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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- N A M E T -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are granted -- -- additional permissions described in the GCC Runtime Library Exception, -- -- version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- <http://www.gnu.org/licenses/>. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- WARNING: There is a C version of this package. Any changes to this -- source file must be properly reflected in the C header file namet.h -- which is created manually from namet.ads and namet.adb. with Debug; use Debug; with Opt; use Opt; with Output; use Output; with Tree_IO; use Tree_IO; with Widechar; use Widechar; package body Namet is Name_Chars_Reserve : constant := 5000; Name_Entries_Reserve : constant := 100; -- The names table is locked during gigi processing, since gigi assumes -- that the table does not move. After returning from gigi, the names -- table is unlocked again, since writing library file information needs -- to generate some extra names. To avoid the inefficiency of always -- reallocating during this second unlocked phase, we reserve a bit of -- extra space before doing the release call. Hash_Num : constant Int := 2**12; -- Number of headers in the hash table. Current hash algorithm is closely -- tailored to this choice, so it can only be changed if a corresponding -- change is made to the hash algorithm. Hash_Max : constant Int := Hash_Num - 1; -- Indexes in the hash header table run from 0 to Hash_Num - 1 subtype Hash_Index_Type is Int range 0 .. Hash_Max; -- Range of hash index values Hash_Table : array (Hash_Index_Type) of Name_Id; -- The hash table is used to locate existing entries in the names table. -- The entries point to the first names table entry whose hash value -- matches the hash code. Then subsequent names table entries with the -- same hash code value are linked through the Hash_Link fields. ----------------------- -- Local Subprograms -- ----------------------- function Hash return Hash_Index_Type; pragma Inline (Hash); -- Compute hash code for name stored in Name_Buffer (length in Name_Len) procedure Strip_Qualification_And_Suffixes; -- Given an encoded entity name in Name_Buffer, remove package body -- suffix as described for Strip_Package_Body_Suffix, and also remove -- all qualification, i.e. names followed by two underscores. The -- contents of Name_Buffer is modified by this call, and on return -- Name_Buffer and Name_Len reflect the stripped name. ----------------------------- -- Add_Char_To_Name_Buffer -- ----------------------------- procedure Add_Char_To_Name_Buffer (C : Character) is begin if Name_Len < Name_Buffer'Last then Name_Len := Name_Len + 1; Name_Buffer (Name_Len) := C; end if; end Add_Char_To_Name_Buffer; ---------------------------- -- Add_Nat_To_Name_Buffer -- ---------------------------- procedure Add_Nat_To_Name_Buffer (V : Nat) is begin if V >= 10 then Add_Nat_To_Name_Buffer (V / 10); end if; Add_Char_To_Name_Buffer (Character'Val (Character'Pos ('0') + V rem 10)); end Add_Nat_To_Name_Buffer; ---------------------------- -- Add_Str_To_Name_Buffer -- ---------------------------- procedure Add_Str_To_Name_Buffer (S : String) is begin for J in S'Range loop Add_Char_To_Name_Buffer (S (J)); end loop; end Add_Str_To_Name_Buffer; -------------- -- Finalize -- -------------- procedure Finalize is Max_Chain_Length : constant := 50; -- Max length of chains for which specific information is output F : array (Int range 0 .. Max_Chain_Length) of Int; -- N'th entry is number of chains of length N Probes : Int := 0; -- Used to compute average number of probes Nsyms : Int := 0; -- Number of symbols in table begin if Debug_Flag_H then for J in F'Range loop F (J) := 0; end loop; for J in Hash_Index_Type loop if Hash_Table (J) = No_Name then F (0) := F (0) + 1; else Write_Str ("Hash_Table ("); Write_Int (J); Write_Str (") has "); declare C : Int := 1; N : Name_Id; S : Int; begin C := 0; N := Hash_Table (J); while N /= No_Name loop N := Name_Entries.Table (N).Hash_Link; C := C + 1; end loop; Write_Int (C); Write_Str (" entries"); Write_Eol; if C < Max_Chain_Length then F (C) := F (C) + 1; else F (Max_Chain_Length) := F (Max_Chain_Length) + 1; end if; N := Hash_Table (J); while N /= No_Name loop S := Name_Entries.Table (N).Name_Chars_Index; Write_Str (" "); for J in 1 .. Name_Entries.Table (N).Name_Len loop Write_Char (Name_Chars.Table (S + Int (J))); end loop; Write_Eol; N := Name_Entries.Table (N).Hash_Link; end loop; end; end if; end loop; Write_Eol; for J in Int range 0 .. Max_Chain_Length loop if F (J) /= 0 then Write_Str ("Number of hash chains of length "); if J < 10 then Write_Char (' '); end if; Write_Int (J); if J = Max_Chain_Length then Write_Str (" or greater"); end if; Write_Str (" = "); Write_Int (F (J)); Write_Eol; if J /= 0 then Nsyms := Nsyms + F (J); Probes := Probes + F (J) * (1 + J) * 100; end if; end if; end loop; Write_Eol; Write_Str ("Average number of probes for lookup = "); Probes := Probes / Nsyms; Write_Int (Probes / 200); Write_Char ('.'); Probes := (Probes mod 200) / 2; Write_Char (Character'Val (48 + Probes / 10)); Write_Char (Character'Val (48 + Probes mod 10)); Write_Eol; Write_Eol; end if; end Finalize; ----------------------------- -- Get_Decoded_Name_String -- ----------------------------- procedure Get_Decoded_Name_String (Id : Name_Id) is C : Character; P : Natural; begin Get_Name_String (Id); -- Skip scan if we already know there are no encodings if Name_Entries.Table (Id).Name_Has_No_Encodings then return; end if; -- Quick loop to see if there is anything special to do P := 1; loop if P = Name_Len then Name_Entries.Table (Id).Name_Has_No_Encodings := True; return; else C := Name_Buffer (P); exit when C = 'U' or else C = 'W' or else C = 'Q' or else C = 'O'; P := P + 1; end if; end loop; -- Here we have at least some encoding that we must decode Decode : declare New_Len : Natural; Old : Positive; New_Buf : String (1 .. Name_Buffer'Last); procedure Copy_One_Character; -- Copy a character from Name_Buffer to New_Buf. Includes case -- of copying a Uhh,Whhhh,WWhhhhhhhh sequence and decoding it. function Hex (N : Natural) return Word; -- Scans past N digits using Old pointer and returns hex value procedure Insert_Character (C : Character); -- Insert a new character into output decoded name ------------------------ -- Copy_One_Character -- ------------------------ procedure Copy_One_Character is C : Character; begin C := Name_Buffer (Old); -- U (upper half insertion case) if C = 'U' and then Old < Name_Len and then Name_Buffer (Old + 1) not in 'A' .. 'Z' and then Name_Buffer (Old + 1) /= '_' then Old := Old + 1; -- If we have upper half encoding, then we have to set an -- appropriate wide character sequence for this character. if Upper_Half_Encoding then Widechar.Set_Wide (Char_Code (Hex (2)), New_Buf, New_Len); -- For other encoding methods, upper half characters can -- simply use their normal representation. else Insert_Character (Character'Val (Hex (2))); end if; -- WW (wide wide character insertion) elsif C = 'W' and then Old < Name_Len and then Name_Buffer (Old + 1) = 'W' then Old := Old + 2; Widechar.Set_Wide (Char_Code (Hex (8)), New_Buf, New_Len); -- W (wide character insertion) elsif C = 'W' and then Old < Name_Len and then Name_Buffer (Old + 1) not in 'A' .. 'Z' and then Name_Buffer (Old + 1) /= '_' then Old := Old + 1; Widechar.Set_Wide (Char_Code (Hex (4)), New_Buf, New_Len); -- Any other character is copied unchanged else Insert_Character (C); Old := Old + 1; end if; end Copy_One_Character; --------- -- Hex -- --------- function Hex (N : Natural) return Word is T : Word := 0; C : Character; begin for J in 1 .. N loop C := Name_Buffer (Old); Old := Old + 1; pragma Assert (C in '0' .. '9' or else C in 'a' .. 'f'); if C <= '9' then T := 16 * T + Character'Pos (C) - Character'Pos ('0'); else -- C in 'a' .. 'f' T := 16 * T + Character'Pos (C) - (Character'Pos ('a') - 10); end if; end loop; return T; end Hex; ---------------------- -- Insert_Character -- ---------------------- procedure Insert_Character (C : Character) is begin New_Len := New_Len + 1; New_Buf (New_Len) := C; end Insert_Character; -- Start of processing for Decode begin New_Len := 0; Old := 1; -- Loop through characters of name while Old <= Name_Len loop -- Case of character literal, put apostrophes around character if Name_Buffer (Old) = 'Q' and then Old < Name_Len then Old := Old + 1; Insert_Character ('''); Copy_One_Character; Insert_Character ('''); -- Case of operator name elsif Name_Buffer (Old) = 'O' and then Old < Name_Len and then Name_Buffer (Old + 1) not in 'A' .. 'Z' and then Name_Buffer (Old + 1) /= '_' then Old := Old + 1; declare -- This table maps the 2nd and 3rd characters of the name -- into the required output. Two blanks means leave the -- name alone Map : constant String := "ab " & -- Oabs => "abs" "ad+ " & -- Oadd => "+" "an " & -- Oand => "and" "co& " & -- Oconcat => "&" "di/ " & -- Odivide => "/" "eq= " & -- Oeq => "=" "ex**" & -- Oexpon => "**" "gt> " & -- Ogt => ">" "ge>=" & -- Oge => ">=" "le<=" & -- Ole => "<=" "lt< " & -- Olt => "<" "mo " & -- Omod => "mod" "mu* " & -- Omutliply => "*" "ne/=" & -- One => "/=" "no " & -- Onot => "not" "or " & -- Oor => "or" "re " & -- Orem => "rem" "su- " & -- Osubtract => "-" "xo "; -- Oxor => "xor" J : Integer; begin Insert_Character ('"'); -- Search the map. Note that this loop must terminate, if -- not we have some kind of internal error, and a constraint -- error may be raised. J := Map'First; loop exit when Name_Buffer (Old) = Map (J) and then Name_Buffer (Old + 1) = Map (J + 1); J := J + 4; end loop; -- Special operator name if Map (J + 2) /= ' ' then Insert_Character (Map (J + 2)); if Map (J + 3) /= ' ' then Insert_Character (Map (J + 3)); end if; Insert_Character ('"'); -- Skip past original operator name in input while Old <= Name_Len and then Name_Buffer (Old) in 'a' .. 'z' loop Old := Old + 1; end loop; -- For other operator names, leave them in lower case, -- surrounded by apostrophes else -- Copy original operator name from input to output while Old <= Name_Len and then Name_Buffer (Old) in 'a' .. 'z' loop Copy_One_Character; end loop; Insert_Character ('"'); end if; end; -- Else copy one character and keep going else Copy_One_Character; end if; end loop; -- Copy new buffer as result Name_Len := New_Len; Name_Buffer (1 .. New_Len) := New_Buf (1 .. New_Len); end Decode; end Get_Decoded_Name_String; ------------------------------------------- -- Get_Decoded_Name_String_With_Brackets -- ------------------------------------------- procedure Get_Decoded_Name_String_With_Brackets (Id : Name_Id) is P : Natural; begin -- Case of operator name, normal decoding is fine if Name_Buffer (1) = 'O' then Get_Decoded_Name_String (Id); -- For character literals, normal decoding is fine elsif Name_Buffer (1) = 'Q' then Get_Decoded_Name_String (Id); -- Only remaining issue is U/W/WW sequences else Get_Name_String (Id); P := 1; while P < Name_Len loop if Name_Buffer (P + 1) in 'A' .. 'Z' then P := P + 1; -- Uhh encoding elsif Name_Buffer (P) = 'U' then for J in reverse P + 3 .. P + Name_Len loop Name_Buffer (J + 3) := Name_Buffer (J); end loop; Name_Len := Name_Len + 3; Name_Buffer (P + 3) := Name_Buffer (P + 2); Name_Buffer (P + 2) := Name_Buffer (P + 1); Name_Buffer (P) := '['; Name_Buffer (P + 1) := '"'; Name_Buffer (P + 4) := '"'; Name_Buffer (P + 5) := ']'; P := P + 6; -- WWhhhhhhhh encoding elsif Name_Buffer (P) = 'W' and then P + 9 <= Name_Len and then Name_Buffer (P + 1) = 'W' and then Name_Buffer (P + 2) not in 'A' .. 'Z' and then Name_Buffer (P + 2) /= '_' then Name_Buffer (P + 12 .. Name_Len + 2) := Name_Buffer (P + 10 .. Name_Len); Name_Buffer (P) := '['; Name_Buffer (P + 1) := '"'; Name_Buffer (P + 10) := '"'; Name_Buffer (P + 11) := ']'; Name_Len := Name_Len + 2; P := P + 12; -- Whhhh encoding elsif Name_Buffer (P) = 'W' and then P < Name_Len and then Name_Buffer (P + 1) not in 'A' .. 'Z' and then Name_Buffer (P + 1) /= '_' then Name_Buffer (P + 8 .. P + Name_Len + 3) := Name_Buffer (P + 5 .. Name_Len); Name_Buffer (P + 2 .. P + 5) := Name_Buffer (P + 1 .. P + 4); Name_Buffer (P) := '['; Name_Buffer (P + 1) := '"'; Name_Buffer (P + 6) := '"'; Name_Buffer (P + 7) := ']'; Name_Len := Name_Len + 3; P := P + 8; else P := P + 1; end if; end loop; end if; end Get_Decoded_Name_String_With_Brackets; ------------------------ -- Get_Last_Two_Chars -- ------------------------ procedure Get_Last_Two_Chars (N : Name_Id; C1, C2 : out Character) is NE : Name_Entry renames Name_Entries.Table (N); NEL : constant Int := Int (NE.Name_Len); begin if NEL >= 2 then C1 := Name_Chars.Table (NE.Name_Chars_Index + NEL - 1); C2 := Name_Chars.Table (NE.Name_Chars_Index + NEL - 0); else C1 := ASCII.NUL; C2 := ASCII.NUL; end if; end Get_Last_Two_Chars; --------------------- -- Get_Name_String -- --------------------- -- Procedure version leaving result in Name_Buffer, length in Name_Len procedure Get_Name_String (Id : Name_Id) is S : Int; begin pragma Assert (Id in Name_Entries.First .. Name_Entries.Last); S := Name_Entries.Table (Id).Name_Chars_Index; Name_Len := Natural (Name_Entries.Table (Id).Name_Len); for J in 1 .. Name_Len loop Name_Buffer (J) := Name_Chars.Table (S + Int (J)); end loop; end Get_Name_String; --------------------- -- Get_Name_String -- --------------------- -- Function version returning a string function Get_Name_String (Id : Name_Id) return String is S : Int; begin pragma Assert (Id in Name_Entries.First .. Name_Entries.Last); S := Name_Entries.Table (Id).Name_Chars_Index; declare R : String (1 .. Natural (Name_Entries.Table (Id).Name_Len)); begin for J in R'Range loop R (J) := Name_Chars.Table (S + Int (J)); end loop; return R; end; end Get_Name_String; -------------------------------- -- Get_Name_String_And_Append -- -------------------------------- procedure Get_Name_String_And_Append (Id : Name_Id) is S : Int; begin pragma Assert (Id in Name_Entries.First .. Name_Entries.Last); S := Name_Entries.Table (Id).Name_Chars_Index; for J in 1 .. Natural (Name_Entries.Table (Id).Name_Len) loop Name_Len := Name_Len + 1; Name_Buffer (Name_Len) := Name_Chars.Table (S + Int (J)); end loop; end Get_Name_String_And_Append; ------------------------- -- Get_Name_Table_Byte -- ------------------------- function Get_Name_Table_Byte (Id : Name_Id) return Byte is begin pragma Assert (Id in Name_Entries.First .. Name_Entries.Last); return Name_Entries.Table (Id).Byte_Info; end Get_Name_Table_Byte; ------------------------- -- Get_Name_Table_Info -- ------------------------- function Get_Name_Table_Info (Id : Name_Id) return Int is begin pragma Assert (Id in Name_Entries.First .. Name_Entries.Last); return Name_Entries.Table (Id).Int_Info; end Get_Name_Table_Info; ----------------------------------------- -- Get_Unqualified_Decoded_Name_String -- ----------------------------------------- procedure Get_Unqualified_Decoded_Name_String (Id : Name_Id) is begin Get_Decoded_Name_String (Id); Strip_Qualification_And_Suffixes; end Get_Unqualified_Decoded_Name_String; --------------------------------- -- Get_Unqualified_Name_String -- --------------------------------- procedure Get_Unqualified_Name_String (Id : Name_Id) is begin Get_Name_String (Id); Strip_Qualification_And_Suffixes; end Get_Unqualified_Name_String; ---------- -- Hash -- ---------- function Hash return Hash_Index_Type is begin -- For the cases of 1-12 characters, all characters participate in the -- hash. The positioning is randomized, with the bias that characters -- later on participate fully (i.e. are added towards the right side). case Name_Len is when 0 => return 0; when 1 => return Character'Pos (Name_Buffer (1)); when 2 => return (( Character'Pos (Name_Buffer (1))) * 64 + Character'Pos (Name_Buffer (2))) mod Hash_Num; when 3 => return ((( Character'Pos (Name_Buffer (1))) * 16 + Character'Pos (Name_Buffer (3))) * 16 + Character'Pos (Name_Buffer (2))) mod Hash_Num; when 4 => return (((( Character'Pos (Name_Buffer (1))) * 8 + Character'Pos (Name_Buffer (2))) * 8 + Character'Pos (Name_Buffer (3))) * 8 + Character'Pos (Name_Buffer (4))) mod Hash_Num; when 5 => return ((((( Character'Pos (Name_Buffer (4))) * 8 + Character'Pos (Name_Buffer (1))) * 4 + Character'Pos (Name_Buffer (3))) * 4 + Character'Pos (Name_Buffer (5))) * 8 + Character'Pos (Name_Buffer (2))) mod Hash_Num; when 6 => return (((((( Character'Pos (Name_Buffer (5))) * 4 + Character'Pos (Name_Buffer (1))) * 4 + Character'Pos (Name_Buffer (4))) * 4 + Character'Pos (Name_Buffer (2))) * 4 + Character'Pos (Name_Buffer (6))) * 4 + Character'Pos (Name_Buffer (3))) mod Hash_Num; when 7 => return ((((((( Character'Pos (Name_Buffer (4))) * 4 + Character'Pos (Name_Buffer (3))) * 4 + Character'Pos (Name_Buffer (1))) * 4 + Character'Pos (Name_Buffer (2))) * 2 + Character'Pos (Name_Buffer (5))) * 2 + Character'Pos (Name_Buffer (7))) * 2 + Character'Pos (Name_Buffer (6))) mod Hash_Num; when 8 => return (((((((( Character'Pos (Name_Buffer (2))) * 4 + Character'Pos (Name_Buffer (1))) * 4 + Character'Pos (Name_Buffer (3))) * 2 + Character'Pos (Name_Buffer (5))) * 2 + Character'Pos (Name_Buffer (7))) * 2 + Character'Pos (Name_Buffer (6))) * 2 + Character'Pos (Name_Buffer (4))) * 2 + Character'Pos (Name_Buffer (8))) mod Hash_Num; when 9 => return ((((((((( Character'Pos (Name_Buffer (2))) * 4 + Character'Pos (Name_Buffer (1))) * 4 + Character'Pos (Name_Buffer (3))) * 4 + Character'Pos (Name_Buffer (4))) * 2 + Character'Pos (Name_Buffer (8))) * 2 + Character'Pos (Name_Buffer (7))) * 2 + Character'Pos (Name_Buffer (5))) * 2 + Character'Pos (Name_Buffer (6))) * 2 + Character'Pos (Name_Buffer (9))) mod Hash_Num; when 10 => return (((((((((( Character'Pos (Name_Buffer (01))) * 2 + Character'Pos (Name_Buffer (02))) * 2 + Character'Pos (Name_Buffer (08))) * 2 + Character'Pos (Name_Buffer (03))) * 2 + Character'Pos (Name_Buffer (04))) * 2 + Character'Pos (Name_Buffer (09))) * 2 + Character'Pos (Name_Buffer (06))) * 2 + Character'Pos (Name_Buffer (05))) * 2 + Character'Pos (Name_Buffer (07))) * 2 + Character'Pos (Name_Buffer (10))) mod Hash_Num; when 11 => return ((((((((((( Character'Pos (Name_Buffer (05))) * 2 + Character'Pos (Name_Buffer (01))) * 2 + Character'Pos (Name_Buffer (06))) * 2 + Character'Pos (Name_Buffer (09))) * 2 + Character'Pos (Name_Buffer (07))) * 2 + Character'Pos (Name_Buffer (03))) * 2 + Character'Pos (Name_Buffer (08))) * 2 + Character'Pos (Name_Buffer (02))) * 2 + Character'Pos (Name_Buffer (10))) * 2 + Character'Pos (Name_Buffer (04))) * 2 + Character'Pos (Name_Buffer (11))) mod Hash_Num; when 12 => return (((((((((((( Character'Pos (Name_Buffer (03))) * 2 + Character'Pos (Name_Buffer (02))) * 2 + Character'Pos (Name_Buffer (05))) * 2 + Character'Pos (Name_Buffer (01))) * 2 + Character'Pos (Name_Buffer (06))) * 2 + Character'Pos (Name_Buffer (04))) * 2 + Character'Pos (Name_Buffer (08))) * 2 + Character'Pos (Name_Buffer (11))) * 2 + Character'Pos (Name_Buffer (07))) * 2 + Character'Pos (Name_Buffer (09))) * 2 + Character'Pos (Name_Buffer (10))) * 2 + Character'Pos (Name_Buffer (12))) mod Hash_Num; -- Names longer than 12 characters are handled by taking the first -- 6 odd numbered characters and the last 6 even numbered characters. when others => declare Even_Name_Len : constant Integer := (Name_Len) / 2 * 2; begin return (((((((((((( Character'Pos (Name_Buffer (01))) * 2 + Character'Pos (Name_Buffer (Even_Name_Len - 10))) * 2 + Character'Pos (Name_Buffer (03))) * 2 + Character'Pos (Name_Buffer (Even_Name_Len - 08))) * 2 + Character'Pos (Name_Buffer (05))) * 2 + Character'Pos (Name_Buffer (Even_Name_Len - 06))) * 2 + Character'Pos (Name_Buffer (07))) * 2 + Character'Pos (Name_Buffer (Even_Name_Len - 04))) * 2 + Character'Pos (Name_Buffer (09))) * 2 + Character'Pos (Name_Buffer (Even_Name_Len - 02))) * 2 + Character'Pos (Name_Buffer (11))) * 2 + Character'Pos (Name_Buffer (Even_Name_Len))) mod Hash_Num; end; end case; end Hash; ---------------- -- Initialize -- ---------------- procedure Initialize is begin Name_Chars.Init; Name_Entries.Init; -- Initialize entries for one character names for C in Character loop Name_Entries.Append ((Name_Chars_Index => Name_Chars.Last, Name_Len => 1, Byte_Info => 0, Int_Info => 0, Name_Has_No_Encodings => True, Hash_Link => No_Name)); Name_Chars.Append (C); Name_Chars.Append (ASCII.NUL); end loop; -- Clear hash table for J in Hash_Index_Type loop Hash_Table (J) := No_Name; end loop; end Initialize; ---------------------- -- Is_Internal_Name -- ---------------------- -- Version taking an argument function Is_Internal_Name (Id : Name_Id) return Boolean is begin Get_Name_String (Id); return Is_Internal_Name; end Is_Internal_Name; ---------------------- -- Is_Internal_Name -- ---------------------- -- Version taking its input from Name_Buffer function Is_Internal_Name return Boolean is begin if Name_Buffer (1) = '_' or else Name_Buffer (Name_Len) = '_' then return True; else -- Test backwards, because we only want to test the last entity -- name if the name we have is qualified with other entities. for J in reverse 1 .. Name_Len loop if Is_OK_Internal_Letter (Name_Buffer (J)) then return True; -- Quit if we come to terminating double underscore (note that -- if the current character is an underscore, we know that -- there is a previous character present, since we already -- filtered out the case of Name_Buffer (1) = '_' above. elsif Name_Buffer (J) = '_' and then Name_Buffer (J - 1) = '_' and then Name_Buffer (J - 2) /= '_' then return False; end if; end loop; end if; return False; end Is_Internal_Name; --------------------------- -- Is_OK_Internal_Letter -- --------------------------- function Is_OK_Internal_Letter (C : Character) return Boolean is begin return C in 'A' .. 'Z' and then C /= 'O' and then C /= 'Q' and then C /= 'U' and then C /= 'W' and then C /= 'X'; end Is_OK_Internal_Letter; ---------------------- -- Is_Operator_Name -- ---------------------- function Is_Operator_Name (Id : Name_Id) return Boolean is S : Int; begin pragma Assert (Id in Name_Entries.First .. Name_Entries.Last); S := Name_Entries.Table (Id).Name_Chars_Index; return Name_Chars.Table (S + 1) = 'O'; end Is_Operator_Name; ------------------- -- Is_Valid_Name -- ------------------- function Is_Valid_Name (Id : Name_Id) return Boolean is begin return Id in Name_Entries.First .. Name_Entries.Last; end Is_Valid_Name; -------------------- -- Length_Of_Name -- -------------------- function Length_Of_Name (Id : Name_Id) return Nat is begin return Int (Name_Entries.Table (Id).Name_Len); end Length_Of_Name; ---------- -- Lock -- ---------- procedure Lock is begin Name_Chars.Set_Last (Name_Chars.Last + Name_Chars_Reserve); Name_Entries.Set_Last (Name_Entries.Last + Name_Entries_Reserve); Name_Chars.Locked := True; Name_Entries.Locked := True; Name_Chars.Release; Name_Entries.Release; end Lock; ------------------------ -- Name_Chars_Address -- ------------------------ function Name_Chars_Address return System.Address is begin return Name_Chars.Table (0)'Address; end Name_Chars_Address; ---------------- -- Name_Enter -- ---------------- function Name_Enter return Name_Id is begin Name_Entries.Append ((Name_Chars_Index => Name_Chars.Last, Name_Len => Short (Name_Len), Byte_Info => 0, Int_Info => 0, Name_Has_No_Encodings => False, Hash_Link => No_Name)); -- Set corresponding string entry in the Name_Chars table for J in 1 .. Name_Len loop Name_Chars.Append (Name_Buffer (J)); end loop; Name_Chars.Append (ASCII.NUL); return Name_Entries.Last; end Name_Enter; -------------------------- -- Name_Entries_Address -- -------------------------- function Name_Entries_Address return System.Address is begin return Name_Entries.Table (First_Name_Id)'Address; end Name_Entries_Address; ------------------------ -- Name_Entries_Count -- ------------------------ function Name_Entries_Count return Nat is begin return Int (Name_Entries.Last - Name_Entries.First + 1); end Name_Entries_Count; --------------- -- Name_Find -- --------------- function Name_Find return Name_Id is New_Id : Name_Id; -- Id of entry in hash search, and value to be returned S : Int; -- Pointer into string table Hash_Index : Hash_Index_Type; -- Computed hash index begin -- Quick handling for one character names if Name_Len = 1 then return Name_Id (First_Name_Id + Character'Pos (Name_Buffer (1))); -- Otherwise search hash table for existing matching entry else Hash_Index := Namet.Hash; New_Id := Hash_Table (Hash_Index); if New_Id = No_Name then Hash_Table (Hash_Index) := Name_Entries.Last + 1; else Search : loop if Name_Len /= Integer (Name_Entries.Table (New_Id).Name_Len) then goto No_Match; end if; S := Name_Entries.Table (New_Id).Name_Chars_Index; for J in 1 .. Name_Len loop if Name_Chars.Table (S + Int (J)) /= Name_Buffer (J) then goto No_Match; end if; end loop; return New_Id; -- Current entry in hash chain does not match <<No_Match>> if Name_Entries.Table (New_Id).Hash_Link /= No_Name then New_Id := Name_Entries.Table (New_Id).Hash_Link; else Name_Entries.Table (New_Id).Hash_Link := Name_Entries.Last + 1; exit Search; end if; end loop Search; end if; -- We fall through here only if a matching entry was not found in the -- hash table. We now create a new entry in the names table. The hash -- link pointing to the new entry (Name_Entries.Last+1) has been set. Name_Entries.Append ((Name_Chars_Index => Name_Chars.Last, Name_Len => Short (Name_Len), Hash_Link => No_Name, Name_Has_No_Encodings => False, Int_Info => 0, Byte_Info => 0)); -- Set corresponding string entry in the Name_Chars table for J in 1 .. Name_Len loop Name_Chars.Append (Name_Buffer (J)); end loop; Name_Chars.Append (ASCII.NUL); return Name_Entries.Last; end if; end Name_Find; ---------------------- -- Reset_Name_Table -- ---------------------- procedure Reset_Name_Table is begin for J in First_Name_Id .. Name_Entries.Last loop Name_Entries.Table (J).Int_Info := 0; Name_Entries.Table (J).Byte_Info := 0; end loop; end Reset_Name_Table; -------------------------------- -- Set_Character_Literal_Name -- -------------------------------- procedure Set_Character_Literal_Name (C : Char_Code) is begin Name_Buffer (1) := 'Q'; Name_Len := 1; Store_Encoded_Character (C); end Set_Character_Literal_Name; ------------------------- -- Set_Name_Table_Byte -- ------------------------- procedure Set_Name_Table_Byte (Id : Name_Id; Val : Byte) is begin pragma Assert (Id in Name_Entries.First .. Name_Entries.Last); Name_Entries.Table (Id).Byte_Info := Val; end Set_Name_Table_Byte; ------------------------- -- Set_Name_Table_Info -- ------------------------- procedure Set_Name_Table_Info (Id : Name_Id; Val : Int) is begin pragma Assert (Id in Name_Entries.First .. Name_Entries.Last); Name_Entries.Table (Id).Int_Info := Val; end Set_Name_Table_Info; ----------------------------- -- Store_Encoded_Character -- ----------------------------- procedure Store_Encoded_Character (C : Char_Code) is procedure Set_Hex_Chars (C : Char_Code); -- Stores given value, which is in the range 0 .. 255, as two hex -- digits (using lower case a-f) in Name_Buffer, incrementing Name_Len. ------------------- -- Set_Hex_Chars -- ------------------- procedure Set_Hex_Chars (C : Char_Code) is Hexd : constant String := "0123456789abcdef"; N : constant Natural := Natural (C); begin Name_Buffer (Name_Len + 1) := Hexd (N / 16 + 1); Name_Buffer (Name_Len + 2) := Hexd (N mod 16 + 1); Name_Len := Name_Len + 2; end Set_Hex_Chars; -- Start of processing for Store_Encoded_Character begin Name_Len := Name_Len + 1; if In_Character_Range (C) then declare CC : constant Character := Get_Character (C); begin if CC in 'a' .. 'z' or else CC in '0' .. '9' then Name_Buffer (Name_Len) := CC; else Name_Buffer (Name_Len) := 'U'; Set_Hex_Chars (C); end if; end; elsif In_Wide_Character_Range (C) then Name_Buffer (Name_Len) := 'W'; Set_Hex_Chars (C / 256); Set_Hex_Chars (C mod 256); else Name_Buffer (Name_Len) := 'W'; Name_Len := Name_Len + 1; Name_Buffer (Name_Len) := 'W'; Set_Hex_Chars (C / 2 ** 24); Set_Hex_Chars ((C / 2 ** 16) mod 256); Set_Hex_Chars ((C / 256) mod 256); Set_Hex_Chars (C mod 256); end if; end Store_Encoded_Character; -------------------------------------- -- Strip_Qualification_And_Suffixes -- -------------------------------------- procedure Strip_Qualification_And_Suffixes is J : Integer; begin -- Strip package body qualification string off end for J in reverse 2 .. Name_Len loop if Name_Buffer (J) = 'X' then Name_Len := J - 1; exit; end if; exit when Name_Buffer (J) /= 'b' and then Name_Buffer (J) /= 'n' and then Name_Buffer (J) /= 'p'; end loop; -- Find rightmost __ or $ separator if one exists. First we position -- to start the search. If we have a character constant, position -- just before it, otherwise position to last character but one if Name_Buffer (Name_Len) = ''' then J := Name_Len - 2; while J > 0 and then Name_Buffer (J) /= ''' loop J := J - 1; end loop; else J := Name_Len - 1; end if; -- Loop to search for rightmost __ or $ (homonym) separator while J > 1 loop -- If $ separator, homonym separator, so strip it and keep looking if Name_Buffer (J) = '$' then Name_Len := J - 1; J := Name_Len - 1; -- Else check for __ found elsif Name_Buffer (J) = '_' and then Name_Buffer (J + 1) = '_' then -- Found __ so see if digit follows, and if so, this is a -- homonym separator, so strip it and keep looking. if Name_Buffer (J + 2) in '0' .. '9' then Name_Len := J - 1; J := Name_Len - 1; -- If not a homonym separator, then we simply strip the -- separator and everything that precedes it, and we are done else Name_Buffer (1 .. Name_Len - J - 1) := Name_Buffer (J + 2 .. Name_Len); Name_Len := Name_Len - J - 1; exit; end if; else J := J - 1; end if; end loop; end Strip_Qualification_And_Suffixes; --------------- -- Tree_Read -- --------------- procedure Tree_Read is begin Name_Chars.Tree_Read; Name_Entries.Tree_Read; Tree_Read_Data (Hash_Table'Address, Hash_Table'Length * (Hash_Table'Component_Size / Storage_Unit)); end Tree_Read; ---------------- -- Tree_Write -- ---------------- procedure Tree_Write is begin Name_Chars.Tree_Write; Name_Entries.Tree_Write; Tree_Write_Data (Hash_Table'Address, Hash_Table'Length * (Hash_Table'Component_Size / Storage_Unit)); end Tree_Write; ------------ -- Unlock -- ------------ procedure Unlock is begin Name_Chars.Set_Last (Name_Chars.Last - Name_Chars_Reserve); Name_Entries.Set_Last (Name_Entries.Last - Name_Entries_Reserve); Name_Chars.Locked := False; Name_Entries.Locked := False; Name_Chars.Release; Name_Entries.Release; end Unlock; -------- -- wn -- -------- procedure wn (Id : Name_Id) is S : Int; begin if not Id'Valid then Write_Str ("<invalid name_id>"); elsif Id = No_Name then Write_Str ("<No_Name>"); elsif Id = Error_Name then Write_Str ("<Error_Name>"); else S := Name_Entries.Table (Id).Name_Chars_Index; Name_Len := Natural (Name_Entries.Table (Id).Name_Len); for J in 1 .. Name_Len loop Write_Char (Name_Chars.Table (S + Int (J))); end loop; end if; Write_Eol; end wn; ---------------- -- Write_Name -- ---------------- procedure Write_Name (Id : Name_Id) is begin if Id >= First_Name_Id then Get_Name_String (Id); Write_Str (Name_Buffer (1 .. Name_Len)); end if; end Write_Name; ------------------------ -- Write_Name_Decoded -- ------------------------ procedure Write_Name_Decoded (Id : Name_Id) is begin if Id >= First_Name_Id then Get_Decoded_Name_String (Id); Write_Str (Name_Buffer (1 .. Name_Len)); end if; end Write_Name_Decoded; end Namet;
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