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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 mcFileName ;
FROM ASCII IMPORT nul ;
FROM DynamicStrings IMPORT InitString, Mark, Slice, Dup, ConCatChar, ConCat, Length, Equal, Index ;
CONST
MaxFileName = 0 ; (* zero means no limits *)
MaxStemName = 0 ;
Directory = '/' ;
(*
currently there are no limits on filename length, this may
be incorrect on some systems.
*)
(*
calculateFileName - calculates and returns a new string filename given a module
and an extension. String, Extension, is concatenated onto
Module and thus it is safe to `Mark' the extension for garbage
collection.
*)
PROCEDURE calculateFileName (module, extension: String) : String ;
BEGIN
IF MaxFileName=0
THEN
RETURN ConCat (ConCatChar (Slice (module, 0, MaxFileName), '.'), extension)
ELSE
RETURN ConCat (ConCatChar (Slice (module, 0, MaxFileName-Length (extension)-1), '.'), extension)
END
END calculateFileName ;
(*
calculateStemName - calculates the stem name for given a module.
This name length will be operating system and
compiler specific.
*)
PROCEDURE calculateStemName (module: String) : String ;
BEGIN
RETURN Slice (module, 0, MaxStemName)
END calculateStemName ;
(*
extractExtension - given a, filename, return the filename without
the extension, Ext.
*)
PROCEDURE extractExtension (filename, ext: String) : String ;
BEGIN
IF Equal (ext, Mark (Slice (filename, -Length (ext), 0)))
THEN
RETURN Slice (filename, 0, -Length (ext))
ELSE
RETURN filename
END
END extractExtension ;
(*
extractModule - given a, filename, return the module name including any
extension. A new string is returned.
*)
PROCEDURE extractModule (filename: String) : String ;
VAR
i: INTEGER ;
BEGIN
i := Index (filename, Directory, 0) ;
IF i=-1
THEN
RETURN Dup (filename)
ELSE
RETURN Slice (filename, i+1, 0)
END
END extractModule ;
END mcFileName.
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