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458 lines
11 KiB
ObjectPascal
458 lines
11 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 Florian Klaempfl
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member of the Free Pascal development team
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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 sysutils;
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interface
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{$MODE objfpc}
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{ force ansistrings }
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{$H+}
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uses
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{$ifdef linux}
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linux
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{$endif}
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{$ifdef win32}
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dos,windows
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{$endif}
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{$ifdef go32v1}
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go32,dos
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{$endif}
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{$ifdef go32v2}
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go32,dos
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{$endif}
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{$ifdef os2}
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doscalls,dos
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{$endif}
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;
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type
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{ some helpful data types }
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tprocedure = procedure;
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tfilename = string;
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tsyscharset = set of char;
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longrec = packed record
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lo,hi : word;
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end;
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wordrec = packed record
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lo,hi : byte;
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end;
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TMethod = packed record
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Code, Data: Pointer;
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end;
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{ exceptions }
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exception = class(TObject)
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private
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fmessage : string;
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fhelpcontext : longint;
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public
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constructor create(const msg : string);
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constructor createfmt(const msg : string; const args : array of const);
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constructor createres(ident : longint);
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{ !!!! }
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property helpcontext : longint read fhelpcontext write fhelpcontext;
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property message : string read fmessage write fmessage;
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end;
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exceptclass = class of exception;
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{ integer math exceptions }
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EInterror = Class(Exception);
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EDivByZero = Class(EIntError);
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ERangeError = Class(EIntError);
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EIntOverflow = Class(EIntError);
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{ General math errors }
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EMathError = Class(Exception);
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EInvalidOp = Class(EMathError);
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EZeroDivide = Class(EMathError);
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EOverflow = Class(EMathError);
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EUnderflow = Class(EMathError);
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{ Run-time and I/O Errors }
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EInOutError = class(Exception)
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public
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ErrorCode : Longint;
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end;
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EInvalidPointer = Class(Exception);
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EOutOfMemory = Class(Exception);
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EAccessViolation = Class(Exception);
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EInvalidCast = Class(Exception);
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{ String conversion errors }
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EConvertError = class(Exception);
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{ Other errors }
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EAbort = Class(Exception);
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EAbstractError = Class(Exception);
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EAssertionFailed = Class(Exception);
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{ Exception handling routines }
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function ExceptObject: TObject;
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function ExceptAddr: Pointer;
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function ExceptionErrorMessage(ExceptObject: TObject; ExceptAddr: Pointer;
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Buffer: PChar; Size: Integer): Integer;
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procedure ShowException(ExceptObject: TObject; ExceptAddr: Pointer);
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procedure Abort;
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procedure OutOfMemoryError;
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procedure Beep;
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Var
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OnShowException : Procedure (Msg : ShortString);
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{ FileRec/TextRec }
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{$i filerec.inc}
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{$i textrec.inc}
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{ Read internationalization settings }
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{$i sysinth.inc}
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{ Read date & Time function declarations }
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{$i datih.inc}
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{ Read String Handling functions declaration }
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{$i sysstrh.inc}
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{ Read pchar handling functions declration }
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{$i syspchh.inc}
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{ Read filename handling functions declaration }
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{$i finah.inc}
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{ Read other file handling function declarations }
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{$i filutilh.inc}
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{ Read disk function declarations }
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{$i diskh.inc}
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implementation
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{ Read message string definitions }
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{
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Add a language with IFDEF LANG_NAME
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just befor the final ELSE. This way English will always be the default.
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}
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{$IFDEF LANG_GERMAN}
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{$i strg.inc} // Does not exist yet !!
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{$ELSE}
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{$i stre.inc}
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{$ENDIF}
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{ Read filename handling functions implementation }
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{$i fina.inc}
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{ Read String Handling functions implementation }
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{$i sysstr.inc}
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{ Read other file handling function implementations }
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{$i filutil.inc}
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{ Read disk function implementations }
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{$i disk.inc}
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{ Read date & Time function implementations }
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{$i dati.inc}
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{ Read pchar handling functions implementation }
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{$i syspch.inc}
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constructor exception.create(const msg : string);
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begin
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inherited create;
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fmessage:=msg;
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end;
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constructor exception.createfmt(const msg : string; const args : array of const);
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begin
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inherited create;
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fmessage:=Format(msg,args);
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end;
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constructor exception.createres(ident : longint);
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begin
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inherited create;
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{!!!!!}
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end;
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{$ifopt S+}
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{$define STACKCHECK_WAS_ON}
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{$S-}
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{$endif OPT S }
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Procedure CatchUnhandledException (Obj : TObject; Addr,Frame: Pointer);
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Var
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Message : String;
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begin
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Writeln(stdout,'An unhandled exception occurred at 0x',HexStr(Longint(Addr),8),' :');
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if Obj is exception then
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begin
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Message:=Exception(Obj).Message;
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Writeln(stdout,Message);
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end
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else
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Writeln(stdout,'Exception object ',Obj.ClassName,' is not of class Exception.');
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{ to get a nice symify }
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Writeln(stdout,BackTraceStrFunc(Longint(Addr)));
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Dump_Stack(stdout,longint(frame));
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Writeln(stdout,'');
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Halt(217);
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end;
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Var OutOfMemory : EOutOfMemory;
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InValidPointer : EInvalidPointer;
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Procedure RunErrorToExcept (ErrNo : Longint; Address,Frame : Pointer);
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Var E : Exception;
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S : String;
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begin
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Case Errno of
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1,203 : E:=OutOfMemory;
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204 : E:=InvalidPointer;
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2,3,4,5,6,100,101,102,103,105,106 : { I/O errors }
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begin
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Case Errno of
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2 : S:=SFileNotFound;
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3 : S:=SInvalidFileName;
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4 : S:=STooManyOpenFiles;
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5 : S:=SAccessDenied;
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6 : S:=SInvalidFileHandle;
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15 : S:=SInvalidDrive;
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100 : S:=SEndOfFile;
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101 : S:=SDiskFull;
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102 : S:=SFileNotAssigned;
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103 : S:=SFileNotOpen;
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104 : S:=SFileNotOpenForInput;
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105 : S:=SFileNotOpenForOutput;
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106 : S:=SInvalidInput;
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end;
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E:=EinOutError.Create (S);
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EInoutError(E).ErrorCode:=IOresult; // Clears InOutRes !!
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end;
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// We don't set abstracterrorhandler, but we do it here.
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// Unless the use sets another handler we'll get here anyway...
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200 : E:=EDivByZero.Create(SDivByZero);
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201 : E:=ERangeError.Create(SRangeError);
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205 : E:=EOverflow.Create(SOverflow);
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206 : E:=EOverflow.Create(SUnderflow);
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207 : E:=EInvalidOp.Create(SInvalidOp);
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211 : E:=EAbstractError.Create(SAbstractError);
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215 : E:=EIntOverflow.Create(SIntOverflow);
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216 : E:=EAccessViolation.Create(SAccessViolation);
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219 : E:=EInvalidCast.Create(SInvalidCast);
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227 : E:=EAssertionFailed.Create(SAssertionFailed);
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else
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E:=Exception.CreateFmt (SUnKnownRunTimeError,[Errno]);
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end;
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Raise E at longint(Address){$ifdef ENHANCEDRAISE},longint(Frame){$endif};
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end;
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Procedure AssertErrorHandler (Const Msg,FN : ShortString;LineNo,TheAddr : Longint);
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Var
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S : String;
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begin
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If Msg='' then
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S:=SAssertionFailed
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else
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S:=Msg;
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Raise EAssertionFailed.Createfmt(SAssertError,[S,Fn,LineNo]); // at Pointer(theAddr);
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end;
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{$ifdef STACKCHECK_WAS_ON}
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{$S+}
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{$endif}
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Procedure InitExceptions;
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{
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Must install uncaught exception handler (ExceptProc)
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and install exceptions for system exceptions or signals.
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(e.g: SIGSEGV -> ESegFault or so.)
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}
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begin
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ExceptProc:=@CatchUnhandledException;
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// Create objects that may have problems when there is no memory.
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OutOfMemory:=EOutOfMemory.Create(SOutOfMemory);
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InvalidPointer:=EInvalidPointer.Create(SInvalidPointer);
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AssertErrorProc:=@AssertErrorHandler;
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ErrorProc:=@RunErrorToExcept;
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OnShowException:=Nil;
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end;
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{ Exception handling routines }
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function ExceptObject: TObject;
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begin
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If RaiseList=Nil then
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Result:=Nil
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else
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Result:=RaiseList^.FObject;
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end;
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function ExceptAddr: Pointer;
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begin
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If RaiseList=Nil then
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Result:=Nil
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else
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Result:=RaiseList^.Addr;
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end;
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function ExceptionErrorMessage(ExceptObject: TObject; ExceptAddr: Pointer;
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Buffer: PChar; Size: Integer): Integer;
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Var
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S : AnsiString;
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Len : Integer;
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begin
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S:=Format(SExceptionErrorMessage,[ExceptObject.ClassName,ExceptAddr]);
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If ExceptObject is Exception then
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S:=Format('%s:'#10'%s',[S,Exception(ExceptObject).Message]);
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Len:=Length(S);
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If S[Len]<>'.' then
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begin
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S:=S+'.';
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Inc(len);
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end;
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If Len>Size then
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Len:=Size;
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Move(S[1],Buffer^,Len);
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Result:=Len;
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end;
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procedure ShowException(ExceptObject: TObject; ExceptAddr: Pointer);
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// use shortstring. On exception, the heap may be corrupt.
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Var
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Buf : ShortString;
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begin
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SetLength(Buf,ExceptionErrorMessage(ExceptObject,ExceptAddr,@Buf[1],255));
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If IsConsole Then
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writeln(Buf)
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else
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If Assigned(OnShowException) Then
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OnShowException (Buf);
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end;
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procedure Abort;
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begin
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Raise EAbort.Create(SAbortError) at Get_Caller_addr(Get_Frame)
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end;
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procedure OutOfMemoryError;
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begin
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Raise OutOfMemory;
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end;
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procedure Beep;
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begin
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{$ifdef win32}
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MessageBeep(0);
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{$else}
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{$endif}
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end;
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{ Initialization code. }
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Initialization
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InitExceptions; { Initialize exceptions. OS independent }
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InitInternational; { Initialize internationalization settings }
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Finalization
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OutOfMemory.Free;
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InValidPointer.Free;
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end.
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{
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$Log$
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Revision 1.47 2000-06-22 18:05:18 michael
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+ Added ExceptObject, ExceptAddr,ExceptionErrorMessage
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ShowException Abort; OutOfMemoryError; Beep;
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Revision 1.46 2000/06/11 07:07:23 peter
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+ TSysCharSet
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Revision 1.45 2000/04/24 13:34:29 peter
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* added enhancedraise define
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Revision 1.43 2000/03/30 13:54:15 pierre
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No stack check inside CatchUnhandledException
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Revision 1.42 2000/02/10 22:56:43 florian
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* quick hack for stack trace in the case of an unhandled exception
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Revision 1.41 2000/02/09 16:59:33 peter
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* truncated log
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Revision 1.40 2000/01/16 19:10:25 hajny
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* 'uses Dos' added for OS/2 target
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Revision 1.39 2000/01/07 16:41:44 daniel
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* copyright 2000
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Revision 1.38 1999/12/26 19:30:53 hajny
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* OS/2 target added to the uses clause
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Revision 1.36 1999/11/15 21:49:47 peter
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* exception address fixes
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Revision 1.35 1999/11/06 14:41:31 peter
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* truncated log
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Revision 1.34 1999/10/30 17:39:05 peter
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* memorymanager expanded with allocmem/reallocmem
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Revision 1.33 1999/10/26 12:29:07 peter
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* assert handler must use shortstring
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Revision 1.32 1999/09/15 20:26:30 florian
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* patch from Sebastian Guenther applied: TMethod implementation
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Revision 1.31 1999/08/28 14:53:27 florian
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* bug 471 fixed: run time error 2 is now converted into a file not
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found exception
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Revision 1.30 1999/08/18 11:28:24 michael
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* Fixed reallocmem bug 535
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Revision 1.29 1999/07/27 13:01:12 peter
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+ filerec,textrec declarations
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} |