RelativeFS with Files64

git-svn-id: https://svn.inf.ethz.ch/svn/lecturers/a2/trunk@7609 8c9fc860-2736-0410-a75d-ab315db34111

source/RelativeFiles64.Mod

@@ -0,0 +1,140 @@
+MODULE RelativeFiles64;	(**  AUTHOR "fof"; PURPOSE "";  **)
+
+IMPORT Files := Files64,UTF8Strings;
+TYPE PathName=ARRAY 272 OF CHAR;
+
+	FileSystem = OBJECT(Files.FileSystem)
+	VAR relTo: PathName; fs: Files.FileSystem;
+
+		PROCEDURE &InitFileSystem*( relTo: ARRAY OF CHAR; fs: Files.FileSystem);
+		VAR ch: CHAR;i: LONGINT;
+		BEGIN
+			SELF.fs := fs;
+			INCL(flags,Files.NeedsPrefix);
+			i :=0; ch := 0X;
+			WHILE(relTo[i] # 0X) DO
+				ch := relTo[i];
+				INC(i);
+			END;
+			IF (ch = "/") & (i>1)  THEN relTo[i-1] := 0X END; (* remove ending "/" *)
+
+			IF fs.prefix # "" THEN
+				RemovePrefix(relTo);
+			END;
+
+			COPY(relTo,SELF.relTo);
+		END InitFileSystem;
+
+		PROCEDURE MakeRel(VAR name,new: ARRAY OF CHAR);
+		BEGIN
+			COPY(relTo,new);
+			RemovePrefix(name);
+			IF name[0] # "/" THEN  UTF8Strings.Append("/",new); END;
+			UTF8Strings.Append(name,new);
+		END MakeRel;
+
+		PROCEDURE New0 (name: ARRAY OF CHAR): Files.File;
+		VAR new: PathName;
+		BEGIN
+			MakeRel(name,new); RETURN fs.New0(new);
+		END New0;
+
+		PROCEDURE Old0 (name: ARRAY OF CHAR): Files.File;
+		VAR new: PathName;
+		BEGIN
+			(* Out.String("Old0, called with:"); Out.String(name); Out.Ln; *)
+			MakeRel(name,new);
+			(* Out.String("Old0, calling with:"); Out.String(new); Out.Ln; *)
+			RETURN fs.Old0(new);
+		END Old0;
+
+		PROCEDURE CreateDirectory0 (name: ARRAY OF CHAR;     VAR res: LONGINT);
+		VAR new: PathName;
+		BEGIN
+			MakeRel(name,new); fs.CreateDirectory0(new,res);
+		END CreateDirectory0;
+
+		PROCEDURE Delete0 (name: ARRAY OF CHAR;     VAR key, res: LONGINT);
+		VAR new: PathName;
+		BEGIN
+			MakeRel(name,new); fs.Delete0(new,key,res);
+		END Delete0;
+
+		PROCEDURE Enumerate0 (mask: ARRAY OF CHAR;     flags: SET;     enum: Files.Enumerator);
+		VAR new: PathName;
+		BEGIN
+			MakeRel(mask,new); 
+			fs.Enumerate0(new,flags,enum);
+		END Enumerate0;
+
+		PROCEDURE FileKey (name: ARRAY OF CHAR): LONGINT;
+		VAR new: PathName;
+		BEGIN
+			(*Out.String("FileKey, called with:"); Out.String(name); Out.Ln; *)
+			MakeRel(name,new);
+			(*Out.String("FileKey, calling with:"); Out.String(new); Out.Ln;*)
+			RETURN fs.FileKey(new);
+		END FileKey;
+
+		PROCEDURE RemoveDirectory0 (name: ARRAY OF CHAR;     force: BOOLEAN;     VAR key, res: LONGINT);
+		VAR new: PathName;
+		BEGIN
+			MakeRel(name,new);  fs.RemoveDirectory0(new,force,key,res);
+		END RemoveDirectory0;
+
+		PROCEDURE Rename0 (old, new: ARRAY OF CHAR;     f: Files.File;      VAR res: LONGINT);
+		VAR old1,new1: PathName;
+		BEGIN
+			MakeRel(old,old1); MakeRel(new,new1);fs.Rename0(old1,new1,f,res);
+		END Rename0;
+
+	END FileSystem;
+
+	PROCEDURE RemovePrefix(VAR name: ARRAY OF CHAR);
+	VAR i,j: LONGINT;
+	BEGIN
+		WHILE(name[i] # 0X) & (name[i] # ":") DO
+			INC(i);
+		END;
+		IF name[i] = ":" THEN
+			j := 0; INC(i);
+			WHILE(name[i] # 0X) DO
+				name[j] := name[i]; INC(i);INC(j);
+			END;
+			name[j] := 0X;
+		END;
+	END RemovePrefix;
+
+	(** NewFS - Create a new filesystem relative to a Windows path. does not protect paths higher than relTo! (xyz:/../../.. could be used) *)
+	PROCEDURE NewFS*(context : Files.Parameters);
+	VAR str,prefix,name: ARRAY 256 OF CHAR; fs: FileSystem; rel: Files.FileSystem; ft: Files.FileSystemTable;
+	BEGIN
+		IF context.arg.GetString(str) THEN
+			Files.SplitName(str,prefix,name);
+			IF prefix # "" THEN
+				rel := Files.This(prefix);
+			ELSE
+				Files.GetList(ft);
+				rel := ft[0];
+			END;
+			IF rel # NIL THEN
+				NEW(fs,str,rel);
+				Files.Add(fs, context.prefix);
+			ELSE
+				context.out.String("file system could not be found: "); context.out.String(str); context.out.Ln;
+			END;
+		END;
+	END NewFS;
+
+
+END RelativeFiles64.
+
+SystemTools.Free RelativeFiles64 ~
+
+FSTools.Mount Work RelativeFiles64  ./ ~
+FSTools.Unmount Test ~
+
+
+
+
+System.Directory src:/*