-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
+-- 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 2, or (at your option) any later ver- --
+-- 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
+-- 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. --
is
begin
case Wide_Character_Encoding_Method is
+
+ -- For Hex mode, just test for an ESC character. The ESC character
+ -- cannot appear in any other context in a legal Ada program.
+
when WCEM_Hex =>
return S (P) = ASCII.ESC;
- when WCEM_Upper |
- WCEM_Shift_JIS |
- WCEM_EUC |
- WCEM_UTF8 =>
- return S (P) >= Character'Val (16#80#);
+ -- For brackets, just test ["x where x is a hex character. This is
+ -- sufficient test, since this sequence cannot otherwise appear in a
+ -- legal Ada program.
when WCEM_Brackets =>
return P <= S'Last - 2
and then S (P) = '['
and then S (P + 1) = '"'
- and then S (P + 2) /= '"';
+ and then (S (P + 2) in '0' .. '9'
+ or else
+ S (P + 2) in 'a' .. 'f'
+ or else
+ S (P + 2) in 'A' .. 'F');
+
+ -- All other encoding methods use the upper bit set in the first
+ -- character to uniquely represent a wide character.
+
+ when WCEM_Upper |
+ WCEM_Shift_JIS |
+ WCEM_EUC |
+ WCEM_UTF8 =>
+ return S (P) >= Character'Val (16#80#);
end case;
end Is_Start_Of_Wide_Char;
C : out Char_Code;
Err : out Boolean)
is
+ P_Init : constant Source_Ptr := P;
+ Chr : Character;
+
function In_Char return Character;
-- Function to obtain characters of wide character escape sequence
function WC_In is new Char_Sequence_To_UTF_32 (In_Char);
- -- Start of processingf for Scan_Wide
+ -- Start of processing for Scan_Wide
begin
- C := Char_Code (WC_In (In_Char, Wide_Character_Encoding_Method));
+ Chr := In_Char;
+
+ -- Scan out the wide character. If the first character is a bracket,
+ -- we allow brackets encoding regardless of the standard encoding
+ -- method being used, but otherwise we use this standard method.
+
+ if Chr = '[' then
+ C := Char_Code (WC_In (Chr, WCEM_Brackets));
+ else
+ C := Char_Code (WC_In (Chr, Wide_Character_Encoding_Method));
+ end if;
+
Err := False;
+ Wide_Char_Byte_Count := Wide_Char_Byte_Count + Nat (P - P_Init - 1);
exception
when Constraint_Error =>
---------------
procedure Skip_Wide (S : String; P : in out Natural) is
+ P_Init : constant Natural := P;
+
function Skip_Char return Character;
-- Function to skip one character of wide character escape sequence
begin
Discard := WC_Skip (Skip_Char, Wide_Character_Encoding_Method);
+ Wide_Char_Byte_Count := Wide_Char_Byte_Count + Nat (P - P_Init - 1);
end Skip_Wide;
---------------
---------------
procedure Skip_Wide (S : Source_Buffer_Ptr; P : in out Source_Ptr) is
+ P_Init : constant Source_Ptr := P;
+
function Skip_Char return Character;
-- Function to skip one character of wide character escape sequence
begin
Discard := WC_Skip (Skip_Char, Wide_Character_Encoding_Method);
+ Wide_Char_Byte_Count := Wide_Char_Byte_Count + Nat (P - P_Init - 1);
end Skip_Wide;
end Widechar;
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