1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 -- WARNING: There is a C version of this package. Any changes to this
35 -- source file must be properly reflected in the C header file a-namet.h
36 -- which is created manually from namet.ads and namet.adb.
38 with Debug; use Debug;
40 with Output; use Output;
41 with Tree_IO; use Tree_IO;
42 with Widechar; use Widechar;
46 Name_Chars_Reserve : constant := 5000;
47 Name_Entries_Reserve : constant := 100;
48 -- The names table is locked during gigi processing, since gigi assumes
49 -- that the table does not move. After returning from gigi, the names
50 -- table is unlocked again, since writing library file information needs
51 -- to generate some extra names. To avoid the inefficiency of always
52 -- reallocating during this second unlocked phase, we reserve a bit of
53 -- extra space before doing the release call.
55 Hash_Num : constant Int := 2**12;
56 -- Number of headers in the hash table. Current hash algorithm is closely
57 -- tailored to this choice, so it can only be changed if a corresponding
58 -- change is made to the hash alogorithm.
60 Hash_Max : constant Int := Hash_Num - 1;
61 -- Indexes in the hash header table run from 0 to Hash_Num - 1
63 subtype Hash_Index_Type is Int range 0 .. Hash_Max;
64 -- Range of hash index values
66 Hash_Table : array (Hash_Index_Type) of Name_Id;
67 -- The hash table is used to locate existing entries in the names table.
68 -- The entries point to the first names table entry whose hash value
69 -- matches the hash code. Then subsequent names table entries with the
70 -- same hash code value are linked through the Hash_Link fields.
72 -----------------------
73 -- Local Subprograms --
74 -----------------------
76 function Hash return Hash_Index_Type;
78 -- Compute hash code for name stored in Name_Buffer (length in Name_Len)
80 procedure Strip_Qualification_And_Suffixes;
81 -- Given an encoded entity name in Name_Buffer, remove package body
82 -- suffix as described for Strip_Package_Body_Suffix, and also remove
83 -- all qualification, i.e. names followed by two underscores. The
84 -- contents of Name_Buffer is modified by this call, and on return
85 -- Name_Buffer and Name_Len reflect the stripped name.
87 -----------------------------
88 -- Add_Char_To_Name_Buffer --
89 -----------------------------
91 procedure Add_Char_To_Name_Buffer (C : Character) is
93 if Name_Len < Name_Buffer'Last then
94 Name_Len := Name_Len + 1;
95 Name_Buffer (Name_Len) := C;
97 end Add_Char_To_Name_Buffer;
99 ----------------------------
100 -- Add_Nat_To_Name_Buffer --
101 ----------------------------
103 procedure Add_Nat_To_Name_Buffer (V : Nat) is
106 Add_Nat_To_Name_Buffer (V / 10);
109 Add_Char_To_Name_Buffer (Character'Val (Character'Pos ('0') + V rem 10));
110 end Add_Nat_To_Name_Buffer;
112 ----------------------------
113 -- Add_Str_To_Name_Buffer --
114 ----------------------------
116 procedure Add_Str_To_Name_Buffer (S : String) is
118 for J in S'Range loop
119 Add_Char_To_Name_Buffer (S (J));
121 end Add_Str_To_Name_Buffer;
128 procedure Finalize is
129 Max_Chain_Length : constant := 50;
130 -- Max length of chains for which specific information is output
132 F : array (Int range 0 .. Max_Chain_Length) of Int;
133 -- N'th entry is number of chains of length N
136 -- Used to compute average number of probes
139 -- Number of symbols in table
143 for J in F'Range loop
147 for J in Hash_Index_Type loop
148 if Hash_Table (J) = No_Name then
152 Write_Str ("Hash_Table (");
154 Write_Str (") has ");
165 while N /= No_Name loop
166 N := Name_Entries.Table (N).Hash_Link;
171 Write_Str (" entries");
174 if C < Max_Chain_Length then
177 F (Max_Chain_Length) := F (Max_Chain_Length) + 1;
182 while N /= No_Name loop
183 S := Name_Entries.Table (N).Name_Chars_Index;
186 for J in 1 .. Name_Entries.Table (N).Name_Len loop
187 Write_Char (Name_Chars.Table (S + Int (J)));
191 N := Name_Entries.Table (N).Hash_Link;
199 for J in Int range 0 .. Max_Chain_Length loop
201 Write_Str ("Number of hash chains of length ");
209 if J = Max_Chain_Length then
210 Write_Str (" or greater");
218 Nsyms := Nsyms + F (J);
219 Probes := Probes + F (J) * (1 + J) * 100;
225 Write_Str ("Average number of probes for lookup = ");
226 Probes := Probes / Nsyms;
227 Write_Int (Probes / 200);
229 Probes := (Probes mod 200) / 2;
230 Write_Char (Character'Val (48 + Probes / 10));
231 Write_Char (Character'Val (48 + Probes mod 10));
237 -----------------------------
238 -- Get_Decoded_Name_String --
239 -----------------------------
241 procedure Get_Decoded_Name_String (Id : Name_Id) is
246 Get_Name_String (Id);
248 -- Quick loop to see if there is anything special to do
256 C := Name_Buffer (P);
268 -- Here we have at least some encoding that we must decode
273 New_Buf : String (1 .. Name_Buffer'Last);
275 procedure Copy_One_Character;
276 -- Copy a character from Name_Buffer to New_Buf. Includes case
277 -- of copying a Uhh,Whhhh,WWhhhhhhhh sequence and decoding it.
279 function Hex (N : Natural) return Word;
280 -- Scans past N digits using Old pointer and returns hex value
282 procedure Insert_Character (C : Character);
283 -- Insert a new character into output decoded name
285 ------------------------
286 -- Copy_One_Character --
287 ------------------------
289 procedure Copy_One_Character is
293 C := Name_Buffer (Old);
295 -- U (upper half insertion case)
298 and then Old < Name_Len
299 and then Name_Buffer (Old + 1) not in 'A' .. 'Z'
300 and then Name_Buffer (Old + 1) /= '_'
304 -- If we have upper half encoding, then we have to set an
305 -- appropriate wide character sequence for this character.
307 if Upper_Half_Encoding then
308 Widechar.Set_Wide (Char_Code (Hex (2)), New_Buf, New_Len);
310 -- For other encoding methods, upper half characters can
311 -- simply use their normal representation.
314 Insert_Character (Character'Val (Hex (2)));
318 -- WW (wide wide character insertion)
321 and then Old < Name_Len
322 and then Name_Buffer (Old + 1) = 'W'
325 Widechar.Set_Wide (Char_Code (Hex (8)), New_Buf, New_Len);
327 -- W (wide character insertion)
330 and then Old < Name_Len
331 and then Name_Buffer (Old + 1) not in 'A' .. 'Z'
332 and then Name_Buffer (Old + 1) /= '_'
335 Widechar.Set_Wide (Char_Code (Hex (4)), New_Buf, New_Len);
337 -- Any other character is copied unchanged
340 Insert_Character (C);
343 end Copy_One_Character;
349 function Hex (N : Natural) return Word is
355 C := Name_Buffer (Old);
358 pragma Assert (C in '0' .. '9' or else C in 'a' .. 'f');
361 T := 16 * T + Character'Pos (C) - Character'Pos ('0');
362 else -- C in 'a' .. 'f'
363 T := 16 * T + Character'Pos (C) - (Character'Pos ('a') - 10);
370 ----------------------
371 -- Insert_Character --
372 ----------------------
374 procedure Insert_Character (C : Character) is
376 New_Len := New_Len + 1;
377 New_Buf (New_Len) := C;
378 end Insert_Character;
380 -- Start of processing for Decode
386 -- Loop through characters of name
388 while Old <= Name_Len loop
390 -- Case of character literal, put apostrophes around character
392 if Name_Buffer (Old) = 'Q'
393 and then Old < Name_Len
396 Insert_Character (''');
398 Insert_Character (''');
400 -- Case of operator name
402 elsif Name_Buffer (Old) = 'O'
403 and then Old < Name_Len
404 and then Name_Buffer (Old + 1) not in 'A' .. 'Z'
405 and then Name_Buffer (Old + 1) /= '_'
410 -- This table maps the 2nd and 3rd characters of the name
411 -- into the required output. Two blanks means leave the
414 Map : constant String :=
415 "ab " & -- Oabs => "abs"
416 "ad+ " & -- Oadd => "+"
417 "an " & -- Oand => "and"
418 "co& " & -- Oconcat => "&"
419 "di/ " & -- Odivide => "/"
420 "eq= " & -- Oeq => "="
421 "ex**" & -- Oexpon => "**"
422 "gt> " & -- Ogt => ">"
423 "ge>=" & -- Oge => ">="
424 "le<=" & -- Ole => "<="
425 "lt< " & -- Olt => "<"
426 "mo " & -- Omod => "mod"
427 "mu* " & -- Omutliply => "*"
428 "ne/=" & -- One => "/="
429 "no " & -- Onot => "not"
430 "or " & -- Oor => "or"
431 "re " & -- Orem => "rem"
432 "su- " & -- Osubtract => "-"
433 "xo "; -- Oxor => "xor"
438 Insert_Character ('"');
440 -- Search the map. Note that this loop must terminate, if
441 -- not we have some kind of internal error, and a constraint
442 -- constraint error may be raised.
446 exit when Name_Buffer (Old) = Map (J)
447 and then Name_Buffer (Old + 1) = Map (J + 1);
451 -- Special operator name
453 if Map (J + 2) /= ' ' then
454 Insert_Character (Map (J + 2));
456 if Map (J + 3) /= ' ' then
457 Insert_Character (Map (J + 3));
460 Insert_Character ('"');
462 -- Skip past original operator name in input
464 while Old <= Name_Len
465 and then Name_Buffer (Old) in 'a' .. 'z'
470 -- For other operator names, leave them in lower case,
471 -- surrounded by apostrophes
474 -- Copy original operator name from input to output
476 while Old <= Name_Len
477 and then Name_Buffer (Old) in 'a' .. 'z'
482 Insert_Character ('"');
486 -- Else copy one character and keep going
493 -- Copy new buffer as result
496 Name_Buffer (1 .. New_Len) := New_Buf (1 .. New_Len);
498 end Get_Decoded_Name_String;
500 -------------------------------------------
501 -- Get_Decoded_Name_String_With_Brackets --
502 -------------------------------------------
504 procedure Get_Decoded_Name_String_With_Brackets (Id : Name_Id) is
508 -- Case of operator name, normal decoding is fine
510 if Name_Buffer (1) = 'O' then
511 Get_Decoded_Name_String (Id);
513 -- For character literals, normal decoding is fine
515 elsif Name_Buffer (1) = 'Q' then
516 Get_Decoded_Name_String (Id);
518 -- Only remaining issue is U/W/WW sequences
521 Get_Name_String (Id);
524 while P < Name_Len loop
525 if Name_Buffer (P + 1) in 'A' .. 'Z' then
530 elsif Name_Buffer (P) = 'U' then
531 for J in reverse P + 3 .. P + Name_Len loop
532 Name_Buffer (J + 3) := Name_Buffer (J);
535 Name_Len := Name_Len + 3;
536 Name_Buffer (P + 3) := Name_Buffer (P + 2);
537 Name_Buffer (P + 2) := Name_Buffer (P + 1);
538 Name_Buffer (P) := '[';
539 Name_Buffer (P + 1) := '"';
540 Name_Buffer (P + 4) := '"';
541 Name_Buffer (P + 5) := ']';
544 -- WWhhhhhhhh encoding
546 elsif Name_Buffer (P) = 'W'
547 and then P + 9 <= Name_Len
548 and then Name_Buffer (P + 1) = 'W'
549 and then Name_Buffer (P + 2) not in 'A' .. 'Z'
550 and then Name_Buffer (P + 2) /= '_'
552 Name_Buffer (P + 12 .. Name_Len + 2) :=
553 Name_Buffer (P + 10 .. Name_Len);
554 Name_Buffer (P) := '[';
555 Name_Buffer (P + 1) := '"';
556 Name_Buffer (P + 10) := '"';
557 Name_Buffer (P + 11) := ']';
558 Name_Len := Name_Len + 2;
563 elsif Name_Buffer (P) = 'W'
564 and then P < Name_Len
565 and then Name_Buffer (P + 1) not in 'A' .. 'Z'
566 and then Name_Buffer (P + 1) /= '_'
568 Name_Buffer (P + 8 .. P + Name_Len + 3) :=
569 Name_Buffer (P + 5 .. Name_Len);
570 Name_Buffer (P + 2 .. P + 5) := Name_Buffer (P + 1 .. P + 4);
571 Name_Buffer (P) := '[';
572 Name_Buffer (P + 1) := '"';
573 Name_Buffer (P + 6) := '"';
574 Name_Buffer (P + 7) := ']';
575 Name_Len := Name_Len + 3;
583 end Get_Decoded_Name_String_With_Brackets;
585 ------------------------
586 -- Get_Last_Two_Chars --
587 ------------------------
589 procedure Get_Last_Two_Chars (N : Name_Id; C1, C2 : out Character) is
590 NE : Name_Entry renames Name_Entries.Table (N);
591 NEL : constant Int := Int (NE.Name_Len);
595 C1 := Name_Chars.Table (NE.Name_Chars_Index + NEL - 1);
596 C2 := Name_Chars.Table (NE.Name_Chars_Index + NEL - 0);
601 end Get_Last_Two_Chars;
603 ---------------------
604 -- Get_Name_String --
605 ---------------------
607 -- Procedure version leaving result in Name_Buffer, length in Name_Len
609 procedure Get_Name_String (Id : Name_Id) is
613 pragma Assert (Id in Name_Entries.First .. Name_Entries.Last);
615 S := Name_Entries.Table (Id).Name_Chars_Index;
616 Name_Len := Natural (Name_Entries.Table (Id).Name_Len);
618 for J in 1 .. Name_Len loop
619 Name_Buffer (J) := Name_Chars.Table (S + Int (J));
623 ---------------------
624 -- Get_Name_String --
625 ---------------------
627 -- Function version returning a string
629 function Get_Name_String (Id : Name_Id) return String is
633 pragma Assert (Id in Name_Entries.First .. Name_Entries.Last);
634 S := Name_Entries.Table (Id).Name_Chars_Index;
637 R : String (1 .. Natural (Name_Entries.Table (Id).Name_Len));
640 for J in R'Range loop
641 R (J) := Name_Chars.Table (S + Int (J));
648 --------------------------------
649 -- Get_Name_String_And_Append --
650 --------------------------------
652 procedure Get_Name_String_And_Append (Id : Name_Id) is
656 pragma Assert (Id in Name_Entries.First .. Name_Entries.Last);
658 S := Name_Entries.Table (Id).Name_Chars_Index;
660 for J in 1 .. Natural (Name_Entries.Table (Id).Name_Len) loop
661 Name_Len := Name_Len + 1;
662 Name_Buffer (Name_Len) := Name_Chars.Table (S + Int (J));
664 end Get_Name_String_And_Append;
666 -------------------------
667 -- Get_Name_Table_Byte --
668 -------------------------
670 function Get_Name_Table_Byte (Id : Name_Id) return Byte is
672 pragma Assert (Id in Name_Entries.First .. Name_Entries.Last);
673 return Name_Entries.Table (Id).Byte_Info;
674 end Get_Name_Table_Byte;
676 -------------------------
677 -- Get_Name_Table_Info --
678 -------------------------
680 function Get_Name_Table_Info (Id : Name_Id) return Int is
682 pragma Assert (Id in Name_Entries.First .. Name_Entries.Last);
683 return Name_Entries.Table (Id).Int_Info;
684 end Get_Name_Table_Info;
686 -----------------------------------------
687 -- Get_Unqualified_Decoded_Name_String --
688 -----------------------------------------
690 procedure Get_Unqualified_Decoded_Name_String (Id : Name_Id) is
692 Get_Decoded_Name_String (Id);
693 Strip_Qualification_And_Suffixes;
694 end Get_Unqualified_Decoded_Name_String;
696 ---------------------------------
697 -- Get_Unqualified_Name_String --
698 ---------------------------------
700 procedure Get_Unqualified_Name_String (Id : Name_Id) is
702 Get_Name_String (Id);
703 Strip_Qualification_And_Suffixes;
704 end Get_Unqualified_Name_String;
710 function Hash return Hash_Index_Type is
712 -- For the cases of 1-12 characters, all characters participate in the
713 -- hash. The positioning is randomized, with the bias that characters
714 -- later on participate fully (i.e. are added towards the right side).
723 Character'Pos (Name_Buffer (1));
727 Character'Pos (Name_Buffer (1))) * 64 +
728 Character'Pos (Name_Buffer (2))) mod Hash_Num;
732 Character'Pos (Name_Buffer (1))) * 16 +
733 Character'Pos (Name_Buffer (3))) * 16 +
734 Character'Pos (Name_Buffer (2))) mod Hash_Num;
738 Character'Pos (Name_Buffer (1))) * 8 +
739 Character'Pos (Name_Buffer (2))) * 8 +
740 Character'Pos (Name_Buffer (3))) * 8 +
741 Character'Pos (Name_Buffer (4))) mod Hash_Num;
745 Character'Pos (Name_Buffer (4))) * 8 +
746 Character'Pos (Name_Buffer (1))) * 4 +
747 Character'Pos (Name_Buffer (3))) * 4 +
748 Character'Pos (Name_Buffer (5))) * 8 +
749 Character'Pos (Name_Buffer (2))) mod Hash_Num;
753 Character'Pos (Name_Buffer (5))) * 4 +
754 Character'Pos (Name_Buffer (1))) * 4 +
755 Character'Pos (Name_Buffer (4))) * 4 +
756 Character'Pos (Name_Buffer (2))) * 4 +
757 Character'Pos (Name_Buffer (6))) * 4 +
758 Character'Pos (Name_Buffer (3))) mod Hash_Num;
762 Character'Pos (Name_Buffer (4))) * 4 +
763 Character'Pos (Name_Buffer (3))) * 4 +
764 Character'Pos (Name_Buffer (1))) * 4 +
765 Character'Pos (Name_Buffer (2))) * 2 +
766 Character'Pos (Name_Buffer (5))) * 2 +
767 Character'Pos (Name_Buffer (7))) * 2 +
768 Character'Pos (Name_Buffer (6))) mod Hash_Num;
772 Character'Pos (Name_Buffer (2))) * 4 +
773 Character'Pos (Name_Buffer (1))) * 4 +
774 Character'Pos (Name_Buffer (3))) * 2 +
775 Character'Pos (Name_Buffer (5))) * 2 +
776 Character'Pos (Name_Buffer (7))) * 2 +
777 Character'Pos (Name_Buffer (6))) * 2 +
778 Character'Pos (Name_Buffer (4))) * 2 +
779 Character'Pos (Name_Buffer (8))) mod Hash_Num;
783 Character'Pos (Name_Buffer (2))) * 4 +
784 Character'Pos (Name_Buffer (1))) * 4 +
785 Character'Pos (Name_Buffer (3))) * 4 +
786 Character'Pos (Name_Buffer (4))) * 2 +
787 Character'Pos (Name_Buffer (8))) * 2 +
788 Character'Pos (Name_Buffer (7))) * 2 +
789 Character'Pos (Name_Buffer (5))) * 2 +
790 Character'Pos (Name_Buffer (6))) * 2 +
791 Character'Pos (Name_Buffer (9))) mod Hash_Num;
795 Character'Pos (Name_Buffer (01))) * 2 +
796 Character'Pos (Name_Buffer (02))) * 2 +
797 Character'Pos (Name_Buffer (08))) * 2 +
798 Character'Pos (Name_Buffer (03))) * 2 +
799 Character'Pos (Name_Buffer (04))) * 2 +
800 Character'Pos (Name_Buffer (09))) * 2 +
801 Character'Pos (Name_Buffer (06))) * 2 +
802 Character'Pos (Name_Buffer (05))) * 2 +
803 Character'Pos (Name_Buffer (07))) * 2 +
804 Character'Pos (Name_Buffer (10))) mod Hash_Num;
808 Character'Pos (Name_Buffer (05))) * 2 +
809 Character'Pos (Name_Buffer (01))) * 2 +
810 Character'Pos (Name_Buffer (06))) * 2 +
811 Character'Pos (Name_Buffer (09))) * 2 +
812 Character'Pos (Name_Buffer (07))) * 2 +
813 Character'Pos (Name_Buffer (03))) * 2 +
814 Character'Pos (Name_Buffer (08))) * 2 +
815 Character'Pos (Name_Buffer (02))) * 2 +
816 Character'Pos (Name_Buffer (10))) * 2 +
817 Character'Pos (Name_Buffer (04))) * 2 +
818 Character'Pos (Name_Buffer (11))) mod Hash_Num;
822 Character'Pos (Name_Buffer (03))) * 2 +
823 Character'Pos (Name_Buffer (02))) * 2 +
824 Character'Pos (Name_Buffer (05))) * 2 +
825 Character'Pos (Name_Buffer (01))) * 2 +
826 Character'Pos (Name_Buffer (06))) * 2 +
827 Character'Pos (Name_Buffer (04))) * 2 +
828 Character'Pos (Name_Buffer (08))) * 2 +
829 Character'Pos (Name_Buffer (11))) * 2 +
830 Character'Pos (Name_Buffer (07))) * 2 +
831 Character'Pos (Name_Buffer (09))) * 2 +
832 Character'Pos (Name_Buffer (10))) * 2 +
833 Character'Pos (Name_Buffer (12))) mod Hash_Num;
835 -- Names longer than 12 characters are handled by taking the first
836 -- 6 odd numbered characters and the last 6 even numbered characters.
838 when others => declare
839 Even_Name_Len : constant Integer := (Name_Len) / 2 * 2;
842 Character'Pos (Name_Buffer (01))) * 2 +
843 Character'Pos (Name_Buffer (Even_Name_Len - 10))) * 2 +
844 Character'Pos (Name_Buffer (03))) * 2 +
845 Character'Pos (Name_Buffer (Even_Name_Len - 08))) * 2 +
846 Character'Pos (Name_Buffer (05))) * 2 +
847 Character'Pos (Name_Buffer (Even_Name_Len - 06))) * 2 +
848 Character'Pos (Name_Buffer (07))) * 2 +
849 Character'Pos (Name_Buffer (Even_Name_Len - 04))) * 2 +
850 Character'Pos (Name_Buffer (09))) * 2 +
851 Character'Pos (Name_Buffer (Even_Name_Len - 02))) * 2 +
852 Character'Pos (Name_Buffer (11))) * 2 +
853 Character'Pos (Name_Buffer (Even_Name_Len))) mod Hash_Num;
862 procedure Initialize is
867 -- Initialize entries for one character names
869 for C in Character loop
870 Name_Entries.Increment_Last;
871 Name_Entries.Table (Name_Entries.Last).Name_Chars_Index :=
873 Name_Entries.Table (Name_Entries.Last).Name_Len := 1;
874 Name_Entries.Table (Name_Entries.Last).Hash_Link := No_Name;
875 Name_Entries.Table (Name_Entries.Last).Int_Info := 0;
876 Name_Entries.Table (Name_Entries.Last).Byte_Info := 0;
877 Name_Chars.Increment_Last;
878 Name_Chars.Table (Name_Chars.Last) := C;
879 Name_Chars.Increment_Last;
880 Name_Chars.Table (Name_Chars.Last) := ASCII.NUL;
885 for J in Hash_Index_Type loop
886 Hash_Table (J) := No_Name;
890 ----------------------
891 -- Is_Internal_Name --
892 ----------------------
894 -- Version taking an argument
896 function Is_Internal_Name (Id : Name_Id) return Boolean is
898 Get_Name_String (Id);
899 return Is_Internal_Name;
900 end Is_Internal_Name;
902 ----------------------
903 -- Is_Internal_Name --
904 ----------------------
906 -- Version taking its input from Name_Buffer
908 function Is_Internal_Name return Boolean is
910 if Name_Buffer (1) = '_'
911 or else Name_Buffer (Name_Len) = '_'
916 -- Test backwards, because we only want to test the last entity
917 -- name if the name we have is qualified with other entities.
919 for J in reverse 1 .. Name_Len loop
920 if Is_OK_Internal_Letter (Name_Buffer (J)) then
923 -- Quit if we come to terminating double underscore (note that
924 -- if the current character is an underscore, we know that
925 -- there is a previous character present, since we already
926 -- filtered out the case of Name_Buffer (1) = '_' above.
928 elsif Name_Buffer (J) = '_'
929 and then Name_Buffer (J - 1) = '_'
930 and then Name_Buffer (J - 2) /= '_'
938 end Is_Internal_Name;
940 ---------------------------
941 -- Is_OK_Internal_Letter --
942 ---------------------------
944 function Is_OK_Internal_Letter (C : Character) return Boolean is
946 return C in 'A' .. 'Z'
952 end Is_OK_Internal_Letter;
954 ----------------------
955 -- Is_Operator_Name --
956 ----------------------
958 function Is_Operator_Name (Id : Name_Id) return Boolean is
961 pragma Assert (Id in Name_Entries.First .. Name_Entries.Last);
962 S := Name_Entries.Table (Id).Name_Chars_Index;
963 return Name_Chars.Table (S + 1) = 'O';
964 end Is_Operator_Name;
970 function Length_Of_Name (Id : Name_Id) return Nat is
972 return Int (Name_Entries.Table (Id).Name_Len);
981 Name_Chars.Set_Last (Name_Chars.Last + Name_Chars_Reserve);
982 Name_Entries.Set_Last (Name_Entries.Last + Name_Entries_Reserve);
983 Name_Chars.Locked := True;
984 Name_Entries.Locked := True;
986 Name_Entries.Release;
989 ------------------------
990 -- Name_Chars_Address --
991 ------------------------
993 function Name_Chars_Address return System.Address is
995 return Name_Chars.Table (0)'Address;
996 end Name_Chars_Address;
1002 function Name_Enter return Name_Id is
1004 Name_Entries.Increment_Last;
1005 Name_Entries.Table (Name_Entries.Last).Name_Chars_Index :=
1007 Name_Entries.Table (Name_Entries.Last).Name_Len := Short (Name_Len);
1008 Name_Entries.Table (Name_Entries.Last).Hash_Link := No_Name;
1009 Name_Entries.Table (Name_Entries.Last).Int_Info := 0;
1010 Name_Entries.Table (Name_Entries.Last).Byte_Info := 0;
1012 -- Set corresponding string entry in the Name_Chars table
1014 for J in 1 .. Name_Len loop
1015 Name_Chars.Increment_Last;
1016 Name_Chars.Table (Name_Chars.Last) := Name_Buffer (J);
1019 Name_Chars.Increment_Last;
1020 Name_Chars.Table (Name_Chars.Last) := ASCII.NUL;
1022 return Name_Entries.Last;
1025 --------------------------
1026 -- Name_Entries_Address --
1027 --------------------------
1029 function Name_Entries_Address return System.Address is
1031 return Name_Entries.Table (First_Name_Id)'Address;
1032 end Name_Entries_Address;
1034 ------------------------
1035 -- Name_Entries_Count --
1036 ------------------------
1038 function Name_Entries_Count return Nat is
1040 return Int (Name_Entries.Last - Name_Entries.First + 1);
1041 end Name_Entries_Count;
1047 function Name_Find return Name_Id is
1049 -- Id of entry in hash search, and value to be returned
1052 -- Pointer into string table
1054 Hash_Index : Hash_Index_Type;
1055 -- Computed hash index
1058 -- Quick handling for one character names
1060 if Name_Len = 1 then
1061 return Name_Id (First_Name_Id + Character'Pos (Name_Buffer (1)));
1063 -- Otherwise search hash table for existing matching entry
1066 Hash_Index := Namet.Hash;
1067 New_Id := Hash_Table (Hash_Index);
1069 if New_Id = No_Name then
1070 Hash_Table (Hash_Index) := Name_Entries.Last + 1;
1075 Integer (Name_Entries.Table (New_Id).Name_Len)
1080 S := Name_Entries.Table (New_Id).Name_Chars_Index;
1082 for J in 1 .. Name_Len loop
1083 if Name_Chars.Table (S + Int (J)) /= Name_Buffer (J) then
1090 -- Current entry in hash chain does not match
1093 if Name_Entries.Table (New_Id).Hash_Link /= No_Name then
1094 New_Id := Name_Entries.Table (New_Id).Hash_Link;
1096 Name_Entries.Table (New_Id).Hash_Link :=
1097 Name_Entries.Last + 1;
1104 -- We fall through here only if a matching entry was not found in the
1105 -- hash table. We now create a new entry in the names table. The hash
1106 -- link pointing to the new entry (Name_Entries.Last+1) has been set.
1108 Name_Entries.Increment_Last;
1109 Name_Entries.Table (Name_Entries.Last).Name_Chars_Index :=
1111 Name_Entries.Table (Name_Entries.Last).Name_Len := Short (Name_Len);
1112 Name_Entries.Table (Name_Entries.Last).Hash_Link := No_Name;
1113 Name_Entries.Table (Name_Entries.Last).Int_Info := 0;
1114 Name_Entries.Table (Name_Entries.Last).Byte_Info := 0;
1116 -- Set corresponding string entry in the Name_Chars table
1118 for J in 1 .. Name_Len loop
1119 Name_Chars.Increment_Last;
1120 Name_Chars.Table (Name_Chars.Last) := Name_Buffer (J);
1123 Name_Chars.Increment_Last;
1124 Name_Chars.Table (Name_Chars.Last) := ASCII.NUL;
1126 return Name_Entries.Last;
1130 ----------------------
1131 -- Reset_Name_Table --
1132 ----------------------
1134 procedure Reset_Name_Table is
1136 for J in First_Name_Id .. Name_Entries.Last loop
1137 Name_Entries.Table (J).Int_Info := 0;
1138 Name_Entries.Table (J).Byte_Info := 0;
1140 end Reset_Name_Table;
1142 --------------------------------
1143 -- Set_Character_Literal_Name --
1144 --------------------------------
1146 procedure Set_Character_Literal_Name (C : Char_Code) is
1148 Name_Buffer (1) := 'Q';
1150 Store_Encoded_Character (C);
1151 end Set_Character_Literal_Name;
1153 -------------------------
1154 -- Set_Name_Table_Byte --
1155 -------------------------
1157 procedure Set_Name_Table_Byte (Id : Name_Id; Val : Byte) is
1159 pragma Assert (Id in Name_Entries.First .. Name_Entries.Last);
1160 Name_Entries.Table (Id).Byte_Info := Val;
1161 end Set_Name_Table_Byte;
1163 -------------------------
1164 -- Set_Name_Table_Info --
1165 -------------------------
1167 procedure Set_Name_Table_Info (Id : Name_Id; Val : Int) is
1169 pragma Assert (Id in Name_Entries.First .. Name_Entries.Last);
1170 Name_Entries.Table (Id).Int_Info := Val;
1171 end Set_Name_Table_Info;
1173 -----------------------------
1174 -- Store_Encoded_Character --
1175 -----------------------------
1177 procedure Store_Encoded_Character (C : Char_Code) is
1179 procedure Set_Hex_Chars (C : Char_Code);
1180 -- Stores given value, which is in the range 0 .. 255, as two hex
1181 -- digits (using lower case a-f) in Name_Buffer, incrementing Name_Len.
1187 procedure Set_Hex_Chars (C : Char_Code) is
1188 Hexd : constant String := "0123456789abcdef";
1189 N : constant Natural := Natural (C);
1191 Name_Buffer (Name_Len + 1) := Hexd (N / 16 + 1);
1192 Name_Buffer (Name_Len + 2) := Hexd (N mod 16 + 1);
1193 Name_Len := Name_Len + 2;
1196 -- Start of processing for Store_Encoded_Character
1199 Name_Len := Name_Len + 1;
1201 if In_Character_Range (C) then
1203 CC : constant Character := Get_Character (C);
1205 if CC in 'a' .. 'z' or else CC in '0' .. '9' then
1206 Name_Buffer (Name_Len) := CC;
1208 Name_Buffer (Name_Len) := 'U';
1213 elsif In_Wide_Character_Range (C) then
1214 Name_Buffer (Name_Len) := 'W';
1215 Set_Hex_Chars (C / 256);
1216 Set_Hex_Chars (C mod 256);
1219 Name_Buffer (Name_Len) := 'W';
1220 Name_Len := Name_Len + 1;
1221 Name_Buffer (Name_Len) := 'W';
1222 Set_Hex_Chars (C / 2 ** 24);
1223 Set_Hex_Chars ((C / 2 ** 16) mod 256);
1224 Set_Hex_Chars ((C / 256) mod 256);
1225 Set_Hex_Chars (C mod 256);
1227 end Store_Encoded_Character;
1229 --------------------------------------
1230 -- Strip_Qualification_And_Suffixes --
1231 --------------------------------------
1233 procedure Strip_Qualification_And_Suffixes is
1237 -- Strip package body qualification string off end
1239 for J in reverse 2 .. Name_Len loop
1240 if Name_Buffer (J) = 'X' then
1245 exit when Name_Buffer (J) /= 'b'
1246 and then Name_Buffer (J) /= 'n'
1247 and then Name_Buffer (J) /= 'p';
1250 -- Find rightmost __ or $ separator if one exists. First we position
1251 -- to start the search. If we have a character constant, position
1252 -- just before it, otherwise position to last character but one
1254 if Name_Buffer (Name_Len) = ''' then
1256 while J > 0 and then Name_Buffer (J) /= ''' loop
1264 -- Loop to search for rightmost __ or $ (homonym) separator
1268 -- If $ separator, homonym separator, so strip it and keep looking
1270 if Name_Buffer (J) = '$' then
1274 -- Else check for __ found
1276 elsif Name_Buffer (J) = '_' and then Name_Buffer (J + 1) = '_' then
1278 -- Found __ so see if digit follows, and if so, this is a
1279 -- homonym separator, so strip it and keep looking.
1281 if Name_Buffer (J + 2) in '0' .. '9' then
1285 -- If not a homonym separator, then we simply strip the
1286 -- separator and everything that precedes it, and we are done
1289 Name_Buffer (1 .. Name_Len - J - 1) :=
1290 Name_Buffer (J + 2 .. Name_Len);
1291 Name_Len := Name_Len - J - 1;
1299 end Strip_Qualification_And_Suffixes;
1305 procedure Tree_Read is
1307 Name_Chars.Tree_Read;
1308 Name_Entries.Tree_Read;
1311 (Hash_Table'Address,
1312 Hash_Table'Length * (Hash_Table'Component_Size / Storage_Unit));
1319 procedure Tree_Write is
1321 Name_Chars.Tree_Write;
1322 Name_Entries.Tree_Write;
1325 (Hash_Table'Address,
1326 Hash_Table'Length * (Hash_Table'Component_Size / Storage_Unit));
1335 Name_Chars.Set_Last (Name_Chars.Last - Name_Chars_Reserve);
1336 Name_Entries.Set_Last (Name_Entries.Last - Name_Entries_Reserve);
1337 Name_Chars.Locked := False;
1338 Name_Entries.Locked := False;
1340 Name_Entries.Release;
1347 procedure wn (Id : Name_Id) is
1357 procedure Write_Name (Id : Name_Id) is
1359 if Id >= First_Name_Id then
1360 Get_Name_String (Id);
1361 Write_Str (Name_Buffer (1 .. Name_Len));
1365 ------------------------
1366 -- Write_Name_Decoded --
1367 ------------------------
1369 procedure Write_Name_Decoded (Id : Name_Id) is
1371 if Id >= First_Name_Id then
1372 Get_Decoded_Name_String (Id);
1373 Write_Str (Name_Buffer (1 .. Name_Len));
1375 end Write_Name_Decoded;