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/*
* (C) Copyright 2003
* Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*******************************************************/
/* file: lenval.h */
/* abstract: This file contains a description of the */
/* data structure "lenval". */
/*******************************************************/
#ifndef lenval_dot_h
#define lenval_dot_h
/* the lenVal structure is a byte oriented type used to store an */
/* arbitrary length binary value. As an example, the hex value */
/* 0x0e3d is represented as a lenVal with len=2 (since 2 bytes */
/* and val[0]=0e and val[1]=3d. val[2-MAX_LEN] are undefined */
/* maximum length (in bytes) of value to read in */
/* this needs to be at least 4, and longer than the */
/* length of the longest SDR instruction. If there is, */
/* only 1 device in the chain, MAX_LEN must be at least */
/* ceil(27/8) == 4. For 6 devices in a chain, MAX_LEN */
/* must be 5, for 14 devices MAX_LEN must be 6, for 20 */
/* devices MAX_LEN must be 7, etc.. */
/* You can safely set MAX_LEN to a smaller number if you*/
/* know how many devices will be in your chain. */
#define MAX_LEN 7000
typedef struct var_len_byte
{
short len; /* number of chars in this value */
unsigned char val[MAX_LEN+1]; /* bytes of data */
} lenVal;
/* return the long representation of a lenVal */
extern long value(lenVal *x);
/* set lenVal equal to value */
extern void initLenVal(lenVal *x, long value);
/* check if expected equals actual (taking the mask into account) */
extern short EqualLenVal(lenVal *expected, lenVal *actual, lenVal *mask);
/* add val1+val2 and put the result in resVal */
extern void addVal(lenVal *resVal, lenVal *val1, lenVal *val2);
/* return the (byte, bit) of lv (reading from left to right) */
extern short RetBit(lenVal *lv, int byte, int bit);
/* set the (byte, bit) of lv equal to val (e.g. SetBit("00000000",byte, 1)
equals "01000000" */
extern void SetBit(lenVal *lv, int byte, int bit, short val);
/* read from XSVF numBytes bytes of data into x */
extern void readVal(lenVal *x, short numBytes);
#endif
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