home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
DP Tool Club 19
/
CD_ASCQ_19_010295.iso
/
dos
/
prg
/
pas
/
swag
/
misc.swg
/
0011_PATCHEXE.PAS.pas
< prev
next >
Wrap
Pascal/Delphi Source File
|
1993-05-28
|
3KB
|
76 lines
{
>If this cannot be done, then hhow can one include a pcx directly inside
>the compiled File???
There's a trick to do that :
Suppose your Program is called PROG.EXE and your PCX File IMAGE.PCX
After each compile of PROG.EXE, do :
COPY /B PROG.EXE+IMAGE.PCX
Then, when you want to display the PCX, open the EXE File, read it's
header :
}
Function GetExeSize(ExeName:String; Var TotSize,Expect:LongInt):Boolean;
{ returns True if EXE is already bind }
Type
ExeHeaderRec = Record {Information describing EXE File}
Signature : Word; {EXE File signature}
LengthRem : Word; {Number of Bytes in last page of EXE image
LengthPages : Word; {Number of 512 Byte pages in EXE image}
NumReloc : Word; {Number of relocation items}
HeaderSize : Word; {Number of paraGraphs in EXE header}
MinHeap,MaxHeap : Word; {ParaGraphs to keep beyond end of image}
StackSeg,StackPtr : Word; {Initial SS:SP, StackSeg relative to image
CheckSum : Word; {EXE File check sum, not used}
IpInit, CodeSeg : Word; {Initial CS:IP, CodeSeg relative to image
RelocOfs : Word; {Bytes into EXE For first relocation item}
OverlayNum : Word; {Overlay number, not used here}
end;
Var
ExeF : File;
ExeHeader : ExeHeaderRec;
ExeValue : LongInt;
count : Word;
begin
TotSize:=0; Expect:=0;
Assign(ExeF,ExeName); Reset(ExeF,1);
if IoResult=0 then
begin
TotSize:=FileSize(ExeF);
BlockRead(ExeF,ExeHeader,SizeOf(ExeHeaderRec),Count);
With ExeHeader do
if Signature=$5A4D then
begin
if LengthRem=0 then
ExeValue:=LongInt(LengthPages) shl 9
else
ExeValue:=(LongInt(Pred(LengthPages)) shl 9)
Expect:=ExeValue;
end;
end;
Close(ExeF);
GetExeSize:=(TotSize<>Expect);
end;
{
If GetExeSize returns True, your PCX has been placed at the end of the
EXE (you did not forget :)) and all you have to do next is skip the
Program itself : Seek(ExeF,Expect);
Then starts your PCX. If you know in advance the sizes of the PCX
File, you can place any data you want (including lots of PCX) at the
end of your EXE.
This example is taken from a Unit I wrote a long time ago (was called
Caravane) and it worked very well. I accessed the end of my exe File
like a normal Typed File. Quite funny but I do not use this anymore.
Note that you can LzExe or Pklite the EXE part (not the PCX one). You
can DIET both parts With the resident version.
I hope the Function GetExeSize is not copyrighted since it is much too
commented to be one of my work :)