gcc/ada/stylesw.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              S T Y L E S W                               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2006, 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 2,  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 COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 with Hostparm; use Hostparm;
  28 with Opt;      use Opt;
  29
  30 package body Stylesw is
  31
  32    -------------------------------
  33    -- Reset_Style_Check_Options --
  34    -------------------------------
  35
  36    procedure Reset_Style_Check_Options is
  37    begin
  38       Style_Check_Indentation         := 0;
  39       Style_Check_Attribute_Casing    := False;
  40       Style_Check_Blanks_At_End       := False;
  41       Style_Check_Blank_Lines         := False;
  42       Style_Check_Comments            := False;
  43       Style_Check_DOS_Line_Terminator := False;
  44       Style_Check_End_Labels          := False;
  45       Style_Check_Form_Feeds          := False;
  46       Style_Check_Horizontal_Tabs     := False;
  47       Style_Check_If_Then_Layout      := False;
  48       Style_Check_Keyword_Casing      := False;
  49       Style_Check_Layout              := False;
  50       Style_Check_Max_Line_Length     := False;
  51       Style_Check_Max_Nesting_Level   := False;
  52       Style_Check_Mode_In             := False;
  53       Style_Check_Order_Subprograms   := False;
  54       Style_Check_Pragma_Casing       := False;
  55       Style_Check_References          := False;
  56       Style_Check_Specs               := False;
  57       Style_Check_Standard            := False;
  58       Style_Check_Tokens              := False;
  59       Style_Check_Xtra_Parens         := False;
  60    end Reset_Style_Check_Options;
  61
  62    ------------------------------
  63    -- Save_Style_Check_Options --
  64    ------------------------------
  65
  66    procedure Save_Style_Check_Options (Options : out Style_Check_Options) is
  67       P : Natural := 0;
  68
  69       procedure Add (C : Character; S : Boolean);
  70       --  Add given character C to string if switch S is true
  71
  72       procedure Add_Nat (N : Nat);
  73       --  Add given natural number to string
  74
  75       ---------
  76       -- Add --
  77       ---------
  78
  79       procedure Add (C : Character; S : Boolean) is
  80       begin
  81          if S then
  82             P := P + 1;
  83             Options (P) := C;
  84          end if;
  85       end Add;
  86
  87       -------------
  88       -- Add_Nat --
  89       -------------
  90
  91       procedure Add_Nat (N : Nat) is
  92       begin
  93          if N > 9 then
  94             Add_Nat (N / 10);
  95          end if;
  96
  97          P := P + 1;
  98          Options (P) := Character'Val (Character'Pos ('0') + N mod 10);
  99       end Add_Nat;
 100
 101    --  Start of processing for Save_Style_Check_Options
 102
 103    begin
 104       for K in Options'Range loop
 105          Options (K) := ' ';
 106       end loop;
 107
 108       Add (Character'Val (Style_Check_Indentation + Character'Pos ('0')),
 109            Style_Check_Indentation /= 0);
 110
 111       Add ('a', Style_Check_Attribute_Casing);
 112       Add ('b', Style_Check_Blanks_At_End);
 113       Add ('c', Style_Check_Comments);
 114       Add ('d', Style_Check_DOS_Line_Terminator);
 115       Add ('e', Style_Check_End_Labels);
 116       Add ('f', Style_Check_Form_Feeds);
 117       Add ('h', Style_Check_Horizontal_Tabs);
 118       Add ('i', Style_Check_If_Then_Layout);
 119       Add ('I', Style_Check_Mode_In);
 120       Add ('k', Style_Check_Keyword_Casing);
 121       Add ('l', Style_Check_Layout);
 122       Add ('n', Style_Check_Standard);
 123       Add ('o', Style_Check_Order_Subprograms);
 124       Add ('p', Style_Check_Pragma_Casing);
 125       Add ('r', Style_Check_References);
 126       Add ('s', Style_Check_Specs);
 127       Add ('t', Style_Check_Tokens);
 128       Add ('u', Style_Check_Blank_Lines);
 129       Add ('x', Style_Check_Xtra_Parens);
 130
 131       if Style_Check_Max_Line_Length then
 132          P := P + 1;
 133          Options (P) := 'M';
 134          Add_Nat (Style_Max_Line_Length);
 135       end if;
 136
 137       if Style_Check_Max_Nesting_Level then
 138          P := P + 1;
 139          Options (P) := 'L';
 140          Add_Nat (Style_Max_Nesting_Level);
 141       end if;
 142
 143       pragma Assert (P <= Options'Last);
 144
 145       while P < Options'Last loop
 146          P := P + 1;
 147          Options (P) := ' ';
 148       end loop;
 149    end Save_Style_Check_Options;
 150
 151    -------------------------------------
 152    -- Set_Default_Style_Check_Options --
 153    -------------------------------------
 154
 155    procedure Set_Default_Style_Check_Options is
 156    begin
 157       Reset_Style_Check_Options;
 158       Set_Style_Check_Options ("3abcefhiklmnprst");
 159    end Set_Default_Style_Check_Options;
 160
 161    -----------------------------
 162    -- Set_Style_Check_Options --
 163    -----------------------------
 164
 165    --  Version used when no error checking is required
 166
 167    procedure Set_Style_Check_Options (Options : String) is
 168       OK : Boolean;
 169       EC : Natural;
 170    begin
 171       Set_Style_Check_Options (Options, OK, EC);
 172       pragma Assert (OK);
 173    end Set_Style_Check_Options;
 174
 175    --  Normal version with error checking
 176
 177    procedure Set_Style_Check_Options
 178      (Options  : String;
 179       OK       : out Boolean;
 180       Err_Col  : out Natural)
 181    is
 182       C : Character;
 183
 184       procedure Add_Img (N : Natural);
 185       --  Concatenates image of N at end of Style_Msg_Buf
 186
 187       procedure Bad_Style_Switch (Msg : String);
 188       --  Called if bad style switch found. Msg is mset in Style_Msg_Buf and
 189       --  Style_Msg_Len. OK is set False.
 190
 191       -------------
 192       -- Add_Img --
 193       -------------
 194
 195       procedure Add_Img (N : Natural) is
 196       begin
 197          if N >= 10 then
 198             Add_Img (N / 10);
 199          end if;
 200
 201          Style_Msg_Len := Style_Msg_Len + 1;
 202          Style_Msg_Buf (Style_Msg_Len) :=
 203            Character'Val (N mod 10 + Character'Pos ('0'));
 204       end Add_Img;
 205
 206       ----------------------
 207       -- Bad_Style_Switch --
 208       ----------------------
 209
 210       procedure Bad_Style_Switch (Msg : String) is
 211       begin
 212          OK := False;
 213          Style_Msg_Len := Msg'Length;
 214          Style_Msg_Buf (1 .. Style_Msg_Len) := Msg;
 215       end Bad_Style_Switch;
 216
 217    --  Start of processing for Set_Style_Check_Options
 218
 219    begin
 220       Err_Col := Options'First;
 221       while Err_Col <= Options'Last loop
 222          C := Options (Err_Col);
 223          Err_Col := Err_Col + 1;
 224
 225          case C is
 226             when '1' .. '9' =>
 227                Style_Check_Indentation :=
 228                  Character'Pos (C) - Character'Pos ('0');
 229
 230             when 'a' =>
 231                Style_Check_Attribute_Casing    := True;
 232
 233             when 'b' =>
 234                Style_Check_Blanks_At_End       := True;
 235
 236             when 'c' =>
 237                Style_Check_Comments            := True;
 238
 239             when 'd' =>
 240                Style_Check_DOS_Line_Terminator := True;
 241
 242             when 'e' =>
 243                Style_Check_End_Labels          := True;
 244
 245             when 'f' =>
 246                Style_Check_Form_Feeds          := True;
 247
 248             when 'h' =>
 249                Style_Check_Horizontal_Tabs     := True;
 250
 251             when 'i' =>
 252                Style_Check_If_Then_Layout      := True;
 253
 254             when 'I' =>
 255                Style_Check_Mode_In             := True;
 256
 257             when 'k' =>
 258                Style_Check_Keyword_Casing      := True;
 259
 260             when 'l' =>
 261                Style_Check_Layout              := True;
 262
 263             when 'L' =>
 264                Style_Max_Nesting_Level := 0;
 265
 266                if Err_Col > Options'Last
 267                  or else Options (Err_Col) not in '0' .. '9'
 268                then
 269                   Bad_Style_Switch ("invalid nesting level");
 270                   return;
 271                end if;
 272
 273                loop
 274                   Style_Max_Nesting_Level :=
 275                     Style_Max_Nesting_Level * 10 +
 276                       Character'Pos (Options (Err_Col)) - Character'Pos ('0');
 277
 278                   if Style_Max_Nesting_Level > 999 then
 279                      Bad_Style_Switch
 280                        ("max nesting level (999) exceeded in style check");
 281                      return;
 282                   end if;
 283
 284                   Err_Col := Err_Col + 1;
 285                   exit when Err_Col > Options'Last
 286                     or else Options (Err_Col) not in '0' .. '9';
 287                end loop;
 288
 289                Style_Check_Max_Nesting_Level := Style_Max_Nesting_Level /= 0;
 290
 291             when 'm' =>
 292                Style_Check_Max_Line_Length     := True;
 293                Style_Max_Line_Length           := 79;
 294
 295             when 'M' =>
 296                Style_Max_Line_Length := 0;
 297
 298                if Err_Col > Options'Last
 299                  or else Options (Err_Col) not in '0' .. '9'
 300                then
 301                   Bad_Style_Switch
 302                     ("invalid line length in style check");
 303                   return;
 304                end if;
 305
 306                loop
 307                   Style_Max_Line_Length :=
 308                     Style_Max_Line_Length * 10 +
 309                       Character'Pos (Options (Err_Col)) - Character'Pos ('0');
 310
 311                   if Style_Max_Line_Length > Int (Max_Line_Length) then
 312                      OK := False;
 313                      Style_Msg_Buf (1 .. 27) := "max line length allowed is ";
 314                      Style_Msg_Len := 27;
 315                      Add_Img (Natural (Max_Line_Length));
 316                      return;
 317                   end if;
 318
 319                   Err_Col := Err_Col + 1;
 320                   exit when Err_Col > Options'Last
 321                     or else Options (Err_Col) not in '0' .. '9';
 322                end loop;
 323
 324                Style_Check_Max_Line_Length   := Style_Max_Line_Length /= 0;
 325
 326             when 'n' =>
 327                Style_Check_Standard            := True;
 328
 329             when 'N' =>
 330                Reset_Style_Check_Options;
 331
 332             when 'o' =>
 333                Style_Check_Order_Subprograms   := True;
 334
 335             when 'p' =>
 336                Style_Check_Pragma_Casing       := True;
 337
 338             when 'r' =>
 339                Style_Check_References          := True;
 340
 341             when 's' =>
 342                Style_Check_Specs               := True;
 343
 344             when 't' =>
 345                Style_Check_Tokens              := True;
 346
 347             when 'u' =>
 348                Style_Check_Blank_Lines         := True;
 349
 350             when 'x' =>
 351                Style_Check_Xtra_Parens         := True;
 352
 353             when ' ' =>
 354                null;
 355
 356             when others =>
 357                Err_Col := Err_Col - 1;
 358                Style_Msg_Buf (1 .. 21) := "invalid style switch:";
 359                Style_Msg_Len := 22;
 360                Style_Msg_Buf (Style_Msg_Len) := C;
 361                OK := False;
 362                return;
 363          end case;
 364       end loop;
 365
 366       Style_Check := True;
 367       OK := True;
 368    end Set_Style_Check_Options;
 369 end Stylesw;