83 lines
2.3 KiB
ObjectPascal
83 lines
2.3 KiB
ObjectPascal
unit XDeltaDLL;
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interface
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uses
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MemoryModule,
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WinAPI.Windows,
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System.SysUtils, System.Classes;
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type
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xd3_flags = (XD3_JUST_HDR = (1 shl 1), XD3_SKIP_WINDOW = (1 shl 2),
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XD3_SKIP_EMIT = (1 shl 3), XD3_FLUSH = (1 shl 4), XD3_SEC_DJW = (1 shl 5),
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XD3_SEC_FGK = (1 shl 6), XD3_SEC_LZMA = (1 shl 24),
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XD3_SEC_TYPE = (XD3_SEC_DJW or XD3_SEC_FGK or XD3_SEC_LZMA),
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XD3_SEC_NODATA = (1 shl 7), XD3_SEC_NOINST = (1 shl 8),
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XD3_SEC_NOADDR = (1 shl 9), XD3_SEC_NOALL = (XD3_SEC_NODATA or
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XD3_SEC_NOINST or XD3_SEC_NOADDR), XD3_ADLER32 = (1 shl 10),
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XD3_ADLER32_NOVER = (1 shl 11), XD3_NOCOMPRESS = (1 shl 13),
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XD3_BEGREEDY = (1 shl 14), XD3_ADLER32_RECODE = (1 shl 15),
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XD3_COMPLEVEL_SHIFT = 20, XD3_COMPLEVEL_MASK = ($F shl XD3_COMPLEVEL_SHIFT),
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XD3_COMPLEVEL_1 = (1 shl XD3_COMPLEVEL_SHIFT),
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XD3_COMPLEVEL_2 = (2 shl XD3_COMPLEVEL_SHIFT),
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XD3_COMPLEVEL_3 = (3 shl XD3_COMPLEVEL_SHIFT),
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XD3_COMPLEVEL_6 = (6 shl XD3_COMPLEVEL_SHIFT),
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XD3_COMPLEVEL_9 = (9 shl XD3_COMPLEVEL_SHIFT));
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var
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xd3_encode: function(const input: PByte; input_size: NativeUInt;
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source: PByte; source_size: NativeUInt; output_buffer: PByte;
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output_size: PNativeUInt; avail_output: NativeUInt; flags: Integer)
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: Integer cdecl;
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xd3_decode: function(const input: PByte; input_size: NativeUInt;
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source: PByte; source_size: NativeUInt; output_buf: PByte;
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output_size: PNativeUInt; avail_output: NativeUInt; flags: Integer)
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: Integer cdecl;
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DLLLoaded: boolean = False;
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implementation
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uses
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Utils;
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var
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DLLStream: TResourceStream;
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DLLHandle: TMemoryModule;
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procedure Init;
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begin
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{$IFDEF WIN32}
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DLLStream := TResourceStream.Create(HInstance, 'XDELTA86_DLL', RT_RCDATA);
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{$ELSE}
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DLLStream := TResourceStream.Create(HInstance, 'XDELTA64_DLL', RT_RCDATA);
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{$ENDIF}
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DLLHandle := MemoryLoadLibary(DLLStream.Memory);
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if Assigned(DLLHandle) then
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begin
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DLLLoaded := True;
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@xd3_encode := MemoryGetProcAddress(DLLHandle, 'xd3_encode');
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Assert(@xd3_encode <> nil);
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@xd3_decode := MemoryGetProcAddress(DLLHandle, 'xd3_decode');
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Assert(@xd3_decode <> nil);
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end
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else
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DLLLoaded := False;
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end;
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procedure Deinit;
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begin
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if not DLLLoaded then
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exit;
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MemoryFreeLibrary(DLLHandle);
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end;
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initialization
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Init;
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finalization
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Deinit;
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end.
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