/source/utils/RegistryUtils.pas

  1unit RegistryUtils;
  2
  3interface
  4
  5uses
  6  Classes, Registry;
  7
  8const
  9  ERROR_SUCCESS = 0;
 10
 11  ERROR_REGISTRY_NOTASSIGNED = ERROR_SUCCESS - 1;
 12  ERROR_REGISTRY_OPENKEY     = ERROR_SUCCESS - 2;
 13  ERROR_REGISTRY_READWRITE   = ERROR_SUCCESS - 3;
 14
 15function RegistryReadValue(Section, Key : String; DefaultValue : Variant; AType : TVarType) : Variant;
 16function RegistryReadSections (Strings : TStrings; Key : string) : Boolean;
 17
 18function RegistryReadBoolean(Section, Key : String; DefaultValue : Boolean = false) : Boolean;
 19function RegistryReadInteger(Section, Key : String; DefaultValue : Integer = 0) : Integer;
 20function RegistryReadString(Section, Key : String; DefaultValue : String = '') : String;
 21function RegistryReadFloat(Section, Key : String; DefaultValue : Double = 0.0) : Double;
 22function RegistryReadDateTime(Section, Key : String; DefaultValue : TDateTime) : TDateTime;
 23
 24procedure RegistryWriteValue(Section, Key : String; Value : Variant; AType : TVarType);
 25
 26procedure RegistryWriteBoolean(Section, Key : String; Value : Boolean);
 27procedure RegistryWriteInteger(Section, Key : String; Value : Integer);
 28procedure RegistryWriteString(Section, Key : String; Value : String);
 29procedure RegistryWriteFloat(Section, Key : String; Value : Double);
 30procedure RegistryWriteDateTime(Section, Key : String; Value : TDateTime);
 31
 32var
 33  TheRegistry : TRegIniFile;
 34
 35implementation
 36
 37uses
 38  Windows, RegistryKeys, Variants, SysUtils;
 39
 40function RegistryReadBoolean(Section, Key : String; DefaultValue : Boolean = false) : Boolean;
 41begin
 42  result := RegistryReadValue(Section, Key, DefaultValue, varBoolean);
 43end;
 44
 45function RegistryReadInteger(Section, Key : String; DefaultValue : Integer = 0) : Integer;
 46begin
 47  result := RegistryReadValue(Section, Key, DefaultValue, varInteger);
 48end;
 49
 50function RegistryReadDateTime(Section, Key : String; DefaultValue : TDateTime) : TDateTime;
 51begin
 52  result := RegistryReadValue(Section, Key, DefaultValue, varDate);
 53end;
 54
 55function RegistryReadSections (Strings : TStrings; Key : string) : Boolean;
 56var
 57  s : string;
 58begin
 59  with TheRegistry do
 60    try
 61      s := Filename;
 62      if s = '' then
 63        s := REGISTRY_KEY_PRODUCT;
 64      Result := OpenKey (Key, False);
 65      if Result then
 66        begin
 67          ReadSections (Strings);
 68          CloseKey;
 69          OpenKey (s, False)
 70        end
 71    except
 72      Result := False
 73    end;
 74end;
 75
 76function RegistryReadString(Section, Key : String; DefaultValue : String = '') : String;
 77begin
 78  result := RegistryReadValue(Section, Key, DefaultValue, varUString);
 79end;
 80
 81function RegistryReadFloat(Section, Key : String; DefaultValue : Double = 0.0) : Double;
 82begin
 83  result := RegistryReadValue(Section, Key, DefaultValue, varDouble);
 84end;
 85
 86function RegistryReadValue(Section, Key : String; DefaultValue : Variant; AType : TVarType) : Variant;
 87begin
 88  case AType of
 89    varBoolean :
 90      result := TheRegistry.ReadBool(Section, Key, DefaultValue);
 91    varInteger :
 92      result := TheRegistry.ReadInteger(Section, Key, DefaultValue);
 93    varUString :
 94      result := TheRegistry.ReadString(Section, Key, DefaultValue);
 95    varSingle, varDouble :
 96      result := StrToFloat(TheRegistry.ReadString(Section, Key, FloatToStr(DefaultValue)));
 97    varDate :
 98      result := StrToDate(TheRegistry.ReadString(Section, Key, DateToStr(DefaultValue)));
 99  end;
100end;
101
102procedure RegistryWriteBoolean(Section, Key : String; Value : Boolean);
103begin
104  RegistryWriteValue(Section, Key, Value, varBoolean);
105end;
106
107procedure RegistryWriteInteger(Section, Key : String; Value : Integer);
108begin
109  RegistryWriteValue(Section, Key, Value, varInteger);
110end;
111
112procedure RegistryWriteString(Section, Key : String; Value : String);
113begin
114  RegistryWriteValue(Section, Key, Value, varUString);
115end;
116
117procedure RegistryWriteFloat(Section, Key : String; Value : Double);
118begin
119  RegistryWriteValue(Section, Key, Value, varDouble);
120end;
121
122procedure RegistryWriteDateTime(Section, Key : String; Value : TDateTime);
123begin
124  RegistryWriteValue(Section, Key, Value, varDate);
125end;
126
127
128procedure RegistryWriteValue(Section, Key : String; Value : Variant; AType : TVarType);
129begin
130  case AType of
131    varBoolean :
132      TheRegistry.WriteBool(Section, Key, Value);
133    varInteger :
134      TheRegistry.WriteInteger(Section, Key, Value);
135    varUString :
136      TheRegistry.WriteString(Section, Key, Value);
137    varSingle, varDouble :
138      TheRegistry.WriteString(Section, Key, FloatToStr(Value));
139    varDate :
140      TheRegistry.WriteString(Section, Key, DateToStr(Value));
141  end;
142end;
143
144initialization
145  TheRegistry := TRegIniFile.Create;
146  TheRegistry.OpenKey(REGISTRY_KEY_PRODUCT, true);
147
148finalization
149  if Assigned (TheRegistry) then begin
150    TheRegistry.CloseKey;
151    TheRegistry.Free
152  end;
153
154end.