Beispiel #1
0
NEVER_INLINE unsigned StringImpl::hashSlowCase() const {
  if (is8Bit())
    setHash(StringHasher::computeHashAndMaskTop8Bits(characters8(), m_length));
  else
    setHash(StringHasher::computeHashAndMaskTop8Bits(characters16(), m_length));
  return existingHash();
}
void String::append(const UChar* charactersToAppend, unsigned lengthToAppend)
{
    if (!m_impl) {
        if (!charactersToAppend)
            return;
        m_impl = StringImpl::create(charactersToAppend, lengthToAppend);
        return;
    }

    if (!lengthToAppend)
        return;

    unsigned strLength = m_impl->length();

    ASSERT(charactersToAppend);
    RELEASE_ASSERT(lengthToAppend <= std::numeric_limits<unsigned>::max() - strLength);
    UChar* data;
    RefPtr<StringImpl> newImpl = StringImpl::createUninitialized(strLength + lengthToAppend, data);
    if (m_impl->is8Bit())
        StringImpl::copyChars(data, characters8(), strLength);
    else
        StringImpl::copyChars(data, characters16(), strLength);
    StringImpl::copyChars(data + strLength, charactersToAppend, lengthToAppend);
    m_impl = newImpl.release();
}
unsigned String::copyTo(UChar* buffer, unsigned pos, unsigned maxLength) const
{
    unsigned length = this->length();
    RELEASE_ASSERT(pos <= length);
    unsigned numCharacters = std::min(length - pos, maxLength);
    if (!numCharacters)
        return 0;
    if (is8Bit())
        StringImpl::copyChars(buffer, characters8() + pos, numCharacters);
    else
        StringImpl::copyChars(buffer, characters16() + pos, numCharacters);
    return numCharacters;
}
void String::remove(unsigned position, int lengthToRemove)
{
    if (lengthToRemove <= 0)
        return;
    if (position >= length())
        return;
    if (static_cast<unsigned>(lengthToRemove) > length() - position)
        lengthToRemove = length() - position;

    if (is8Bit()) {
        removeInternal(characters8(), position, lengthToRemove);

        return;
    }

    removeInternal(characters16(), position, lengthToRemove);
}
Beispiel #5
0
RetainPtr<CFStringRef> StringImpl::createCFString()
{
    // Since garbage collection isn't compatible with custom allocators, we
    // can't use the NoCopy variants of CFStringCreate*() when GC is enabled.
    if (!m_length || !isMainThread() || garbageCollectionEnabled()) {
        if (is8Bit())
            return adoptCF(CFStringCreateWithBytes(0, reinterpret_cast<const UInt8*>(characters8()), m_length, kCFStringEncodingISOLatin1, false));
        return adoptCF(CFStringCreateWithCharacters(0, reinterpret_cast<const UniChar*>(characters16()), m_length));
    }
    CFAllocatorRef allocator = StringWrapperCFAllocator::allocator();

    // Put pointer to the StringImpl in a global so the allocator can store it with the CFString.
    ASSERT(!StringWrapperCFAllocator::currentString);
    StringWrapperCFAllocator::currentString = this;

    CFStringRef string;
    if (is8Bit())
        string = CFStringCreateWithBytesNoCopy(allocator, reinterpret_cast<const UInt8*>(characters8()), m_length, kCFStringEncodingISOLatin1, false, kCFAllocatorNull);
    else
        string = CFStringCreateWithCharactersNoCopy(allocator, reinterpret_cast<const UniChar*>(characters16()), m_length, kCFAllocatorNull);
    // CoreFoundation might not have to allocate anything, we clear currentString in case we did not execute allocate().
    StringWrapperCFAllocator::currentString = 0;

    return adoptCF(string);
}