gm2-libs-iso/WholeIO (The GNU Modula-2 Compiler)

#### 4.4.76 gm2-libs-iso/WholeIO ¶

    DEFINITION MODULE WholeIO;

      (* Input and output of whole numbers in decimal text form
         over specified channels.  The read result is of the
         type IOConsts.ReadResults.
      *)

    IMPORT IOChan;

      (* The text form of a signed whole number is
           ["+" | "-"], decimal digit, {decimal digit}

         The text form of an unsigned whole number is
           decimal digit, {decimal digit}
      *)

    PROCEDURE ReadInt (cid: IOChan.ChanId; VAR int: INTEGER);
      (* Skips leading spaces, and removes any remaining characters
         from cid that form part of a signed whole number.  The
         value of this number is assigned to int.  The read result
         is set to the value allRight, outOfRange, wrongFormat,
         endOfLine, or endOfInput.
      *)

    PROCEDURE WriteInt (cid: IOChan.ChanId; int: INTEGER;
                        width: CARDINAL);
      (* Writes the value of int to cid in text form, in a field of
         the given minimum width. *)

    PROCEDURE ReadCard (cid: IOChan.ChanId; VAR card: CARDINAL);
      (* Skips leading spaces, and removes any remaining characters
         from cid that form part of an unsigned whole number.  The
         value of this number is assigned to card. The read result
         is set to the value allRight, outOfRange, wrongFormat,
         endOfLine, or endOfInput.
      *)

    PROCEDURE WriteCard (cid: IOChan.ChanId; card: CARDINAL;
                         width: CARDINAL);
      (* Writes the value of card to cid in text form, in a field
         of the given minimum width. *)

    END WholeIO.