fis-gtm/sr_port/five_bit.c

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/****************************************************************
* *
* Copyright 2002 Sanchez Computer Associates, Inc. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "five_bit.h"
/* five_bit - convert 3-character string into 5-bit character representation */
unsigned short five_bit(unsigned char *src) /* src is pointer to 3-character string to be converted to 5-bit format */
{
int index;
unsigned short result;
/* Or low-order 5 bits of each character together into high-order 15 bits of result. */
for (index = 0, result = 0; index < 3; index++, src++)
result = (result << 5) | (*src & 0x1f);
result <<= 1;
return result;
}