diff options
Diffstat (limited to 'i386/dos/dos_read.c')
-rw-r--r-- | i386/dos/dos_read.c | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/i386/dos/dos_read.c b/i386/dos/dos_read.c deleted file mode 100644 index ae7213f..0000000 --- a/i386/dos/dos_read.c +++ /dev/null @@ -1,75 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -#include <unistd.h> -#include <errno.h> - -#include "dos_io.h" -#include "vm_param.h" - -int dos_read(dos_fd_t fd, void *buf, vm_size_t size, vm_size_t *out_actual) -{ - int err; - int actual = 0; - struct real_call_data real_call_data; - vm_offset_t dos_buf_phys = (vm_offset_t)kvtophys(dos_buf); - - assert(dos_buf); assert(dos_buf_phys); - assert(dos_buf_phys < 0x100000); - - dos_init_rcd(&real_call_data); - - while (size > 0) - { - int little_size = size; - int little_actual; - - if (little_size > DOS_BUF_SIZE) - little_size = DOS_BUF_SIZE; - - real_call_data.eax = 0x3f00; - real_call_data.ebx = fd; - real_call_data.ecx = little_size; - real_call_data.ds = dos_buf_phys >> 4; - real_call_data.edx = dos_buf_phys & 15; - real_int(0x21, &real_call_data); - if (err = dos_check_err(&real_call_data)) - return err; - little_actual = real_call_data.eax & 0xffff; - assert(little_actual <= little_size); - - /* XXX don't copy if buf is <1MB */ - memcpy(buf, dos_buf, little_actual); - - buf += little_actual; - size -= little_actual; - actual += little_actual; - - if (little_actual < little_size) - break; - } - - *out_actual = actual; - return 0; -} - |