Method joinIntoString

JUCE/modules/juce_core/text/juce_StringArray.cpp:293–331

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String StringArray::joinIntoString (StringRef separator, int start, int numberToJoin) const
{
    auto last = (numberToJoin < 0) ? size()
                                   : jmin (size(), start + numberToJoin);

    if (start < 0)
        start = 0;

    if (start >= last)
        return {};

    if (start == last - 1)
        return strings.getReference (start);

    auto separatorBytes = separator.text.sizeInBytes() - sizeof (String::CharPointerType::CharType);
    auto bytesNeeded = (size_t) (last - start - 1) * separatorBytes;

    for (int i = start; i < last; ++i)
        bytesNeeded += strings.getReference(i).getCharPointer().sizeInBytes() - sizeof (String::CharPointerType::CharType);

    String result;
    result.preallocateBytes (bytesNeeded);

    auto dest = result.getCharPointer();

    while (start < last)
    {
        auto& s = strings.getReference (start);

        if (! s.isEmpty())
            dest.writeAll (s.getCharPointer());

        if (++start < last && separatorBytes > 0)
            dest.writeAll (separator.text);
    }

    dest.writeNull();
    return result;
}

int StringArray::addTokens (StringRef text, const bool preserveQuotedStrings)
{