bigloo.foreign.rgc_buffer_reserve_space C# (CSharp) Method

        private static void rgc_buffer_reserve_space(input_port p, int amount)
        {
            int bufsize = p.bufsiz;
            int bufpos = p.bufpos;
            int matchstop = p.matchstop;

            if ( matchstop >= amount ) return;

            if ( (matchstop + (bufsize - (bufpos-1))) >= amount ) {
               // shift the buffer to the right
               int diff = amount - matchstop;

               bcopy( p.buffer, matchstop, p.buffer, amount, bufpos-1 - matchstop);

               p.bufpos += diff;
               p.matchstop += diff;
            } else {
               p.rgc_double_buffer();
               rgc_buffer_reserve_space(p, amount);
            }
        }