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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- N A M E T . S P --
-- --
-- B o d y --
-- --
-- Copyright (C) 2008-2009, 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. --
-- --
------------------------------------------------------------------------------
with System.WCh_Cnv; use System.WCh_Cnv;
with GNAT.UTF_32_Spelling_Checker;
package body Namet.Sp is
-----------------------
-- Local Subprograms --
-----------------------
procedure Get_Name_String_UTF_32
(Id : Name_Id;
Result : out UTF_32_String;
Length : out Natural);
-- This procedure is similar to Get_Decoded_Name except that the output
-- is stored in the given Result array as single codes, so in particular
-- any Uhh, Whhhh, or WWhhhhhhhh sequences are decoded to appear as a
-- single value in the output. This call does not affect the contents of
-- either Name_Buffer or Name_Len. The result is in Result (1 .. Length).
-- The caller must ensure that the result buffer is long enough.
----------------------------
-- Get_Name_String_UTF_32 --
----------------------------
procedure Get_Name_String_UTF_32
(Id : Name_Id;
Result : out UTF_32_String;
Length : out Natural)
is
pragma Assert (Result'First = 1);
SPtr : Int := Name_Entries.Table (Id).Name_Chars_Index + 1;
-- Index through characters of name in Name_Chars table. Initial value
-- points to first character of the name.
SLen : constant Nat := Nat (Name_Entries.Table (Id).Name_Len);
-- Length of the name
SLast : constant Int := SPtr + SLen - 1;
-- Last index in Name_Chars table for name
C : Character;
-- Current character from Name_Chars table
procedure Store_Hex (N : Natural);
-- Read and store next N characters starting at SPtr and store result
-- in next character of Result. Update SPtr past characters read.
---------------
-- Store_Hex --
---------------
procedure Store_Hex (N : Natural) is
T : UTF_32_Code;
C : Character;
begin
T := 0;
for J in 1 .. N loop
C := Name_Chars.Table (SPtr);
SPtr := SPtr + 1;
if C in '0' .. '9' then
T := 16 * T + Character'Pos (C) - Character'Pos ('0');
else
pragma Assert (C in 'a' .. 'f');
T := 16 * T + Character'Pos (C) - (Character'Pos ('a') - 10);
end if;
end loop;
Length := Length + 1;
pragma Assert (Length <= Result'Length);
Result (Length) := T;
end Store_Hex;
-- Start of processing for Get_Name_String_UTF_32
begin
Length := 0;
while SPtr <= SLast loop
C := Name_Chars.Table (SPtr);
-- Uhh encoding
if C = 'U'
and then SPtr <= SLast - 2
and then Name_Chars.Table (SPtr + 1) not in 'A' .. 'Z'
then
SPtr := SPtr + 1;
Store_Hex (2);
-- Whhhh encoding
elsif C = 'W'
and then SPtr <= SLast - 4
and then Name_Chars.Table (SPtr + 1) not in 'A' .. 'Z'
then
SPtr := SPtr + 1;
Store_Hex (4);
-- WWhhhhhhhh encoding
elsif C = 'W'
and then SPtr <= SLast - 8
and then Name_Chars.Table (SPtr + 1) = 'W'
then
SPtr := SPtr + 2;
Store_Hex (8);
-- Q encoding (character literal)
elsif C = 'Q' and then SPtr < SLast then
-- Put apostrophes around character
pragma Assert (Length <= Result'Last - 3);
Result (Length + 1) := UTF_32_Code'Val (Character'Pos ('''));
Result (Length + 2) :=
UTF_32_Code (Get_Char_Code (Name_Chars.Table (SPtr + 1)));
Result (Length + 3) := UTF_32_Code'Val (Character'Pos ('''));
SPtr := SPtr + 2;
Length := Length + 3;
-- Unencoded case
else
SPtr := SPtr + 1;
Length := Length + 1;
pragma Assert (Length <= Result'Last);
Result (Length) := UTF_32_Code (Get_Char_Code (C));
end if;
end loop;
end Get_Name_String_UTF_32;
------------------------
-- Is_Bad_Spelling_Of --
------------------------
function Is_Bad_Spelling_Of (Found, Expect : Name_Id) return Boolean is
FL : constant Natural := Natural (Length_Of_Name (Found));
EL : constant Natural := Natural (Length_Of_Name (Expect));
-- Length of input names
FB : UTF_32_String (1 .. 2 * FL);
EB : UTF_32_String (1 .. 2 * EL);
-- Buffers for results, a factor of 2 is more than enough, the only
-- sequence which expands is Q (character literal) by 1.5 times.
FBL : Natural;
EBL : Natural;
-- Length of decoded names
begin
Get_Name_String_UTF_32 (Found, FB, FBL);
Get_Name_String_UTF_32 (Expect, EB, EBL);
-- For an exact match, return False, otherwise check bad spelling. We
-- need this special test because the library routine returns True for
-- an exact match.
if FB (1 .. FBL) = EB (1 .. EBL) then
return False;
else
return
GNAT.UTF_32_Spelling_Checker.Is_Bad_Spelling_Of
(FB (1 .. FBL), EB (1 .. EBL));
end if;
end Is_Bad_Spelling_Of;
end Namet.Sp;
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