问题
I am trying to compile my program but I am getting this error:
Undeclared indentifier 'StreamLn'
i even tried to download PSock.dcu and put it into the library but it doesnt compile, it looks like its compactible with delphi 5,
unit ResourceInfo;
interface
uses
Classes, SysUtils, Windows;
type
TResourceInfo = class;
TDfmMode = ( dfmData, dfmResource, dfmASCII, dfmBinary);
TDfm = class
private
FOwner: TResourceInfo;
FName: string;
FData: TStream;
procedure SetName(const Value: string);
procedure SetOwner(const Value: TResourceInfo);
public
constructor Create(AOwner: TResourceInfo);
destructor Destroy; override;
function SaveToFile(FileName: TFileName; Mode: TDfmMode): Boolean;
property Data: TStream read FData;
property Name: string read FName write SetName;
property Owner: TResourceInfo read FOwner write FOwner;
end; {TDfm}
TResourceInfo = class(TComponent)
private
FActive: Boolean;
FDfms: TList;
FExeFileName: TFileName;
FModule: THandle;
FOnActivate: TNotifyEvent;
FOnDeactivate: TNotifyEvent;
procedure SetExeFileName(const Value: TFileName);
procedure SetActive(const Value: Boolean);
function GetDfms(Index: Cardinal): TDfm;
function GetDfmCount: Cardinal;
protected
procedure Clear;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function AddDfm(const Name: string; AData: TMemoryStream): Integer;
procedure DeleteDfm(const Name: string);
property DfmCount: Cardinal read GetDfmCount;
property Dfms[Index: Cardinal]: TDfm read GetDfms;
procedure EnumDfmNames;
property Module: THandle read FModule;
published
property Active: Boolean read FActive write SetActive;
property ExeFileName: TFileName read FExeFileName write SetExeFileName;
property OnActivate: TNotifyEvent read FOnActivate write FOnActivate;
property OnDeactivate: TNotifyEvent read FOnDeactivate write FOnDeactivate;
end; {TResourceInfo}
procedure Register;
implementation
uses
Winsock;
resourcestring
rsErrorLoadingExeFile = 'An error ocurred loading file %s, it may not be an executable module';
procedure Register;
begin
RegisterComponents('+HCU', [TResourceInfo]);
end; {Register}
{ TResourceInfo }
function TResourceInfo.AddDfm(const Name: string; AData: TMemoryStream): Integer;
var
FDfm: TDfm;
begin
FDfm := TDfm.Create(Self);
FDfm.Name := Name;
FDfm.Data.Size := AData.Size;
FDfm.Data.Seek(0, 0);
AData.Seek(0, 0);
FDfm.Data.CopyFrom(AData, AData.Size);
Result := FDfms.Add(FDfm);
end; {TResourceInfo.AddDfm}
constructor TResourceInfo.Create(AOwner: TComponent);
begin
inherited;
FActive := False;
FDfms := TList.Create;
FModule := 0;
end; {TResourceInfo.Create}
destructor TResourceInfo.Destroy;
begin
Clear;
FDfms.Free;
inherited;
end; {TResourceInfo.Destroy}
function CB_EnumDfmNameProc(hModule: THandle; lpszType, lpszName: PChar; lParam: Integer): Boolean; stdcall;
var
ms: TMemoryStream;
rs: TResourceStream;
Buffer: array of Byte;
begin
with TResourceInfo(lParam) do
begin
rs := TResourceStream.Create(TResourceInfo(lParam).Module, lpszname, lpszType);
try
ms := TMemoryStream.Create;
try
try
SetLength(Buffer, 4);
rs.Read(Buffer[0], SizeOf(Buffer));
if string(Buffer) = 'TPF0' then
begin
rs.Seek(0, 0);
ObjectBinaryToText(rs, ms);
ms.Seek(0, 0);
AddDfm(StrPas(lpszName), ms);
end;
except
raise;
end;
finally
ms.Free;
end;
finally
rs.free;
end;
end;
Result := True;
end; {CB_EnumDfmNameProc}
procedure TResourceInfo.EnumDfmNames;
begin
if FModule > 0 then
EnumResourceNames(FModule, RT_RCDATA, @CB_EnumDfmNameProc, Integer(Self));
end; {TResourceInfo.EnumDfmNames}
procedure TResourceInfo.DeleteDfm(const Name: string);
var
i: Cardinal;
begin
if FDfms.Count > 0 then
for i := Pred(FDfms.Count) downto 0 do
if UpperCase(TDfm(FDfms[i]).Name) = UpperCase(Name) then
begin
FDfms.Delete(i);
Break;
end;
end; {TResourceInfo.DeleteDfm}
procedure TResourceInfo.SetActive(const Value: Boolean);
begin
if FActive <> Value then
begin
if Value then
begin
if FModule > 0 then
FreeLibrary(FModule);
(* LOAD_LIBRARY_AS_DATAFILE
If this value is given, the function does a simple mapping of the file into the
address space. Nothing is done relative to executing or preparing to execute the
code in the mapped file. The function loads the module as if it were a data file.
You can use the module handle that the function returns in this case with the Win32
functions that operate on resources. Use this flag when you want to load a DLL in
order to extract messages or resources from it, and have no intention of executing
its code.If this value is not given, the function maps the file into the address
space in the manner that is normal for an executable module. The behavior of the
function is then identical to that of LoadLibrary in this regard. *)
FModule := LoadLibraryEx(PChar(FExeFileName), 0, LOAD_LIBRARY_AS_DATAFILE);
if not (FModule >= 32) then
raise Exception.CreateFmt(rsErrorLoadingExeFile, [FExeFileName]);
if Assigned(FOnActivate) then
FOnActivate(Self);
end
else
begin
Clear;
if FModule > 0 then
begin
FreeLibrary(FModule);
FModule := 0;
end;
if Assigned(FOnDeactivate) then
FOnDeactivate(Self);
end;
FActive := Value;
end;
end; {TResourceInfo.SetActive}
procedure TResourceInfo.SetExeFileName(const Value: TFileName);
begin
if FExeFileName <> Value then
FExeFileName := Value;
end; {TResourceInfo.SetExeFileName}
function TResourceInfo.GetDfms(Index: Cardinal): TDfm;
begin
Result := TDfm(FDfms[Index]);
end; {TResourceInfo.GetDfms}
function TResourceInfo.GetDfmCount: Cardinal;
begin
Result := FDfms.Count;
end; {TResourceInfo.GetDfmCount}
procedure TResourceInfo.Clear;
begin
if FDfms.Count > 0 then
while FDfms.Count > 0 do
FDfms.Delete(0);
end; {TResourceInfo.Clear}
{ TDfm }
constructor TDfm.Create(AOwner: TResourceInfo);
begin
inherited Create;
FData := TMemoryStream.Create;
FName := '';
SetOwner(AOwner);
end; {TDfm.Create}
destructor TDfm.Destroy;
begin
FData.Free;
inherited;
end; {TDfm.Destroy}
function TDfm.SaveToFile(FileName: TFileName; Mode: TDfmMode): Boolean;
function EndOfStream(Stream: TStream): Boolean;
begin
with Stream do
Result := Position = Size;
end; {EndOfStream}
var
fs: TFileStream;
ms: TMemoryStream;
s: string;
i, j: Byte;
begin
fs := TFileStream.Create(FileName, fmCreate or fmShareExclusive);
try
FData.Seek(0, 0);
case Mode of
dfmASCII:
begin
ms := TMemoryStream.Create;
try
s := FName + ' RCDATA' + #13#10 + '{';
StreamLN(fs, s);
ObjectTextToBinary(FData, ms);
ms.Seek(0, 0);
while not EndOfStream(ms) do
begin
s := '''';
for i := 0 to 15 do
begin
if ms.Read(j, SizeOf(j)) = 0 then
Break;
s := Concat(s, Format('%2.2x', [j]));
if (i = 15) or EndOfStream(ms) then
s := Concat(s, '''')
else
s := Concat(s, ' ');
end;
if EndOfStream(ms) then
s := Concat(s, #13#10 + '}');
StreamLN(fs, s);
end;
finally
ms.Free;
end;
end;
dfmBinary:
ObjectTextToBinary(FData, fs);
end;
finally
fs.Free;
end;
end; {TDfm.SaveToFile}
procedure TDfm.SetName(const Value: string);
begin
if FName <> Value then
FName := Value;
end; {TDfm.SetName}
procedure TDfm.SetOwner(const Value: TResourceInfo);
begin
FOwner := Value;
end; {TDfm.SetOwner}
end.
How can I declare it successfully?
回答1:
Appears to me that WinSock unit does not have an StreamLn function (as PowerSock's PSock.pas unit uses Winsock as imported unit).
The StreamLn function in PSock.pas just adds an CRLF sequence to the string passed as parameter before calling the TStream.WriteBuffer method of the passed TStream parameter.
Here's the google cache snapshot from the Powersock's source code of PSock.pas
回答2:
You need to either implement this function, or add a unit where this function is declared to your uses section.
来源：https://stackoverflow.com/questions/32788374/how-to-correctly-declare-streamln