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 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 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#include "JSStringRefPrivate.h"
29
30#include "InitializeThreading.h"
31#include "OpaqueJSString.h"
32#include <wtf/unicode/UTF8Conversion.h>
33
34using namespace JSC;
35using namespace WTF::Unicode;
36
37JSStringRef JSStringCreateWithCharacters(const JSChar* chars, size_t numChars)
38{
39 initializeThreading();
40 return &OpaqueJSString::create(reinterpret_cast<const UChar*>(chars), numChars).leakRef();
41}
42
43JSStringRef JSStringCreateWithUTF8CString(const char* string)
44{
45 initializeThreading();
46 if (string) {
47 size_t length = strlen(string);
48 Vector<UChar, 1024> buffer(length);
49 UChar* p = buffer.data();
50 bool sourceIsAllASCII;
51 const LChar* stringStart = reinterpret_cast<const LChar*>(string);
52 if (convertUTF8ToUTF16(string, string + length, &p, p + length, &sourceIsAllASCII)) {
53 if (sourceIsAllASCII)
54 return &OpaqueJSString::create(stringStart, length).leakRef();
55 return &OpaqueJSString::create(buffer.data(), p - buffer.data()).leakRef();
56 }
57 }
58
59 return &OpaqueJSString::create().leakRef();
60}
61
62JSStringRef JSStringCreateWithCharactersNoCopy(const JSChar* chars, size_t numChars)
63{
64 initializeThreading();
65 return OpaqueJSString::tryCreate(StringImpl::createWithoutCopying(reinterpret_cast<const UChar*>(chars), numChars)).leakRef();
66}
67
68JSStringRef JSStringRetain(JSStringRef string)
69{
70 string->ref();
71 return string;
72}
73
74void JSStringRelease(JSStringRef string)
75{
76 string->deref();
77}
78
79size_t JSStringGetLength(JSStringRef string)
80{
81 if (!string)
82 return 0;
83 return string->length();
84}
85
86const JSChar* JSStringGetCharactersPtr(JSStringRef string)
87{
88 if (!string)
89 return nullptr;
90 return reinterpret_cast<const JSChar*>(string->characters());
91}
92
93size_t JSStringGetMaximumUTF8CStringSize(JSStringRef string)
94{
95 // Any UTF8 character > 3 bytes encodes as a UTF16 surrogate pair.
96 return string->length() * 3 + 1; // + 1 for terminating '\0'
97}
98
99size_t JSStringGetUTF8CString(JSStringRef string, char* buffer, size_t bufferSize)
100{
101 if (!string || !buffer || !bufferSize)
102 return 0;
103
104 char* destination = buffer;
105 bool failed = false;
106 if (string->is8Bit()) {
107 const LChar* source = string->characters8();
108 convertLatin1ToUTF8(&source, source + string->length(), &destination, destination + bufferSize - 1);
109 } else {
110 const UChar* source = string->characters16();
111 auto result = convertUTF16ToUTF8(&source, source + string->length(), &destination, destination + bufferSize - 1);
112 failed = result != ConversionOK && result != TargetExhausted;
113 }
114
115 *destination++ = '\0';
116 return failed ? 0 : destination - buffer;
117}
118
119bool JSStringIsEqual(JSStringRef a, JSStringRef b)
120{
121 return OpaqueJSString::equal(a, b);
122}
123
124bool JSStringIsEqualToUTF8CString(JSStringRef a, const char* b)
125{
126 return JSStringIsEqual(a, adoptRef(JSStringCreateWithUTF8CString(b)).get());
127}
128