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(* Copyright (C) 2015-2025 Free Software Foundation, Inc. *)
(* 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. *)
IMPLEMENTATION MODULE mcPreprocess ;
FROM SYSTEM IMPORT ADDRESS ;
FROM DynamicStrings IMPORT string, InitString, Mark, KillString, EqualArray, InitStringCharStar,
Dup, ConCat, ConCatChar, RIndex, Slice ;
FROM libc IMPORT system, exit, unlink, printf ;
FROM alists IMPORT alist, initList, killList, includeItemIntoList, foreachItemInListDo ;
FROM M2RTS IMPORT InstallTerminationProcedure ;
FROM FIO IMPORT StdErr, StdOut ;
FROM mcPrintf IMPORT fprintf1 ;
FROM mcOptions IMPORT getVerbose, getCppCommandLine ;
VAR
listOfFiles: alist ;
(*
makeTempFile -
*)
PROCEDURE makeTempFile (ext: String) : String ;
BEGIN
RETURN ConCat (InitString ('/tmp/mctemp.'), ext)
END makeTempFile ;
(*
onExitDelete -
*)
PROCEDURE onExitDelete (filename: String) : String ;
BEGIN
includeItemIntoList (listOfFiles, Dup (filename)) ;
RETURN filename
END onExitDelete ;
(*
removeFile - removes a single file, s.
*)
PROCEDURE removeFile (a: ADDRESS) ;
VAR
s: String ;
BEGIN
s := a ;
IF unlink (string (s))#0
THEN
END
END removeFile ;
(*
removeFiles -
*)
PROCEDURE removeFiles ;
BEGIN
foreachItemInListDo (listOfFiles, removeFile)
END removeFiles ;
(*
preprocessModule - preprocess a file, filename, returning the new filename
of the preprocessed file.
Preprocessing will only occur if requested by the user.
If no preprocessing was requested then filename is returned.
If preprocessing occurs then a temporary file is created
and its name is returned.
All temporary files will be deleted when the compiler exits.
*)
PROCEDURE preprocessModule (filename: String) : String ;
VAR
tempfile,
command,
commandLine: String ;
pos : CARDINAL ;
BEGIN
command := getCppCommandLine () ;
IF EqualArray (command, '')
THEN
RETURN filename
ELSE
tempfile := InitStringCharStar (makeTempFile (InitString ('cpp'))) ;
commandLine := Dup (command) ;
commandLine := ConCat (ConCat (ConCat (ConCatChar (Dup (commandLine), ' '), filename),
Mark (InitString(' -o '))),
tempfile) ;
IF getVerbose ()
THEN
fprintf1 (StdOut, "%s\n", commandLine)
END ;
IF system (string (commandLine))#0
THEN
fprintf1(StdErr, 'C preprocessor failed when preprocessing %s\n', filename) ;
exit(1)
END ;
commandLine := KillString (commandLine) ;
RETURN onExitDelete (tempfile)
END
END preprocessModule ;
BEGIN
listOfFiles := initList () ;
IF NOT InstallTerminationProcedure (removeFiles)
THEN
HALT
END
END mcPreprocess.
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