globals.h

开源DOS的C代码源程序

/****************************************************************/
/*                                                              */
/*                          globals.h                           */
/*                            DOS-C                             */
/*                                                              */
/*             Global data structures and declarations          */
/*                                                              */
/*                   Copyright (c) 1995, 1996                   */
/*                      Pasquale J. Villani                     */
/*                      All Rights Reserved                     */
/*                                                              */
/* This file is part of DOS-C.                                  */
/*                                                              */
/* DOS-C is free software; you can redistribute it and/or       */
/* modify it under the terms of the GNU General Public License  */
/* as published by the Free Software Foundation; either version */
/* 2, or (at your option) any later version.                    */
/*                                                              */
/* DOS-C is distributed in the hope that it will be useful, but */
/* WITHOUT ANY WARRANTY; without even the implied warranty of   */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See    */
/* the GNU General Public License for more details.             */
/*                                                              */
/* You should have received a copy of the GNU General Public    */
/* License along with DOS-C; see the file COPYING.  If not,     */
/* write to the Free Software Foundation, 675 Mass Ave,         */
/* Cambridge, MA 02139, USA.                                    */
/****************************************************************/

#ifdef VERSION_STRINGS
#ifdef MAIN
static BYTE *Globals_hRcsId =
    "$Id: globals.h,v 1.45 2004/05/23 15:10:08 bartoldeman Exp $";
#endif
#endif

#include "device.h"
#include "mcb.h"
#include "pcb.h"
#include "date.h"
#include "time.h"
#include "fat.h"
#include "fcb.h"
#include "tail.h"
#include "process.h"
#include "sft.h"
#include "cds.h"
#include "exe.h"
#include "fnode.h"
#include "dirmatch.h"
#include "file.h"
#include "clock.h"
#include "kbd.h"
#include "error.h"
#include "version.h"
#include "network.h"
#include "buffer.h"
#include "dcb.h"
#include "xstructs.h"

/* fatfs.c */
#ifdef WITHFAT32
VOID bpb_to_dpb(bpb FAR * bpbp, REG struct dpb FAR * dpbp, BOOL extended);
#else
VOID bpb_to_dpb(bpb FAR * bpbp, REG struct dpb FAR * dpbp);
#endif

#ifdef WITHFAT32
struct dpb FAR *GetDriveDPB(UBYTE drive, COUNT * rc);
#endif

extern struct dpb
FAR * ASM DPBp;                      /* First drive Parameter Block          */


/* JPP: for testing/debuging disk IO */
/*#define DISPLAY_GETBLOCK */

/*                                                                      */
/* Convience switch for maintaining variables in a single location      */
/*                                                                      */
#ifdef MAIN
#define GLOBAL
#else
#define GLOBAL extern
#endif

/*                                                                      */
/* Convience definitions of TRUE and FALSE                              */
/*                                                                      */
#ifndef TRUE
#define TRUE (1)
#endif
#ifndef FALSE
#define FALSE (0)
#endif

/*                                                                      */
/* Constants and macros                                                 */
/*                                                                      */
/* Defaults and limits - System wide                                    */
#define NAMEMAX         MAX_CDSPATH     /* Maximum path for CDS         */

/* internal error from failure or aborted operation                     */
#define ERROR           -1
#define OK              0

/* internal transfer direction flags                                    */
#define XFR_READ        1
#define XFR_WRITE       2
#define XFR_FORCE_WRITE 3
/* flag to update fcb_rndm field */
#define XFR_FCB_RANDOM  4

#define RDONLY          0
#define WRONLY          1
#define RDWR            2

/* special ascii code equates                                           */
#define SPCL            0x00
#define CTL_C           0x03
#define CTL_F           0x06
#define BELL            0x07
#define BS              0x08
#define HT              0x09
#define LF              0x0a
#define CR              0x0d
#define CTL_P           0x10
#define CTL_Q           0x11
#define CTL_S           0x13
#define CTL_Z           0x1a
#define ESC             0x1b
#define CTL_BS          0x7f

#define INS             0x5200
#define DEL             0x5300

#define F1              0x3b00
#define F2              0x3c00
#define F3              0x3d00
#define F4              0x3e00
#define F5              0x3f00
#define F6              0x4000
#define LEFT            0x4b00
#define RIGHT           0x4d00

/* Blockio constants                                                    */
#define DSKWRITE        1       /* dskxfr function parameters   */
#define DSKREAD         2
#define DSKWRITEINT26   3
#define DSKREADINT25    4

/* NLS character table type                                             */
typedef BYTE *UPMAP;

/*                                                                      */
/* External Assembly variables                                          */
/*                                                                      */
extern struct dhdr
FAR ASM clk_dev,                    /* Clock device driver                  */
  FAR ASM con_dev,                  /* Console device driver                */
  FAR ASM prn_dev,                  /* Generic printer device driver        */
  FAR ASM aux_dev,                  /* Generic aux device driver            */
  FAR ASM blk_dev;                  /* Block device (Disk) driver           */
extern COUNT *error_tos,        /* error stack                          */
  disk_api_tos,                 /* API handler stack - disk fns         */
  char_api_tos;                 /* API handler stack - char fns         */
extern BYTE FAR _InitTextStart; /* first available byte of ram          */
extern BYTE FAR _HMATextAvailable,      /* first byte of available CODE area    */
  FAR _HMATextStart[],          /* first byte of HMAable CODE area      */
  FAR _HMATextEnd[];            /* and the last byte of it              */
extern
BYTE DosLoadedInHMA;            /* if InitHMA has moved DOS up          */

extern struct ClockRecord
  ASM ClkRecord;

/*                                                                      */
/* Global variables                                                     */
/*                                                                      */
extern BYTE ASM os_setver_major,/* editable major version number        */
  ASM os_setver_minor,          /* editable minor version number        */
  ASM os_major,                 /* major version number                 */
  ASM os_minor,                 /* minor version number                 */
  ASM rev_number,               /* minor version number                 */
  ASM version_flags;            /* minor version number                 */

#ifdef DEBUG
GLOBAL WORD bDumpRegs
#ifdef MAIN
    = FALSE;
#else
 ;
#endif
GLOBAL WORD bDumpRdWrParms
#ifdef MAIN
    = FALSE;
#else
 ;
#endif
#endif

#if 0                           /* defined in MAIN.C now to save low memory */

GLOBAL BYTE copyright[] =
    "(C) Copyright 1995-2001 Pasquale J. Villani and The FreeDOS Project.\n"
    "All Rights Reserved. This is free software and comes with ABSOLUTELY NO\n"
    "WARRANTY; you can redistribute it and/or modify it under the terms of the\n"
    "GNU General Public License as published by the Free Software Foundation;\n"
    "either version 2, or (at your option) any later version.\n";

#endif

GLOBAL const BYTE ASM os_release[]