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719 lines
16 KiB
ObjectPascal
719 lines
16 KiB
ObjectPascal
{
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$Id$
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2000 by the Free Pascal development team.
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Dos unit for BP7 compatible RTL
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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unit dos;
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interface
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Uses
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Go32;
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Const
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{Bitmasks for CPU Flags}
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fcarry = $0001;
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fparity = $0004;
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fauxiliary = $0010;
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fzero = $0040;
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fsign = $0080;
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foverflow = $0800;
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{Bitmasks for file attribute}
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readonly = $01;
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hidden = $02;
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sysfile = $04;
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volumeid = $08;
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directory = $10;
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archive = $20;
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anyfile = $3F;
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{File Status}
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fmclosed = $D7B0;
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fminput = $D7B1;
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fmoutput = $D7B2;
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fminout = $D7B3;
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Type
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comstr = string[127]; { command line string }
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pathstr = string[79]; { string for a file path }
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dirstr = string[67]; { string for a directory }
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namestr = string[8]; { string for a file name }
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extstr = string[4]; { string for an extension }
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{
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filerec.inc contains the definition of the filerec.
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textrec.inc contains the definition of the textrec.
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It is in a separate file to make it available in other units without
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having to use the DOS unit for it.
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}
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{$i filerec.inc}
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{$i textrec.inc}
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DateTime = packed record
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Year,
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Month,
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Day,
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Hour,
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Min,
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Sec : word;
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End;
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searchrec = packed record
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fill : array[1..21] of byte;
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attr : byte;
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time : longint;
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reserved : word; { requires the DOS extender (DJ GNU-C) }
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size : longint;
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name : string[15]; { the same size as declared by (DJ GNU C) }
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end;
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registers = packed record
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case i : integer of
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0 : (ax,f1,bx,f2,cx,f3,dx,f4,bp,f5,si,f51,di,f6,ds,f7,es,f8,flags,fs,gs : word);
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1 : (al,ah,f9,f10,bl,bh,f11,f12,cl,ch,f13,f14,dl,dh : byte);
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2 : (eax, ebx, ecx, edx, ebp, esi, edi : longint);
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end;
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Var
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DosError : integer;
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{Interrupt}
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Procedure Intr(intno: byte; var regs: registers);
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Procedure MSDos(var regs: registers);
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{Info/Date/Time}
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Function DosVersion: Word;
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Procedure GetDate(var year, month, mday, wday: word);
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Procedure GetTime(var hour, minute, second, sec100: word);
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procedure SetDate(year,month,day: word);
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Procedure SetTime(hour,minute,second,sec100: word);
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Procedure UnpackTime(p: longint; var t: datetime);
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Procedure PackTime(var t: datetime; var p: longint);
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{Exec}
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Procedure Exec(const path: pathstr; const comline: comstr);
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Function DosExitCode: word;
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{Disk}
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Function DiskFree(drive: byte) : longint;
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Function DiskSize(drive: byte) : longint;
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Procedure FindFirst(const path: pathstr; attr: word; var f: searchRec);
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Procedure FindNext(var f: searchRec);
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Procedure FindClose(Var f: SearchRec);
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{File}
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Procedure GetFAttr(var f; var attr: word);
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Procedure GetFTime(var f; var time: longint);
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Function FSearch(path: pathstr; dirlist: string): pathstr;
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Function FExpand(const path: pathstr): pathstr;
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Procedure FSplit(path: pathstr; var dir: dirstr; var name: namestr; var ext: extstr);
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{Environment}
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Function EnvCount: longint;
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Function EnvStr(index: integer): string;
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Function GetEnv(envvar: string): string;
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{Misc}
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Procedure SetFAttr(var f; attr: word);
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Procedure SetFTime(var f; time: longint);
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Procedure GetCBreak(var breakvalue: boolean);
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Procedure SetCBreak(breakvalue: boolean);
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Procedure GetVerify(var verify: boolean);
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Procedure SetVerify(verify: boolean);
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{Do Nothing Functions}
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Procedure SwapVectors;
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Procedure GetIntVec(intno: byte; var vector: pointer);
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Procedure SetIntVec(intno: byte; vector: pointer);
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Procedure Keep(exitcode: word);
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implementation
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uses
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strings;
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{$ASMMODE ATT}
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{******************************************************************************
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--- Dos Interrupt ---
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******************************************************************************}
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var
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dosregs : registers;
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procedure LoadDosError;
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begin
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if (dosregs.flags and carryflag) <> 0 then
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{ conversion from word to integer !!
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gave a Bound check error if ax is $FFFF !! PM }
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doserror:=integer(dosregs.ax)
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else
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doserror:=0;
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end;
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{$ASMMODE DIRECT}
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procedure intr(intno : byte;var regs : registers);
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begin
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asm
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.data
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int86:
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.byte 0xcd
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int86_vec:
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.byte 0x03
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jmp int86_retjmp
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.text
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movl 8(%ebp),%eax
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movb %al,int86_vec
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movl 10(%ebp),%eax
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// do not use first int
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addl $2,%eax
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movl 4(%eax),%ebx
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movl 8(%eax),%ecx
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movl 12(%eax),%edx
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movl 16(%eax),%ebp
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movl 20(%eax),%esi
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movl 24(%eax),%edi
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movl (%eax),%eax
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jmp int86
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int86_retjmp:
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pushf
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pushl %ebp
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pushl %eax
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movl %esp,%ebp
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// calc EBP new
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addl $12,%ebp
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movl 10(%ebp),%eax
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// do not use first int
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addl $2,%eax
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popl (%eax)
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movl %ebx,4(%eax)
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movl %ecx,8(%eax)
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movl %edx,12(%eax)
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// restore EBP
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popl %edx
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movl %edx,16(%eax)
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movl %esi,20(%eax)
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movl %edi,24(%eax)
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// ignore ES and DS
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popl %ebx /* flags */
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movl %ebx,32(%eax)
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// FS and GS too
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end;
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end;
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{$ASMMODE ATT}
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procedure msdos(var regs : registers);
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begin
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intr($21,regs);
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end;
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{******************************************************************************
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--- Info / Date / Time ---
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******************************************************************************}
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function dosversion : word;
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begin
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dosregs.ax:=$3000;
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msdos(dosregs);
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dosversion:=dosregs.ax;
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end;
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procedure getdate(var year,month,mday,wday : word);
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begin
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dosregs.ax:=$2a00;
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msdos(dosregs);
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wday:=dosregs.al;
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year:=dosregs.cx;
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month:=dosregs.dh;
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mday:=dosregs.dl;
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end;
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procedure setdate(year,month,day : word);
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begin
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dosregs.cx:=year;
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dosregs.dh:=month;
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dosregs.dl:=day;
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dosregs.ah:=$2b;
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msdos(dosregs);
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DosError:=0;
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end;
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procedure gettime(var hour,minute,second,sec100 : word);
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begin
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dosregs.ah:=$2c;
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msdos(dosregs);
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hour:=dosregs.ch;
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minute:=dosregs.cl;
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second:=dosregs.dh;
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sec100:=dosregs.dl;
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DosError:=0;
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end;
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procedure settime(hour,minute,second,sec100 : word);
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begin
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dosregs.ch:=hour;
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dosregs.cl:=minute;
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dosregs.dh:=second;
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dosregs.dl:=sec100;
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dosregs.ah:=$2d;
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msdos(dosregs);
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DosError:=0;
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end;
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Procedure packtime(var t : datetime;var p : longint);
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Begin
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p:=(t.sec shr 1)+(t.min shl 5)+(t.hour shl 11)+(t.day shl 16)+(t.month shl 21)+((t.year-1980) shl 25);
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End;
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Procedure unpacktime(p : longint;var t : datetime);
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Begin
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with t do
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begin
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sec:=(p and 31) shl 1;
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min:=(p shr 5) and 63;
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hour:=(p shr 11) and 31;
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day:=(p shr 16) and 31;
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month:=(p shr 21) and 15;
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year:=(p shr 25)+1980;
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end;
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End;
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{******************************************************************************
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--- Exec ---
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******************************************************************************}
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var
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lastdosexitcode : word;
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procedure exec(const path : pathstr;const comline : comstr);
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var
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i : longint;
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b : array[0..255] of char;
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begin
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doserror:=0;
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for i:=1to length(path) do
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if path[i]='/' then
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b[i-1]:='\'
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else
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b[i-1]:=path[i];
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b[i]:=' ';
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inc(i);
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move(comline[1],b[i],length(comline));
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inc(i,length(comline));
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b[i]:=#0;
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asm
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leal b,%ebx
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movw $0xff07,%ax
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int $0x21
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movw %ax,LastDosExitCode
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end;
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end;
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function dosexitcode : word;
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begin
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dosexitcode:=lastdosexitcode;
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end;
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procedure getcbreak(var breakvalue : boolean);
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begin
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DosError:=0;
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dosregs.ax:=$3300;
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msdos(dosregs);
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breakvalue:=dosregs.dl<>0;
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end;
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procedure setcbreak(breakvalue : boolean);
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begin
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DosError:=0;
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dosregs.ax:=$3301;
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dosregs.dl:=ord(breakvalue);
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msdos(dosregs);
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end;
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procedure getverify(var verify : boolean);
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begin
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DosError:=0;
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dosregs.ah:=$54;
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msdos(dosregs);
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verify:=dosregs.al<>0;
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end;
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procedure setverify(verify : boolean);
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begin
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DosError:=0;
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dosregs.ah:=$2e;
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dosregs.al:=ord(verify);
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msdos(dosregs);
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end;
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{******************************************************************************
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--- Disk ---
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******************************************************************************}
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function diskfree(drive : byte) : longint;
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begin
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DosError:=0;
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dosregs.dl:=drive;
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dosregs.ah:=$36;
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msdos(dosregs);
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if dosregs.ax<>$FFFF then
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diskfree:=dosregs.ax*dosregs.bx*dosregs.cx
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else
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diskfree:=-1;
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end;
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function disksize(drive : byte) : longint;
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begin
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DosError:=0;
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dosregs.dl:=drive;
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dosregs.ah:=$36;
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msdos(dosregs);
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if dosregs.ax<>$FFFF then
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disksize:=dosregs.ax*dosregs.cx*dosregs.dx
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else
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disksize:=-1;
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end;
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{******************************************************************************
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--- DosFindfirst DosFindNext ---
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******************************************************************************}
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procedure dossearchrec2searchrec(var f : searchrec);
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var
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len : longint;
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begin
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len:=StrLen(@f.Name);
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Move(f.Name[0],f.Name[1],Len);
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f.Name[0]:=chr(len);
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end;
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procedure Dosfindfirst(path : pchar;attr : word;var f : searchrec);
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var
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i : longint;
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begin
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{ allow slash as backslash }
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for i:=0 to strlen(path) do
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if path[i]='/' then path[i]:='\';
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asm
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movl f,%edx
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movb $0x1a,%ah
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int $0x21
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movl path,%edx
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movzwl attr,%ecx
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movb $0x4e,%ah
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int $0x21
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jnc .LFF
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movw %ax,DosError
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.LFF:
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end;
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dossearchrec2searchrec(f);
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end;
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procedure Dosfindnext(var f : searchrec);
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begin
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asm
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movl 12(%ebp),%edx
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movb $0x1a,%ah
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int $0x21
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movb $0x4f,%ah
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int $0x21
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jnc .LFN
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movw %ax,DosError
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.LFN:
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end;
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dossearchrec2searchrec(f);
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end;
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{******************************************************************************
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--- Findfirst FindNext ---
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******************************************************************************}
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procedure findfirst(const path : pathstr;attr : word;var f : searchRec);
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var
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path0 : array[0..256] of char;
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begin
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doserror:=0;
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strpcopy(path0,path);
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Dosfindfirst(path0,attr,f);
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end;
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procedure findnext(var f : searchRec);
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begin
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doserror:=0;
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Dosfindnext(f);
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end;
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Procedure FindClose(Var f: SearchRec);
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begin
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DosError:=0;
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end;
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procedure swapvectors;
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begin
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DosError:=0;
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end;
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{******************************************************************************
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--- File ---
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******************************************************************************}
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procedure fsplit(path : pathstr;var dir : dirstr;var name : namestr;var ext : extstr);
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var
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p1,i : longint;
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begin
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{ allow slash as backslash }
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for i:=1 to length(path) do
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if path[i]='/' then path[i]:='\';
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{ get drive name }
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p1:=pos(':',path);
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if p1>0 then
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begin
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dir:=path[1]+':';
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delete(path,1,p1);
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end
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else
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dir:='';
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{ split the path and the name, there are no more path informtions }
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{ if path contains no backslashes }
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while true do
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begin
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p1:=pos('\',path);
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if p1=0 then
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break;
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dir:=dir+copy(path,1,p1);
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delete(path,1,p1);
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end;
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{ try to find out a extension }
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begin
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p1:=pos('.',path);
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if p1>0 then
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begin
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ext:=copy(path,p1,4);
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delete(path,p1,length(path)-p1+1);
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end
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else
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ext:='';
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name:=path;
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end;
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end;
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|
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(*
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function FExpand (const Path: PathStr): PathStr;
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- declared in fexpand.inc
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*)
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{$DEFINE FPC_FEXPAND_UNC} (* UNC paths are supported *)
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{$DEFINE FPC_FEXPAND_DRIVES} (* Full paths begin with drive specification *)
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{$I fexpand.inc}
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{$UNDEF FPC_FEXPAND_DRIVES}
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{$UNDEF FPC_FEXPAND_UNC}
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|
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Function FSearch(path: pathstr; dirlist: string): pathstr;
|
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var
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i,p1 : longint;
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s : searchrec;
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newdir : pathstr;
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begin
|
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{ No wildcards allowed in these things }
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if (pos('?',path)<>0) or (pos('*',path)<>0) then
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fsearch:=''
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else
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begin
|
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{ allow slash as backslash }
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for i:=1 to length(dirlist) do
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if dirlist[i]='/' then dirlist[i]:='\';
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repeat
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p1:=pos(';',dirlist);
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if p1<>0 then
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begin
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newdir:=copy(dirlist,1,p1-1);
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delete(dirlist,1,p1);
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end
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else
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begin
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newdir:=dirlist;
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dirlist:='';
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end;
|
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if (newdir<>'') and (not (newdir[length(newdir)] in ['\',':'])) then
|
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newdir:=newdir+'\';
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findfirst(newdir+path,anyfile,s);
|
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if doserror=0 then
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newdir:=newdir+path
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else
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newdir:='';
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until (dirlist='') or (newdir<>'');
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fsearch:=newdir;
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end;
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end;
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|
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|
{******************************************************************************
|
|
--- Get/Set File Time,Attr ---
|
|
******************************************************************************}
|
|
|
|
procedure getftime(var f;var time : longint);
|
|
begin
|
|
dosregs.bx:=textrec(f).handle;
|
|
dosregs.ax:=$5700;
|
|
msdos(dosregs);
|
|
loaddoserror;
|
|
time:=(dosregs.dx shl 16)+dosregs.cx;
|
|
end;
|
|
|
|
|
|
procedure setftime(var f;time : longint);
|
|
begin
|
|
dosregs.bx:=textrec(f).handle;
|
|
dosregs.cx:=time and $ffff;
|
|
dosregs.dx:=time shr 16;
|
|
dosregs.ax:=$5701;
|
|
msdos(dosregs);
|
|
loaddoserror;
|
|
end;
|
|
|
|
|
|
procedure getfattr(var f;var attr : word);
|
|
begin
|
|
dosregs.edx:=longint(@filerec(f).name);
|
|
dosregs.ax:=$4300;
|
|
msdos(dosregs);
|
|
LoadDosError;
|
|
Attr:=dosregs.cx;
|
|
end;
|
|
|
|
|
|
procedure setfattr(var f;attr : word);
|
|
begin
|
|
dosregs.edx:=longint(@filerec(f).name);
|
|
dosregs.ax:=$4301;
|
|
dosregs.cx:=attr;
|
|
msdos(dosregs);
|
|
LoadDosError;
|
|
end;
|
|
|
|
|
|
{******************************************************************************
|
|
--- Environment ---
|
|
******************************************************************************}
|
|
|
|
function envcount : longint;
|
|
var
|
|
hp : ppchar;
|
|
begin
|
|
hp:=envp;
|
|
envcount:=0;
|
|
while assigned(hp^) do
|
|
begin
|
|
inc(envcount);
|
|
hp:=hp+4;
|
|
end;
|
|
end;
|
|
|
|
|
|
function envstr(index : integer) : string;
|
|
begin
|
|
if (index<=0) or (index>envcount) then
|
|
begin
|
|
envstr:='';
|
|
exit;
|
|
end;
|
|
envstr:=strpas(ppchar(envp+4*(index-1))^);
|
|
end;
|
|
|
|
|
|
Function GetEnv(envvar: string): string;
|
|
var
|
|
hp : ppchar;
|
|
hs : string;
|
|
eqpos : longint;
|
|
begin
|
|
envvar:=upcase(envvar);
|
|
hp:=envp;
|
|
getenv:='';
|
|
while assigned(hp^) do
|
|
begin
|
|
hs:=strpas(hp^);
|
|
eqpos:=pos('=',hs);
|
|
if copy(hs,1,eqpos-1)=envvar then
|
|
begin
|
|
getenv:=copy(hs,eqpos+1,255);
|
|
exit;
|
|
end;
|
|
hp:=hp+4;
|
|
end;
|
|
end;
|
|
|
|
|
|
{******************************************************************************
|
|
--- Not Supported ---
|
|
******************************************************************************}
|
|
|
|
Procedure keep(exitcode : word);
|
|
Begin
|
|
End;
|
|
|
|
Procedure getintvec(intno : byte;var vector : pointer);
|
|
Begin
|
|
End;
|
|
|
|
Procedure setintvec(intno : byte;vector : pointer);
|
|
Begin
|
|
End;
|
|
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.3 2001-03-10 09:57:51 hajny
|
|
* FExpand without IOResult change, remaining direct asm removed
|
|
|
|
Revision 1.2 2000/07/13 11:33:38 michael
|
|
+ removed logs
|
|
|
|
}
|