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| //------------------------------------------------------------------------------
// Auteur : Stéphane Prévot dit Shai Le Troll, le Collègue de Shon -
//------------------------------------------------------------------------------
unit uCrossFile;
interface
uses
Windows, Messages, SysUtils, Classes, Math, Grids;
{ TFileCross }
type
TFileCross = class;
PCrossFormatHeaderItemFile = ^TCrossFormatHeaderItemFile;
TCrossFormatHeaderItemFile = packed record
Position: TPoint;
Length: Integer;
end;
PCrossFormatItemFile = ^TCrossFormatItemFile;
TCrossFormatItemFile = packed record
Header: TCrossFormatHeaderItemFile;
Data: array of Byte;
end;
TFileCrossProgressEvent = procedure(Filer: TFileCross; var Position, Step, Size: Integer) of object;
TCrossStringList = class(TList)
private
FMaxCount: TPoint;
function Get(Index: Integer): TStrings;
procedure Put(Index: Integer; Item: TStrings);
public
constructor Create();
destructor Destroy(); override;
procedure Clear(); override;
function Add(): Integer;
procedure Delete(Index: Integer);
property Items[Index: Integer]: TStrings read Get write Put; default;
property MaxCount: TPoint read FMaxCount;
end;
TFileCross = class(TObject)
private
FList: TCrossStringList;
FStringGrid: TStringGrid;
FPosition: Integer;
FSize: Integer;
FOnProgress: TFileCrossProgressEvent;
procedure DoProgress(Step: Integer);
public
constructor Create();
destructor Destroy(); override;
procedure Clear();
function LoadFromFile(const FileName: string): Cardinal;
function SaveToFile(const FileName: string): Cardinal;
property StringGrid: TStringGrid read FStringGrid write FStringGrid;
property OnProgress: TFileCrossProgressEvent read FOnProgress write FOnProgress;
property Items: TCrossStringList read FList;
end;
TStringGridCrossManager = class(TObject)
private
FFileCross: TFileCross;
FStringGrid: TStringGrid;
FOnClear: TNotifyEvent;
FOnProgress: TFileCrossProgressEvent;
FFileDuration: Cardinal;
function DoClear(): Cardinal;
public
constructor Create(StringGrid: TStringGrid);
destructor Destroy(); override;
function LoadFromFile(const FileName: string): Cardinal;
function SaveToFile(const FileName: string): Cardinal;
property StringGrid: TStringGrid read FStringGrid write FStringGrid;
property OnClear: TNotifyEvent read FOnClear write FOnClear;
property OnProgress: TFileCrossProgressEvent read FOnProgress write FOnProgress;
property FileDuration: Cardinal read FFileDuration;
end;
implementation
{ TCrossStringList}
//------------------------------------------------------------------------------
constructor TCrossStringList.Create();
begin
inherited Create();
end;
//------------------------------------------------------------------------------
destructor TCrossStringList.Destroy();
begin
Clear();
inherited Destroy();
end;
//------------------------------------------------------------------------------
procedure TCrossStringList.Clear();
var
il: integer;
begin
for il := 0 to Count - 1 do
begin
if Assigned(inherited Items[il]) then
begin
TStringList(inherited Items[il]).Free();
end;
end;
inherited Clear();
end;
//------------------------------------------------------------------------------
function TCrossStringList.Get(Index: Integer): TStrings;
begin
Result := TStrings(inherited Items[Index]);
end;
//------------------------------------------------------------------------------
procedure TCrossStringList.Put(Index: Integer; Item: TStrings);
begin
inherited Items[Index] := Item;
end;
//------------------------------------------------------------------------------
function TCrossStringList.Add(): Integer;
begin
Result := inherited Add(TStringList.Create());
end;
//------------------------------------------------------------------------------
procedure TCrossStringList.Delete(Index: Integer);
begin
if (Index < 0) or (Index >= Count) then
begin
if Assigned(inherited Items[Index]) then
begin
TStrings(inherited Items[Index]).Free();
end;
inherited Delete(Index);
end;
end;
{ TFileCross }
//------------------------------------------------------------------------------
constructor TFileCross.Create();
begin
inherited Create();
FList := TCrossStringList.Create();
end;
//------------------------------------------------------------------------------
destructor TFileCross.Destroy();
begin
FList.Free();
inherited Destroy();
end;
//------------------------------------------------------------------------------
procedure TFileCross.Clear();
begin
if Assigned(FList) then
begin
FList.Clear();
end;
end;
//------------------------------------------------------------------------------
procedure TFileCross.DoProgress(Step: Integer);
begin
Inc(FPosition, Step);
if Assigned(FOnProgress) then
begin
FOnProgress(Self, FPosition, Step, FSize);
end;
end;
//------------------------------------------------------------------------------
function TFileCross.LoadFromFile(const FileName: string): Cardinal;
var
iX, iY, iMaxX, iMaxY, OldX, OldY, IndexX, IndexY: Integer;
CrossFile: file;
ItemHeader: TCrossFormatHeaderItemFile;
StrItem: string;
AmtTransferred: Integer;
StartTick, EndTick, TickPerSec: Int64;
begin
Result := 0;
QueryPerformanceCounter(StartTick);
try
Clear();
iMaxY := 0;
iMaxX := 0;
IndexY := 0;
IndexX := 0;
AssignFile(CrossFile, FileName);
Reset(CrossFile, 1);
try
FPosition := 0;
FSize := FileSize(CrossFile);
DoProgress(0);
while not EOF(CrossFile) do
begin
BlockRead(CrossFile, ItemHeader, SizeOf(ItemHeader), AmtTransferred);
if AmtTransferred < SizeOf(ItemHeader) then
begin
Exit;
end;
DoProgress(AmtTransferred);
SetLength(StrItem, ItemHeader.Length);
BlockRead(CrossFile, StrItem[1], ItemHeader.Length, AmtTransferred);
if AmtTransferred < ItemHeader.Length then
begin
Exit;
end;
DoProgress(AmtTransferred);
if FList.Count <= ItemHeader.Position.Y then
begin
OldY := FList.Count;
if FList.Capacity < ItemHeader.Position.Y then
FList.Capacity := ItemHeader.Position.Y;
for iY := OldY to ItemHeader.Position.Y do
begin
IndexY := FList.Add();
end;
end
else
begin
IndexY := ItemHeader.Position.Y;
end;
iMaxY := Max(iMaxY, IndexY);
if FList[IndexY].Count <= ItemHeader.Position.X then
begin
OldX := FList[IndexY].Count;
if FList[IndexY].Capacity < ItemHeader.Position.X then
FList[IndexY].Capacity := ItemHeader.Position.X;
for iX := OldX to ItemHeader.Position.X do
begin
IndexX := FList[IndexY].Add('');
end;
end
else
begin
IndexX := ItemHeader.Position.X;
end;
iMaxX := Max(iMaxX, IndexX);
FList[IndexY][IndexX] := StrItem;
end;
finally
FList.FMaxCount.Y := iMaxY;
FList.FMaxCount.X := iMaxX;
CloseFile(CrossFile);
end;
finally
QueryPerformanceCounter(EndTick);
QueryPerformanceFrequency(TickPerSec);
Result := Round((EndTick - StartTick) / TickPerSec * 1000);
end;
end;
//------------------------------------------------------------------------------
function TFileCross.SaveToFile(const FileName: string): Cardinal;
var
iX, iY, iMinX, iMinY, iMaxX, iMaxY: Integer;
CrossFile: file;
ItemHeader: TCrossFormatHeaderItemFile;
StrItem: string;
StartTick, EndTick, TickPerSec: Int64;
YStrings: TStrings;
function _RowStart(): Integer;
begin
if Assigned(FStringGrid) then
Result := FStringGrid.FixedRows
else
Result := 0;
end;
function _ColStart(): Integer;
begin
if Assigned(FStringGrid) then
Result := FStringGrid.FixedCols
else
Result := 0;
end;
function _RowCount(): Integer;
begin
if Assigned(FStringGrid) then
Result := FStringGrid.RowCount
else
Result := FList.Count;
end;
function _Rows(Index: Integer): TStrings;
begin
if Assigned(FStringGrid) then
Result := FStringGrid.Rows[Index]
else
Result := FList.Items[Index];
end;
begin
QueryPerformanceCounter(StartTick);
AssignFile(CrossFile, FileName);
// Nouveau Fichier
Rewrite(CrossFile, 1);
try
iMaxY := FList.Count - 1;
iMaxX := 0;
iMinX := _ColStart();
iMinY := _RowStart();
for iY := 1 to iMaxY do
begin
iMaxX := Max(iMaxX, FList[iY].Count - 1);
end;
FList.FMaxCount.Y := iMaxY;
FList.FMaxCount.X := iMaxX;
FPosition := 0;
FSize := iMaxY * iMaxX;
DoProgress(0);
// Je commence par 1 pour Obtenir que les Données
for iY := iMinY to _RowCount() - 1 do
begin
YStrings := _Rows(iY);
for iX := iMinX to YStrings.Count - 1 do
begin
DoProgress(1);
StrItem := YStrings.Strings[iX];
if StrItem <> '' then
begin
ItemHeader.Length := Length(StrItem);
ItemHeader.Position.X := iX - iMinX;
ItemHeader.Position.Y := iY - iMinY;
BlockWrite(CrossFile, ItemHeader, SizeOf(ItemHeader));
BlockWrite(CrossFile, StrItem[1], ItemHeader.Length);
end;
end;
end;
finally
CloseFile(CrossFile);
QueryPerformanceCounter(EndTick);
QueryPerformanceFrequency(TickPerSec);
Result := Round((EndTick - StartTick) / TickPerSec * 1000);
end;
end;
{ TStringGridCrossManager }
//------------------------------------------------------------------------------
constructor TStringGridCrossManager.Create(StringGrid: TStringGrid);
begin
inherited Create();
FFileCross := TFileCross.Create();
FStringGrid:= StringGrid;
end;
//------------------------------------------------------------------------------
destructor TStringGridCrossManager.Destroy;
begin
FFileCross.Free();
inherited;
end;
//------------------------------------------------------------------------------
function TStringGridCrossManager.DoClear: Cardinal;
var
StartTick, EndTick, TickPerSec: Int64;
begin
QueryPerformanceCounter(StartTick);
try
if Assigned(FOnClear) then
begin
FOnClear(Self);
end;
finally
QueryPerformanceCounter(EndTick);
QueryPerformanceFrequency(TickPerSec);
Result := Round((EndTick - StartTick) / TickPerSec * 1000);
end;
end;
//------------------------------------------------------------------------------
function TStringGridCrossManager.LoadFromFile(const FileName: string): Cardinal;
var
iRow, iX: Integer;
StartTick, EndTick, TickPerSec: Int64;
begin
Result := DoClear();
FFileCross.OnProgress := FOnProgress;
FFileDuration := FFileCross.LoadFromFile(FileName);
Result := Result + FFileDuration;
QueryPerformanceCounter(StartTick);
try
FStringGrid.RowCount := FFileCross.Items.MaxCount.Y + FStringGrid.FixedRows;
FStringGrid.ColCount := FFileCross.Items.MaxCount.X + FStringGrid.FixedCols;
for iRow := 0 to FFileCross.Items.Count - 1 do
begin
with FStringGrid.Rows[iRow + FStringGrid.FixedRows] do
begin
BeginUpdate();
for iX := 0 to FFileCross.Items[iRow].Count - 1 do
begin
Strings[iX + FStringGrid.FixedCols] := FFileCross.Items[iRow][iX];
end;
EndUpdate();
end;
end;
finally
QueryPerformanceCounter(EndTick);
QueryPerformanceFrequency(TickPerSec);
Result := Result + Round((EndTick - StartTick) / TickPerSec * 1000);
end;
end;
//------------------------------------------------------------------------------
function TStringGridCrossManager.SaveToFile(const FileName: string): Cardinal;
begin
FFileCross.OnProgress := FOnProgress;
FFileCross.StringGrid := StringGrid;
try
Result := FFileCross.SaveToFile(FileName);
finally
FFileCross.StringGrid := nil;
end;
FFileDuration := Result;
end;
end. |
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