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8.14.6 Turbo Power compatibility, etc.

The following listing contains the interface of the GPCUtil unit.

This unit provides some utility routines for compatibility to some units available for BP, like some Turbo Power units.

 
{ Some utility routines for compatibility to some units available
  for BP, like some `Turbo Power' units.

@@NOTE - SOME OF THE ROUTINES IN THIS UNIT MAY NOT WORK CORRECTLY. TEST CAREFULLY AND USE WITH CARE!

Copyright (C) 1998-2002 Free Software Foundation, Inc.

Authors: Prof. Abimbola A. Olowofoyeku <African_Chief@bigfoot.com> Frank Heckenbach <frank@pascal.gnu.de>

This file is part of GNU Pascal.

GNU Pascal 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.

GNU Pascal 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 GNU Pascal; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

As a special exception, if you link this file with files compiled with a GNU compiler to produce an executable, this does not cause the resulting executable to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License. }

{$gnu-pascal,I-} {$if __GPC_RELEASE__ < 20011202} {$error This unit requires GPC release 20011202 or newer.} {$endif}

unit GPCUtil;

interface

uses GPC;

{ Replace all occurences of OldC with NewC in s and return the result } function ReplaceChar (const s: String; OldC, NewC: Char): TString;

{ Return the current working directory } function ThisDirectory: TString; asmname '_p_get_current_directory';

{ Does a directory exist? } function IsDirectory (const aFileName: String): Boolean; asmname '_p_directory_exists';

{ Break a string into 2 parts, using Ch as a marker } function BreakStr (const Src: String; var Dest1, Dest2: String; Ch: Char): Boolean;

{ Convert a CString to an Integer } function PChar2Int (s: CString): Integer;

{ Convert a CString to a LongInt } function PChar2Long (s: CString): LongInt;

{ Convert a CString to a Double } function PChar2Double (s: CString): Double;

{ Search for s as an executable in the path and return its location (full pathname) } function PathLocate (const s: String): TString;

{ Copy file Src to Dest and return the number of bytes written } function CopyFile (const Src, Dest: String; BufSize: Integer): LongInt;

{ Copy file Src to Dest and return the number of bytes written; report the number of bytes written versus total size of the source file } function CopyFileEx (const Src, Dest: String; BufSize: Integer; function Report (Reached, Total: LongInt): LongInt): LongInt;

{ Turbo Power compatibility }

{ Execute the program prog. Dummy1 and Dummy2 are for compatibility only; they are ignored. } function ExecDos (const Prog: String; Dummy1: Boolean; Dummy2: Pointer): Integer;

{ Return whether Src exists in the path as an executable -- if so return its full location in Dest } function ExistOnPath (const Src: String; var Dest: String): Boolean;

{ Does file name s exist? } function ExistFile (const aFileName: String): Boolean; asmname '_p_file_exists';

{ Return just the directory path of Path. Returns DirSelf + DirSeparator if Path contains no directory. } function JustPathName (const Path: String): TString; asmname '_p_dir_from_path';

{ Return just the file name part without extension of Path. Empty if Path contains no file name. } function JustFileName (const Path: String): TString; asmname '_p_name_from_path';

{ Return just the extension of Path. Empty if Path contains no extension. } function JustExtension (const Path: String): TString; asmname '_p_ext_from_path';

{ Change the extension of s to Ext (do not include the dot!) } function ForceExtension (const s, Ext: String): TString;

{ Return the full pathname of Path } function FullPathName (const Path: String): TString; asmname '_p_fexpand';

{ Add a DirSeparator to the end of s if there is not already one } function AddBackSlash (const s: String): TString; asmname '_p_forceadddirseparator';

{ Convert Integer to PChar; uses NewCString to allocate memory for the result, so you must call StrDispose to free the memory later } function Int2PChar (i: Integer): PChar;

{ Convert Integer to string } function Int2Str (i: Integer): TString;

{ Convert string to Integer } function Str2Int (const s: String; var i: Integer): Boolean;

{ Convert string to LongInt } function Str2Long (const s: String; var i: LongInt): Boolean;

{ Convert string to Double } function Str2Real (const s: String; var i: Double): Boolean;

{ Return a string stripped of leading spaces } function TrimLead (const s: String): TString; asmname '_p_trimleft_str';

{ Return a string stripped of trailing spaces } function TrimTrail (const s: String): TString; asmname '_p_trimright_str';

{ Return a string stripped of leading and trailing spaces } function Trim (const s: String): TString; asmname '_p_trimboth_str';

{ Return a string right-padded to length Len with ch } function PadCh (const s: String; ch: Char; Len: Integer): TString;

{ Return a string right-padded to length Len with spaces } function Pad (const s: String; Len: Integer): TString;

{ Return a string left-padded to length Len with ch } function LeftPadCh (const s: String; ch: Char; Len: Byte): TString;

{ Return a string left-padded to length Len with blanks } function LeftPad (const s: String; Len: Integer): TString;

{ Convert a string to lowercase } function StLoCase (const s: String): TString; asmname '_p_locase_str';

{ Convert a string to uppercase } function StUpCase (const s: String): TString; asmname '_p_upcase_str';

{ Uniform access to big memory blocks for GPC and BP. Of course, for programs that are meant only for GPC, you can use the usual New/Dispose routines. But for programs that should compile with GPC and BP, you can use the following routines for GPC. In the GPC unit for BP (gpc-bp.pas), you can find emulations for BP that try to provide access to as much memory as possible, despite the limitations of BP. The drawback is that this memory cannot be used freely, but only with the following moving routines. }

type PBigMem = ^TBigMem; TBigMem (MaxNumber: Integer) = record { Public fields } Number, BlockSize: SizeType; Mappable: Boolean; { Private fields } Pointers: array [1 .. MaxNumber] of ^Byte end;

{ Note: the number of blocks actually allocated may be smaller than WantedNumber. Check the Number field of the result. } function AllocateBigMem (WantedNumber, aBlockSize: SizeType; WantMappable: Boolean): PBigMem; procedure DisposeBigMem (p: PBigMem); procedure MoveToBigMem (var Source; p: PBigMem; BlockNumber: SizeType); procedure MoveFromBigMem (p: PBigMem; BlockNumber: SizeType; var Dest); { Maps a big memory block into normal addressable memory and returns its address. The memory must have been allocated with WantMappable = True. The mapping is only valid until the next MapBigMem call. } function MapBigMem (p: PBigMem; BlockNumber: SizeType): Pointer;


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