gcc/ada/validsw.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              V A L I D S W                               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2001-2016, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 with Opt;    use Opt;
  27 with Output; use Output;
  28
  29 package body Validsw is
  30
  31    ----------------------------------
  32    -- Reset_Validity_Check_Options --
  33    ----------------------------------
  34
  35    procedure Reset_Validity_Check_Options is
  36    begin
  37       Validity_Check_Components     := False;
  38       Validity_Check_Copies         := False;
  39       Validity_Check_Default        := True;
  40       Validity_Check_Floating_Point := False;
  41       Validity_Check_In_Out_Params  := False;
  42       Validity_Check_In_Params      := False;
  43       Validity_Check_Operands       := False;
  44       Validity_Check_Returns        := False;
  45       Validity_Check_Subscripts     := False;
  46       Validity_Check_Tests          := False;
  47    end Reset_Validity_Check_Options;
  48
  49    ---------------------------------
  50    -- Save_Validity_Check_Options --
  51    ---------------------------------
  52
  53    procedure Save_Validity_Check_Options
  54      (Options : out Validity_Check_Options)
  55    is
  56       P : Natural := 0;
  57
  58       procedure Add (C : Character; S : Boolean);
  59       --  Add given character C to string if switch S is true
  60
  61       procedure Add (C : Character; S : Boolean) is
  62       begin
  63          if S then
  64             P := P + 1;
  65             Options (P) := C;
  66          end if;
  67       end Add;
  68
  69    --  Start of processing for Save_Validity_Check_Options
  70
  71    begin
  72       for K in Options'Range loop
  73          Options (K) := ' ';
  74       end loop;
  75
  76       Add ('n', not Validity_Check_Default);
  77
  78       Add ('c', Validity_Check_Copies);
  79       Add ('e', Validity_Check_Components);
  80       Add ('f', Validity_Check_Floating_Point);
  81       Add ('i', Validity_Check_In_Params);
  82       Add ('m', Validity_Check_In_Out_Params);
  83       Add ('o', Validity_Check_Operands);
  84       Add ('r', Validity_Check_Returns);
  85       Add ('s', Validity_Check_Subscripts);
  86       Add ('t', Validity_Check_Tests);
  87    end Save_Validity_Check_Options;
  88
  89    ----------------------------------------
  90    -- Set_Default_Validity_Check_Options --
  91    ----------------------------------------
  92
  93    procedure Set_Default_Validity_Check_Options is
  94    begin
  95       Reset_Validity_Check_Options;
  96       Set_Validity_Check_Options ("d");
  97    end Set_Default_Validity_Check_Options;
  98
  99    --------------------------------
 100    -- Set_Validity_Check_Options --
 101    --------------------------------
 102
 103    --  Version used when no error checking is required
 104
 105    procedure Set_Validity_Check_Options (Options : String) is
 106       OK : Boolean;
 107       EC : Natural;
 108       pragma Warnings (Off, OK);
 109       pragma Warnings (Off, EC);
 110    begin
 111       Set_Validity_Check_Options (Options, OK, EC);
 112    end Set_Validity_Check_Options;
 113
 114    --  Normal version with error checking
 115
 116    procedure Set_Validity_Check_Options
 117      (Options  : String;
 118       OK       : out Boolean;
 119       Err_Col  : out Natural)
 120    is
 121       J : Natural;
 122       C : Character;
 123
 124    begin
 125       J := Options'First;
 126       while J <= Options'Last loop
 127          C := Options (J);
 128          J := J + 1;
 129
 130          --  Turn on validity checking (gets turned off by Vn)
 131
 132          Validity_Checks_On := True;
 133
 134          case C is
 135             when 'c' =>
 136                Validity_Check_Copies         := True;
 137
 138             when 'd' =>
 139                Validity_Check_Default        := True;
 140
 141             when 'e' =>
 142                Validity_Check_Components     := True;
 143
 144             when 'f' =>
 145                Validity_Check_Floating_Point := True;
 146
 147             when 'i' =>
 148                Validity_Check_In_Params      := True;
 149
 150             when 'm' =>
 151                Validity_Check_In_Out_Params  := True;
 152
 153             when 'o' =>
 154                Validity_Check_Operands       := True;
 155
 156             when 'p' =>
 157                Validity_Check_Parameters     := True;
 158
 159             when 'r' =>
 160                Validity_Check_Returns        := True;
 161
 162             when 's' =>
 163                Validity_Check_Subscripts     := True;
 164
 165             when 't' =>
 166                Validity_Check_Tests          := True;
 167
 168             when 'C' =>
 169                Validity_Check_Copies         := False;
 170
 171             when 'D' =>
 172                Validity_Check_Default        := False;
 173
 174             when 'E' =>
 175                Validity_Check_Components     := False;
 176
 177             when 'F' =>
 178                Validity_Check_Floating_Point := False;
 179
 180             when 'I' =>
 181                Validity_Check_In_Params      := False;
 182
 183             when 'M' =>
 184                Validity_Check_In_Out_Params  := False;
 185
 186             when 'O' =>
 187                Validity_Check_Operands       := False;
 188
 189             when 'P' =>
 190                Validity_Check_Parameters     := False;
 191
 192             when 'R' =>
 193                Validity_Check_Returns        := False;
 194
 195             when 'S' =>
 196                Validity_Check_Subscripts     := False;
 197
 198             when 'T' =>
 199                Validity_Check_Tests          := False;
 200
 201             when 'a' =>
 202                Validity_Check_Components     := True;
 203                Validity_Check_Copies         := True;
 204                Validity_Check_Default        := True;
 205                Validity_Check_Floating_Point := True;
 206                Validity_Check_In_Out_Params  := True;
 207                Validity_Check_In_Params      := True;
 208                Validity_Check_Operands       := True;
 209                Validity_Check_Parameters     := True;
 210                Validity_Check_Returns        := True;
 211                Validity_Check_Subscripts     := True;
 212                Validity_Check_Tests          := True;
 213
 214             when 'n' =>
 215                Validity_Check_Components     := False;
 216                Validity_Check_Copies         := False;
 217                Validity_Check_Default        := False;
 218                Validity_Check_Floating_Point := False;
 219                Validity_Check_In_Out_Params  := False;
 220                Validity_Check_In_Params      := False;
 221                Validity_Check_Operands       := False;
 222                Validity_Check_Parameters     := False;
 223                Validity_Check_Returns        := False;
 224                Validity_Check_Subscripts     := False;
 225                Validity_Check_Tests          := False;
 226                Validity_Checks_On            := False;
 227
 228             when ' ' =>
 229                null;
 230
 231             when others =>
 232                if Ignore_Unrecognized_VWY_Switches then
 233                   Write_Line ("unrecognized switch -gnatV" & C & " ignored");
 234                else
 235                   OK      := False;
 236                   Err_Col := J - 1;
 237                   return;
 238                end if;
 239          end case;
 240       end loop;
 241
 242       OK := True;
 243       Err_Col := Options'Last + 1;
 244    end Set_Validity_Check_Options;
 245
 246 end Validsw;