1/*
2 * Copyright (C) 2009 Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "WebCString.h"
33
34#include "TextEncoding.h"
35#include <wtf/text/CString.h>
36
37#include "WebString.h"
38
39namespace WebKit {
40
41class WebCStringPrivate : public WTF::CStringBuffer {
42};
43
44int WebCString::compare(const WebCString& other) const
45{
46    // A null string is always less than a non null one.
47    if (isNull() != other.isNull())
48        return isNull() ? -1 : 1;
49
50    if (isNull())
51        return 0; // Both WebStrings are null.
52
53    return strcmp(m_private->data(), other.m_private->data());
54}
55
56void WebCString::reset()
57{
58    if (m_private) {
59        m_private->deref();
60        m_private = 0;
61    }
62}
63
64void WebCString::assign(const WebCString& other)
65{
66    assign(const_cast<WebCStringPrivate*>(other.m_private));
67}
68
69void WebCString::assign(const char* data, size_t length)
70{
71    char* newData;
72    RefPtr<WTF::CStringBuffer> buffer =
73        WTF::CString::newUninitialized(length, newData).buffer();
74    memcpy(newData, data, length);
75    assign(static_cast<WebCStringPrivate*>(buffer.get()));
76}
77
78size_t WebCString::length() const
79{
80    if (!m_private)
81        return 0;
82    // NOTE: The buffer's length includes the null byte.
83    return const_cast<WebCStringPrivate*>(m_private)->length() - 1;
84}
85
86const char* WebCString::data() const
87{
88    if (!m_private)
89        return 0;
90    return const_cast<WebCStringPrivate*>(m_private)->data();
91}
92
93WebString WebCString::utf16() const
94{
95    return WebCore::UTF8Encoding().decode(data(), length());
96}
97
98WebCString WebCString::fromUTF16(const WebUChar* data, size_t length)
99{
100    return WebCore::UTF8Encoding().encode(
101        data, length, WebCore::QuestionMarksForUnencodables);
102}
103
104WebCString WebCString::fromUTF16(const WebUChar* data)
105{
106    size_t len = 0;
107    while (data[len] != WebUChar(0))
108        len++;
109    return fromUTF16(data, len);
110}
111
112WebCString::WebCString(const WTF::CString& s)
113    : m_private(static_cast<WebCStringPrivate*>(s.buffer()))
114{
115    if (m_private)
116        m_private->ref();
117}
118
119WebCString& WebCString::operator=(const WTF::CString& s)
120{
121    assign(static_cast<WebCStringPrivate*>(s.buffer()));
122    return *this;
123}
124
125WebCString::operator WTF::CString() const
126{
127    return m_private;
128}
129
130void WebCString::assign(WebCStringPrivate* p)
131{
132    // Take care to handle the case where m_private == p
133    if (p)
134        p->ref();
135    if (m_private)
136        m_private->deref();
137    m_private = p;
138}
139
140} // namespace WebKit
141