[En-Nut-Discussion] eboot, a tricky bit.

[Brett Abbott]

Hi

Ive almost completed the port to ICC of eboot but have found a segment 
of code that has stumped my self taught C programming skills.  Could I 
ask if someone could advise us of the appropriate ICC equivalent?

In particular, the line Im having trouble compiling is "sum += 
*((u_short *) data)++;"

Many Thanks, Any help appreciated.
Brett

from eboot\ip.c:

/*!
 * \brief Calculate the IP checksum over a block of data.
 *
 * \param data Pointer to the data block.
 * \param size Size of the data block.
 *
 * \return The checksum in network byte order.
 */
static u_short IpChkSum(const void *data, u_short size)
{
    register u_long sum = 0;

    for (;;) {
        if (size < 2)
            break;
        sum += *((u_short *) data)++;
        size -= 2;
    }
    if (size)
        sum += *(u_char *) data;

    while ((size = (u_short) (sum >> 16)) != 0)
        sum = (u_short) sum + size;

    return (u_short) sum ^ 0xFFFF;
}

-- 
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Brett Abbott, Managing Director, Digital Telemetry Limited
Email: Brett.Abbott at digital-telemetry.com
PO Box 24 036 Manners Street, Wellington, New Zealand
Phone +64 (4) 5666-860  Mobile +64 (21) 656-144
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