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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "wtf/text/StringView.h" | |
6 | |
7 #include "wtf/text/StringImpl.h" | |
8 #include "wtf/text/WTFString.h" | |
9 | |
10 namespace WTF { | |
11 | |
12 StringView::StringView(const UChar* chars, unsigned length) | |
13 : m_length(length) | |
14 , m_is8Bit(false) | |
15 { | |
16 SECURITY_DCHECK(!chars || length <= lengthOfNullTerminatedString(chars)); | |
17 m_data.characters16 = chars; | |
18 } | |
19 | |
20 StringView::StringView(const UChar* chars) | |
21 : StringView(chars, chars ? lengthOfNullTerminatedString(chars) : 0) {} | |
22 | |
23 String StringView::toString() const | |
24 { | |
25 if (!m_data.bytes) | |
haraken
2016/05/26 22:27:22
isNull()
esprehn
2016/05/26 22:40:21
done, also added a case for empty strings.
| |
26 return String(); | |
27 if (is8Bit()) | |
28 return String(m_data.characters8, m_length); | |
29 return String(m_data.characters16, m_length); | |
30 } | |
31 | |
32 bool equalStringView(const StringView& a, const StringView& b) | |
33 { | |
34 if (a.length() != b.length()) | |
35 return false; | |
36 if (a.isNull() || b.isNull()) | |
37 return a.isNull() == b.isNull(); | |
haraken
2016/05/26 22:27:22
A better check would be:
if (a.length() == 0 ||
esprehn
2016/05/26 22:40:21
Yeah, checking isEmpty() works here.
| |
38 if (a.is8Bit()) { | |
39 if (b.is8Bit()) | |
40 return WTF::equal(a.characters8(), b.characters8(), a.length()); | |
41 return WTF::equal(a.characters8(), b.characters16(), a.length()); | |
42 } | |
43 if (b.is8Bit()) | |
44 return WTF::equal(a.characters16(), b.characters8(), a.length()); | |
45 return WTF::equal(a.characters16(), b.characters16(), a.length()); | |
46 } | |
47 | |
48 } // namespace WTF | |
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