/src/mozilla-central/dom/xslt/xpath/txNumberResult.cpp
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1 | | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
2 | | /* This Source Code Form is subject to the terms of the Mozilla Public |
3 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
4 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
5 | | |
6 | | /** |
7 | | * NumberResult |
8 | | * Represents the a number as the result of evaluating an Expr |
9 | | **/ |
10 | | |
11 | | #include "mozilla/FloatingPoint.h" |
12 | | |
13 | | #include "txExprResult.h" |
14 | | |
15 | | /** |
16 | | * Default Constructor |
17 | | **/ |
18 | | |
19 | | /** |
20 | | * Creates a new NumberResult with the value of the given double parameter |
21 | | * @param dbl the double to use for initialization of this NumberResult's value |
22 | | **/ |
23 | | NumberResult::NumberResult(double aValue, txResultRecycler* aRecycler) |
24 | | : txAExprResult(aRecycler), value(aValue) |
25 | 0 | { |
26 | 0 | } //-- NumberResult |
27 | | |
28 | | /* |
29 | | * Virtual Methods from ExprResult |
30 | | */ |
31 | | |
32 | 0 | short NumberResult::getResultType() { |
33 | 0 | return txAExprResult::NUMBER; |
34 | 0 | } //-- getResultType |
35 | | |
36 | | void |
37 | | NumberResult::stringValue(nsString& aResult) |
38 | 0 | { |
39 | 0 | txDouble::toString(value, aResult); |
40 | 0 | } |
41 | | |
42 | | const nsString* |
43 | | NumberResult::stringValuePointer() |
44 | 0 | { |
45 | 0 | return nullptr; |
46 | 0 | } |
47 | | |
48 | 0 | bool NumberResult::booleanValue() { |
49 | 0 | // OG+ |
50 | 0 | // As per the XPath spec, the boolean value of a number is true if and only if |
51 | 0 | // it is neither positive 0 nor negative 0 nor NaN |
52 | 0 | return (bool)(value != 0.0 && !mozilla::IsNaN(value)); |
53 | 0 | // OG- |
54 | 0 | } //-- booleanValue |
55 | | |
56 | 0 | double NumberResult::numberValue() { |
57 | 0 | return this->value; |
58 | 0 | } //-- numberValue |
59 | | |