e67a8f5058
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@485 6ac86273-5f31-0410-b378-82cca8765d1b
124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/****************************************************************/
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/* */
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/* syspack.c */
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/* */
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/* System Disk Byte Order Packing Functions */
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/* */
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/* Copyright (c) 1995 */
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/* Pasquale J. Villani */
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/* All Rights Reserved */
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/* */
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/* This file is part of DOS-C. */
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/* */
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/* DOS-C is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU General Public License */
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/* as published by the Free Software Foundation; either version */
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/* 2, or (at your option) any later version. */
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/* */
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/* DOS-C is distributed in the hope that it will be useful, but */
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/* WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
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/* the GNU General Public License for more details. */
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/* */
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/* You should have received a copy of the GNU General Public */
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/* License along with DOS-C; see the file COPYING. If not, */
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/* write to the Free Software Foundation, 675 Mass Ave, */
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/* Cambridge, MA 02139, USA. */
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/* */
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/****************************************************************/
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#include "portab.h"
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#include "globals.h"
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#ifdef VERSION_STRINGS
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static BYTE *syspackRcsId =
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"$Id$";
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#endif
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#ifdef NONNATIVE
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UDWORD getlong(REG VOID * vp)
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{
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return (((UBYTE *) vp)[0] & 0xff) +
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((((UBYTE *) vp)[1] & 0xff) << 8) +
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((((UBYTE *) vp)[2] & 0xff) << 16) +
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((((UBYTE *) vp)[3] & 0xff) << 24);
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}
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UWORD getword(REG VOID * vp)
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{
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return (((UBYTE *) vp)[0] & 0xff) + ((((UBYTE *) vp)[1] & 0xff) << 8);
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}
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UBYTE getbyte(VOID * vp)
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{
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return *((BYTE *) vp);
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}
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UWORD fgetword(REG VOID FAR * vp)
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{
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return (((UBYTE FAR *) vp)[0] & 0xff) + ((((UBYTE FAR *) vp)[1] & 0xff) << 8);
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}
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UDWORD fgetlong(REG VOID FAR * vp)
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{
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return (((UBYTE *) vp)[0] & 0xff) +
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((((UBYTE *) vp)[1] & 0xff) << 8) +
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((((UBYTE *) vp)[2] & 0xff) << 16) +
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((((UBYTE *) vp)[3] & 0xff) << 24);
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}
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UBYTE fgetbyte(VOID FAR * vp)
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{
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return *((UBYTE FAR *) vp);
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}
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VOID fputlong(VOID FAR * vp, UDWORD l)
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{
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REG UBYTE FAR *bp = (UBYTE FAR *) vp;
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bp[0] = l & 0xff;
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bp[1] = (l >> 8) & 0xff;
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bp[2] = (l >> 16) & 0xff;
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bp[3] = (l >> 24) & 0xff;
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}
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VOID fputword(VOID FAR * vp, UWORD w)
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{
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REG UBYTE FAR *bp = (UBYTE FAR *) vp;
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bp[0] = w & 0xff;
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bp[1] = (w >> 8) & 0xff;
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}
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VOID fputbyte(VOID FAR * vp, UBYTE b)
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{
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*(UBYTE FAR *) vp = b;
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}
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VOID getdirent(UBYTE FAR * vp, struct dirent FAR * dp)
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{
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fmemcpy(dp->dir_name, &vp[DIR_NAME], FNAME_SIZE + FEXT_SIZE);
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dp->dir_attrib = fgetbyte(&vp[DIR_ATTRIB]);
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dp->dir_time = fgetword(&vp[DIR_TIME]);
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dp->dir_date = fgetword(&vp[DIR_DATE]);
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dp->dir_start = fgetword(&vp[DIR_START]);
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dp->dir_size = fgetlong(&vp[DIR_SIZE]);
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}
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VOID putdirent(struct dirent FAR * dp, UBYTE FAR * vp)
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{
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REG COUNT i;
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REG BYTE FAR *p;
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fmemcpy(&vp[DIR_NAME], dp->dir_name, FNAME_SIZE + FEXT_SIZE);
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fputbyte(&vp[DIR_ATTRIB], dp->dir_attrib);
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fputword(&vp[DIR_TIME], dp->dir_time);
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fputword(&vp[DIR_DATE], dp->dir_date);
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fputword(&vp[DIR_START], dp->dir_start);
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fputlong(&vp[DIR_SIZE], dp->dir_size);
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for (i = 0, p = (UBYTE FAR *) & vp[DIR_RESERVED]; i < 10; i++)
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*p++ = NULL;
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}
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#endif
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