1 /*
2 * Copyright (C) 2003, 2006, 2008, 2009 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26
27 #include "config.h"
28 #include "CString.h"
29
30 using std::min;
31
32 namespace WebCore {
33
CString(const char * str)34 CString::CString(const char* str)
35 {
36 init(str, strlen(str));
37 }
38
CString(const char * str,unsigned length)39 CString::CString(const char* str, unsigned length)
40 {
41 init(str, length);
42 }
43
init(const char * str,unsigned length)44 void CString::init(const char* str, unsigned length)
45 {
46 if (!str)
47 return;
48
49 m_buffer = CStringBuffer::create(length + 1);
50 memcpy(m_buffer->mutableData(), str, length);
51 m_buffer->mutableData()[length] = '\0';
52 }
53
data() const54 const char* CString::data() const
55 {
56 return m_buffer ? m_buffer->data() : 0;
57 }
58
mutableData()59 char* CString::mutableData()
60 {
61 copyBufferIfNeeded();
62 if (!m_buffer)
63 return 0;
64 return m_buffer->mutableData();
65 }
66
length() const67 unsigned CString::length() const
68 {
69 return m_buffer ? m_buffer->length() - 1 : 0;
70 }
71
newUninitialized(size_t length,char * & characterBuffer)72 CString CString::newUninitialized(size_t length, char*& characterBuffer)
73 {
74 CString result;
75 result.m_buffer = CStringBuffer::create(length + 1);
76 char* bytes = result.m_buffer->mutableData();
77 bytes[length] = '\0';
78 characterBuffer = bytes;
79 return result;
80 }
81
copyBufferIfNeeded()82 void CString::copyBufferIfNeeded()
83 {
84 if (!m_buffer || m_buffer->hasOneRef())
85 return;
86
87 int len = m_buffer->length();
88 RefPtr<CStringBuffer> m_temp = m_buffer;
89 m_buffer = CStringBuffer::create(len);
90 memcpy(m_buffer->mutableData(), m_temp->data(), len);
91 }
92
operator ==(const CString & a,const CString & b)93 bool operator==(const CString& a, const CString& b)
94 {
95 if (a.isNull() != b.isNull())
96 return false;
97 if (a.length() != b.length())
98 return false;
99 return !strncmp(a.data(), b.data(), min(a.length(), b.length()));
100 }
101
102 } // namespace WebCore
103