1/*
2 * Copyright (C) 2006, 2007 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#include "config.h"
27#include "JSStringRef.h"
28
29#include "InitializeThreading.h"
30#include "OpaqueJSString.h"
31#include <wtf/unicode/UTF8.h>
32
33using namespace JSC;
34using namespace WTF::Unicode;
35
36JSStringRef JSStringCreateWithCharacters(const JSChar* chars, size_t numChars)
37{
38    initializeThreading();
39    return OpaqueJSString::create(chars, numChars).leakRef();
40}
41
42JSStringRef JSStringCreateWithUTF8CString(const char* string)
43{
44    initializeThreading();
45    if (string) {
46        size_t length = strlen(string);
47        Vector<UChar, 1024> buffer(length);
48        UChar* p = buffer.data();
49        if (conversionOK == convertUTF8ToUTF16(&string, string + length, &p, p + length))
50            return OpaqueJSString::create(buffer.data(), p - buffer.data()).leakRef();
51    }
52
53    // Null string.
54    return OpaqueJSString::create().leakRef();
55}
56
57JSStringRef JSStringRetain(JSStringRef string)
58{
59    string->ref();
60    return string;
61}
62
63void JSStringRelease(JSStringRef string)
64{
65    string->deref();
66}
67
68size_t JSStringGetLength(JSStringRef string)
69{
70    return string->length();
71}
72
73const JSChar* JSStringGetCharactersPtr(JSStringRef string)
74{
75    return string->characters();
76}
77
78size_t JSStringGetMaximumUTF8CStringSize(JSStringRef string)
79{
80    // Any UTF8 character > 3 bytes encodes as a UTF16 surrogate pair.
81    return string->length() * 3 + 1; // + 1 for terminating '\0'
82}
83
84size_t JSStringGetUTF8CString(JSStringRef string, char* buffer, size_t bufferSize)
85{
86    if (!bufferSize)
87        return 0;
88
89    char* p = buffer;
90    const UChar* d = string->characters();
91    ConversionResult result = convertUTF16ToUTF8(&d, d + string->length(), &p, p + bufferSize - 1, true);
92    *p++ = '\0';
93    if (result != conversionOK && result != targetExhausted)
94        return 0;
95
96    return p - buffer;
97}
98
99bool JSStringIsEqual(JSStringRef a, JSStringRef b)
100{
101    unsigned len = a->length();
102    return len == b->length() && 0 == memcmp(a->characters(), b->characters(), len * sizeof(UChar));
103}
104
105bool JSStringIsEqualToUTF8CString(JSStringRef a, const char* b)
106{
107    JSStringRef bBuf = JSStringCreateWithUTF8CString(b);
108    bool result = JSStringIsEqual(a, bBuf);
109    JSStringRelease(bBuf);
110
111    return result;
112}
113