⭐ 欢迎来到虫虫下载站！ | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站
📤 上传资源

📄 jclhashmaps.pas

📁 East make Tray Icon in delphi
💻 PAS
📖 第 1 页 / 共 4 页
字号:
🔍
1234 
    end;
    NewMap.FBuckets[I].Count := FBuckets[I].Count;
  end;
  Result := NewMap;
end;

function TJclStrStrHashMap.ContainsKey(const Key: string): Boolean;
var
  I: Integer;
  Bucket: PJclStrStrBucket;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := False;
  if Key = '' then
    Exit;
  Bucket := @FBuckets[FHashFunction(HashString(Key))];
  for I := 0 to Bucket.Count - 1 do
    if Bucket.Entries[I].Key = Key then
    begin
      Result := True;
      Break;
    end;
end;

function TJclStrStrHashMap.ContainsValue(const Value: string): Boolean;
var
  I, J: Integer;
  Bucket: PJclStrStrBucket;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := False;
  if Value = '' then
    Exit;
  for J := 0 to FCapacity - 1 do
  begin
    Bucket := @FBuckets[J];
    for I := 0 to Bucket.Count - 1 do
      if Bucket.Entries[I].Value = Value then
      begin
        Result := True;
        Exit;
      end;
  end;
end;

function TJclStrStrHashMap.Equals(AMap: IJclStrStrMap): Boolean;
var
  I, J: Integer;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := False;
  if AMap = nil then
    Exit;
  if FCount <> AMap.Size then
    Exit;
  Result := True;
  for I := 0 to FCapacity - 1 do
    for J := 0 to FBuckets[I].Count - 1 do
      if AMap.ContainsKey(FBuckets[I].Entries[J].Key) then
      begin
        if AMap.GetValue(FBuckets[I].Entries[J].Key) <>
          FBuckets[I].Entries[J].Value then
        begin
          Result := False;
          Exit;
        end;
      end
      else
      begin
        Result := False;
        Exit;
      end;
end;

function TJclStrStrHashMap.GetValue(const Key: string): string;
var
  I: Integer;
  Bucket: PJclStrStrBucket;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := '';
  if Key = '' then
    Exit;
  Bucket := @FBuckets[FHashFunction(HashString(Key))];
  for I := 0 to Bucket.Count - 1 do
    if Bucket.Entries[I].Key = Key then
    begin
      Result := Bucket.Entries[I].Value;
      Break;
    end;
end;

procedure TJclStrStrHashMap.GrowEntries(BucketIndex: Integer);
var
  Capacity: Integer;
begin
  Capacity := Length(FBuckets[BucketIndex].Entries);
  if Capacity > 64 then
    Capacity := Capacity + Capacity div 4
  else
    Capacity := Capacity * 4;
  SetLength(FBuckets[BucketIndex].Entries, Capacity);
end;

function TJclStrStrHashMap.HashMul(Key: Cardinal): Cardinal;
const
  A = 0.6180339887; // (sqrt(5) - 1) / 2
begin
  Result := Trunc(FCapacity * (Frac(Key * A)));
end;

function TJclStrStrHashMap.IsEmpty: Boolean;
begin
  Result := FCount = 0;
end;

function TJclStrStrHashMap.KeyOfValue(const Value: string): string;
var
  I, J: Integer;
  Bucket: PJclStrStrBucket;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  if Value = '' then
    Exit;
  for J := 0 to FCapacity - 1 do
  begin
    Bucket := @(FBuckets[J]);
    for I := 0 to Bucket.Count - 1 do
      if Bucket.Entries[I].Value = Value then
      begin
        Result := Bucket.Entries[I].Key;
        Exit;
      end;
  end;
  raise EJclError.CreateResFmt(@RsEValueNotFound, [Value]);
end;

function TJclStrStrHashMap.KeySet: IJclStrSet;
var
  I, J: Integer;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := TJclStrArraySet.Create(FCapacity);
  for I := 0 to FCapacity - 1 do
    for J := 0 to FBuckets[I].Count - 1 do
      Result.Add(FBuckets[I].Entries[J].Key);
end;

procedure TJclStrStrHashMap.PutAll(AMap: IJclStrStrMap);
var
  It: IJclStrIterator;
  Key: string;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  if AMap = nil then
    Exit;
  It := AMap.KeySet.First;
  while It.HasNext do
  begin
    Key := It.Next;
    PutValue(Key, AMap.GetValue(Key));
  end;
end;

procedure TJclStrStrHashMap.PutValue(const Key, Value: string);
var
  Index: Integer;
  Bucket: PJclStrStrBucket;
  I: Integer;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  if Key = '' then
    Exit;
  if Value = '' then
    Exit;
  Index := FHashFunction(HashString(Key));
  Bucket := @FBuckets[Index];
  for I := 0 to Bucket.Count - 1 do
    if Bucket.Entries[I].Key = Key then
    begin
      Bucket.Entries[I].Value := Value;
      Exit;
    end;
  if Bucket.Count = Length(Bucket.Entries) then
    GrowEntries(Index);
  Bucket.Entries[Bucket.Count].Key := Key;
  Bucket.Entries[Bucket.Count].Value := Value;
  Inc(Bucket.Count);
  Inc(FCount);
end;

function TJclStrStrHashMap.Remove(const Key: string): string;
var
  Bucket: PJclStrStrBucket;
  I: Integer;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := '';
  if Key = '' then
    Exit;
  Bucket := @FBuckets[FHashFunction(HashString(Key))];
  for I := 0 to Bucket.Count - 1 do
    if Bucket.Entries[I].Key = Key then
    begin
      Result := Bucket.Entries[I].Value;
      if I < Length(Bucket.Entries) - 1 then
        System.Move(Bucket.Entries[I + 1], Bucket.Entries[I],
          (Bucket.Count - I) * SizeOf(TJclStrStrEntry));
      Dec(Bucket.Count);
      Break;
    end;
end;

function TJclStrStrHashMap.Size: Integer;
begin
  Result := FCount;
end;

function TJclStrStrHashMap.Values: IJclStrCollection;
var
  I, J: Integer;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := TJclStrArrayList.Create(FCapacity);
  for I := 0 to FCapacity - 1 do
    for J := 0 to FBuckets[I].Count - 1 do
      Result.Add(FBuckets[I].Entries[J].Value);
end;

function TJclStrStrHashMap.HashString(const Key: string): Cardinal;
var
  I: Integer;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := 0;
  for I := 1 to Length(Key) do
    Result := Result + Cardinal(Ord(Key[I]) * (I - 1) * 256);
end;

//=== { TJclStrHashMap } =====================================================

constructor TJclStrHashMap.Create(ACapacity: Integer = DefaultContainerCapacity;
  AOwnsObjects: Boolean = True);
var
  I: Integer;
begin
  inherited Create;
  FOwnsObjects := AOwnsObjects;
  if ACapacity < 0 then
    FCapacity := 0
  else
    FCapacity := ACapacity;
  SetLength(FBuckets, FCapacity);
  for I := 0 to FCapacity - 1 do
    SetLength(FBuckets[I].Entries, 1);
  FHashFunction := HashMul;
end;

destructor TJclStrHashMap.Destroy;
begin
  Clear;
  inherited Destroy;
end;

procedure TJclStrHashMap.Clear;
var
  I, J: Integer;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  for I := 0 to FCapacity - 1 do
  begin
    for J := 0 to FBuckets[I].Count - 1 do
    begin
      FBuckets[I].Entries[J].Key := '';
      FreeObject(FBuckets[I].Entries[J].Value);
    end;
    FBuckets[I].Count := 0;
  end;
  FCount := 0;
end;

function TJclStrHashMap.Clone: TObject;
var
  I, J: Integer;
  NewEntryArray: TJclStrEntryArray;
  NewMap: TJclStrHashMap;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  NewMap := TJclStrHashMap.Create(FCapacity, False);
  // Only one can have FOwnsObjects = True
  for I := 0 to FCapacity - 1 do
  begin
    NewEntryArray := NewMap.FBuckets[I].Entries;
    SetLength(NewEntryArray, Length(FBuckets[I].Entries));
    for J := 0 to FBuckets[I].Count - 1 do
    begin
      NewEntryArray[J].Key := FBuckets[I].Entries[J].Key;
      NewEntryArray[J].Value := FBuckets[I].Entries[J].Value;
    end;
    NewMap.FBuckets[I].Count := FBuckets[I].Count;
  end;
  Result := NewMap;
end;

function TJclStrHashMap.ContainsKey(const Key: string): Boolean;
var
  I: Integer;
  Bucket: PJclStrBucket;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := False;
  if Key = '' then
    Exit;
  Bucket := @FBuckets[FHashFunction(HashString(Key))];
  for I := 0 to Bucket.Count - 1 do
    if Bucket.Entries[I].Key = Key then
    begin
      Result := True;
      Break;
    end;
end;

function TJclStrHashMap.ContainsValue(Value: TObject): Boolean;
var
  I, J: Integer;
  Bucket: PJclStrBucket;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := False;
  if Value = nil then
    Exit;
  for J := 0 to FCapacity - 1 do
  begin
    Bucket := @FBuckets[J];
    for I := 0 to Bucket.Count - 1 do
      if Bucket.Entries[I].Value = Value then
      begin
        Result := True;
        Exit;
      end;
  end;
end;

function TJclStrHashMap.Equals(AMap: IJclStrMap): Boolean;
var
  I, J: Integer;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := False;
  if AMap = nil then
    Exit;
  if FCount <> AMap.Size then
    Exit;
  Result := True;
  for I := 0 to FCapacity - 1 do
    for J := 0 to FBuckets[I].Count - 1 do
      if AMap.ContainsKey(FBuckets[I].Entries[J].Key) then
      begin
        if AMap.GetValue(FBuckets[I].Entries[J].Key) <>
          FBuckets[I].Entries[J].Value then
        begin
          Result := False;
          Exit;
        end;
      end
      else
      begin
        Result := False;
        Exit;
      end;
end;

function TJclStrHashMap.GetValue(const Key: string): TObject;
var
  I: Integer;
  Bucket: PJclStrBucket;
  {$IFDEF THREADSAFE}
  CS: IInterface;
  {$ENDIF THREADSAFE}
begin
  {$IFDEF THREADSAFE}
  CS := EnterCriticalSection;
  {$ENDIF THREADSAFE}
  Result := nil;
  if Key = '' then
    Exit;
  I := FHashFunction(HashString(Key));
  Bucket := @FBuckets[I];
  for I := 0 to Bucket.Count - 1 do
    if Bucket.Entries[I].Key = Key then
    begin
      Result := Bucket.Entries[I].Value;
      Break;
    end;
end;

procedure TJclStrHashMap.FreeObject(var AObject: TObject);
begin
  if FOwnsObjects then
  begin
    AObject.Free;
    AObject := nil;
  end;
end;

procedure TJclStrHashMap.GrowEntries(BucketIndex: Integer);
var
  Capacity: Integer;
begin
  Capacity := Length(FBuckets[BucketIndex].Entries);
  if Capacity > 64 then
    Capacity := Capacity + Capacity div 4
  else
    Capacity := Capacity * 4;
  SetLength(FBuckets[BucketIndex].Entries, Capacity);
end;

function TJclStrHashMap.HashMul(Key: Cardinal): Cardinal;
const
  A = 0.6180339887; // (sqrt(5) - 1) / 2
begin
1234

⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -