erase() [1/3]

basic_string & fl::basic_string::erase	(	fl::size	pos = 0,
		fl::size	count = npos )

Definition at line 897 of file basic_string.cpp.hpp.

                                                          {
    if (pos >= mLength) return *this;
 
    fl::size actualCount = count;
    if (actualCount == npos || pos + actualCount > mLength) {
        actualCount = mLength - pos;
    }
    if (actualCount == 0) return *this;
 
    // Handle COW
    if (hasHeapData() && heapData().get().use_count() > 1) {
        const NotNullStringHolderPtr& heap = heapData();
        NotNullStringHolderPtr newData = NotNullStringHolderPtr(fl::make_shared<StringHolder>(mLength - actualCount));
        if (pos > 0) fl::memcpy(newData->data(), heap->data(), pos);
        fl::size remainingLen = mLength - pos - actualCount;
        if (remainingLen > 0) {
            fl::memcpy(newData->data() + pos, heap->data() + pos + actualCount, remainingLen);
        }
        mLength = mLength - actualCount;
        newData->data()[mLength] = '\0';
        mStorage = newData;
        return *this;
    }
 
    fl::size remainingLen = mLength - pos - actualCount;
    if (remainingLen > 0) {
        char* data = c_str_mutable();
        fl::memmove(data + pos, data + pos + actualCount, remainingLen);
    }
    mLength -= actualCount;
    c_str_mutable()[mLength] = '\0';
    return *this;
}

References basic_string(), c_str_mutable(), data(), fl::get(), hasHeapData(), heapData(), fl::make_shared(), fl::memcpy(), fl::memmove(), mLength, mStorage, npos, and pos.

Referenced by erase(), erase(), replace(), replace(), and replace().

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