Category : Modula II Source Code
Archive   : M2TUTOR.ZIP
Filename : LIST.MOD

 
Output of file : LIST.MOD contained in archive : M2TUTOR.ZIP
MODULE List; (* Program to list Modula-2 source files with page *)
(* numbers and line numbers. *)

FROM FileSystem IMPORT Lookup, Close, File, ReadChar, Response,
WriteChar;
FROM Conversions IMPORT ConvertCardinal;
FROM TimeDate IMPORT GetTime, Time;
IMPORT ASCII;
IMPORT InOut;

TYPE BigString = ARRAY[1..80] OF CHAR;
SmallString = ARRAY[1..25] OF CHAR;

VAR InFile : File; (* The Input File record *)
Printer : File; (* The Printer File record *)
NameOfFile : SmallString; (* Storage for the filename *)
InputLine : BigString; (* The Input line of characters *)
LineNumber : CARDINAL; (* The current line number *)
LinesOnPage : CARDINAL; (* Number of Lines on this page *)
PageNumber : CARDINAL; (* Page Number *)
Index : CARDINAL; (* Used locally in several proc's *)
Year,Day,Month : CARDINAL;
Hour,Minute,Second : CARDINAL;
GoodFile : BOOLEAN;

(* ************************************************ WriteCharString *)
(* Since there is no WriteString procedure in the FileSystem *)
(* module, this procedure does what it would do. It outputs a *)
(* string until it comes to the end of it or until it comes to a *)
(* character 0. *)
PROCEDURE WriteCharString(CharString : ARRAY OF CHAR);
BEGIN
Index := 0;
LOOP
IF Index > HIGH(CharString) THEN EXIT END; (* Max = 80 chars *)
IF CharString[Index] = 0C THEN EXIT END; (* If a 0C is found*)
WriteChar(Printer,CharString[Index]);
INC(Index);
END;
END WriteCharString;


(* ************************************************* WriteLnPrinter *)
(* Since there is no WriteLn procedure in the FileSystem module, *)
(* procedure does its job. *)
PROCEDURE WriteLnPrinter;
CONST CRLF = 12C;
BEGIN
WriteChar(Printer,CRLF);
END WriteLnPrinter;


(* ************************************************* GetFileAndOpen *)
(* This procedure requests the filename, receives it, and opens the *)
(* source file for reading and printing. It loops until a valid *)
(* filename is found. *)
PROCEDURE GetFileAndOpen(VAR GoodFile : BOOLEAN);
BEGIN
InOut.WriteLn;
InOut.WriteString("Name of file to print ---> ");
InOut.ReadString(NameOfFile);
Lookup(InFile,NameOfFile,FALSE);
IF InFile.res = done THEN
GoodFile := TRUE;
Lookup(Printer,"PRN",TRUE); (* open printer as a file *)
ELSE
GoodFile := FALSE;
InOut.WriteString(" File doesn't exist");
InOut.WriteLn;
END;
END GetFileAndOpen;


(* ***************************************************** Initialize *)
(* This procedure initializes some of the counters. *)
PROCEDURE Initialize;
VAR PackedTime : Time;
BEGIN
LineNumber := 1;
LinesOnPage := 0;
PageNumber := 1;
GetTime(PackedTime);
Day := PackedTime.day MOD 32;
Month := PackedTime.day DIV 32;
Month := Month MOD 16;
Year := 1900 + PackedTime.day DIV 512;
Hour := PackedTime.minute DIV 60;
Minute := PackedTime.minute MOD 60;
Second := PackedTime.millisec DIV 1000;
END Initialize;


(* *********************************************** PrintTimeAndDate *)
(* This procedure prints the time and date at the top of every page *)
PROCEDURE PrintTimeAndDate;
VAR OutChars : ARRAY[0..4] OF CHAR;
BEGIN
WriteCharString(" ");
ConvertCardinal(Hour,2,OutChars);
WriteCharString(OutChars);
WriteCharString(":");
ConvertCardinal(Minute,2,OutChars);
WriteCharString(OutChars);
WriteCharString(":");
ConvertCardinal(Second,2,OutChars);
WriteCharString(OutChars);
WriteCharString(" ");
ConvertCardinal(Month,2,OutChars);
WriteCharString(OutChars);
WriteCharString("/");
ConvertCardinal(Day,2,OutChars);
WriteCharString(OutChars);
WriteCharString("/");
ConvertCardinal(Year,4,OutChars);
WriteCharString(OutChars);
END PrintTimeAndDate;


(* *************************************************** OutputHeader *)
(* This procedure prints the filename at the top of each page along *)
(* with the page number. *)
PROCEDURE OutputHeader;
VAR PageOut : ARRAY[1..4] OF CHAR;
BEGIN
WriteCharString(" Filename --> ");
WriteCharString(NameOfFile);
WriteCharString(" ");
PrintTimeAndDate;
WriteCharString(" Page");
ConvertCardinal(PageNumber,4,PageOut);
WriteCharString(PageOut);
WriteLnPrinter;
WriteLnPrinter;
INC(PageNumber);
END OutputHeader;


(* *************************************************** OutputFooter *)
(* This procedure outputs 8 blank lines at the bottom of each page. *)
(* Note; The user may wish to change this to a formfeed character. *)
PROCEDURE OutputFooter;
BEGIN
FOR Index := 1 TO 8 DO
WriteLnPrinter;
END;
END OutputFooter;


(* ******************************************************* GetALine *)
(* This procedure inputs a line from the source file. It quits when*)
(* it finds an end-of-line, an end-of-file, or after it gets 80 *)
(* characters. *)
PROCEDURE GetALine;
VAR LocalChar : CHAR;
BEGIN
FOR Index := 1 TO 80 DO (* clear the input area so that the *)
InputLine[Index] := 0C; (* search for 0C will work. *)
END;

Index := 1;
LOOP
ReadChar(InFile,LocalChar);
IF InFile.eof THEN EXIT END;
InputLine[Index] := LocalChar;
IF LocalChar = ASCII.EOL THEN EXIT END;
INC(Index);
IF Index = 81 THEN EXIT END;
END;
END GetALine;


(* ***************************************************** OutputLine *)
(* Output a line of test with the line number in front of it, after *)
(* checking to see if the page is full. *)
PROCEDURE OutputLine;
VAR Count : CARDINAL;
CardOutArea : ARRAY[1..8] OF CHAR;
BEGIN
INC(LinesOnPage);
IF LinesOnPage > 56 THEN
OutputFooter;
OutputHeader;
LinesOnPage := 1;
END;
ConvertCardinal(LineNumber,6,CardOutArea);
INC(LineNumber);
WriteCharString(CardOutArea);
WriteCharString(" ");
WriteCharString(InputLine);
END OutputLine;


(* *************************************************** SpacePaperUp *)
(* At the end of the listing, space the paper up so that a new page *)
(* is ready for the next listing. *)
PROCEDURE SpacePaperUp;
VAR Count : CARDINAL;
BEGIN
Count := 64 - LinesOnPage;
FOR Index := 1 TO Count DO
WriteLnPrinter;
END;
Close(InFile);
Close(Printer);
END SpacePaperUp;


(* *************************************************** Main Program *)
(* This is nothing more than a big loop. It needs no comment. *)
BEGIN
GetFileAndOpen(GoodFile);
IF GoodFile THEN
Initialize;
OutputHeader;
REPEAT
GetALine;
IF NOT InFile.eof THEN
OutputLine;
END;
UNTIL InFile.eof;
SpacePaperUp;
END;
END List.


  3 Responses to “Category : Modula II Source Code
Archive   : M2TUTOR.ZIP
Filename : LIST.MOD

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

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