This file is indexed.

/usr/share/ada/adainclude/anet/anet-util.adb is in libanet0.3.1-dev 0.3.1-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
--
--  Copyright (C) 2011, 2012 secunet Security Networks AG
--  Copyright (C) 2011-2014  Reto Buerki <reet@codelabs.ch>
--  Copyright (C) 2011-2014  Adrian-Ken Rueegsegger <ken@codelabs.ch>
--
--  This program 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 2 of the License, or (at your
--  option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
--
--  This program 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.
--
--  As a special exception, if other files instantiate generics from this
--  unit,  or  you  link  this  unit  with  other  files  to  produce  an
--  executable   this  unit  does  not  by  itself  cause  the  resulting
--  executable to  be  covered by the  GNU General  Public License.  This
--  exception does  not  however  invalidate  any  other reasons why  the
--  executable file might be covered by the GNU Public License.
--

with Ada.Directories;
with Ada.Numerics.Discrete_Random;

with Interfaces;

with Anet.Thin;

package body Anet.Util is

   use Ada.Streams;

   Chars : constant String := "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
     & "abcdefghijklmnopqrstuvwxyz" & "0123456789";
   subtype Chars_Range is Positive range Chars'First .. Chars'Last;

   package Random_Chars is new Ada.Numerics.Discrete_Random
     (Result_Subtype => Chars_Range);
   Generator : Random_Chars.Generator;

   -------------------------------------------------------------------------

   function Calculate_One_Complement
     (Data : Ada.Streams.Stream_Element_Array)
      return Double_Byte
   is
      function Make_Even
        (Data : Stream_Element_Array)
         return Stream_Element_Array;
      --  Pad data array with a nil element if it has an uneven number of
      --  elements.

      function Make_Even
        (Data : Stream_Element_Array)
         return Stream_Element_Array
      is
      begin
         if Data'Length mod 2 = 0 then
            return Data;
         end if;

         return D : Stream_Element_Array (Data'First .. Data'Last + 1) do
            D (Data'Range) := Data;
            D (D'Last)     := 0;
         end return;
      end Make_Even;

      use Interfaces;

      Sum  : Unsigned_32                   := 0;
      Even : constant Stream_Element_Array := Make_Even (Data => Data);
      Idx  : Stream_Element_Offset         := Even'First;
   begin
      loop
         Sum := Sum + Unsigned_32 (Shift_Left
           (Value  => Unsigned_16 (Even (Idx)),
            Amount => 8));
         Sum := Sum + Unsigned_32 (Even (Idx + 1));

         Idx := Idx + 2;
         exit when Idx > Even'Last;
      end loop;

      loop
         declare
            Carries : constant Unsigned_32
              := Shift_Right (Value  => Sum,
                              Amount => 16);
         begin
            exit when Carries < 1;

            Sum := (Sum and 16#ffff#) + Carries;
         end;
      end loop;

      Sum := (not Sum) mod 2 ** 16;

      return Double_Byte (Sum);
   end Calculate_One_Complement;

   -------------------------------------------------------------------------

   function Random_String (Len : Positive) return String
   is
      Result : String (1 .. Len);
   begin
      for I in Result'Range loop
         Result (I) := Chars (Random_Chars.Random (Gen => Generator));
      end loop;

      return Result;
   end Random_String;

   -------------------------------------------------------------------------

   procedure Wait_For_File
     (Path     : String;
      Timespan : Duration)
   is
   begin
      for L in 1 .. Positive (100 * Timespan) loop
         if Ada.Directories.Exists (Name => Path) then
            return;
         end if;
         delay Timespan / 100;
      end loop;

      raise Wait_Timeout with "File '" & Path & "' not available after"
        & Timespan'Img & " second(s)";
   end Wait_For_File;

   -------------------------------------------------------------------------

begin
   Random_Chars.Reset (Gen       => Generator,
                       Initiator => Integer (Thin.C_Getpid));
end Anet.Util;