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(* Library module defined by the International Standard
Information technology - programming languages
BS ISO/IEC 10514-1:1996E Part 1: Modula-2, Base Language.
Copyright ISO/IEC (International Organization for Standardization
and International Electrotechnical Commission) 1996-2021.
It may be freely copied for the purpose of implementation (see page
707 of the Information technology - Programming languages Part 1:
Modula-2, Base Language. BS ISO/IEC 10514-1:1996). *)
DEFINITION MODULE SWholeIO;
(* Input and output of whole numbers in decimal text form over
default channels. The read result is of the type
IOConsts.ReadResults.
*)
(* 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 (VAR int: INTEGER);
(* Skips leading spaces, and removes any remaining characters
from the default input channel 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 (int: INTEGER; width: CARDINAL);
(* Writes the value of int to the default output channel in
text form, in a field of the given minimum width.
*)
PROCEDURE ReadCard (VAR card: CARDINAL);
(* Skips leading spaces, and removes any remaining characters
from the default input channel 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 (card: CARDINAL; width: CARDINAL);
(* Writes the value of card to the default output channel in
text form, in a field of the given minimum width.
*)
END SWholeIO.
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