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b07bf6104d
bytes to move is greater than 0. This prevents RTE201's when compiled with range checks enabled.
139 lines
3.6 KiB
PHP
139 lines
3.6 KiB
PHP
{
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*********************************************************************
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$Id$
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Copyright (C) 1997, 1998 Gertjan Schouten
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*********************************************************************
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System Utilities For Free Pascal
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}
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{ PChar functions }
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type
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pbyte = ^byte;
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CharArray = array[0..0] of char;
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{ Processor dependent part, shared withs strings unit }
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{$i strings.inc }
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{ Processor independent part, shared with strings unit }
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{$i stringsi.inc }
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{ StrPas converts a PChar to a pascal string }
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function StrPas(Str: PChar): string;
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var
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l: Integer;
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begin
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l := StrLen(Str);
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SetLength(result, l);
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if l > 0 then
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Move(Str^, result[1], l);
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end ;
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{ StrAlloc allocates a buffer of Size + 4
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the size of the allocated buffer is stored at result - 4
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StrDispose should be used to destroy the buffer }
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function StrAlloc(Size: cardinal): PChar;
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begin
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inc(size,sizeof(cardinal));
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getmem(result,size);
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cardinal(pointer(result)^):=size;
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inc(result,sizeof(cardinal));
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end;
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{ Allocates a new string using StrAlloc, you need StrDispose to dispose the
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string }
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function strnew(p : pchar) : pchar;
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var
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len : longint;
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begin
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strnew:=nil;
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if (p=nil) or (p^=#0) then
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exit;
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len:=strlen(p)+1;
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StrNew:=StrAlloc(Len);
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if strnew<>nil then
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strmove(strnew,p,len);
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end;
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{ StrPCopy copies the pascal string Source to Dest and returns Dest }
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function StrPCopy(Dest: PChar; Source: string): PChar;
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begin
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result := StrMove(Dest, PChar(Source), length(Source)+1);
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end ;
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{ StrPLCopy copies MaxLen or less characters from the pascal string
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Source to Dest and returns Dest }
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function StrPLCopy(Dest: PChar; Source: string; MaxLen: cardinal): PChar;
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var Count: cardinal;
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begin
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result := Dest;
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if (Result <> Nil) and (MaxLen <> 0) then begin
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Count := Length(Source);
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if Count > MaxLen then
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Count := MaxLen;
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StrMove(Dest, PChar(Source), Count);
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CharArray(result^)[Count] := #0; { terminate ! }
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end ;
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end ;
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{ StrDispose clears the memory allocated with StrAlloc }
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procedure StrDispose(Str: PChar);
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begin
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if (Str <> Nil) then
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begin
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dec(Str,sizeof(cardinal));
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Freemem(str,cardinal(pointer(str)^));
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end;
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end;
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{ StrBufSize returns the amount of memory allocated for pchar Str allocated with StrAlloc }
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function StrBufSize(Str: PChar): cardinal;
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begin
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if Str <> Nil then
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result := cardinal(pointer(Str - SizeOf(cardinal))^)-sizeof(cardinal)
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else
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result := 0;
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end ;
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{
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$Log$
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Revision 1.4 2001-07-30 10:21:09 sg
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* Two moves with a string as target are now only exectuted if the number of
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bytes to move is greater than 0. This prevents RTE201's when compiled
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with range checks enabled.
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Revision 1.3 2000/11/23 11:04:26 sg
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* Protected some Move()'s by 'if' clauses so that the Move won't be
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executed when the length would be 0. Otherwise, the corresponding
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routines might get an RTE when compiled with $R+.
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Revision 1.2 2000/07/13 11:33:51 michael
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+ removed logs
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}
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