Simple pointer question

Hi all.

I am receiving serial data and placing it into a buffer.
In main I am using a pointer to view the elements of the buffer.

Code:

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                volatile char *pointer;       
                pointer = pc_rx_buffer;

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I work my way through the buffer using

Code:

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                pointer++;

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If the buffer created is,

Code:

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                pc_rx_buffer[PC_Rx_BUFFER_SIZE])

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What is the correct way to test whether my pointer is at the last element of my buffer, so that I can reset my pointer to the beginning of my buffer?

Im sure this is quite simple, but I'm through with scratching my head about this so I thought i would just ask.

Thanks

One way:

Code:

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      if ( pointer >= pc_rx_buffer + sizeof pc_rx_buffer )
      {
        pointer = pc_rx_buffer;
      }

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Thanks Dave,

Thats pretty much what I was heading towards.

I just thought that it was a bit messy. Logically that is the equivalent of what I need to do.