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JSStringRef.cpp
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114 lines (97 loc) · 3.66 KB
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/*
* Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "JSStringRef.h"
#include "JSStringRefPrivate.h"
#include "InitializeThreading.h"
#include "OpaqueJSString.h"
#include <wtf/unicode/UTF8Conversion.h>
using namespace JSC;
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
JSStringRef JSStringCreateWithCharacters(const JSChar* chars, size_t numChars)
{
JSC::initialize();
return &OpaqueJSString::create({ reinterpret_cast<const char16_t*>(chars), numChars }).leakRef();
}
JSStringRef JSStringCreateWithUTF8CString(const char* string)
{
JSC::initialize();
if (auto result = OpaqueJSString::tryCreate(byteCast<char8_t>(unsafeSpan(string))))
return result.leakRef();
return &OpaqueJSString::create().leakRef();
}
JSStringRef JSStringCreateWithCharactersNoCopy(const JSChar* chars, size_t numChars)
{
JSC::initialize();
return OpaqueJSString::tryCreate(StringImpl::createWithoutCopying({ reinterpret_cast<const char16_t*>(chars), numChars })).leakRef();
}
JSStringRef JSStringRetain(JSStringRef string)
{
string->ref();
return string;
}
void JSStringRelease(JSStringRef string)
{
string->deref();
}
size_t JSStringGetLength(JSStringRef string)
{
if (!string)
return 0;
return string->length();
}
const JSChar* JSStringGetCharactersPtr(JSStringRef string)
{
if (!string)
return nullptr;
return reinterpret_cast<const JSChar*>(string->characters());
}
size_t JSStringGetMaximumUTF8CStringSize(JSStringRef string)
{
// Any UTF8 character > 3 bytes encodes as a UTF16 surrogate pair.
return string->length() * 3 + 1; // + 1 for terminating '\0'
}
size_t JSStringGetUTF8CString(JSStringRef string, char* buffer, size_t bufferSize)
{
if (!string || !buffer || !bufferSize)
return 0;
std::span<char8_t> target { byteCast<char8_t>(buffer), bufferSize - 1 };
WTF::Unicode::ConversionResult<char8_t> result;
if (string->is8Bit())
result = WTF::Unicode::convert(string->span8(), target);
else
result = WTF::Unicode::convert(string->span16(), target);
buffer[result.buffer.size()] = '\0';
return result.buffer.size() + 1;
}
bool JSStringIsEqual(JSStringRef a, JSStringRef b)
{
return OpaqueJSString::equal(a, b);
}
bool JSStringIsEqualToUTF8CString(JSStringRef a, const char* b)
{
return JSStringIsEqual(a, adoptRef(JSStringCreateWithUTF8CString(b)).get());
}
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END