具有讽刺意味的是，就在昨晚我为此写了一些东西，而就在不久前，我发现这得到了投票。这是我刚刚写的一个封装这个的类：
unit CmdLine;
(*
Command Line Parser
by Jerry Dodge
Class: TCmdLine
- Parses out a command line into individual name/value pairs
- Concatenates name/value pairs into a command line string
- Property "ModuleFilename" for the current executable path
- Property "OpenFilename" for the file to be opened, if any
- Default property "Values" to read/write name/value pairs
*)
interface
uses
System.Classes, System.SysUtils;
type
TCmdLine = class(TObject)
private
FItems: TStringList;
FModuleFilename: String;
FOpenFilename: String;
function GetAsString: String;
procedure SetAsString(const Value: String);
procedure SetModuleFilename(const Value: String);
procedure SetOpenFilename(const Value: String);
function GetValue(const Name: String): String;
procedure SetValue(const Name, Value: String);
function GetName(const Index: Integer): String;
public
constructor Create;
destructor Destroy; override;
function Count: Integer;
function Exists(const N: String; const IgnoreCase: Boolean = False): Boolean;
property ModuleFilename: String read FModuleFilename write SetModuleFilename;
property OpenFilename: String read FOpenFilename write SetOpenFilename;
property AsString: String read GetAsString write SetAsString;
property Names[const Index: Integer]: String read GetName;
property Values[const Name: String]: String read GetValue write SetValue; default;
end;
implementation
{ TCmdLine }
constructor TCmdLine.Create;
begin
FItems:= TStringList.Create;
end;
destructor TCmdLine.Destroy;
begin
FItems.Free;
inherited;
end;
function TCmdLine.Count: Integer;
begin
Result:= FItems.Count;
end;
function TCmdLine.Exists(const N: String; const IgnoreCase: Boolean = False): Boolean;
var
X: Integer;
begin
Result:= False;
for X := 0 to FItems.Count-1 do begin
if IgnoreCase then begin
if SameText(N, FItems.Names[X]) then begin
Result:= True;
Break;
end;
end else begin
if N = FItems.Names[X] then begin
Result:= True;
Break;
end;
end;
end;
end;
procedure TCmdLine.SetModuleFilename(const Value: String);
begin
FModuleFilename:= Value;
end;
procedure TCmdLine.SetOpenFilename(const Value: String);
begin
FOpenFilename:= Value;
end;
function TCmdLine.GetValue(const Name: String): String;
begin
Result:= FItems.Values[Name];
end;
procedure TCmdLine.SetValue(const Name, Value: String);
begin
FItems.Values[Name]:= Value;
end;
function TCmdLine.GetAsString: String;
var
X: Integer;
Cmd: String;
Val: String;
begin
Result:= '"'+FModuleFilename+'"';
if Trim(FOpenFilename) <> '' then
Result:= Result + ' "'+FOpenFilename+'"';
for X := 0 to FItems.Count-1 do begin
Cmd:= FItems.Names[X];
Val:= FItems.Values[Cmd];
Result:= Result + ' -'+Cmd;
if Trim(Val) <> '' then begin
Result:= Result + ' ';
if Pos(' ', Val) > 0 then
Result:= Result + '"'+Val+'"'
else
Result:= Result + Val;
end;
end;
end;
function TCmdLine.GetName(const Index: Integer): String;
begin
Result:= FItems.Names[Index];
end;
procedure TCmdLine.SetAsString(const Value: String);
var
Str: String;
Tmp: String;
Cmd: String;
Val: String;
P: Integer;
begin
FItems.Clear;
FModuleFilename:= '';
FOpenFilename:= '';
Str:= Trim(Value) + ' ';
//Extract module filename
P:= Pos('"', Str);
if P = 1 then begin
Delete(Str, 1, 1);
P:= Pos('"', Str);
Tmp:= Copy(Str, 1, P-1);
Delete(Str, 1, P);
FModuleFilename:= Tmp;
end else begin
P:= Pos(' ', Str);
Tmp:= Copy(Str, 1, P-1);
Delete(Str, 1, P);
FModuleFilename:= Tmp;
end;
Str:= Trim(Str) + ' ';
//Extract open filename
P:= Pos('"', Str);
if P = 1 then begin
Delete(Str, 1, 1);
P:= Pos('"', Str);
Tmp:= Copy(Str, 1, P-1);
Delete(Str, 1, P);
FOpenFilename:= Tmp;
end else begin
P:= Pos('-', Str);
if P < 1 then
P:= Pos('/', 'Str');
if P < 1 then begin
P:= Pos(' ', Str);
Tmp:= Copy(Str, 1, P-1);
Delete(Str, 1, P);
FOpenFilename:= Tmp;
end;
end;
Str:= Trim(Str) + ' ';
//Extract remaining param switches/values
while Length(Trim(Str)) > 0 do begin
P:= Pos('-', Str);
if P < 1 then
P:= Pos('/', 'Str');
if P > 0 then begin
Delete(Str, 1, 1);
P:= Pos(' ', Str);
Tmp:= Trim(Copy(Str, 1, P-1));
Delete(Str, 1, P);
if Pos('"', Tmp) = 1 then begin
Delete(Tmp, 1, 1);
P:= Pos('"', Tmp);
if P > 0 then
Delete(Tmp, 1, 1);
end;
Cmd:= Tmp;
Str:= Trim(Str) + ' ';
if (Pos('-', Str) <> 1) and (Pos('/', Str) <> 1) then begin
P:= Pos('"', Str);
if P = 1 then begin
Delete(Str, 1, 1);
P:= Pos('"', Str);
Tmp:= Copy(Str, 1, P-1);
Delete(Str, 1, P);
end else begin
P:= Pos(' ', Str);
Tmp:= Copy(Str, 1, P-1);
Delete(Str, 1, P);
end;
Val:= Tmp;
end else begin
Val:= '';
end;
if Val = '' then
Val:= ' ';
FItems.Values[Cmd]:= Val;
end else begin
Str:= '';
raise Exception.Create('Command line parameters malformed ('+Str+')');
end;
Str:= Trim(Str) + ' ';
end;
end;
end.
