private int makeAvailable()

in commons-fileupload2-core/src/main/java/org/apache/commons/fileupload2/core/MultipartInput.java [320:354]

• 25 lines of code
• 7 McCabe index (conditional complexity)

        private int makeAvailable() throws IOException {
            if (pos != -1) {
                return 0;
            }

            // Move the data to the beginning of the buffer.
            total += tail - head - pad;
            System.arraycopy(buffer, tail - pad, buffer, 0, pad);

            // Refill buffer with new data.
            head = 0;
            tail = pad;

            for (;;) {
                final var bytesRead = input.read(buffer, tail, bufSize - tail);
                if (bytesRead == -1) {
                    // The last pad amount is left in the buffer.
                    // Boundary can't be in there so signal an error
                    // condition.
                    final var msg = "Stream ended unexpectedly";
                    throw new MalformedStreamException(msg);
                }
                if (notifier != null) {
                    notifier.noteBytesRead(bytesRead);
                }
                tail += bytesRead;

                findSeparator();
                final var av = available();

                if (av > 0 || pos != -1) {
                    return av;
                }
            }
        }