gcc/ada/gnatpsta.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                          GNAT SYSTEM UTILITIES                           --
   4 --                                                                          --
   5 --                            G N A T P S T A                               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                                                                          --
  10 --          Copyright (C) 1997-2001 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 -- GNAT was originally developed  by the GNAT team at  New York University. --
  24 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  25 --                                                                          --
  26 ------------------------------------------------------------------------------
  27
  28 --  Program to print out listing of Standard package for the target (not
  29 --  the host) with all constants appearing explicitly. This is not really
  30 --  valid Ada, since one cannot really define new base types, but it is a
  31 --  helpful listing from a documentation point of view.
  32
  33 --  Note that special care has been taken to use the host parameters for
  34 --  integer and floating point sizes.
  35
  36 with Ada.Text_IO; use Ada.Text_IO;
  37 with Gnatvsn;
  38 with Ttypef;      use Ttypef;
  39 with Ttypes;      use Ttypes;
  40 with Types;       use Types;
  41
  42 procedure GnatPsta is
  43    pragma Ident (Gnatvsn.Gnat_Version_String);
  44
  45    procedure P (Item : String) renames Ada.Text_IO.Put_Line;
  46
  47    procedure P_Int_Range   (Size : Pos; Put_First : Boolean := True);
  48    --  Prints the range of an integer based on its Size. If Put_First is
  49    --  False, then skip the first bound.
  50
  51    procedure P_Float_Range (Nb_Digits : Pos);
  52    --  Prints the maximum range of a Float whose 'Digits is given by Nb_Digits
  53
  54    -------------------
  55    -- P_Float_Range --
  56    -------------------
  57
  58    procedure P_Float_Range (Nb_Digits : Pos) is
  59    begin
  60       --  This routine assumes only IEEE floats.
  61       --  ??? Should the following be adapted for OpenVMS ?
  62
  63       case Nb_Digits is
  64          when IEEES_Digits =>
  65             P ("     range " & IEEES_First'Universal_Literal_String & " .. " &
  66                                IEEES_Last'Universal_Literal_String & ";");
  67          when IEEEL_Digits =>
  68             P ("     range " & IEEEL_First'Universal_Literal_String & " .. " &
  69                                IEEEL_Last'Universal_Literal_String & ";");
  70          when IEEEX_Digits =>
  71             P ("     range " & IEEEX_First'Universal_Literal_String & " .. " &
  72                                IEEEX_Last'Universal_Literal_String & ";");
  73
  74          when others =>
  75             P (";");
  76       end case;
  77
  78       --  If one of the floating point types of the host computer has the
  79       --  same digits as the target float we are processing, then print out
  80       --  the float range using the host computer float type.
  81
  82       if Nb_Digits = Short_Float'Digits then
  83          P ("     --    " &
  84             Short_Float'First'Img & " .. " & Short_Float'Last'Img);
  85
  86       elsif Nb_Digits = Float'Digits then
  87          P ("     --    " &
  88             Float'First'Img & " .. " & Float'Last'Img);
  89
  90       elsif Nb_Digits = Long_Float'Digits then
  91          P ("     --    " &
  92             Long_Float'First'Img & " .. " & Long_Float'Last'Img);
  93
  94       elsif Nb_Digits = Long_Long_Float'Digits then
  95          P ("     --    " &
  96             Long_Long_Float'First'Img & " .. " & Long_Long_Float'Last'Img);
  97       end if;
  98
  99       New_Line;
 100    end P_Float_Range;
 101
 102    -----------------
 103    -- P_Int_Range --
 104    -----------------
 105
 106    procedure P_Int_Range (Size : Pos; Put_First : Boolean := True) is
 107    begin
 108       if Put_First then
 109          Put (" is range -(2 **" & Pos'Image (Size - 1) & ")");
 110       end if;
 111       P (" .. +(2 **" & Pos'Image (Size - 1) & " - 1);");
 112    end P_Int_Range;
 113
 114 --  Start of processing for GnatPsta
 115
 116 begin
 117    P ("package Standard is");
 118    P ("pragma Pure(Standard);");
 119    New_Line;
 120
 121    P ("   type Boolean is (False, True);");
 122    New_Line;
 123
 124    --  Integer types
 125
 126    Put ("   type Integer");
 127    P_Int_Range (Standard_Integer_Size);
 128    New_Line;
 129
 130    Put ("   subtype Natural  is Integer range 0");
 131    P_Int_Range (Standard_Integer_Size, Put_First => False);
 132
 133    Put ("   subtype Positive is Integer range 1");
 134    P_Int_Range (Standard_Integer_Size, Put_First => False);
 135    New_Line;
 136
 137    Put ("   type Short_Short_Integer");
 138    P_Int_Range (Standard_Short_Short_Integer_Size);
 139
 140    Put ("   type Short_Integer      ");
 141    P_Int_Range (Standard_Short_Integer_Size);
 142
 143    Put ("   type Long_Integer       ");
 144    P_Int_Range (Standard_Long_Integer_Size);
 145
 146    Put ("   type Long_Long_Integer  ");
 147    P_Int_Range (Standard_Long_Long_Integer_Size);
 148    New_Line;
 149
 150    --  Floating point types
 151
 152    P ("   type Short_Float     is digits"
 153       & Standard_Short_Float_Digits'Img);
 154    P_Float_Range (Standard_Short_Float_Digits);
 155
 156    P ("   type Float           is digits"
 157       & Standard_Float_Digits'Img);
 158    P_Float_Range (Standard_Float_Digits);
 159
 160    P ("   type Long_Float      is digits"
 161       & Standard_Long_Float_Digits'Img);
 162    P_Float_Range (Standard_Long_Float_Digits);
 163
 164    P ("   type Long_Long_Float is digits"
 165       & Standard_Long_Long_Float_Digits'Img);
 166    P_Float_Range (Standard_Long_Long_Float_Digits);
 167
 168    P ("   --  function ""*"" (Left : root_integer; Right : root_real)");
 169    P ("   --    return root_real;");
 170    New_Line;
 171
 172    P ("   --  function ""*"" (Left : root_real;    Right : root_integer)");
 173    P ("   --    return root_real;");
 174    New_Line;
 175
 176    P ("   --  function ""/"" (Left : root_real;    Right : root_integer)");
 177    P ("   --    return root_real;");
 178    New_Line;
 179
 180    P ("   --  function ""*"" (Left : universal_fixed; " &
 181                                                 "Right : universal_fixed)");
 182    P ("   --    return universal_fixed;");
 183    New_Line;
 184
 185    P ("   --  function ""/"" (Left : universal_fixed; " &
 186                                                 "Right : universal_fixed)");
 187    P ("   --    return universal_fixed;");
 188    New_Line;
 189
 190    P ("   --  The declaration of type Character is based on the standard");
 191    P ("   --  ISO 8859-1 character set.");
 192    New_Line;
 193
 194    P ("   --  There are no character literals corresponding to the positions");
 195    P ("   --  for control characters. They are indicated by lower case");
 196    P ("   --  identifiers in the following list.");
 197    New_Line;
 198
 199    P ("   --  Note: this type cannot be represented accurately in Ada");
 200    New_Line;
 201
 202    P ("   --  type Character is");
 203    New_Line;
 204
 205    P ("   --    (nul,  soh,  stx,  etx,     eot,  enq,  ack,  bel,");
 206    P ("   --     bs,   ht,   lf,   vt,      ff,   cr,   so,   si,");
 207    New_Line;
 208
 209    P ("   --     dle,  dc1,  dc2,  dc3,     dc4,  nak,  syn,  etb,");
 210    P ("   --     can,  em,   sub,  esc,     fs,   gs,   rs,   us,");
 211    New_Line;
 212
 213    P ("   --     ' ',  '!',  '""', '#',     '$',  '%',  '&',  ''',");
 214    P ("   --     '(',  ')',  '*',  '+',     ',',  '-',  '.',  '/',");
 215    New_Line;
 216
 217    P ("   --     '0',  '1',  '2',  '3',     '4',  '5',  '6',  '7',");
 218    P ("   --     '8',  '9',  ':',  ';',     '<',  '=',  '>',  '?',");
 219    New_Line;
 220
 221    P ("   --     '@',  'A',  'B',  'C',     'D',  'E',  'F',  'G',");
 222    P ("   --     'H',  'I',  'J',  'K',     'L',  'M',  'N',  'O',");
 223    New_Line;
 224
 225    P ("   --     'P',  'Q',  'R',  'S',     'T',  'U',  'V',  'W',");
 226    P ("   --     'X',  'Y',  'Z',  '[',     '\',  ']',  '^',  '_',");
 227    New_Line;
 228
 229    P ("   --     '`',  'a',  'b',  'c',     'd',  'e',  'f',  'g',");
 230    P ("   --     'h',  'i',  'j',  'k',     'l',  'm',  'n',  'o',");
 231    New_Line;
 232
 233    P ("   --     'p',  'q',  'r',  's',     't',  'u',  'v',  'w',");
 234    P ("   --     'x',  'y',  'z',  '{',     '|',  '}',  '~',  del,");
 235    New_Line;
 236
 237    P ("   --     reserved_128,     reserved_129,  bph,  nbh,");
 238    P ("   --     reserved_132,     nel,     ssa,  esa,");
 239    New_Line;
 240
 241    P ("   --     hts,  htj,  vts,  pld,     plu,  ri,   ss2,  ss3,");
 242    New_Line;
 243
 244    P ("   --     dcs,  pu1,  pu2,  sts,     cch,  mw,   spa,  epa,");
 245    New_Line;
 246
 247    P ("   --     sos, reserved_153, sci, csi,");
 248    P ("   --     st,   osc,  pm,   apc,");
 249    New_Line;
 250
 251    P ("   --   ... );");
 252    New_Line;
 253
 254    P ("   --  The declaration of type Wide_Character is based " &
 255                                                         "on the standard");
 256    P ("   --  ISO 10646 BMP character set.");
 257    New_Line;
 258
 259    P ("   --  Note: this type cannot be represented accurately in Ada");
 260    New_Line;
 261
 262    P ("   --  The first 256 positions have the same contents as " &
 263                                                         "type Character");
 264    New_Line;
 265
 266    P ("   --  type Wide_Character is (nul, soh ... FFFE, FFFF);");
 267    New_Line;
 268
 269    P ("   package ASCII is");
 270    New_Line;
 271
 272    P ("      --  Control characters:");
 273    New_Line;
 274
 275    P ("      NUL   : constant Character := Character'Val (16#00#);");
 276    P ("      SOH   : constant Character := Character'Val (16#01#);");
 277    P ("      STX   : constant Character := Character'Val (16#02#);");
 278    P ("      ETX   : constant Character := Character'Val (16#03#);");
 279    P ("      EOT   : constant Character := Character'Val (16#04#);");
 280    P ("      ENQ   : constant Character := Character'Val (16#05#);");
 281    P ("      ACK   : constant Character := Character'Val (16#06#);");
 282    P ("      BEL   : constant Character := Character'Val (16#07#);");
 283    P ("      BS    : constant Character := Character'Val (16#08#);");
 284    P ("      HT    : constant Character := Character'Val (16#09#);");
 285    P ("      LF    : constant Character := Character'Val (16#0A#);");
 286    P ("      VT    : constant Character := Character'Val (16#0B#);");
 287    P ("      FF    : constant Character := Character'Val (16#0C#);");
 288    P ("      CR    : constant Character := Character'Val (16#0D#);");
 289    P ("      SO    : constant Character := Character'Val (16#0E#);");
 290    P ("      SI    : constant Character := Character'Val (16#0F#);");
 291    P ("      DLE   : constant Character := Character'Val (16#10#);");
 292    P ("      DC1   : constant Character := Character'Val (16#11#);");
 293    P ("      DC2   : constant Character := Character'Val (16#12#);");
 294    P ("      DC3   : constant Character := Character'Val (16#13#);");
 295    P ("      DC4   : constant Character := Character'Val (16#14#);");
 296    P ("      NAK   : constant Character := Character'Val (16#15#);");
 297    P ("      SYN   : constant Character := Character'Val (16#16#);");
 298    P ("      ETB   : constant Character := Character'Val (16#17#);");
 299    P ("      CAN   : constant Character := Character'Val (16#18#);");
 300    P ("      EM    : constant Character := Character'Val (16#19#);");
 301    P ("      SUB   : constant Character := Character'Val (16#1A#);");
 302    P ("      ESC   : constant Character := Character'Val (16#1B#);");
 303    P ("      FS    : constant Character := Character'Val (16#1C#);");
 304    P ("      GS    : constant Character := Character'Val (16#1D#);");
 305    P ("      RS    : constant Character := Character'Val (16#1E#);");
 306    P ("      US    : constant Character := Character'Val (16#1F#);");
 307    P ("      DEL   : constant Character := Character'Val (16#7F#);");
 308    New_Line;
 309
 310    P ("      -- Other characters:");
 311    New_Line;
 312
 313    P ("      Exclam     : constant Character := '!';");
 314    P ("      Quotation  : constant Character := '""';");
 315    P ("      Sharp      : constant Character := '#';");
 316    P ("      Dollar     : constant Character := '$';");
 317    P ("      Percent    : constant Character := '%';");
 318    P ("      Ampersand  : constant Character := '&';");
 319    P ("      Colon      : constant Character := ':';");
 320    P ("      Semicolon  : constant Character := ';';");
 321    P ("      Query      : constant Character := '?';");
 322    P ("      At_Sign    : constant Character := '@';");
 323    P ("      L_Bracket  : constant Character := '[';");
 324    P ("      Back_Slash : constant Character := '\';");
 325    P ("      R_Bracket  : constant Character := ']';");
 326    P ("      Circumflex : constant Character := '^';");
 327    P ("      Underline  : constant Character := '_';");
 328    P ("      Grave      : constant Character := '`';");
 329    P ("      L_Brace    : constant Character := '{';");
 330    P ("      Bar        : constant Character := '|';");
 331    P ("      R_Brace    : constant Character := '}';");
 332    P ("      Tilde      : constant Character := '~';");
 333    New_Line;
 334
 335    P ("      -- Lower case letters:");
 336    New_Line;
 337
 338    for C in Character range 'a' .. 'z' loop
 339       P ("      LC_" & Character'Val (Character'Pos (C) - 32) &
 340                   " : constant Character := '" & C & "';");
 341    end loop;
 342    New_Line;
 343
 344    P ("   end ASCII;");
 345    New_Line;
 346
 347    P ("   type String is array (Positive range <>) of Character;");
 348    P ("   pragma Pack (String);");
 349    New_Line;
 350
 351    P ("   type Wide_String is array (Positive range <>) of Wide_Character;");
 352    P ("   pragma Pack (Wide_String);");
 353    New_Line;
 354
 355    --  Here it's OK to use the Duration type of the host compiler since
 356    --  the implementation of Duration in GNAT is target independent.
 357
 358    P ("   type Duration is delta" &
 359             Duration'Image (Duration'Delta));
 360    P ("     range -((2 **" & Natural'Image (Duration'Size - 1) &
 361               " - 1) *" & Duration'Image (Duration'Delta) & ") ..");
 362    P ("           +((2 **" & Natural'Image (Duration'Size - 1) &
 363               " - 1) *" & Duration'Image (Duration'Delta) & ");");
 364    P ("   for Duration'Small use" & Duration'Image (Duration'Small) & ";");
 365    New_Line;
 366
 367    P ("   Constraint_Error : exception;");
 368    P ("   Program_Error    : exception;");
 369    P ("   Storage_Error    : exception;");
 370    P ("   Tasking_Error    : exception;");
 371    New_Line;
 372
 373    P ("end Standard;");
 374 end GnatPsta;