gcc/m2/mc/mcFileName.mod

   1 (* Copyright (C) 2015-2022 Free Software Foundation, Inc.  *)
   2 (* This file is part of GNU Modula-2.
   3
   4 GNU Modula-2 is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 3, or (at your option) any later
   7 version.
   8
   9 GNU Modula-2 is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License along
  15 with gm2; see the file COPYING.  If not, write to the Free Software
  16 Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  *)
  17
  18 IMPLEMENTATION MODULE mcFileName ;
  19
  20
  21 FROM ASCII IMPORT nul ;
  22 FROM DynamicStrings IMPORT InitString, Mark, Slice, Dup, ConCatChar, ConCat, Length, Equal, Index ;
  23
  24
  25 CONST
  26    MaxFileName = 0 ;   (* zero means no limits *)
  27    MaxStemName = 0 ;
  28    Directory   = '/' ;
  29
  30
  31 (*
  32    currently there are no limits on filename length, this may
  33    be incorrect on some systems.
  34 *)
  35
  36
  37 (*
  38    calculateFileName - calculates and returns a new string filename given a module
  39                        and an extension. String, Extension, is concatenated onto
  40                        Module and thus it is safe to `Mark' the extension for garbage
  41                        collection.
  42 *)
  43
  44 PROCEDURE calculateFileName (module, extension: String) : String ;
  45 BEGIN
  46    IF MaxFileName=0
  47    THEN
  48       RETURN ConCat (ConCatChar (Slice (module, 0, MaxFileName), '.'), extension)
  49    ELSE
  50       RETURN ConCat (ConCatChar (Slice (module, 0, MaxFileName-Length (extension)-1), '.'), extension)
  51    END
  52 END calculateFileName ;
  53
  54
  55 (*
  56    calculateStemName - calculates the stem name for given a module.
  57                        This name length will be operating system and
  58                        compiler specific.
  59 *)
  60
  61 PROCEDURE calculateStemName (module: String) : String ;
  62 BEGIN
  63    RETURN Slice (module, 0, MaxStemName)
  64 END calculateStemName ;
  65
  66
  67 (*
  68    extractExtension - given a, filename, return the filename without
  69                       the extension, Ext.
  70 *)
  71
  72 PROCEDURE extractExtension (filename, ext: String) : String ;
  73 BEGIN
  74    IF Equal (ext, Mark (Slice (filename, -Length (ext), 0)))
  75    THEN
  76       RETURN Slice (filename, 0, -Length (ext))
  77    ELSE
  78       RETURN filename
  79    END
  80 END extractExtension ;
  81
  82
  83 (*
  84    extractModule - given a, filename, return the module name including any
  85                    extension. A new string is returned.
  86 *)
  87
  88 PROCEDURE extractModule (filename: String) : String ;
  89 VAR
  90    i: INTEGER ;
  91 BEGIN
  92    i := Index (filename, Directory, 0) ;
  93    IF i=-1
  94    THEN
  95       RETURN Dup (filename)
  96    ELSE
  97       RETURN Slice (filename, i+1, 0)
  98    END
  99 END extractModule ;
 100
 101
 102 END mcFileName.