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/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/* @(#)fillbytes.c 1.13 03/06/15 Copyright 1987, 1995-2003 J. Schilling */
/*
* fill memory with data
*
* Copyright (c) 1987, 1995-2003 J. Schilling
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <standard.h>
#include <align.h>
#include <schily.h>
#define DO8(a) a; a; a; a; a; a; a; a;
#define cval ((char) lval)
#ifdef PROTOTYPES
EXPORT char *
fillbytes(void *tov, int cnt, char val)
#else
EXPORT char *
fillbytes(tov, cnt, val)
void *tov;
int cnt;
char val;
#endif
{
register char *to = (char *)tov;
register int n;
register long lval;
/*
* If we change cnt to be unsigned, check for == instead of <=
*/
if ((n = cnt) <= 0)
return (to);
lval = val & 0xFF;
/*
* Assign byte-wise until properly aligned for a long pointer.
*/
while (--n >= 0 && !laligned(to)) {
*to++ = cval;
}
n++;
if (n >= (int)(8 * sizeof (long))) {
register int rem = n % (8 * sizeof (long));
lval |= (lval<<8);
lval |= (lval<<16);
#if SIZE_LONG > SIZE_INT
lval |= (lval<<32);
#endif
n /= (8 * sizeof (long));
{
register long *tol = (long *)to;
do {
DO8 (*tol++ = lval);
} while (--n > 0);
to = (char *)tol;
}
n = rem;
if (n >= 8) {
n -= 8;
do {
DO8 (*to++ = cval);
} while ((n -= 8) >= 0);
n += 8;
}
if (n > 0) do {
*to++ = cval;
} while (--n > 0);
return (to);
}
if (n > 0) do {
*to++ = cval;
} while (--n > 0);
return (to);
}
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