e0ca8d76e2
* merge unstable kernel optimizations * enable seek for int2f/AX=1228 * -1 is a valid offset, so we need to process the return code seperately git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@1429 6ac86273-5f31-0410-b378-82cca8765d1b
144 lines
6.6 KiB
C
144 lines
6.6 KiB
C
/****************************************************************/
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/* */
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/* sft.h */
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/* DOS-C */
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/* */
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/* DOS System File Table Structure */
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/* */
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/* Copyright (c) 1995, 1996 */
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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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#ifdef MAIN
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#ifdef VERSION_STRINGS
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static BYTE *sft_hRcsId =
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"$Id$";
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#endif
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#endif
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#define SFTMAX 128
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/* Handle Definition entry */
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typedef struct {
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WORD sft_count; /* 00 - reference count */
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WORD sft_mode; /* 02 - open mode - see below */
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BYTE sft_attrib; /* 04 - file attribute - dir style */
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union /* 05 */
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{
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WORD _sft_flags;
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struct {
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BYTE _sft_flags_lo;
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BYTE _sft_flags_hi;
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} _split_sft_flags;
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} sft_flags_union;
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union /* 07 */
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{
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struct dpb FAR *_sft_dcb; /* The device control block */
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struct dhdr FAR *_sft_dev; /* device driver for char dev */
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} sft_dcb_or_dev;
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#ifdef WITHFAT32
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UWORD sft_relclust_high; /* 0b - High part of relative cluster */
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#else
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CLUSTER sft_stclust; /* 0b - Starting cluster */
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#endif
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time sft_time; /* 0d - File time */
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date sft_date; /* 0f - File date */
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ULONG sft_size; /* 11 - File size */
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ULONG sft_posit; /* 15 - Current file position */
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UWORD sft_relclust; /* 19 - File relative cluster (low part) */
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ULONG sft_dirsector; /* 1b - Sector containing cluster */
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UBYTE sft_diridx; /* 1f - directory index */
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BYTE sft_name[11]; /* 20 - dir style file name */
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#ifdef WITHFAT32
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CLUSTER sft_stclust; /* 2b - Starting cluster */
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#else
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BYTE FAR *sft_bshare; /* 2b - backward link of file sharing sft */
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#endif
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WORD sft_mach; /* 2f - machine number - network apps */
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WORD sft_psp; /* 31 - owner psp */
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WORD sft_shroff; /* 33 - Sharing offset */
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CLUSTER sft_cuclust; /* 35 - File current cluster */
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#ifdef WITHFAT32
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UWORD sft_pad;
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#else
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BYTE FAR *sft_ifsptr; /* 37 - pointer to IFS driver for file, 0000000h if native DOS */
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#endif
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} sft;
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/* SFT Table header definition */
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typedef struct _sftheader {
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struct sfttbl FAR * /* link to next table in list */
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sftt_next;
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WORD sftt_count; /* # of handle definition */
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/* entries, this table */
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} sftheader;
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/* System File Definition List */
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typedef struct sfttbl {
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struct sfttbl FAR * /* link to next table in list */
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sftt_next;
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WORD sftt_count; /* # of handle definition */
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/* entries, this table */
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sft sftt_table[SFTMAX]; /* The array of sft for block */
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} sfttbl;
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/* defines for sft use */
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#define SFT_MASK 0x0060 /* splits device data */
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/* flag bits */
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/* the following bit is for redirection */
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#define SFT_FSHARED 0x8000 /* Networked access */
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/* the following entry differntiates char & block access */
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#define SFT_FDEVICE 0x0080 /* device entry */
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/* the following bits are file (block) unique */
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#define SFT_FDATE 0x4000 /* File date set */
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#define SFT_FCLEAN 0x0040 /* File has not been written to */
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#define SFT_FDMASK 0x003f /* File mask for drive no */
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/* the following bits are device (char) unique */
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#define SFT_FIOCTL 0x4000 /* IOCTL support - device */
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#define SFT_FOCRM 0x0800 /* Open/Close/RM bit in device attribute*/
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#define SFT_FEOF 0x0040 /* device eof */
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#define SFT_FBINARY 0x0020 /* device binary mode */
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#define SFT_FSPECIAL 0x0010 /* int 29 support */
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#define SFT_FCLOCK 0x0008 /* device is clock */
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#define SFT_FNUL 0x0004 /* device is nul */
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#define SFT_FCONOUT 0x0002 /* device is console output */
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#define SFT_FCONIN 0x0001 /* device is console input */
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/* Convenience defines */
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#define sft_dcb sft_dcb_or_dev._sft_dcb
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#define sft_dev sft_dcb_or_dev._sft_dev
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#define sft_flags sft_flags_union._sft_flags
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#define sft_flags_hi sft_flags_union._split_sft_flags._sft_flags_hi
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#define sft_flags_lo sft_flags_union._split_sft_flags._sft_flags_lo
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/* defines for LSEEK */
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#define SEEK_SET 0u
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#define SEEK_CUR 1u
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#define SEEK_END 2u
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