Mega Code Archive
Use a lightweight replacement for TRegistry
<![CDATA[
Title: use a lightweight replacement for TRegistry?
unit MiniReg;
{
lightweight replacement for TRegistry. Does not use Classes or SysUtils. Intended
for space-limited applets where only the commonly used functions are necessary.
Returns True if Successful, else False.
Written by Ben Hochstrasser (bhoc@surfeu.ch).
This code is GPL.
}
// Function Examples:
procedure TForm1.Button1Click(Sender: TObject);
var
ba1, ba2: array of byte;
n: integer;
s: String;
d: Cardinal;
begin
setlength(ba1, 10);
for n := 0 to 9 do ba1[n] := byte(n);
RegSetString(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestString', 'TestMe');
RegSetExpandString(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestExpandString',
'%SystemRoot%\Test');
RegSetMultiString(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestMultiString',
'String1'#0'String2'#0'String3');
RegSetDword(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestDword', 7);
RegSetBinary(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestBinary', ba1);
RegGetString(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestString', s);
RegGetMultiString(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestMultiString', s);
RegGetExpandString(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestExpandString', s);
RegGetDWORD(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestDword', d);
RegGetBinary(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestBinary', s);
SetLength(ba2, Length(s));
for n := 1 to Length(s) do ba2[n-1] := byte(s[n]);
Button1.Caption := IntToStr(Length(ba2));
if RegKeyExists(HKEY_CURRENT_USER, 'Software\My Company\Test\foo') then
if RegValueExists(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestBinary') then
MessageBox(GetActiveWindow, 'OK', 'OK', MB_OK);
RegDelValue(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar\TestString');
RegDelKey(HKEY_CURRENT_USER, 'Software\My Company\Test\foo\bar');
RegDelKey(HKEY_CURRENT_USER, 'Software\My Company\Test\foo');
RegDelKey(HKEY_CURRENT_USER, 'Software\My Company\Test');
RegDelKey(HKEY_CURRENT_USER, 'Software\My Company');
if RegEnumKeys(HKEY_CURRENT_USER, 'Software\My Company', s) then
ListBox1.Text := s;
if RegEnumValues(HKEY_CURRENT_USER, 'Software\My Company', s) then
ListBox1.Text := s;
if RegConnect('\\server1', HKEY_LOCAL_MACHINE, RemoteKey) then
begin
RegGetString(RemoteKey, 'Software\My Company\Test\foo\bar\TestString', s);
RegDisconnect(RemoteKey);
end;
end;
interface
uses Windows;
function RegSetString(RootKey: HKEY; Name: String; Value: String): boolean;
function RegSetMultiString(RootKey: HKEY; Name: String; Value: String): boolean;
function RegSetExpandString(RootKey: HKEY; Name: String; Value: String): boolean;
function RegSetDWORD(RootKey: HKEY; Name: String; Value: Cardinal): boolean;
function RegSetBinary(RootKey: HKEY; Name: String; Value: Array of Byte): boolean;
function RegGetString(RootKey: HKEY; Name: String; Var Value: String): boolean;
function RegGetMultiString(RootKey: HKEY; Name: String; Var Value: String): boolean;
function RegGetExpandString(RootKey: HKEY; Name: String; Var Value: String): boolean;
function RegGetDWORD(RootKey: HKEY; Name: String; Var Value: Cardinal): boolean;
function RegGetBinary(RootKey: HKEY; Name: String; Var Value: String): boolean;
function RegGetValueType(RootKey: HKEY; Name: String; var Value: Cardinal): boolean;
function RegValueExists(RootKey: HKEY; Name: String): boolean;
function RegKeyExists(RootKey: HKEY; Name: String): boolean;
function RegDelValue(RootKey: HKEY; Name: String): boolean;
function RegDelKey(RootKey: HKEY; Name: String): boolean;
function RegConnect(MachineName: String; RootKey: HKEY; var RemoteKey: HKEY): boolean;
function RegDisconnect(RemoteKey: HKEY): boolean;
function RegEnumKeys(RootKey: HKEY; Name: String; var KeyList: String): boolean;
function RegEnumValues(RootKey: HKEY; Name: String; var ValueList: String): boolean;
implementation
function LastPos(Needle: Char; Haystack: String): integer;
begin
for Result := Length(Haystack) downto 1 do
if Haystack[Result] = Needle then
Break;
end;
function RegConnect(MachineName: String; RootKey: HKEY; var RemoteKey: HKEY): boolean;
begin
Result := (RegConnectRegistry(PChar(MachineName), RootKey, RemoteKey) = ERROR_SUCCESS);
end;
function RegDisconnect(RemoteKey: HKEY): boolean;
begin
Result := (RegCloseKey(RemoteKey) = ERROR_SUCCESS);
end;
function RegSetValue(RootKey: HKEY; Name: String; ValType: Cardinal; PVal: Pointer; ValSize: Cardinal): boolean;
var
SubKey: String;
n: integer;
dispo: DWORD;
hTemp: HKEY;
begin
Result := False;
n := LastPos('\', Name);
if n 0 then
begin
SubKey := Copy(Name, 1, n - 1);
if RegCreateKeyEx(RootKey, PChar(SubKey), 0, nil, REG_OPTION_NON_VOLATILE, KEY_WRITE,
nil, hTemp, @dispo) = ERROR_SUCCESS then
begin
SubKey := Copy(Name, n + 1, Length(Name) - n);
Result := (RegSetValueEx(hTemp, PChar(SubKey), 0, ValType, PVal, ValSize) = ERROR_SUCCESS);
RegCloseKey(hTemp);
end;
end;
end;
function RegGetValue(RootKey: HKEY; Name: String; ValType: Cardinal; var PVal: Pointer;
var ValSize: Cardinal): boolean;
var
SubKey: String;
n: integer;
MyValType: DWORD;
hTemp: HKEY;
Buf: Pointer;
BufSize: Cardinal;
begin
Result := False;
n := LastPos('\', Name);
if n 0 then
begin
SubKey := Copy(Name, 1, n - 1);
if RegOpenKeyEx(RootKey, PChar(SubKey), 0, KEY_READ, hTemp) = ERROR_SUCCESS then
begin
SubKey := Copy(Name, n + 1, Length(Name) - n);
if RegQueryValueEx(hTemp, PChar(SubKey), nil, @MyValType, nil, @BufSize) = ERROR_SUCCESS then
begin
GetMem(Buf, BufSize);
if RegQueryValueEx(hTemp, PChar(SubKey), nil, @MyValType, Buf, @BufSize) = ERROR_SUCCESS then
begin
if ValType = MyValType then
begin
PVal := Buf;
ValSize := BufSize;
Result := True;
end else
begin
FreeMem(Buf);
end;
end else
begin
FreeMem(Buf);
end;
end;
RegCloseKey(hTemp);
end;
end;
end;
function RegSetString(RootKey: HKEY; Name: String; Value: String): boolean;
begin
Result := RegSetValue(RootKey, Name, REG_SZ, PChar(Value + #0), Length(Value) + 1);
end;
function RegSetMultiString(RootKey: HKEY; Name: String; Value: String): boolean;
begin
Result := RegSetValue(RootKey, Name, REG_MULTI_SZ, PChar(Value + #0#0), Length(Value) + 2);
end;
function RegSetExpandString(RootKey: HKEY; Name: String; Value: String): boolean;
begin
Result := RegSetValue(RootKey, Name, REG_EXPAND_SZ, PChar(Value + #0), Length(Value) + 1);
end;
function RegSetDword(RootKey: HKEY; Name: String; Value: Cardinal): boolean;
begin
Result := RegSetValue(RootKey, Name, REG_DWORD, @Value, SizeOf(Cardinal));
end;
function RegSetBinary(RootKey: HKEY; Name: String; Value: Array of Byte): boolean;
begin
Result := RegSetValue(RootKey, Name, REG_BINARY, @Value[Low(Value)], length(Value));
end;
function RegGetString(RootKey: HKEY; Name: String; Var Value: String): boolean;
var
Buf: Pointer;
BufSize: Cardinal;
begin
Result := False;
if RegGetValue(RootKey, Name, REG_SZ, Buf, BufSize) then
begin
Dec(BufSize);
SetLength(Value, BufSize);
if BufSize 0 then
CopyMemory(@Value[1], Buf, BufSize);
FreeMem(Buf);
Result := True;
end;
end;
function RegGetMultiString(RootKey: HKEY; Name: String; Var Value: String): boolean;
var
Buf: Pointer;
BufSize: Cardinal;
begin
Result := False;
if RegGetValue(RootKey, Name, REG_MULTI_SZ, Buf, BufSize) then
begin
Dec(BufSize);
SetLength(Value, BufSize);
if BufSize 0 then
CopyMemory(@Value[1], Buf, BufSize);
FreeMem(Buf);
Result := True;
end;
end;
function RegGetExpandString(RootKey: HKEY; Name: String; Var Value: String): boolean;
var
Buf: Pointer;
BufSize: Cardinal;
begin
Result := False;
if RegGetValue(RootKey, Name, REG_EXPAND_SZ, Buf, BufSize) then
begin
Dec(BufSize);
SetLength(Value, BufSize);
if BufSize 0 then
CopyMemory(@Value[1], Buf, BufSize);
FreeMem(Buf);
Result := True;
end;
end;
function RegGetDWORD(RootKey: HKEY; Name: String; Var Value: Cardinal): boolean;
var
Buf: Pointer;
BufSize: Cardinal;
begin
Result := False;
if RegGetValue(RootKey, Name, REG_DWORD, Buf, BufSize) then
begin
CopyMemory(@Value, Buf, BufSize);
FreeMem(Buf);
Result := True;
end;
end;
function RegGetBinary(RootKey: HKEY; Name: String; Var Value: String): boolean;
var
Buf: Pointer;
BufSize: Cardinal;
begin
Result := False;
if RegGetValue(RootKey, Name, REG_BINARY, Buf, BufSize) then
begin
SetLength(Value, BufSize);
CopyMemory(@Value[1], Buf, BufSize);
FreeMem(Buf);
Result := True;
end;
end;
function RegValueExists(RootKey: HKEY; Name: String): boolean;
var
SubKey: String;
n: integer;
hTemp: HKEY;
begin
Result := False;
n := LastPos('\', Name);
if n 0 then
begin
SubKey := Copy(Name, 1, n - 1);
if RegOpenKeyEx(RootKey, PChar(SubKey), 0, KEY_READ, hTemp) = ERROR_SUCCESS then
begin
SubKey := Copy(Name, n + 1, Length(Name) - n);
Result := (RegQueryValueEx(hTemp, PChar(SubKey), nil, nil, nil, nil) = ERROR_SUCCESS);
RegCloseKey(hTemp);
end;
end;
end;
function RegGetValueType(RootKey: HKEY; Name: String; var Value: Cardinal): boolean;
var
SubKey: String;
n: integer;
hTemp: HKEY;
ValType: Cardinal;
begin
Result := False;
Value := REG_NONE;
n := LastPos('\', Name);
if n 0 then
begin
SubKey := Copy(Name, 1, n - 1);
if (RegOpenKeyEx(RootKey, PChar(SubKey), 0, KEY_READ, hTemp) = ERROR_SUCCESS) then
begin
SubKey := Copy(Name, n + 1, Length(Name) - n);
Result := (RegQueryValueEx(hTemp, PChar(SubKey), nil, @ValType, nil, nil) = ERROR_SUCCESS);
if Result then
Value := ValType;
RegCloseKey(hTemp);
end;
end;
end;
function RegKeyExists(RootKey: HKEY; Name: String): boolean;
var
SubKey: String;
n: integer;
hTemp: HKEY;
begin
Result := False;
n := LastPos('\', Name);
if n 0 then
begin
SubKey := Copy(Name, 1, n - 1);
if RegOpenKeyEx(RootKey, PChar(SubKey), 0, KEY_READ, hTemp) = ERROR_SUCCESS then
begin
Result := True;
RegCloseKey(hTemp);
end;
end;
end;
function RegDelValue(RootKey: HKEY; Name: String): boolean;
var
SubKey: String;
n: integer;
hTemp: HKEY;
begin
Result := False;
n := LastPos('\', Name);
if n 0 then
begin
SubKey := Copy(Name, 1, n - 1);
if RegOpenKeyEx(RootKey, PChar(SubKey), 0, KEY_WRITE, hTemp) = ERROR_SUCCESS then
begin
SubKey := Copy(Name, n + 1, Length(Name) - n);
Result := (RegDeleteValue(hTemp, PChar(SubKey)) = ERROR_SUCCESS);
RegCloseKey(hTemp);
end;
end;
end;
function RegDelKey(RootKey: HKEY; Name: String): boolean;
var
SubKey: String;
n: integer;
hTemp: HKEY;
begin
Result := False;
n := LastPos('\', Name);
if n 0 then
begin
SubKey := Copy(Name, 1, n - 1);
if RegOpenKeyEx(RootKey, PChar(SubKey), 0, KEY_WRITE, hTemp) = ERROR_SUCCESS then
begin
SubKey := Copy(Name, n + 1, Length(Name) - n);
Result := (RegDeleteKey(hTemp, PChar(SubKey)) = ERROR_SUCCESS);
RegCloseKey(hTemp);
end;
end;
end;
function RegEnum(RootKey: HKEY; Name: String; var ResultList: String; const DoKeys: Boolean): boolean;
var
i: integer;
iRes: integer;
s: String;
hTemp: HKEY;
Buf: Pointer;
BufSize: Cardinal;
begin
Result := False;
ResultList := '';
if RegOpenKeyEx(RootKey, PChar(Name), 0, KEY_READ, hTemp) = ERROR_SUCCESS then
begin
Result := True;
BufSize := 1024;
GetMem(buf, BufSize);
i := 0;
iRes := ERROR_SUCCESS;
while iRes = ERROR_SUCCESS do
begin
BufSize := 1024;
if DoKeys then
iRes := RegEnumKeyEx(hTemp, i, buf, BufSize, nil, nil, nil, nil)
else
iRes := RegEnumValue(hTemp, i, buf, BufSize, nil, nil, nil, nil);
if iRes = ERROR_SUCCESS then
begin
SetLength(s, BufSize);
CopyMemory(@s[1], buf, BufSize);
if ResultList = '' then
ResultList := s
else
ResultList := Concat(ResultList, #13#10, s);
inc(i);
end;
end;
FreeMem(buf);
RegCloseKey(hTemp);
end;
end;
function RegEnumValues(RootKey: HKEY; Name: String; var ValueList: String): boolean;
begin
Result := RegEnum(RootKey, Name, ValueList, False);
end;
function RegEnumKeys(RootKey: HKEY; Name: String; var KeyList: String): boolean;
begin
Result := RegEnum(RootKey, Name, KeyList, True);
end;
end.
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