cloud-email/cryptography - python cryptography

about summary refs log tree commit diff stats

path: root/tests/hazmat/primitives/test_dsa.py

diff options

author	Alex Gaynor <alex.gaynor@gmail.com>	2014-05-21 11:29:25 -0700
committer	Alex Gaynor <alex.gaynor@gmail.com>	2014-05-21 11:29:25 -0700
commit	348926ef7efdde5ab673fe28dcaa8f399d4f91ee (patch)
tree	49b830bb061c660e1092e707e5199881ea638301 /tests/hazmat/primitives/test_dsa.py
parent	ae14644d2dbc98fe787c1d30a40934a682d71f23 (diff)
parent	88bac252904300ec65e8e475247a6c4c1fa4fe29 (diff)
download	cryptography-348926ef7efdde5ab673fe28dcaa8f399d4f91ee.tar.gz cryptography-348926ef7efdde5ab673fe28dcaa8f399d4f91ee.tar.bz2 cryptography-348926ef7efdde5ab673fe28dcaa8f399d4f91ee.zip

Merge pull request #1069 from reaperhulk/fix-hkdfexpand-changelog

fix changelog to link to hkdfexpand

Diffstat (limited to 'tests/hazmat/primitives/test_dsa.py')

0 files changed, 0 insertions, 0 deletions

='n158' href='#n158'>158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050

--  Loading of source files.
--  Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
--
--  GHDL 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, or (at your option) any later
--  version.
--
--  GHDL 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.
--
--  You should have received a copy of the GNU General Public License
--  along with GHDL; see the file COPYING.  If not, write to the Free
--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
--  02111-1307, USA.
with System;
with Interfaces.C;
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Unchecked_Deallocation;
with Tables;
with GNAT.OS_Lib;
with GNAT.SHA1;
with GNAT.Directory_Operations;
with Name_Table; use Name_Table;
with Str_Table;
with Ada.Calendar;
with Ada.Calendar.Time_Zones;

package body Files_Map is

   --  Check validity of FILE.
   --  Raise an exception in case of error.
   procedure Check_File (File: in Source_File_Entry);
   pragma Inline (Check_File);

   type Lines_Table_Type is array (Positive) of Source_Ptr;
   type Lines_Table_Ptr is access all Lines_Table_Type;

   --  There are several kinds of source file.
   type Source_File_Kind is
     (
      --  A *real* source file, read from the filesystem.
      Source_File_File,

      --  A virtual source file, created from a string.
      Source_File_String,

      --  A duplicated source file (there is no copy however), created by
      --  an instantiation.
      Source_File_Instance);

   --  Data associed with a file.
   type Source_File_Record (Kind : Source_File_Kind := Source_File_File) is
      record
      --  All location between first and last belong to this file.
      First_Location : Location_Type;
      Last_Location : Location_Type;

      --  The name_id that identify this file.
      --  FIXME: what about file aliasing (links) ?
      File_Name : Name_Id;

      Directory : Name_Id;

      --  The buffer containing the file.
      Source : File_Buffer_Acc;

      --  Length of the file, which is also the length of the buffer.
      File_Length : Natural;

      Checksum : File_Checksum_Id;

      case Kind is
         when Source_File_File =>
            --  Line table

            --  Current number of line in Lines_Table.
            Nbr_Lines : Natural;

            Lines_Table : Lines_Table_Ptr;

            --  Current size of Lines_Table.
            Lines_Table_Max : Natural;

            --  Cache for line table.
            Cache_Line : Natural;
            Cache_Pos : Source_Ptr;

         when Source_File_String =>
            --  There is only one line.
            null;

         when Source_File_Instance =>
            --  The instance was created from REF.
            Ref : Source_File_Entry;
            --  The ultimate non-instance is BASE.
            Base : Source_File_Entry;

            Instance_Loc : Location_Type;
      end case;
   end record;

   --  Next location to use.
   Next_Location : Location_Type := Location_Nil + 1;

   package Source_Files is new Tables
     (Table_Index_Type => Source_File_Entry,
      Table_Component_Type => Source_File_Record,
      Table_Low_Bound => No_Source_File_Entry + 1,
      Table_Initial => 16);

   function Get_Last_Source_File_Entry return Source_File_Entry is
   begin
      return Source_Files.Last;
   end Get_Last_Source_File_Entry;

   Home_Dir : Name_Id := Null_Identifier;

   function Get_Home_Directory return Name_Id is
   begin
      if Home_Dir = Null_Identifier then
         GNAT.Directory_Operations.Get_Current_Dir (Nam_Buffer, Nam_Length);
         Home_Dir := Get_Identifier;
      end if;
      return Home_Dir;
   end Get_Home_Directory;

   procedure Location_To_File_Pos (Location : Location_Type;
                                   File : out Source_File_Entry;
                                   Pos : out Source_Ptr) is
   begin
      --  FIXME: use a cache
      --  FIXME: dicotomy
      for I in Source_Files.First .. Source_Files.Last loop
         declare
            F : Source_File_Record renames Source_Files.Table (I);
         begin
            if Location >= F.First_Location
              and then Location <= F.Last_Location
            then
               File := I;
               Pos := Source_Ptr (Location - F.First_Location);
               return;
            end if;
         end;
      end loop;
      --  File not found, location must be bad...
      raise Internal_Error;
   end Location_To_File_Pos;

   function File_Pos_To_Location (File : Source_File_Entry; Pos : Source_Ptr)
                                 return Location_Type
   is
      pragma Assert (File <= Source_Files.Last);
   begin
      return Source_Files.Table (File).First_Location + Location_Type (Pos);
   end File_Pos_To_Location;

   function Source_File_To_Location (File : Source_File_Entry)
                                    return Location_Type
   is
      pragma Assert (File <= Source_Files.Last);
   begin
      return Source_Files.Table (File).First_Location;
   end Source_File_To_Location;

   procedure Reallocate_Lines_Table
     (File: in out Source_File_Record; New_Size: Natural) is
      use Interfaces.C;

      function realloc
        (memblock : Lines_Table_Ptr;
         size     : size_t)
         return     Lines_Table_Ptr;
      pragma Import (C, realloc);

      function malloc
        (size     : size_t)
         return     Lines_Table_Ptr;
      pragma Import (C, malloc);

      New_Table: Lines_Table_Ptr;
      New_Byte_Size : size_t;
   begin
      New_Byte_Size :=
        size_t(New_Size *
                Lines_Table_Type'Component_Size / System.Storage_Unit);
      if File.Lines_Table = null then
         New_Table := malloc (New_Byte_Size);
      else
         New_Table := realloc (File.Lines_Table, New_Byte_Size);
      end if;
      if New_Table = null then
         raise Storage_Error;
      else
         File.Lines_Table := New_Table;
         File.Lines_Table (File.Lines_Table_Max + 1 .. New_Size) :=
           (others => Source_Ptr_Bad);
         File.Lines_Table_Max := New_Size;
      end if;
   end Reallocate_Lines_Table;

   --  Add a new entry in the lines_table.
   --  The new entry must be the next one after the last entry.
   procedure File_Add_Line_Number
     (File: Source_File_Entry; Line: Natural; Pos: Source_Ptr)
   is
      -- Just check File is not out of bounds.
      pragma Assert (File <= Source_Files.Last);

      Source_File: Source_File_Record renames Source_Files.Table (File);
   begin
      --  Can only add line number to a real file.
      pragma Assert (Source_File.Kind = Source_File_File);

      --  Debug trace.
      if False then
         Put_Line ("file" & Source_File_Entry'Image (File)
                   & " line" & Natural'Image (Line)
                   & " at position" & Source_Ptr'Image (Pos));
      end if;

      --  The position of the first line is well-known.
      pragma Assert (Line = 1 xor Pos /= Source_Ptr_Org);

      if Line > Source_File.Lines_Table_Max then
         Reallocate_Lines_Table (Source_File, (Line / 128 + 1) * 128);
      end if;

      --  Lines are in increasing order.
      pragma Assert
        (Line = 1
           or else Source_File.Lines_Table (Line - 1) = Source_Ptr_Bad
           or else Source_File.Lines_Table (Line - 1) < Pos);
      pragma Assert
        (Line = Source_File.Lines_Table_Max
           or else Source_File.Lines_Table (Line + 1) = Source_Ptr_Bad
           or else Source_File.Lines_Table (Line + 1) > Pos);

      if Source_File.Lines_Table (Line) = Source_Ptr_Bad then
         Source_File.Lines_Table (Line) := Pos;
      else
         --  If the line position is already known, it must be the same.
         if Pos /= Source_File.Lines_Table (Line) then
            Put_Line ("file" & Source_File_Entry'Image (File)
                        & " for line" & Natural'Image (Line)
                        & " pos =" & Source_Ptr'Image (Pos)
                        & ", lines_table = "
                        & Source_Ptr'Image (Source_File.Lines_Table (Line)));
            raise Internal_Error;
         end if;
      end if;

      if Line > Source_File.Nbr_Lines then
         Source_File.Nbr_Lines := Line;
      end if;
   end File_Add_Line_Number;

   --  Convert a physical column to a logical column.
   --  A physical column is the offset in byte from the first byte of the line.
   --  A logical column is the position of the character when displayed.
   --  A HT (tabulation) moves the cursor to the next position multiple of 8.
   --  The first character is at position 1 and at offset 0.
   procedure Coord_To_Position (File : Source_File_Entry;
                                Line_Pos : Source_Ptr;
                                Offset : Natural;
                                Name : out Name_Id;
                                Col : out Natural)
   is
      Source_File: Source_File_Record renames Source_Files.Table (File);
      Res : Positive := 1;
   begin
      Name := Source_File.File_Name;
      if Offset = 0 then
         Col := Res;
      else
         for I in Line_Pos .. Line_Pos + Source_Ptr (Offset) - 1 loop
            if Source_File.Source (I) = ASCII.HT then
               Res := Res + 8 - Res mod 8;
            else
               Res := Res + 1;
            end if;
         end loop;
         Col := Res;
      end if;
   end Coord_To_Position;

   --  Should only be called by Location_To_Coord.
   function Location_To_Line
     (Source_File : Source_File_Record; Pos : Source_Ptr) return Natural
   is
      Lines_Table : constant Lines_Table_Ptr := Source_File.Lines_Table;
      Low, Hi, Mid : Natural;
      Mid1 : Natural;
   begin
      --  Look in the cache.
      if Pos >= Source_File.Cache_Pos then
         Low := Source_File.Cache_Line;
         Hi := Source_File.Nbr_Lines;
      else
         Low := 1;
         Hi := Source_File.Cache_Line;
      end if;

      loop
         << Again >> null;
         Mid := (Hi + Low) / 2;
         if Lines_Table (Mid) = Source_Ptr_Bad then
            -- There is a hole: no position for this line.
            -- Set MID1 to a line which has a position.
            -- Try downward.
            Mid1 := Mid;
            while Lines_Table (Mid1) = Source_Ptr_Bad loop
               --  Note: Low may have no line.
               exit when Mid1 = Low;
               Mid1 := Mid1 - 1;
            end loop;
            if Mid1 /= Low then
               --  Mid1 has a line.
               if Pos < Lines_Table (Mid1) then
                  Hi := Mid1;
                  goto Again;
               end if;
               if Pos > Lines_Table (Mid1) then
                  Low := Mid1;
                  goto Again;
               end if;
               --  Found, handled just below.
            else
               --  Failed (downward is LOW): try upward.
               Mid1 := Mid;
               while Lines_Table (Mid1) = Source_Ptr_Bad loop
                  Mid1 := Mid1 + 1;
               end loop;
               if Mid1 = Hi then
                  --  Failed: no lines between LOW and HI.
                  if Pos >= Lines_Table (Hi) then
                     Mid1 := Hi;
                  else
                     Mid1 := Low;
                  end if;
                  return Mid1;
               end if;
               --  Mid1 has a line.
               if Pos < Lines_Table (Mid1) then
                  Hi := Mid1;
                  goto Again;
               end if;
               if Pos > Lines_Table (Mid1) then
                  Low := Mid1;
                  goto Again;
               end if;
            end if;
            Mid := Mid1;
         end if;

         --  Mid is on a known line.
         pragma Assert (Lines_Table (Mid) /= Source_Ptr_Bad);

         if Pos >= Lines_Table (Mid) then
            if Mid = Source_File.Nbr_Lines
              or else (Lines_Table (Mid + 1) /= Source_Ptr_Bad
                         and then Pos < Lines_Table (Mid + 1))
              or else Pos = Lines_Table (Mid)
              or else (Hi <= Mid + 1
                       and Lines_Table (Mid + 1) = Source_Ptr_Bad)
            then
               return Mid;
            end if;
         end if;
         if Pos < Lines_Table (Mid) then
            Hi := Mid - 1;
         else
            if Lines_Table (Mid + 1) /= Source_Ptr_Bad then
               Low := Mid + 1;
            else
               Low := Mid;
            end if;
         end if;
      end loop;
   end Location_To_Line;

   --  Internal procedure
   procedure Location_To_Coord (Source_File : in out Source_File_Record;
                                Pos : Source_Ptr;
                                Line_Pos : out Source_Ptr;
                                Line : out Natural;
                                Offset : out Natural)
   is
      Line_P : Source_Ptr;
      Line_Threshold : constant Natural := 4;
      Low, Hi : Natural;
   begin
      --  Look in the cache.
      if Pos >= Source_File.Cache_Pos then
         Low := Source_File.Cache_Line;
         Hi := Source_File.Nbr_Lines;

         --  Maybe adjust the threshold.
         --  Quick look.
         if Pos - Source_File.Cache_Pos <= 120
           and then Low + Line_Threshold <= Hi
         then
            for I in 1 .. Line_Threshold loop
               Line_P := Source_File.Lines_Table (Low + I);
               if Line_P > Pos and Line_P /= Source_Ptr_Bad then
                  Line := Low + I - 1;
                  goto Found;
               else
                  exit when Line_P = Source_Ptr_Bad;
               end if;
            end loop;
         end if;
      end if;

      Line := Location_To_Line (Source_File, Pos);

      << Found >> null;

      Line_Pos := Source_File.Lines_Table (Line);
      Offset := Natural (Pos - Source_File.Lines_Table (Line));

      --  Update cache.
      Source_File.Cache_Pos := Pos;
      Source_File.Cache_Line := Line;
   end Location_To_Coord;

   procedure Location_To_Position (Location : Location_Type;
                                   Name : out Name_Id;
                                   Line : out Natural;
                                   Col : out Natural)
   is
      File : Source_File_Entry;
      Line_Pos : Source_Ptr;
      Offset : Natural;
   begin
      Location_To_Coord (Location, File, Line_Pos, Line, Offset);
      Coord_To_Position (File, Line_Pos, Offset, Name, Col);
   end Location_To_Position;

   procedure Location_To_Coord (Location : Location_Type;
                                File : out Source_File_Entry;
                                Line_Pos : out Source_Ptr;
                                Line : out Natural;
                                Offset : out Natural)
   is
      Pos : Source_Ptr;
   begin
      --  Get FILE and position POS in the file.
      Location_To_File_Pos (Location, File, Pos);

      case Source_Files.Table (File).Kind is
         when Source_File_File =>
            Location_To_Coord (Source_Files.Table (File), Pos,
                               Line_Pos, Line, Offset);
         when Source_File_String =>
            Line_Pos := Source_Ptr_Org;
            Line := 1;
            Offset := Natural (Pos - Source_Ptr_Org);
         when Source_File_Instance =>
            declare
               Base : constant Source_File_Entry :=
                 Source_Files.Table (File).Base;
            begin
               Location_To_Coord (Source_Files.Table (Base), Pos,
                                  Line_Pos, Line, Offset);
            end;
      end case;
   end Location_To_Coord;

   -- Convert the first digit of VAL into a character (base 10).
   function Digit_To_Char (Val: Natural) return Character is
   begin
      return Character'Val (Character'Pos ('0') + Val mod 10);
   end Digit_To_Char;

   function Get_Os_Time_Stamp return Time_Stamp_Id
   is
      use Ada.Calendar;
      use Ada.Calendar.Time_Zones;
      use Str_Table;

      Now : constant Time := Clock;
      Now_UTC : constant Time := Now - Duration (UTC_Time_Offset (Now) * 60);
      Year : Year_Number;
      Month : Month_Number;
      Day : Day_Number;
      Sec : Day_Duration;
      S : Integer;
      S1 : Integer;
      M : Integer;
      Res: Time_Stamp_Id;
   begin
      --  Use UTC time (like file time stamp).
      Split (Now_UTC, Year, Month, Day, Sec);

      Res := Time_Stamp_Id (Create_String8);
      Append_String8_Char (Digit_To_Char (Year / 1000));
      Append_String8_Char (Digit_To_Char (Year / 100));
      Append_String8_Char (Digit_To_Char (Year / 10));
      Append_String8_Char (Digit_To_Char (Year / 1));
      Append_String8_Char (Digit_To_Char (Month / 10));
      Append_String8_Char (Digit_To_Char (Month / 1));
      Append_String8_Char (Digit_To_Char (Day / 10));
      Append_String8_Char (Digit_To_Char (Day / 1));
      S := Integer (Sec);
      if Day_Duration (S) > Sec then
         --  We need a truncation.
         S := S - 1;
      end if;
      S1 := S / 3600;
      Append_String8_Char (Digit_To_Char (S1 / 10));
      Append_String8_Char (Digit_To_Char (S1));
      S1 := (S / 60) mod 60;
      Append_String8_Char (Digit_To_Char (S1 / 10));
      Append_String8_Char (Digit_To_Char (S1));
      S1 := S mod 60;
      Append_String8_Char (Digit_To_Char (S1 / 10));
      Append_String8_Char (Digit_To_Char (S1));

      Append_String8_Char ('.');
      Sec := Sec - Day_Duration (S);
      M := Integer (Sec * 1000);
      if M = 1000 then
         --  We need truncation.
         M := 999;
      end if;
      Append_String8_Char (Digit_To_Char (M / 100));
      Append_String8_Char (Digit_To_Char (M / 10));
      Append_String8_Char (Digit_To_Char (M));
      return Res;
   end Get_Os_Time_Stamp;

   function Get_Pathname
     (Directory : Name_Id; Name : Name_Id; Add_Nul : Boolean) return String
   is
      L : Natural;
   begin
      Image (Name);
      if not GNAT.OS_Lib.Is_Absolute_Path (Nam_Buffer (1 .. Nam_Length)) then
         L := Nam_Length;
         Image (Directory);
         Nam_Buffer (Nam_Length + 1 .. Nam_Length + L) := Image (Name);
         Nam_Length := Nam_Length + L;
      end if;
      if Add_Nul then
         Nam_Length := Nam_Length + 1;
         Nam_Buffer (Nam_Length) := Character'Val (0);
      end if;
      return Nam_Buffer (1 .. Nam_Length);
   end Get_Pathname;

   procedure Normalize_Pathname
     (Directory : in out Name_Id; Name : in out Name_Id)
   is
      Separator_Pos : Natural;
      Filename : constant String := Image (Name);
   begin
      --  Find a directory part in NAME, return now if none.
      Separator_Pos := 0;
      for I in Filename'Range loop
         if Filename (I) = '/' or Filename (I) = '\' then
            Separator_Pos := I;
         end if;
      end loop;
      if Separator_Pos = 0 then
         return;
      end if;

      --  Move the directory part to DIRECTORY.
      if Directory /= Null_Identifier then
         Image (Directory);
      else
         Nam_Length := 0;
      end if;
      for I in Filename'First .. Separator_Pos loop
         Nam_Length := Nam_Length + 1;
         Nam_Buffer (Nam_Length) := Filename (I);
      end loop;
      Directory := Get_Identifier;
      Name := Get_Identifier (Filename (Separator_Pos + 1 .. Filename'Last));
   end Normalize_Pathname;

   --  Find a source_file by DIRECTORY and NAME.
   --  Return NO_SOURCE_FILE_ENTRY if not already opened.
   function Find_Source_File (Directory : Name_Id; Name: Name_Id)
     return Source_File_Entry
   is
   begin
      for I in Source_Files.First .. Source_Files.Last loop
         if Source_Files.Table (I).File_Name = Name
           and then Source_Files.Table (I).Directory = Directory
         then
            return I;
         end if;
      end loop;
      return No_Source_File_Entry;
   end Find_Source_File;

   --  Return an entry for a filename.
   --  The file is not loaded.
   function Create_Source_File_Entry (Directory : Name_Id; Name: Name_Id)
     return Source_File_Entry
   is
      Res: Source_File_Entry;
   begin
      --  File must not already exist.
      pragma Assert
        (Find_Source_File (Directory, Name) = No_Source_File_Entry);

      --  Create a new entry.
      Res := Source_Files.Allocate;
      Source_Files.Table (Res) := (Kind => Source_File_File,
                                   First_Location => Next_Location,
                                   Last_Location => Next_Location,
                                   File_Name => Name,
                                   Directory => Directory,
                                   Checksum => No_File_Checksum_Id,
                                   Source => null,
                                   File_Length => 0,
                                   Nbr_Lines => 0,
                                   Lines_Table_Max => 0,
                                   Lines_Table => null,
                                   Cache_Pos => Source_Ptr_Org,
                                   Cache_Line => 1);
      File_Add_Line_Number (Res, 1, Source_Ptr_Org);
      return Res;
   end Create_Source_File_Entry;

   function Create_Source_File_From_String (Name: Name_Id; Content : String)
                                           return Source_File_Entry
   is
      Len : constant Source_Ptr := Source_Ptr (Content'Length);
      Res : Source_File_Entry;
      Buffer: File_Buffer_Acc;
   begin
      --  Fill buffer.
      Buffer := new File_Buffer
        (Source_Ptr_Org .. Source_Ptr_Org + Len + 1);

      if Len /= 0 then
         Buffer (Source_Ptr_Org .. Source_Ptr_Org + Len - 1) :=
           File_Buffer (Content);
      end if;
      Buffer (Source_Ptr_Org + Len) := EOT;
      Buffer (Source_Ptr_Org + Len + 1) := EOT;

      --  Create entry.
      Res := Source_Files.Allocate;
      Source_Files.Table (Res) :=
        (Kind => Source_File_String,
         First_Location => Next_Location,
         Last_Location => Next_Location + Location_Type (Len) + 1,
         File_Name => Name,
         Directory => Null_Identifier,
         Checksum => No_File_Checksum_Id,
         Source => Buffer,
         File_Length => Natural (Len));

      Next_Location := Source_Files.Table (Res).Last_Location + 1;

      return Res;
   end Create_Source_File_From_String;

   function Create_Virtual_Source_File (Name: Name_Id)
                                       return Source_File_Entry is
   begin
      return Create_Source_File_From_String (Name, "");
   end Create_Virtual_Source_File;

   function Create_Instance_Source_File
     (Ref : Source_File_Entry; Loc : Location_Type; Inst : Nodes.Node_Type)
     return Source_File_Entry
   is
      pragma Unreferenced (Inst);
      Base : Source_File_Entry;
      Res : Source_File_Entry;
   begin
      if Source_Files.Table (Ref).Kind = Source_File_Instance then
         Base := Source_Files.Table (Ref).Base;
      else
         Base := Ref;
      end if;

      --  Create entry.
      Res := Source_Files.Allocate;

      declare
         F : Source_File_Record renames Source_Files.Table (Base);
      begin
         Source_Files.Table (Res) :=
           (Kind => Source_File_Instance,
            First_Location => Next_Location,
            Last_Location => Next_Location + Location_Type (F.File_Length) + 1,
            File_Name => F.File_Name,
            Directory => F.Directory,
            Checksum => F.Checksum,
            Source => F.Source,
            File_Length => F.File_Length,
            Ref => Ref,
            Base => Base,
            Instance_Loc => Loc);

         Next_Location := Source_Files.Table (Res).Last_Location + 1;
      end;

      return Res;
   end Create_Instance_Source_File;

   function Instance_Relocate
     (Inst_File : Source_File_Entry; Loc : Location_Type)
     return Location_Type
   is
      pragma Assert (Inst_File <= Source_Files.Last);
      F : Source_File_Record renames Source_Files.Table (Inst_File);
      pragma Assert (F.Kind = Source_File_Instance);
      R : Source_File_Record renames Source_Files.Table (F.Ref);
   begin
      if Loc >= R.First_Location and Loc <= R.Last_Location then
         return F.First_Location + (Loc - R.First_Location);
      else
         return Loc;
      end if;
   end Instance_Relocate;

   function Location_Instance_To_Location
     (Loc : Location_Type) return Location_Type
   is
      File : Source_File_Entry;
      Pos :  Source_Ptr;
   begin
      if Loc = No_Location then
         return No_Location;
      end if;

      Location_To_File_Pos (Loc, File, Pos);
      if Source_Files.Table (File).Kind = Source_File_Instance then
         return Source_Files.Table (File).Instance_Loc;
      else
         return No_Location;
      end if;
   end Location_Instance_To_Location;

   --  Return an entry for a filename.
   --  Load the filename if necessary.
   function Load_Source_File (Directory : Name_Id; Name: Name_Id)
                              return Source_File_Entry
   is
      use GNAT.OS_Lib;
      Fd : File_Descriptor;

      Res: Source_File_Entry;

      Length: Source_Ptr;
      Buffer: File_Buffer_Acc;
   begin
      --  If the file is already loaded, nothing to do!
      Res := Find_Source_File (Directory, Name);
      if Res /= No_Source_File_Entry then
         pragma Assert (Source_Files.Table (Res).Source /= null);
         return Res;
      end if;

      --  Open the file (punt on non regular files).
      declare
         Filename : String := Get_Pathname (Directory, Name, True);
      begin
         if not Is_Regular_File (Filename) then
            return No_Source_File_Entry;
         end if;
         Fd := Open_Read (Filename'Address, Binary);
         if Fd = Invalid_FD then
            return No_Source_File_Entry;
         end if;
      end;

      Res := Create_Source_File_Entry (Directory, Name);

      Length := Source_Ptr (File_Length (Fd));

      Buffer :=
        new File_Buffer (Source_Ptr_Org .. Source_Ptr_Org + Length + 1);

      if Read (Fd, Buffer (Source_Ptr_Org)'Address, Integer (Length))
        /= Integer (Length)
      then
         Close (Fd);
         raise Internal_Error;
      end if;
      Buffer (Source_Ptr_Org + Length) := EOT;
      Buffer (Source_Ptr_Org + Length + 1) := EOT;
      Close (Fd);

      --  Load_Source_File call must follow its Create_Source_File.
      pragma Assert (Source_Files.Table (Res).First_Location = Next_Location);

      declare
         use GNAT.SHA1;
         use Str_Table;

         subtype Buffer_String is String (1 .. Buffer'Length - 2);
         Buffer_Digest : constant Message_Digest :=
           Digest (Buffer_String
                     (Buffer (Source_Ptr_Org .. Source_Ptr_Org + Length - 1)));
      begin
         Source_Files.Table (Res).Checksum :=
           File_Checksum_Id (Create_String8);
         for I in Buffer_Digest'Range loop
            Append_String8_Char (Buffer_Digest (I));
         end loop;
      end;

      Source_Files.Table (Res).Last_Location :=
        Next_Location + Location_Type (Length) + 1;
      Next_Location := Source_Files.Table (Res).Last_Location + 1;
      Source_Files.Table (Res).Source := Buffer;
      Source_Files.Table (Res).File_Length := Integer (Length);

      return Res;
   end Load_Source_File;

   --  Check validity of FILE.
   --  Raise an exception in case of error.
   procedure Check_File (File: in Source_File_Entry) is
   begin
      pragma Assert (File <= Source_Files.Last);
      null;
   end Check_File;

   --  Return a buffer (access to the contents of the file) for a file entry.
   function Get_File_Source (File: Source_File_Entry)
                             return File_Buffer_Acc is
   begin
      Check_File (File);
      return Source_Files.Table (File).Source;
   end Get_File_Source;

   --  Return the length of the file (which is the size of the file buffer).
   function Get_File_Length (File: Source_File_Entry) return Source_Ptr is
   begin
      Check_File (File);
      return Source_Ptr (Source_Files.Table (File).File_Length);
   end Get_File_Length;

   --  Return the name of the file.
   function Get_File_Name (File: Source_File_Entry) return Name_Id is
   begin
      Check_File (File);
      return Source_Files.Table (File).File_Name;
   end Get_File_Name;

   function Get_File_Checksum (File : Source_File_Entry)
                              return File_Checksum_Id is
   begin
      Check_File (File);
      return Source_Files.Table (File).Checksum;
   end Get_File_Checksum;

   function Get_Source_File_Directory (File : Source_File_Entry)
                                       return Name_Id is
   begin
      Check_File (File);
      return Source_Files.Table (File).Directory;
   end Get_Source_File_Directory;

   function Line_To_Position (File : Source_File_Entry; Line : Natural)
                             return Source_Ptr
   is
      pragma Assert (File <= Source_Files.Last);
      Source_File: Source_File_Record renames Source_Files.Table (File);
   begin
      case Source_File.Kind is
         when Source_File_File =>
            if Line > Source_File.Nbr_Lines then
               return Source_Ptr_Bad;
            else
               return Source_File.Lines_Table (Line);
            end if;
         when Source_File_String =>
            if Line /= 1 then
               return Source_Ptr_Bad;
            else
               return Source_Ptr_Org;
            end if;
         when Source_File_Instance =>
            return Line_To_Position (Source_File.Base, Line);
      end case;
   end Line_To_Position;

   function Is_Eq (L : Time_Stamp_Id; R : Time_Stamp_Id) return Boolean
   is
      use Str_Table;
      L_Str : constant String8_Id := String8_Id (L);
      R_Str : constant String8_Id := String8_Id (R);
   begin
      for I in 1 .. Nat32 (Time_Stamp_String'Length) loop
         if Element_String8 (L_Str, I) /= Element_String8 (R_Str, I) then
            return False;
         end if;
      end loop;
      return True;
   end Is_Eq;

   function Is_Eq (L, R : File_Checksum_Id) return Boolean
   is
      use Str_Table;
      L_Str : constant String8_Id := String8_Id (L);
      R_Str : constant String8_Id := String8_Id (R);
   begin
      for I in 1 .. Nat32 (File_Checksum_String'Length) loop
         if Element_String8 (L_Str, I) /= Element_String8 (R_Str, I) then
            return False;
         end if;
      end loop;
      return True;
   end Is_Eq;

   function Is_Gt (L : Time_Stamp_Id; R : Time_Stamp_Id) return Boolean
   is
      use Str_Table;
      L_Str : constant String8_Id := String8_Id (L);
      R_Str : constant String8_Id := String8_Id (R);
      E_L, E_R : Nat8;
   begin
      for I in 1 .. Nat32 (Time_Stamp_String'Length) loop
         E_L := Element_String8 (L_Str, I);
         E_R := Element_String8 (R_Str, I);
         if E_L /= E_R then
            return E_L > E_R;
         end if;
      end loop;
      return False;
   end Is_Gt;

   function Get_Time_Stamp_String (Ts : Time_Stamp_Id) return String is
   begin
      if Ts = Null_Time_Stamp then
         return "NULL_TS";
      else
         return Str_Table.String_String8
           (String8_Id (Ts), Time_Stamp_String'Length);
      end if;
   end Get_Time_Stamp_String;

   function Get_File_Checksum_String (Checksum : File_Checksum_Id)
                                     return String is
   begin
      if Checksum = No_File_Checksum_Id then
         return "NO_CHECKSUM";
      else
         return Str_Table.String_String8
           (String8_Id (Checksum), File_Checksum_String'Length);
      end if;
   end Get_File_Checksum_String;

   function Image (Loc : Location_Type; Filename : Boolean := True)
                  return string
   is
      Line, Col : Natural;
      Name : Name_Id;
   begin
      if Loc = Location_Nil then
         --  Avoid a crash.
         return "??:??:??";
      end if;


context:
space:
mode: