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- /* This is file FREAD.C */
- /* This file may have been modified by DJ Delorie (Jan 1991). If so,
- ** these modifications are Coyright (C) 1993 DJ Delorie, 24 Kirsten Ave,
- ** Rochester NH, 03867-2954, USA.
- */
-
- /*
- * Copyright (c) 1980 Regents of the University of California.
- * All rights reserved. The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)fread.c 5.2 (Berkeley) 3/9/86";
- #endif LIBC_SCCS and not lint
-
- #include <stdio.h>
-
- fread(ptr, size, count, iop)
- register void *ptr;
- int size, count;
- register FILE *iop;
- {
- register int s;
- int c;
-
- s = size * count;
- while (s > 0) {
- if (iop->_cnt < s) {
- if (iop->_cnt > 0) {
- bcopy(iop->_ptr, ptr, iop->_cnt);
- ptr += iop->_cnt;
- s -= iop->_cnt;
- }
- /*
- * filbuf clobbers _cnt & _ptr,
- * so don't waste time setting them.
- */
- if ((c = _filbuf(iop)) == EOF)
- break;
- *(char *)ptr++ = c;
- s--;
- }
- if (iop->_cnt >= s) {
- bcopy(iop->_ptr, ptr, s);
- iop->_ptr += s;
- iop->_cnt -= s;
- return (count);
- }
- }
- return (size != 0 ? count - ((s + size - 1) / size) : 0);
- }
-