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(characters: chars, length: numChars).releaseRef();
40}
41
42JSStringRef JSStringCreateWithUTF8CString(const char* string)
43{
44 initializeThreading();
45 if (string) {
46 size_t length = strlen(s: string);
47 Vector<UChar, 1024> buffer(length);
48 UChar* p = buffer.data();
49 if (conversionOK == convertUTF8ToUTF16(sourceStart: &string, sourceEnd: string + length, targetStart: &p, targetEnd: p + length))
50 return OpaqueJSString::create(characters: buffer.data(), length: p - buffer.data()).releaseRef();
51 }
52
53 // Null string.
54 return OpaqueJSString::create().releaseRef();
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 ? string->length() : 0;
71}
72
73const JSChar* JSStringGetCharactersPtr(JSStringRef string)
74{
75 return string ? string->characters() : nullptr;
76}
77
78size_t JSStringGetMaximumUTF8CStringSize(JSStringRef string)
79{
80 // Any UTF8 character > 3 bytes encodes as a UTF16 surrogate pair.
81 return string ? string->length() * 3 + 1 : 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 ConversionResult result = conversionOK;
91 if (string) {
92 const UChar* d = string->characters();
93 result = convertUTF16ToUTF8(sourceStart: &d, sourceEnd: d + string->length(), targetStart: &p, targetEnd: p + bufferSize - 1, strict: true);
94 }
95 *p++ = '\0';
96 if (result != conversionOK && result != targetExhausted)
97 return 0;
98
99 return p - buffer;
100}
101
102bool JSStringIsEqual(JSStringRef a, JSStringRef b)
103{
104 if (!a)
105 return (!b || b->length() == 0);
106 if (!b)
107 return (!a || a->length() == 0);
108 unsigned len = a->length();
109 return len == b->length() && 0 == memcmp(s1: a->characters(), s2: b->characters(), n: len * sizeof(UChar));
110}
111
112bool JSStringIsEqualToUTF8CString(JSStringRef a, const char* b)
113{
114 JSStringRef bBuf = JSStringCreateWithUTF8CString(string: b);
115 bool result = JSStringIsEqual(a, b: bBuf);
116 JSStringRelease(string: bBuf);
117
118 return result;
119}
120

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/API/JSStringRef.cpp