gcc/ada/a-dirval.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --             A D A . D I R E C T O R I E S . V A L I D I T Y              --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                             (POSIX Version)                              --
   9 --                                                                          --
  10 --          Copyright (C) 2004 Free Software Foundation, Inc.               --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is the POSIX version of this package
  36
  37 package body Ada.Directories.Validity is
  38
  39    ------------------------
  40    -- Is_Valid_Path_Name --
  41    ------------------------
  42
  43    function Is_Valid_Path_Name   (Name : String) return Boolean is
  44    begin
  45       --  A path name cannot be empty and cannot contain any NUL character
  46
  47       if Name'Length = 0 then
  48          return False;
  49
  50       else
  51          for J in Name'Range loop
  52             if Name (J) = ASCII.NUL then
  53                return False;
  54             end if;
  55          end loop;
  56       end if;
  57
  58       --  If Name does not contain any NUL character, it is valid
  59
  60       return True;
  61    end Is_Valid_Path_Name;
  62
  63    --------------------------
  64    -- Is_Valid_Simple_Name --
  65    --------------------------
  66
  67    function Is_Valid_Simple_Name (Name : String) return Boolean is
  68    begin
  69       --  A file name cannot be empty and cannot contain a slash ('/') or
  70       --  the NUL character.
  71
  72       if Name'Length = 0 then
  73          return False;
  74
  75       else
  76          for J in Name'Range loop
  77             if Name (J) = '/' or else Name (J) = ASCII.NUL then
  78                return False;
  79             end if;
  80          end loop;
  81       end if;
  82
  83       --  If Name does not contain any slash or NUL, it is valid
  84
  85       return True;
  86    end Is_Valid_Simple_Name;
  87
  88 end Ada.Directories.Validity;
  89
  90