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(* M2Printf.mod provides a simple printf capability.
Copyright (C) 2001-2025 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Modula-2; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. *)
IMPLEMENTATION MODULE M2Printf ;
FROM SFIO IMPORT WriteS ;
FROM FIO IMPORT StdOut ;
FROM DynamicStrings IMPORT String, string, InitString, KillString, InitStringCharStar, Mark ;
FROM StrLib IMPORT StrLen ;
FROM FormatStrings IMPORT Sprintf0, Sprintf1, Sprintf2, Sprintf3, Sprintf4 ;
FROM NameKey IMPORT Name, KeyToCharStar ;
(*
IsDigit - returns TRUE if, ch, is a character 0..9
*)
(*
PROCEDURE IsDigit (ch: CHAR) : BOOLEAN ;
BEGIN
RETURN (ch>='0') AND (ch<='9')
END IsDigit ;
*)
(*
Cast - casts a := b
*)
PROCEDURE Cast (VAR a: ARRAY OF BYTE; b: ARRAY OF BYTE) ;
VAR
i: CARDINAL ;
BEGIN
IF HIGH(a) = HIGH(b)
THEN
FOR i := 0 TO HIGH(a) DO
a[i] := b[i]
END
ELSE
HALT
END
END Cast ;
(*
TranslateNameToCharStar - takes a format specification string, a, and
if it contains %a then this is translated
into a String and %a is replaced by %s.
*)
PROCEDURE TranslateNameToCharStar (VAR a: ARRAY OF CHAR;
n: CARDINAL) : BOOLEAN ;
VAR
argno,
i, h : CARDINAL ;
BEGIN
argno := 1 ;
i := 0 ;
h := StrLen(a) ;
WHILE i<h DO
IF (a[i]='%') AND (i+1<h)
THEN
IF (a[i+1] = 'a') AND (argno = n)
THEN
a[i+1] := 's' ;
RETURN TRUE
END ;
INC (argno) ;
IF argno>n
THEN
(* all done *)
RETURN FALSE
END
END ;
INC (i)
END ;
RETURN FALSE
END TranslateNameToCharStar ;
(*
fprintf0 - writes out an array to, file, after the escape sequences
have been translated.
*)
PROCEDURE fprintf0 (file: File; a: ARRAY OF CHAR) ;
BEGIN
IF KillString (WriteS (file, Sprintf0 (InitString(a)))) = NIL
THEN
END
END fprintf0 ;
PROCEDURE fprintf1 (file: File; a: ARRAY OF CHAR; w: ARRAY OF BYTE) ;
VAR
s, t: String ;
n : Name ;
BEGIN
IF TranslateNameToCharStar (a, 1)
THEN
Cast (n, w) ;
s := Mark (InitStringCharStar (KeyToCharStar (n))) ;
t := Mark (InitString (a)) ;
s := Sprintf1 (t, s)
ELSE
t := Mark (InitString (a)) ;
s := Sprintf1 (t, w)
END ;
IF KillString (WriteS (file, s)) = NIL
THEN
END
END fprintf1 ;
PROCEDURE fprintf2 (file: File; a: ARRAY OF CHAR; w1, w2: ARRAY OF BYTE) ;
VAR
n : Name ;
s,
s1, s2: String ;
b : BITSET ;
BEGIN
b := {} ;
IF TranslateNameToCharStar (a, 1)
THEN
Cast (n, w1) ;
s1 := Mark(InitStringCharStar (KeyToCharStar (n))) ;
INCL (b, 1)
END ;
IF TranslateNameToCharStar (a, 2)
THEN
Cast(n, w2) ;
s2 := Mark(InitStringCharStar (KeyToCharStar (n))) ;
INCL (b, 2)
END ;
CASE b OF
{} : s := Sprintf2 (Mark (InitString(a)), w1, w2) |
{1} : s := Sprintf2 (Mark (InitString(a)), s1, w2) |
{2} : s := Sprintf2 (Mark (InitString(a)), w1, s2) |
{1,2}: s := Sprintf2 (Mark (InitString(a)), s1, s2)
ELSE
HALT
END ;
IF KillString (WriteS (file, s)) = NIL
THEN
END
END fprintf2 ;
PROCEDURE fprintf3 (file: File; a: ARRAY OF CHAR;
w1, w2, w3: ARRAY OF BYTE) ;
VAR
n : Name ;
s, s1, s2, s3: String ;
b : BITSET ;
BEGIN
b := {} ;
IF TranslateNameToCharStar (a, 1)
THEN
Cast (n, w1) ;
s1 := Mark (InitStringCharStar (KeyToCharStar (n))) ;
INCL (b, 1)
END ;
IF TranslateNameToCharStar(a, 2)
THEN
Cast (n, w2) ;
s2 := Mark (InitStringCharStar (KeyToCharStar (n))) ;
INCL (b, 2)
END ;
IF TranslateNameToCharStar(a, 3)
THEN
Cast (n, w3) ;
s3 := Mark (InitStringCharStar (KeyToCharStar (n))) ;
INCL (b, 3)
END ;
CASE b OF
{} : s := Sprintf3 (Mark (InitString (a)), w1, w2, w3) |
{1} : s := Sprintf3 (Mark (InitString (a)), s1, w2, w3) |
{2} : s := Sprintf3 (Mark (InitString (a)), w1, s2, w3) |
{1,2} : s := Sprintf3 (Mark (InitString (a)), s1, s2, w3) |
{3} : s := Sprintf3 (Mark (InitString (a)), w1, w2, s3) |
{1,3} : s := Sprintf3 (Mark (InitString (a)), s1, w2, s3) |
{2,3} : s := Sprintf3 (Mark (InitString (a)), w1, s2, s3) |
{1,2,3}: s := Sprintf3 (Mark (InitString (a)), s1, s2, s3)
ELSE
HALT
END ;
IF KillString (WriteS (file, s)) = NIL
THEN
END
END fprintf3 ;
PROCEDURE fprintf4 (file: File; a: ARRAY OF CHAR;
w1, w2, w3, w4: ARRAY OF BYTE) ;
VAR
n : Name ;
s, s1, s2, s3, s4: String ;
b : BITSET ;
BEGIN
b := {} ;
IF TranslateNameToCharStar (a, 1)
THEN
Cast (n, w1) ;
s1 := Mark (InitStringCharStar (KeyToCharStar (n))) ;
INCL (b, 1)
END ;
IF TranslateNameToCharStar (a, 2)
THEN
Cast (n, w2) ;
s2 := Mark (InitStringCharStar (KeyToCharStar (n))) ;
INCL (b, 2)
END ;
IF TranslateNameToCharStar (a, 3)
THEN
Cast (n, w3) ;
s3 := Mark (InitStringCharStar (KeyToCharStar (n))) ;
INCL (b, 3)
END ;
IF TranslateNameToCharStar (a, 4)
THEN
Cast (n, w4) ;
s4 := Mark (InitStringCharStar (KeyToCharStar (n))) ;
INCL (b, 4)
END ;
CASE b OF
{} : s := Sprintf4 (Mark (InitString (a)), w1, w2, w3, w4) |
{1} : s := Sprintf4 (Mark (InitString (a)), s1, w2, w3, w4) |
{2} : s := Sprintf4 (Mark (InitString (a)), w1, s2, w3, w4) |
{1,2} : s := Sprintf4 (Mark (InitString (a)), s1, s2, w3, w4) |
{3} : s := Sprintf4 (Mark (InitString (a)), w1, w2, s3, w4) |
{1,3} : s := Sprintf4 (Mark (InitString (a)), s1, w2, s3, w4) |
{2,3} : s := Sprintf4 (Mark (InitString (a)), w1, s2, s3, w4) |
{1,2,3} : s := Sprintf4 (Mark (InitString (a)), s1, s2, s3, w4) |
{4} : s := Sprintf4 (Mark (InitString (a)), w1, w2, w3, s4) |
{1,4} : s := Sprintf4 (Mark (InitString (a)), s1, w2, w3, s4) |
{2,4} : s := Sprintf4 (Mark (InitString (a)), w1, s2, w3, s4) |
{1,2,4} : s := Sprintf4 (Mark (InitString (a)), s1, s2, w3, s4) |
{3,4} : s := Sprintf4 (Mark (InitString (a)), w1, w2, s3, s4) |
{1,3,4} : s := Sprintf4 (Mark (InitString (a)), s1, w2, s3, s4) |
{2,3,4} : s := Sprintf4 (Mark (InitString (a)), w1, s2, s3, s4) |
{1,2,3,4}: s := Sprintf4 (Mark (InitString (a)), s1, s2, s3, s4)
ELSE
HALT
END ;
IF KillString (WriteS (file, s)) = NIL
THEN
END
END fprintf4 ;
(*
printf0 - writes out an array to, StdOut, after the escape
sequences have been translated.
*)
PROCEDURE printf0 (a: ARRAY OF CHAR) ;
BEGIN
fprintf0 (StdOut, a)
END printf0 ;
PROCEDURE printf1 (a: ARRAY OF CHAR;
w: ARRAY OF BYTE) ;
BEGIN
fprintf1 (StdOut, a, w)
END printf1 ;
PROCEDURE printf2 (a: ARRAY OF CHAR;
w1, w2: ARRAY OF BYTE) ;
BEGIN
fprintf2 (StdOut, a, w1, w2)
END printf2 ;
PROCEDURE printf3 (a: ARRAY OF CHAR;
w1, w2, w3: ARRAY OF BYTE) ;
BEGIN
fprintf3 (StdOut, a, w1, w2, w3)
END printf3 ;
PROCEDURE printf4 (a: ARRAY OF CHAR;
w1, w2, w3, w4: ARRAY OF BYTE) ;
BEGIN
fprintf4 (StdOut, a, w1, w2, w3, w4)
END printf4 ;
END M2Printf.
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