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 | |
36 | JSStringRef JSStringCreateWithCharacters(const JSChar* chars, size_t numChars) |
37 | { |
38 | initializeThreading(); |
39 | return OpaqueJSString::create(characters: chars, length: numChars).releaseRef(); |
40 | } |
41 | |
42 | JSStringRef 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 | |
57 | JSStringRef JSStringRetain(JSStringRef string) |
58 | { |
59 | string->ref(); |
60 | return string; |
61 | } |
62 | |
63 | void JSStringRelease(JSStringRef string) |
64 | { |
65 | string->deref(); |
66 | } |
67 | |
68 | size_t JSStringGetLength(JSStringRef string) |
69 | { |
70 | return string ? string->length() : 0; |
71 | } |
72 | |
73 | const JSChar* JSStringGetCharactersPtr(JSStringRef string) |
74 | { |
75 | return string ? string->characters() : nullptr; |
76 | } |
77 | |
78 | size_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 | |
84 | size_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 | |
102 | bool 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 | |
112 | bool 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 | |