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uIniStream.pas
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uIniStream.pas
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unit uIniStream;
interface
uses
Classes, inifiles;
type
TIniStream = class(TCustomIniFile)
private
FSections: TStringList;
FTargetStrings: TStrings;
function AddSection(const Section: string): TStrings;
procedure LoadValues(AStream: TStream);
public
constructor Create(AStream: TStream);
destructor Destroy; override;
procedure Clear;
procedure DeleteKey(const Section, Ident: string); override;
procedure EraseSection(const Section: string); override;
procedure GetStrings(List: TStrings);
procedure ReadSection(const Section: string; Strings: TStrings); override;
procedure ReadSections(Strings: TStrings); override;
procedure ReadSectionValues(const Section: string; Strings: TStrings); override;
function ReadString(const Section, Ident, Default: string): string; override;
procedure SetStrings(List: TStrings);
procedure UpdateFile; override;
procedure WriteString(const Section, Ident, Value: string); override;
property TargetStrings: TStrings read FTargetStrings write FTargetStrings;
end;
implementation
{ TIniStream }
function TIniStream.AddSection(const Section: string): TStrings;
var
i: integer;
begin
with FSections do begin
i := IndexOf(Section);
if i < 0 then begin
Result := TStringList.Create;
try
AddObject(Section, Result);
except
Result.Free;
result := nil;
end;
end else
result := TStrings(Objects[i]);
end;
end;
procedure TIniStream.Clear;
var
I: Integer;
begin
with FSections do begin
for I := 0 to Count - 1 do
TStrings(Objects[I]).Free;
Clear;
end;
end;
constructor TIniStream.Create(AStream: TStream);
begin
inherited Create('');
FSections := TStringList.Create;
if not Assigned(AStream) then
exit;
AStream.Seek(0, soFromBeginning);
LoadValues(AStream);
end;
procedure TIniStream.DeleteKey(const Section, Ident: string);
var
I, J: Integer;
Strings: TStrings;
begin
I := FSections.IndexOf(Section);
if I >= 0 then begin
Strings := TStrings(FSections.Objects[I]);
J := Strings.IndexOfName(Ident);
if J >= 0 then Strings.Delete(J);
end;
end;
destructor TIniStream.Destroy;
begin
if FTargetStrings <> nil then
GetStrings(FTargetStrings);
if FSections <> nil then Clear;
FSections.Free;
inherited;
end;
procedure TIniStream.EraseSection(const Section: string);
var
I: Integer;
begin
I := FSections.IndexOf(Section);
if I >= 0 then begin
TStrings(FSections.Objects[I]).Free;
FSections.Delete(I);
end;
end;
procedure TIniStream.GetStrings(List: TStrings);
var
I, J: Integer;
Strings: TStrings;
begin
List.BeginUpdate;
try
for I := 0 to FSections.Count - 1 do begin
List.Add('[' + FSections[I] + ']');
Strings := TStrings(FSections.Objects[I]);
for J := 0 to Strings.Count - 1 do List.Add(Strings[J]);
List.Add('');
end;
finally
List.EndUpdate;
end;
end;
procedure TIniStream.LoadValues(AStream: TStream);
var
List: TStringList;
begin
if Assigned(AStream) then begin
List := TStringList.Create;
try
List.LoadFromStream(AStream);
SetStrings(List);
finally
List.Free;
end;
end else
Clear;
end;
procedure TIniStream.ReadSection(const Section: string; Strings: TStrings);
var
I, J: Integer;
SectionStrings: TStrings;
begin
Strings.BeginUpdate;
try
Strings.Clear;
I := FSections.IndexOf(Section);
if I >= 0 then begin
SectionStrings := TStrings(FSections.Objects[I]);
for J := 0 to SectionStrings.Count - 1 do
Strings.Add(SectionStrings.Names[J]);
end;
finally
Strings.EndUpdate;
end;
end;
procedure TIniStream.ReadSections(Strings: TStrings);
begin
Strings.Assign(FSections);
end;
procedure TIniStream.ReadSectionValues(const Section: string; Strings: TStrings);
var
I: Integer;
begin
Strings.BeginUpdate;
try
Strings.Clear;
I := FSections.IndexOf(Section);
if I >= 0 then Strings.Assign(TStrings(FSections.Objects[I]));
finally
Strings.EndUpdate;
end;
end;
function TIniStream.ReadString(const Section, Ident, Default: string): string;
var
I: Integer;
Strings: TStrings;
begin
I := FSections.IndexOf(Section);
if I >= 0 then begin
Strings := TStrings(FSections.Objects[I]);
I := Strings.IndexOfName(Ident);
if I >= 0 then begin
Result := Copy(Strings[I], Length(Ident) + 2, Maxint);
Exit;
end;
end;
Result := Default;
end;
procedure TIniStream.SetStrings(List: TStrings);
var
I: Integer;
S: string;
Strings: TStrings;
begin
Clear;
Strings := nil;
for I := 0 to List.Count - 1 do begin
S := List[I];
if (S <> '') and (S[1] <> ';') then
if (S[1] = '[') and (S[Length(S)] = ']') then
Strings := AddSection(Copy(S, 2, Length(S) - 2))
else
if Strings <> nil then Strings.Add(S);
end;
end;
procedure TIniStream.UpdateFile;
begin
if FTargetStrings <> nil then
GetStrings(FTargetStrings);
end;
procedure TIniStream.WriteString(const Section, Ident, Value: string);
var
I: Integer;
S: string;
Strings: TStrings;
begin
I := FSections.IndexOf(Section);
if I >= 0 then
Strings := TStrings(FSections.Objects[I]) else
Strings := AddSection(Section);
S := Ident + '=' + Value;
I := Strings.IndexOfName(Ident);
if I >= 0 then Strings[I] := S else Strings.Add(S);
end;
end.