(* mcSearch.def mcSearch provides a mechanism to search selected directories.

Copyright (C) 2015-2025 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/>.  *)

DEFINITION MODULE mcSearch ;


(* mcSearch provides a mechanism to search selected directories
   in an attempt to locate and open a given source file.  *)

FROM DynamicStrings IMPORT String ;


(*
   initSearchPath - initialise the compiler search, path.
                    The string path may take the form:

                    Path           ::= IndividualPath { ":" IndividualPath }
                    IndividualPath ::= "." | DirectoryPath
                    DirectoryPath  ::= [ "/" ] Name { "/" Name }
                    Name           ::= Letter { (Letter | Number) }
                    Letter         ::= A..Z | a..z
                    Number         ::= 0..9
*)

PROCEDURE initSearchPath (path: String) ;


(*
   prependSearchPath - prepends a new path to the initial search path.
*)

PROCEDURE prependSearchPath (path: String) ;


(*
   findSourceFile - attempts to locate the source file FileName.
                    If a file is found then TRUE is returned otherwise
                    FALSE is returned.
                    The parameter FullPath is set indicating the
                    absolute location of source FileName.
                    FullPath will be totally overwritten and should
                    not be initialized by InitString before this function
                    is called.
                    FindSourceFile sets FullPath to a new string if successful.
*)

PROCEDURE findSourceFile (FileName: String;
                          VAR fullPath: String) : BOOLEAN ;


(*
   findSourceDefFile - attempts to find the definition module for
                       a module, Stem. If successful it returns
                       the full path and returns TRUE. If unsuccessful
                       then FALSE is returned and FullPath is set to NIL.
*)

PROCEDURE findSourceDefFile (stem: String; VAR fullPath: String) : BOOLEAN ;


(*
   findSourceModFile - attempts to find the implementation module for
                       a module, Stem. If successful it returns
                       the full path and returns TRUE. If unsuccessful
                       then FALSE is returned and FullPath is set to NIL.
*)

PROCEDURE findSourceModFile (stem: String; VAR fullPath: String) : BOOLEAN ;


(*
   setDefExtension - sets the default extension for definition modules to, ext.
                     The string, ext, should be deallocated by the caller at
                     an appropriate time.
*)

PROCEDURE setDefExtension (ext: String) ;


(*
   setModExtension - sets the default extension for implementation and program
                     modules to, ext. The string, ext, should be deallocated
                     by the caller at an appropriate time.
*)

PROCEDURE setModExtension (ext: String) ;


END mcSearch.