private void FillBuff()

in velocity-engine-core/src/main/java/org/apache/velocity/runtime/parser/VelocityCharStream.java [119:182]

63 lines of code
11 McCabe index (conditional complexity)


    private void FillBuff() throws java.io.IOException
    {
        if (maxNextCharInd == available)
        {
            if (available == bufsize)
            {
                if (tokenBegin > nextBufExpand)
                {
                    bufpos = maxNextCharInd = 0;
                    available = tokenBegin;
                }
                else if (tokenBegin < 0)
                {
                    bufpos = maxNextCharInd = 0;
                }
                else
                {
                    ExpandBuff(false);
                }
            }
            else if (available > tokenBegin)
            {
                available = bufsize;
            }
            else if ((tokenBegin - available) < nextBufExpand)
            {
                ExpandBuff(true);
            }
            else
            {
                available = tokenBegin;
            }
        }

        int i;
        try
        {
            if ((i = inputStream.read(buffer, maxNextCharInd,
                    available - maxNextCharInd)) == -1)
            {
                if (beforeEOF)
                {
                    inputStream.close();
                    throw new java.io.IOException();
                }
                buffer[maxNextCharInd++] = END_OF_FILE;
                beforeEOF = true;
            }
            else
            {
                maxNextCharInd += i;
            }
        }
        catch(java.io.IOException e)
        {
            --bufpos;
            backup(0);
            if (tokenBegin == -1)
            {
                tokenBegin = bufpos;
            }
            throw e;
        }
    }