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(* FpuIO.mod implements a fixed format input/output for REAL/LONGREAL.
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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. *)
IMPLEMENTATION MODULE FpuIO ;
FROM StrIO IMPORT ReadString, WriteString, WriteLn ;
FROM StrLib IMPORT StrLen, StrRemoveWhitePrefix ;
FROM ASCII IMPORT nul ;
FROM DynamicStrings IMPORT String, InitString, KillString, CopyOut,
InitStringDB, InitStringCharStarDB,
InitStringCharDB, MultDB, DupDB, SliceDB ;
FROM StringConvert IMPORT StringToLongreal, LongrealToString,
LongIntegerToString, StringToLongInteger ;
(*
#undef GM2_DEBUG_FPUIO
if defined(GM2_DEBUG_FPUIO)
# define InitString(X) InitStringDB(X, __FILE__, __LINE__)
# define InitStringCharStar(X) InitStringCharStarDB(X, __FILE__, __LINE__)
# define InitStringChar(X) InitStringCharDB(X, __FILE__, __LINE__)
# define Mult(X,Y) MultDB(X, Y, __FILE__, __LINE__)
# define Dup(X) DupDB(X, __FILE__, __LINE__)
# define Slice(X,Y,Z) SliceDB(X, Y, Z, __FILE__, __LINE__)
#endif
*)
CONST
MaxLineLength = 100 ;
PROCEDURE ReadReal (VAR x: REAL) ;
VAR
a: ARRAY [0..MaxLineLength] OF CHAR ;
BEGIN
ReadString(a) ;
StrToReal(a, x)
END ReadReal ;
(*
WriteReal - converts a REAL number, x, which has a, TotalWidth, and
FractionWidth into, string, a.
*)
PROCEDURE WriteReal (x: REAL; TotalWidth, FractionWidth: CARDINAL) ;
VAR
a: ARRAY [0..MaxLineLength] OF CHAR ;
BEGIN
RealToStr(x, TotalWidth, FractionWidth, a) ;
WriteString(a)
END WriteReal ;
PROCEDURE StrToReal (a: ARRAY OF CHAR ; VAR x: REAL) ;
VAR
lr: LONGREAL ;
BEGIN
StrToLongReal(a, lr) ; (* let StrToLongReal do the work and we convert the result back to REAL *)
x := VAL(REAL, lr)
END StrToReal ;
PROCEDURE ReadLongReal (VAR x: LONGREAL) ;
VAR
a: ARRAY [0..MaxLineLength] OF CHAR ;
BEGIN
ReadString(a) ;
StrToLongReal(a, x)
END ReadLongReal ;
(*
WriteLongReal - converts a LONGREAL number, x, which has a, TotalWidth, and
FractionWidth into a string.
*)
PROCEDURE WriteLongReal (x: LONGREAL; TotalWidth, FractionWidth: CARDINAL) ;
VAR
a: ARRAY [0..MaxLineLength] OF CHAR ;
BEGIN
LongRealToStr(x, TotalWidth, FractionWidth, a) ;
WriteString(a)
END WriteLongReal ;
PROCEDURE StrToLongReal (a: ARRAY OF CHAR ; VAR x: LONGREAL) ;
VAR
found: BOOLEAN ;
s : String ;
BEGIN
s := InitString(a) ;
x := StringToLongreal(s, found) ;
s := KillString(s)
END StrToLongReal ;
(*
RealToStr - converts a LONGREAL number, Real, which has, TotalWidth, and
FractionWidth into a string.
*)
PROCEDURE RealToStr (x: REAL; TotalWidth, FractionWidth: CARDINAL; VAR a: ARRAY OF CHAR) ;
VAR
lr: LONGREAL ;
BEGIN
lr := VAL(LONGREAL, x) ;
LongRealToStr(lr, TotalWidth, FractionWidth, a)
END RealToStr ;
(*
LongRealToStr - converts a LONGREAL number, Real, which has, TotalWidth, and
FractionWidth into a string.
*)
PROCEDURE LongRealToStr (x: LONGREAL; TotalWidth, FractionWidth: CARDINAL; VAR a: ARRAY OF CHAR) ;
VAR
s: String ;
BEGIN
s := LongrealToString(x, TotalWidth, FractionWidth) ;
CopyOut(a, s) ;
s := KillString(s)
END LongRealToStr ;
PROCEDURE ReadLongInt (VAR x: LONGINT) ;
VAR
a : ARRAY [0..MaxLineLength] OF CHAR ;
BEGIN
ReadString( a ) ;
StrToLongInt(a, x)
END ReadLongInt ;
PROCEDURE WriteLongInt (x: LONGINT; n: CARDINAL) ;
VAR
a : ARRAY [0..MaxLineLength] OF CHAR ;
BEGIN
LongIntToStr(x, n, a) ;
WriteString(a)
END WriteLongInt ;
PROCEDURE LongIntToStr (x: LONGINT; n: CARDINAL ; VAR a: ARRAY OF CHAR) ;
VAR
s: String ;
BEGIN
s := LongIntegerToString(x, n, ' ', FALSE, 10, TRUE) ;
CopyOut(a, s) ;
s := KillString(s)
END LongIntToStr ;
PROCEDURE StrToLongInt (a: ARRAY OF CHAR ; VAR x: LONGINT) ;
VAR
s : String ;
found: BOOLEAN ;
BEGIN
s := InitString(a) ;
x := StringToLongInteger(s, 10, found) ;
s := KillString(s)
END StrToLongInt ;
END FpuIO.
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