old-autovect-branch/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) 1992-2005, 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_Order_Subprograms   := False;
  53       Style_Check_Pragma_Casing       := False;
  54       Style_Check_References          := False;
  55       Style_Check_Specs               := False;
  56       Style_Check_Standard            := False;
  57       Style_Check_Tokens              := False;
  58       Style_Check_Xtra_Parens         := False;
  59    end Reset_Style_Check_Options;
  60
  61    ------------------------------
  62    -- Save_Style_Check_Options --
  63    ------------------------------
  64
  65    procedure Save_Style_Check_Options (Options : out Style_Check_Options) is
  66       P : Natural := 0;
  67
  68       procedure Add (C : Character; S : Boolean);
  69       --  Add given character C to string if switch S is true
  70
  71       procedure Add_Nat (N : Nat);
  72       --  Add given natural number to string
  73
  74       ---------
  75       -- Add --
  76       ---------
  77
  78       procedure Add (C : Character; S : Boolean) is
  79       begin
  80          if S then
  81             P := P + 1;
  82             Options (P) := C;
  83          end if;
  84       end Add;
  85
  86       -------------
  87       -- Add_Nat --
  88       -------------
  89
  90       procedure Add_Nat (N : Nat) is
  91       begin
  92          if N > 9 then
  93             Add_Nat (N / 10);
  94          end if;
  95
  96          P := P + 1;
  97          Options (P) := Character'Val (Character'Pos ('0') + N mod 10);
  98       end Add_Nat;
  99
 100    --  Start of processing for Save_Style_Check_Options
 101
 102    begin
 103       for K in Options'Range loop
 104          Options (K) := ' ';
 105       end loop;
 106
 107       Add (Character'Val (Style_Check_Indentation + Character'Pos ('0')),
 108            Style_Check_Indentation /= 0);
 109
 110       Add ('a', Style_Check_Attribute_Casing);
 111       Add ('b', Style_Check_Blanks_At_End);
 112       Add ('c', Style_Check_Comments);
 113       Add ('d', Style_Check_DOS_Line_Terminator);
 114       Add ('e', Style_Check_End_Labels);
 115       Add ('f', Style_Check_Form_Feeds);
 116       Add ('h', Style_Check_Horizontal_Tabs);
 117       Add ('i', Style_Check_If_Then_Layout);
 118       Add ('k', Style_Check_Keyword_Casing);
 119       Add ('l', Style_Check_Layout);
 120       Add ('n', Style_Check_Standard);
 121       Add ('o', Style_Check_Order_Subprograms);
 122       Add ('p', Style_Check_Pragma_Casing);
 123       Add ('r', Style_Check_References);
 124       Add ('s', Style_Check_Specs);
 125       Add ('t', Style_Check_Tokens);
 126       Add ('u', Style_Check_Blank_Lines);
 127       Add ('x', Style_Check_Xtra_Parens);
 128
 129       if Style_Check_Max_Line_Length then
 130          P := P + 1;
 131          Options (P) := 'M';
 132          Add_Nat (Style_Max_Line_Length);
 133       end if;
 134
 135       if Style_Check_Max_Nesting_Level then
 136          P := P + 1;
 137          Options (P) := 'L';
 138          Add_Nat (Style_Max_Nesting_Level);
 139       end if;
 140
 141       pragma Assert (P <= Options'Last);
 142
 143       while P < Options'Last loop
 144          P := P + 1;
 145          Options (P) := ' ';
 146       end loop;
 147    end Save_Style_Check_Options;
 148
 149    -------------------------------------
 150    -- Set_Default_Style_Check_Options --
 151    -------------------------------------
 152
 153    procedure Set_Default_Style_Check_Options is
 154    begin
 155       Reset_Style_Check_Options;
 156       Set_Style_Check_Options ("3abcefhiklmnprst");
 157    end Set_Default_Style_Check_Options;
 158
 159    -----------------------------
 160    -- Set_Style_Check_Options --
 161    -----------------------------
 162
 163    --  Version used when no error checking is required
 164
 165    procedure Set_Style_Check_Options (Options : String) is
 166       OK : Boolean;
 167       EC : Natural;
 168    begin
 169       Set_Style_Check_Options (Options, OK, EC);
 170       pragma Assert (OK);
 171    end Set_Style_Check_Options;
 172
 173    --  Normal version with error checking
 174
 175    procedure Set_Style_Check_Options
 176      (Options  : String;
 177       OK       : out Boolean;
 178       Err_Col  : out Natural)
 179    is
 180       C : Character;
 181
 182       procedure Add_Img (N : Natural);
 183       --  Concatenates image of N at end of Style_Msg_Buf
 184
 185       procedure Bad_Style_Switch (Msg : String);
 186       --  Called if bad style switch found. Msg is mset in Style_Msg_Buf and
 187       --  Style_Msg_Len. OK is set False.
 188
 189       -------------
 190       -- Add_Img --
 191       -------------
 192
 193       procedure Add_Img (N : Natural) is
 194       begin
 195          if N >= 10 then
 196             Add_Img (N / 10);
 197          end if;
 198
 199          Style_Msg_Len := Style_Msg_Len + 1;
 200          Style_Msg_Buf (Style_Msg_Len) :=
 201            Character'Val (N mod 10 + Character'Pos ('0'));
 202       end Add_Img;
 203
 204       ----------------------
 205       -- Bad_Style_Switch --
 206       ----------------------
 207
 208       procedure Bad_Style_Switch (Msg : String) is
 209       begin
 210          OK := False;
 211          Style_Msg_Len := Msg'Length;
 212          Style_Msg_Buf (1 .. Style_Msg_Len) := Msg;
 213       end Bad_Style_Switch;
 214
 215    --  Start of processing for Set_Style_Check_Options
 216
 217    begin
 218       Err_Col := Options'First;
 219       while Err_Col <= Options'Last loop
 220          C := Options (Err_Col);
 221          Err_Col := Err_Col + 1;
 222
 223          case C is
 224             when '1' .. '9' =>
 225                Style_Check_Indentation :=
 226                  Character'Pos (C) - Character'Pos ('0');
 227
 228             when 'a' =>
 229                Style_Check_Attribute_Casing    := True;
 230
 231             when 'b' =>
 232                Style_Check_Blanks_At_End       := True;
 233
 234             when 'c' =>
 235                Style_Check_Comments            := True;
 236
 237             when 'd' =>
 238                Style_Check_DOS_Line_Terminator := True;
 239
 240             when 'e' =>
 241                Style_Check_End_Labels          := True;
 242
 243             when 'f' =>
 244                Style_Check_Form_Feeds          := True;
 245
 246             when 'h' =>
 247                Style_Check_Horizontal_Tabs     := True;
 248
 249             when 'i' =>
 250                Style_Check_If_Then_Layout      := True;
 251
 252             when 'k' =>
 253                Style_Check_Keyword_Casing      := True;
 254
 255             when 'l' =>
 256                Style_Check_Layout              := True;
 257
 258             when 'L' =>
 259                Style_Max_Nesting_Level := 0;
 260
 261                if Err_Col > Options'Last
 262                  or else Options (Err_Col) not in '0' .. '9'
 263                then
 264                   Bad_Style_Switch ("invalid nesting level");
 265                   return;
 266                end if;
 267
 268                loop
 269                   Style_Max_Nesting_Level :=
 270                     Style_Max_Nesting_Level * 10 +
 271                       Character'Pos (Options (Err_Col)) - Character'Pos ('0');
 272
 273                   if Style_Max_Nesting_Level > 999 then
 274                      Bad_Style_Switch
 275                        ("max nesting level (999) exceeded in style check");
 276                      return;
 277                   end if;
 278
 279                   Err_Col := Err_Col + 1;
 280                   exit when Err_Col > Options'Last
 281                     or else Options (Err_Col) not in '0' .. '9';
 282                end loop;
 283
 284                Style_Check_Max_Nesting_Level := Style_Max_Nesting_Level /= 0;
 285
 286             when 'm' =>
 287                Style_Check_Max_Line_Length     := True;
 288                Style_Max_Line_Length           := 79;
 289
 290             when 'M' =>
 291                Style_Max_Line_Length := 0;
 292
 293                if Err_Col > Options'Last
 294                  or else Options (Err_Col) not in '0' .. '9'
 295                then
 296                   Bad_Style_Switch
 297                     ("invalid line length in style check");
 298                   return;
 299                end if;
 300
 301                loop
 302                   Style_Max_Line_Length :=
 303                     Style_Max_Line_Length * 10 +
 304                       Character'Pos (Options (Err_Col)) - Character'Pos ('0');
 305
 306                   if Style_Max_Line_Length > Int (Max_Line_Length) then
 307                      OK := False;
 308                      Style_Msg_Buf (1 .. 27) := "max line length allowed is ";
 309                      Style_Msg_Len := 27;
 310                      Add_Img (Natural (Max_Line_Length));
 311                      return;
 312                   end if;
 313
 314                   Err_Col := Err_Col + 1;
 315                   exit when Err_Col > Options'Last
 316                     or else Options (Err_Col) not in '0' .. '9';
 317                end loop;
 318
 319                Style_Check_Max_Line_Length   := Style_Max_Line_Length /= 0;
 320
 321             when 'n' =>
 322                Style_Check_Standard            := True;
 323
 324             when 'N' =>
 325                Reset_Style_Check_Options;
 326
 327             when 'o' =>
 328                Style_Check_Order_Subprograms   := True;
 329
 330             when 'p' =>
 331                Style_Check_Pragma_Casing       := True;
 332
 333             when 'r' =>
 334                Style_Check_References          := True;
 335
 336             when 's' =>
 337                Style_Check_Specs               := True;
 338
 339             when 't' =>
 340                Style_Check_Tokens              := True;
 341
 342             when 'u' =>
 343                Style_Check_Blank_Lines         := True;
 344
 345             when 'x' =>
 346                Style_Check_Xtra_Parens         := True;
 347
 348             when ' ' =>
 349                null;
 350
 351             when others =>
 352                Err_Col := Err_Col - 1;
 353                Style_Msg_Buf (1 .. 21) := "invalid style switch:";
 354                Style_Msg_Len := 22;
 355                Style_Msg_Buf (Style_Msg_Len) := C;
 356                OK := False;
 357                return;
 358          end case;
 359       end loop;
 360
 361       Style_Check := True;
 362       OK := True;
 363    end Set_Style_Check_Options;
 364 end Stylesw;