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
33 using namespace JSC;
34 using namespace WTF::Unicode;
35
JSStringCreateWithCharacters(const JSChar * chars,size_t numChars)36 JSStringRef JSStringCreateWithCharacters(const JSChar* chars, size_t numChars)
37 {
38 initializeThreading();
39 return OpaqueJSString::create(chars, numChars).leakRef();
40 }
41
JSStringCreateWithUTF8CString(const char * string)42 JSStringRef 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
JSStringRetain(JSStringRef string)57 JSStringRef JSStringRetain(JSStringRef string)
58 {
59 string->ref();
60 return string;
61 }
62
JSStringRelease(JSStringRef string)63 void JSStringRelease(JSStringRef string)
64 {
65 string->deref();
66 }
67
JSStringGetLength(JSStringRef string)68 size_t JSStringGetLength(JSStringRef string)
69 {
70 return string->length();
71 }
72
JSStringGetCharactersPtr(JSStringRef string)73 const JSChar* JSStringGetCharactersPtr(JSStringRef string)
74 {
75 return string->characters();
76 }
77
JSStringGetMaximumUTF8CStringSize(JSStringRef string)78 size_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
JSStringGetUTF8CString(JSStringRef string,char * buffer,size_t bufferSize)84 size_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
JSStringIsEqual(JSStringRef a,JSStringRef b)99 bool 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
JSStringIsEqualToUTF8CString(JSStringRef a,const char * b)105 bool 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