Make all bucket and overflow addresses unsigned

[unix-history] / usr / src / lib / libc / stdio / fread.c

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* %sccs.include.redist.c%
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)fread.c     5.3 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <stdio.h>
#include <string.h>

fread(buf, size, count, fp)
       void *buf;
       size_t size, count;
       register FILE *fp;
{
       register size_t resid;
       register char *p;
       register int r;
       size_t total;

       if ((resid = count * size) == 0)
               return (count);
       if (fp->_r < 0)
               fp->_r = 0;
       total = resid;
       p = buf;
       while (resid > (r = fp->_r)) {
               (void) memcpy((void *)p, (void *)fp->_p, (size_t)r);
               fp->_p += r;
               /* fp->_r = 0 ... done in __srefill */
               p += r;
               resid -= r;
               if (__srefill(fp)) {
                       /* no more input: return partial result */
                       return ((total - resid) / size);
               }
       }
       (void) memcpy((void *)p, (void *)fp->_p, resid);
       fp->_r -= resid;
       fp->_p += resid;
       return (count);
}