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unit Packer;
interface
uses Windows;
procedure CompressFile(FileName: string); overload;
procedure CompressFile(sfrom, sto: string); overload;
procedure DeCompressFile(FileName: string); overload;
procedure DeCompressFile(sfrom, sto: string); overload;
procedure DeCompressFile(filename: string; var pout: Pointer); overload;
procedure CompressFile(FileName: string; var pin: Pointer); overload;
function FileExists(const FileName: string): Boolean;
implementation
uses ZLib;
procedure DeCompressFile(filename: string; var pout: Pointer);
var
f: File of byte;
pIn: Pointer;
sizeRead,sizeWrite: integer;
begin
pIn := nil; pOut := nil;
assignfile(f, FileName);
reset(f);
try
getmem(pIn, FileSize(f));
BlockRead(f, pIn^, FileSize(f), sizeRead);
DeCompressBuf(pIn, sizeRead, sizeRead, pOut, sizeWrite);
finally
if pIn <> nil then freemem(pIn);
CloseFile(f);
end;
end;
function FileExists(const FileName: string): Boolean;
var
f: TWin32FindData;
handle: THandle;
begin
handle := FindFirstFile(pChar(FileName), f);
result := (handle <> INVALID_HANDLE_VALUE);
FindClose(Handle);
end;
procedure CompressFile(FileName: string; var pin: Pointer); overload;
var
f: File of byte;
pOut: Pointer;
sizeRead,sizeWrite: integer;
begin
pIn := nil; pOut := nil;
assignfile(f, FileName);
reset(f);
try
getmem(pIn, FileSize(f));
BlockRead(f, pIn^, FileSize(f), sizeRead);
CompressBuf(pIn, sizeRead, pOut, sizeWrite);
ReWrite(f);
BlockWrite(f, pOut^, sizeWrite);
finally
if pOut <> nil then freemem(pOut);
CloseFile(f);
end;
end;
procedure CompressFile(FileName: string); overload;
var
f: File of byte;
pIn,pOut: Pointer;
sizeRead,sizeWrite: integer;
begin
pIn := nil; pOut := nil;
assignfile(f, FileName);
reset(f);
try
getmem(pIn, FileSize(f));
BlockRead(f, pIn^, FileSize(f), sizeRead);
CompressBuf(pIn, sizeRead, pOut, sizeWrite);
ReWrite(f);
BlockWrite(f, pOut^, sizeWrite);
finally
if pIn <> nil then freemem(pIn);
if pOut <> nil then freemem(pOut);
CloseFile(f);
end;
end;
procedure DeCompressFile(FileName: string); overload;
var
f: File of byte;
pIn,pOut: Pointer;
sizeRead,sizeWrite: integer;
begin
pIn := nil; pOut := nil;
assignfile(f, FileName);
reset(f);
try
getmem(pIn, FileSize(f));
BlockRead(f, pIn^, FileSize(f), sizeRead);
DeCompressBuf(pIn, sizeRead, sizeRead, pOut, sizeWrite);
ReWrite(f);
BlockWrite(f, pOut^, sizeWrite);
finally
if pIn <> nil then freemem(pIn);
if pOut <> nil then freemem(pOut);
CloseFile(f);
end;
end;
procedure CompressFile(sfrom, sto: string); overload;
begin
if FileExists(sto) then DeleteFile(pchar(sto));
CopyFile(pchar(sfrom), pchar(sto), true);
CompressFile(sto);
end;
procedure DeCompressFile(sfrom, sto: string); overload;
begin
if FileExists(sto) then DeleteFile(pchar(sto));
CopyFile(pchar(sfrom), pchar(sto), true);
DeCompressFile(sto);
end;
end.
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