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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [namet-sp.adb] - Blame information for rev 706

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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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--                             N A M E T . S P                              --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--            Copyright (C) 2008-2009, Free Software Foundation, Inc.       --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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with System.WCh_Cnv; use System.WCh_Cnv;
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with GNAT.UTF_32_Spelling_Checker;
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package body Namet.Sp is
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   -----------------------
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   -- Local Subprograms --
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   -----------------------
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   procedure Get_Name_String_UTF_32
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     (Id     : Name_Id;
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      Result : out UTF_32_String;
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      Length : out Natural);
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   --  This procedure is similar to Get_Decoded_Name except that the output
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   --  is stored in the given Result array as single codes, so in particular
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   --  any Uhh, Whhhh, or WWhhhhhhhh sequences are decoded to appear as a
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   --  single value in the output. This call does not affect the contents of
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   --  either Name_Buffer or Name_Len. The result is in Result (1 .. Length).
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   --  The caller must ensure that the result buffer is long enough.
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   ----------------------------
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   -- Get_Name_String_UTF_32 --
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   ----------------------------
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   procedure Get_Name_String_UTF_32
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     (Id     : Name_Id;
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      Result : out UTF_32_String;
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      Length : out Natural)
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   is
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      pragma Assert (Result'First = 1);
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      SPtr : Int := Name_Entries.Table (Id).Name_Chars_Index + 1;
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      --  Index through characters of name in Name_Chars table. Initial value
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      --  points to first character of the name.
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      SLen : constant Nat := Nat (Name_Entries.Table (Id).Name_Len);
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      --  Length of the name
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      SLast : constant Int := SPtr + SLen - 1;
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      --  Last index in Name_Chars table for name
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      C : Character;
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      --  Current character from Name_Chars table
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      procedure Store_Hex (N : Natural);
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      --  Read and store next N characters starting at SPtr and store result
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      --  in next character of Result. Update SPtr past characters read.
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      ---------------
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      -- Store_Hex --
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      ---------------
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      procedure Store_Hex (N : Natural) is
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         T : UTF_32_Code;
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         C : Character;
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      begin
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         T := 0;
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         for J in 1 .. N loop
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            C := Name_Chars.Table (SPtr);
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            SPtr := SPtr + 1;
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            if C in '0' .. '9' then
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               T := 16 * T + Character'Pos (C) - Character'Pos ('0');
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            else
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               pragma Assert (C in 'a' .. 'f');
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               T := 16 * T + Character'Pos (C) - (Character'Pos ('a') - 10);
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            end if;
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         end loop;
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         Length := Length + 1;
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         pragma Assert (Length <= Result'Length);
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         Result (Length) := T;
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      end Store_Hex;
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   --  Start of processing for Get_Name_String_UTF_32
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   begin
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      Length := 0;
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      while SPtr <= SLast loop
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         C := Name_Chars.Table (SPtr);
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         --  Uhh encoding
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         if C = 'U'
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           and then SPtr <= SLast - 2
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           and then Name_Chars.Table (SPtr + 1) not in 'A' .. 'Z'
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         then
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            SPtr := SPtr + 1;
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            Store_Hex (2);
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         --  Whhhh encoding
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         elsif C = 'W'
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           and then SPtr <= SLast - 4
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           and then Name_Chars.Table (SPtr + 1) not in 'A' .. 'Z'
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         then
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            SPtr := SPtr + 1;
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            Store_Hex (4);
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         --  WWhhhhhhhh encoding
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         elsif C = 'W'
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           and then SPtr <= SLast - 8
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           and then Name_Chars.Table (SPtr + 1) = 'W'
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         then
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            SPtr := SPtr + 2;
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            Store_Hex (8);
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         --  Q encoding (character literal)
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         elsif C = 'Q' and then SPtr < SLast then
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            --  Put apostrophes around character
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            pragma Assert (Length <= Result'Last - 3);
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            Result (Length + 1) := UTF_32_Code'Val (Character'Pos ('''));
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            Result (Length + 2) :=
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              UTF_32_Code (Get_Char_Code (Name_Chars.Table (SPtr + 1)));
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            Result (Length + 3) := UTF_32_Code'Val (Character'Pos ('''));
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            SPtr := SPtr + 2;
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            Length := Length + 3;
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         --  Unencoded case
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         else
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            SPtr := SPtr + 1;
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            Length := Length + 1;
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            pragma Assert (Length <= Result'Last);
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            Result (Length) := UTF_32_Code (Get_Char_Code (C));
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         end if;
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      end loop;
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   end Get_Name_String_UTF_32;
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   ------------------------
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   -- Is_Bad_Spelling_Of --
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   ------------------------
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   function Is_Bad_Spelling_Of (Found, Expect : Name_Id) return Boolean is
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      FL : constant Natural := Natural (Length_Of_Name (Found));
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      EL : constant Natural := Natural (Length_Of_Name (Expect));
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      --  Length of input names
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      FB : UTF_32_String (1 .. 2 * FL);
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      EB : UTF_32_String (1 .. 2 * EL);
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      --  Buffers for results, a factor of 2 is more than enough, the only
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      --  sequence which expands is Q (character literal) by 1.5 times.
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      FBL : Natural;
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      EBL : Natural;
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      --  Length of decoded names
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   begin
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      Get_Name_String_UTF_32 (Found, FB, FBL);
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      Get_Name_String_UTF_32 (Expect, EB, EBL);
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      --  For an exact match, return False, otherwise check bad spelling. We
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      --  need this special test because the library routine returns True for
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      --  an exact match.
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      if FB (1 .. FBL) = EB (1 .. EBL) then
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         return False;
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      else
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         return
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           GNAT.UTF_32_Spelling_Checker.Is_Bad_Spelling_Of
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             (FB (1 .. FBL), EB (1 .. EBL));
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      end if;
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   end Is_Bad_Spelling_Of;
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end Namet.Sp;

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