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------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- A D A . W I D E _ T E X T _ I O . E N U M E R A T I O N _ A U X -- -- -- -- 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. -- -- -- ------------------------------------------------------------------------------ with Ada.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux; with Ada.Characters.Handling; use Ada.Characters.Handling; with Interfaces.C_Streams; use Interfaces.C_Streams; with System.WCh_Con; use System.WCh_Con; package body Ada.Wide_Text_IO.Enumeration_Aux is subtype TFT is Ada.Wide_Text_IO.File_Type; -- File type required for calls to routines in Aux ----------------------- -- Local Subprograms -- ----------------------- procedure Store_Char (WC : Wide_Character; Buf : out Wide_String; Ptr : in out Integer); -- Store a single character in buffer, checking for overflow -- These definitions replace the ones in Ada.Characters.Handling, which -- do not seem to work for some strange not understood reason ??? at -- least in the OS/2 version. function To_Lower (C : Character) return Character; ------------------ -- Get_Enum_Lit -- ------------------ procedure Get_Enum_Lit (File : File_Type; Buf : out Wide_String; Buflen : out Natural) is ch : int; WC : Wide_Character; begin Buflen := 0; Load_Skip (TFT (File)); ch := Nextc (TFT (File)); -- Character literal case. If the initial character is a quote, then -- we read as far as we can without backup (see ACVC test CE3905L) if ch = Character'Pos (''') then Get (File, WC); Store_Char (WC, Buf, Buflen); ch := Nextc (TFT (File)); if ch = LM or else ch = EOF then return; end if; Get (File, WC); Store_Char (WC, Buf, Buflen); ch := Nextc (TFT (File)); if ch /= Character'Pos (''') then return; end if; Get (File, WC); Store_Char (WC, Buf, Buflen); -- Similarly for identifiers, read as far as we can, in particular, -- do read a trailing underscore (again see ACVC test CE3905L to -- understand why we do this, although it seems somewhat peculiar). else -- Identifier must start with a letter. Any wide character value -- outside the normal Latin-1 range counts as a letter for this. if ch < 255 and then not Is_Letter (Character'Val (ch)) then return; end if; -- If we do have a letter, loop through the characters quitting on -- the first non-identifier character (note that this includes the -- cases of hitting a line mark or page mark). loop Get (File, WC); Store_Char (WC, Buf, Buflen); ch := Nextc (TFT (File)); exit when ch = EOF; if ch = Character'Pos ('_') then exit when Buf (Buflen) = '_'; elsif ch = Character'Pos (ASCII.ESC) then null; elsif File.WC_Method in WC_Upper_Half_Encoding_Method and then ch > 127 then null; else exit when not Is_Letter (Character'Val (ch)) and then not Is_Digit (Character'Val (ch)); end if; end loop; end if; end Get_Enum_Lit; --------- -- Put -- --------- procedure Put (File : File_Type; Item : Wide_String; Width : Field; Set : Type_Set) is Actual_Width : constant Integer := Integer'Max (Integer (Width), Item'Length); begin Check_On_One_Line (TFT (File), Actual_Width); if Set = Lower_Case and then Item (Item'First) /= ''' then declare Iteml : Wide_String (Item'First .. Item'Last); begin for J in Item'Range loop if Is_Character (Item (J)) then Iteml (J) := To_Wide_Character (To_Lower (To_Character (Item (J)))); else Iteml (J) := Item (J); end if; end loop; Put (File, Iteml); end; else Put (File, Item); end if; for J in 1 .. Actual_Width - Item'Length loop Put (File, ' '); end loop; end Put; ---------- -- Puts -- ---------- procedure Puts (To : out Wide_String; Item : Wide_String; Set : Type_Set) is Ptr : Natural; begin if Item'Length > To'Length then raise Layout_Error; else Ptr := To'First; for J in Item'Range loop if Set = Lower_Case and then Item (Item'First) /= ''' and then Is_Character (Item (J)) then To (Ptr) := To_Wide_Character (To_Lower (To_Character (Item (J)))); else To (Ptr) := Item (J); end if; Ptr := Ptr + 1; end loop; while Ptr <= To'Last loop To (Ptr) := ' '; Ptr := Ptr + 1; end loop; end if; end Puts; ------------------- -- Scan_Enum_Lit -- ------------------- procedure Scan_Enum_Lit (From : Wide_String; Start : out Natural; Stop : out Natural) is WC : Wide_Character; -- Processing for Scan_Enum_Lit begin Start := From'First; loop if Start > From'Last then raise End_Error; elsif Is_Character (From (Start)) and then not Is_Blank (To_Character (From (Start))) then exit; else Start := Start + 1; end if; end loop; -- Character literal case. If the initial character is a quote, then -- we read as far as we can without backup (see ACVC test CE3905L -- which is for the analogous case for reading from a file). if From (Start) = ''' then Stop := Start; if Stop = From'Last then raise Data_Error; else Stop := Stop + 1; end if; if From (Stop) in ' ' .. '~' or else From (Stop) >= Wide_Character'Val (16#80#) then if Stop = From'Last then raise Data_Error; else Stop := Stop + 1; if From (Stop) = ''' then return; end if; end if; end if; raise Data_Error; -- Similarly for identifiers, read as far as we can, in particular, -- do read a trailing underscore (again see ACVC test CE3905L to -- understand why we do this, although it seems somewhat peculiar). else -- Identifier must start with a letter, any wide character outside -- the normal Latin-1 range is considered a letter for this test. if Is_Character (From (Start)) and then not Is_Letter (To_Character (From (Start))) then raise Data_Error; end if; -- If we do have a letter, loop through the characters quitting on -- the first non-identifier character (note that this includes the -- cases of hitting a line mark or page mark). Stop := Start + 1; while Stop < From'Last loop WC := From (Stop + 1); exit when Is_Character (WC) and then not Is_Letter (To_Character (WC)) and then not Is_Letter (To_Character (WC)) and then (WC /= '_' or else From (Stop - 1) = '_'); Stop := Stop + 1; end loop; end if; end Scan_Enum_Lit; ---------------- -- Store_Char -- ---------------- procedure Store_Char (WC : Wide_Character; Buf : out Wide_String; Ptr : in out Integer) is begin if Ptr = Buf'Last then raise Data_Error; else Ptr := Ptr + 1; Buf (Ptr) := WC; end if; end Store_Char; -------------- -- To_Lower -- -------------- function To_Lower (C : Character) return Character is begin if C in 'A' .. 'Z' then return Character'Val (Character'Pos (C) + 32); else return C; end if; end To_Lower; end Ada.Wide_Text_IO.Enumeration_Aux;
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