever evaluated
0
85 return false;
never executed: return false;
0
86#ifdef V4_BOOTSTRAP-
87 Q_UNIMPLEMENTED();-
88#else-
89 if (b->internalClass->vtable->isString)-
90 return static_cast<Heap::String *>(b)->length() > 0;-
91#endif-
92 return true;
never executed: return true;
0
93 }-
94-
95 // double-
96 double d = val.doubleValue();-
97 return d && !std::isnan(d);
never executed: return d && !std::isnan(d);
0
98}-
99-
100double Value::toNumberImpl(Value val)-
101{-
102 switch (val.type()) {-
103 case QV4::Value::Undefined_Type:
never executed: case QV4::Value::Undefined_Type:
0
104 return std::numeric_limits<double>::quiet_NaN();
never executed: return std::numeric_limits<double>::quiet_NaN();
0
105 case QV4::Value::Managed_Type:
never executed: case QV4::Value::Managed_Type:
0
106#ifdef V4_BOOTSTRAP-
107 Q_UNIMPLEMENTED();-
108 Q_FALLTHROUGH();-
109#else-
110 if (String *s = val.stringValue())-
111 return RuntimeHelpers::stringToNumber(s->toQString());-
112 if (val.isSymbol()) {-
113 Managed &m = static_cast<Managed &>(val);-
114 m.engine()->throwTypeError();-
115 return 0;-
116 }-
117 {-
118 Q_ASSERT(val.isObject());-
119 Scope scope(val.objectValue()->engine());-
120 ScopedValue protectThis(scope, val);-
121 ScopedValue prim(scope, RuntimeHelpers::toPrimitive(val, NUMBER_HINT));-
122 if (scope.engine->hasException)-
123 return 0;-
124 return prim->toNumber();-
125 }-
126#endif-
127 case QV4::Value::Null_Type:
code before this statement never executed: case QV4::Value::Null_Type:
never executed: case QV4::Value::Null_Type:
0
128 case QV4::Value::Boolean_Type:
never executed: case QV4::Value::Boolean_Type:
0
129 case QV4::Value::Integer_Type:
never executed: case QV4::Value::Integer_Type:
0
130 return val.int_32();
never executed: return val.int_32();
0
131 default: // double
never executed: default:
0
132 Q_UNREACHABLE();-
133 }
never executed: end of block
0
134}-
135-
136#ifndef V4_BOOTSTRAP-
137QString Value::toQStringNoThrow() const-
138{-
139 switch (type()) {-
140 case Value::Empty_Type:-
141 Q_ASSERT(!"empty Value encountered");-
142 Q_UNREACHABLE();-
143 case Value::Undefined_Type:-
144 return QStringLiteral("undefined");-
145 case Value::Null_Type:-
146 return QStringLiteral("null");-
147 case Value::Boolean_Type:-
148 if (booleanValue())-
149 return QStringLiteral("true");-
150 else-
151 return QStringLiteral("false");-
152 case Value::Managed_Type:-
153 if (String *s = stringValue())-
154 return s->toQString();-
155 if (Symbol *s = symbolValue())-
156 return s->descriptiveString();-
157 {-
158 Q_ASSERT(isObject());-
159 Scope scope(objectValue()->engine());-
160 ScopedValue ex(scope);-
161 bool caughtException = false;-
162 ScopedValue prim(scope, RuntimeHelpers::toPrimitive(*this, STRING_HINT));-
163 if (scope.hasException()) {-
164 ex = scope.engine->catchException();-
165 caughtException = true;-
166 } else if (prim->isPrimitive()) {-
167 return prim->toQStringNoThrow();-
168 }-
169 // Can't nest try/catch due to CXX ABI limitations for foreign exception nesting.-
170 if (caughtException) {-
171 ScopedValue prim(scope, RuntimeHelpers::toPrimitive(ex, STRING_HINT));-
172 if (scope.hasException()) {-
173 ex = scope.engine->catchException();-
174 } else if (prim->isPrimitive()) {-
175 return prim->toQStringNoThrow();-
176 }-
177 }-
178 return QString();-
179 }-
180 case Value::Integer_Type: {-
181 QString str;-
182 RuntimeHelpers::numberToString(&str, (double)int_32(), 10);-
183 return str;-
184 }-
185 default: { // double-
186 QString str;-
187 RuntimeHelpers::numberToString(&str, doubleValue(), 10);-
188 return str;-
189 }-
190 } // switch-
191}-
192-
193QString Value::toQString() const-
194{-
195 switch (type()) {-
196 case Value::Empty_Type:-
197 Q_ASSERT(!"empty Value encountered");-
198 Q_UNREACHABLE();-
199 case Value::Undefined_Type:-
200 return QStringLiteral("undefined");-
201 case Value::Null_Type:-
202 return QStringLiteral("null");-
203 case Value::Boolean_Type:-
204 if (booleanValue())-
205 return QStringLiteral("true");-
206 else-
207 return QStringLiteral("false");-
208 case Value::Managed_Type:-
209 if (String *s = stringValue()) {-
210 return s->toQString();-
211 } else if (isSymbol()) {-
212 static_cast<const Managed *>(this)->engine()->throwTypeError();-
213 return QString();-
214 } else {-
215 Q_ASSERT(isObject());-
216 Scope scope(objectValue()->engine());-
217 ScopedValue prim(scope, RuntimeHelpers::toPrimitive(*this, STRING_HINT));-
218 return prim->toQString();-
219 }-
220 case Value::Integer_Type: {-
221 QString str;-
222 RuntimeHelpers::numberToString(&str, (double)int_32(), 10);-
223 return str;-
224 }-
225 default: { // double-
226 QString str;-
227 RuntimeHelpers::numberToString(&str, doubleValue(), 10);-
228 return str;-
229 }-
230 } // switch-
231}-
232-
233QV4::PropertyKey Value::toPropertyKey(ExecutionEngine *e) const-
234{-
235 if (isInteger() && int_32() >= 0)-
236 return PropertyKey::fromArrayIndex(static_cast<uint>(int_32()));-
237 if (isStringOrSymbol()) {-
238 Scope scope(e);-
239 ScopedStringOrSymbol s(scope, this);-
240 return s->toPropertyKey();-
241 }-
242 Scope scope(e);-
243 ScopedValue v(scope, RuntimeHelpers::toPrimitive(*this, STRING_HINT));-
244 if (!v->isStringOrSymbol())-
245 v = v->toString(e);-
246 if (e->hasException)-
247 return PropertyKey::invalid();-
248 ScopedStringOrSymbol s(scope, v);-
249 return s->toPropertyKey();-
250}-
251#endif // V4_BOOTSTRAP-
252-
253bool Value::sameValue(Value other) const {-
254 if (_val == other._val)
_val == other._valDescription
TRUEnever evaluated
FALSEnever evaluated
0
255 return true;
never executed: return true;
0
256 String *s = stringValue();-
257 String *os = other.stringValue();-
258 if (s && os)
sDescription
TRUEnever evaluated
FALSEnever evaluated
osDescription
TRUEnever evaluated
FALSEnever evaluated
0
259 return s->isEqualTo(os);
never executed: return s->isEqualTo(os);
0
260 if (isInteger() && other.isDouble())
isInteger()Description
TRUEnever evaluated
FALSEnever evaluated
other.isDouble()Description
TRUEnever evaluated
FALSEnever evaluated
0
261 return int_32() ? (double(int_32()) == other.doubleValue())
never executed: return int_32() ? (double(int_32()) == other.doubleValue()) : (other.doubleValue() == 0 && !std::signbit(other.doubleValue()));
0
262 : (other.doubleValue() == 0 && !std::signbit(other.doubleValue()));
never executed: return int_32() ? (double(int_32()) == other.doubleValue()) : (other.doubleValue() == 0 && !std::signbit(other.doubleValue()));
0
263 if (isDouble() && other.isInteger())
isDouble()Description
TRUEnever evaluated
FALSEnever evaluated
other.isInteger()Description
TRUEnever evaluated
FALSEnever evaluated
0
264 return other.int_32() ? (doubleValue() == double(other.int_32()))
never executed: return other.int_32() ? (doubleValue() == double(other.int_32())) : (doubleValue() == 0 && !std::signbit(doubleValue()));
0
265 : (doubleValue() == 0 && !std::signbit(doubleValue()));
never executed: return other.int_32() ? (doubleValue() == double(other.int_32())) : (doubleValue() == 0 && !std::signbit(doubleValue()));
0
266 return false;
never executed: return false;
0
267}-
268-
269bool Value::sameValueZero(Value other) const {-
270 if (_val == other._val)
_val == other._valDescription
TRUEnever evaluated
FALSEnever evaluated
0
271 return true;
never executed: return true;
0
272 String *s = stringValue();-
273 String *os = other.stringValue();-
274 if (s && os)
sDescription
TRUEnever evaluated
FALSEnever evaluated
osDescription
TRUEnever evaluated
FALSEnever evaluated
0
275 return s->isEqualTo(os);
never executed: return s->isEqualTo(os);
0
276 if (isInteger() && other.isDouble())
isInteger()Description
TRUEnever evaluated
FALSEnever evaluated
other.isDouble()Description
TRUEnever evaluated
FALSEnever evaluated
0
277 return double(int_32()) == other.doubleValue();
never executed: return double(int_32()) == other.doubleValue();
0
278 if (isDouble() && other.isInteger())
isDouble()Description
TRUEnever evaluated
FALSEnever evaluated
other.isInteger()Description
TRUEnever evaluated
FALSEnever evaluated
0
279 return other.int_32() == doubleValue();
never executed: return other.int_32() == doubleValue();
0
280 if (isDouble() && other.isDouble()) {
isDouble()Description
TRUEnever evaluated
FALSEnever evaluated
other.isDouble()Description
TRUEnever evaluated
FALSEnever evaluated
0
281 if (doubleValue() == 0 && other.doubleValue() == 0) {
doubleValue() == 0Description
TRUEnever evaluated
FALSEnever evaluated
other.doubleValue() == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
282 return true;
never executed: return true;
0
283 }-
284 }
never executed: end of block
0
285 return false;
never executed: return false;
0
286}-
287-
288#ifndef V4_BOOTSTRAP-
289Heap::String *Value::toString(ExecutionEngine *e, Value val)-
290{-
291 return RuntimeHelpers::convertToString(e, val);-
292}-
293-
294Heap::Object *Value::toObject(ExecutionEngine *e, Value val)-
295{-
296 return RuntimeHelpers::convertToObject(e, val);-
297}-
298-
299uint Value::asArrayLength(bool *ok) const-
300{-
301 *ok = true;-
302 if (isInteger()) {-
303 if (int_32() >= 0) {-
304 return (uint)int_32();-
305 } else {-
306 *ok = false;-
307 return UINT_MAX;-
308 }-
309 }-
310 if (isNumber()) {-
311 double d = doubleValue();-
312 uint idx = (uint)d;-
313 if (idx != d) {-
314 *ok = false;-
315 return UINT_MAX;-
316 }-
317 return idx;-
318 }-
319 if (String *s = stringValue())-
320 return s->toUInt(ok);-
321-
322 uint idx = toUInt32();-
323 double d = toNumber();-
324 if (d != idx) {-
325 *ok = false;-
326 return UINT_MAX;-
327 }-
328 return idx;-
329}-
330#endif // V4_BOOTSTRAP-
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