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Wrap

Text File | 1995-10-17 | 8.3 KB | 283 lines

------------------------------------------------------------------------------ -- -- -- GNAT RUNTIME COMPONENTS -- -- -- -- A D A . T E X T _ I O . E N U M E R A T I O N _ A U X -- -- -- -- B o d y -- -- -- -- $Revision: 1.11 $ -- -- -- -- Copyright (c) 1992,1993,1994,1995 NYU, All Rights Reserved -- -- -- -- The GNAT library is free software; you can redistribute it and/or modify -- -- it under terms of the GNU Library General Public License as published by -- -- the Free Software Foundation; either version 2, or (at your option) any -- -- later version. The GNAT library is distributed in the hope that it will -- -- be useful, but WITHOUT ANY WARRANTY; without even the implied warranty -- -- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -- -- Library General Public License for more details. You should have -- -- received a copy of the GNU Library General Public License along with -- -- the GNAT library; see the file COPYING.LIB. If not, write to the Free -- -- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. -- -- -- ------------------------------------------------------------------------------ with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux; with Ada.Characters.Handling; use Ada.Characters.Handling; with Interfaces.C_Streams; use Interfaces.C_Streams; -- Note: this package does not yet deal properly with wide characters ??? package body Ada.Text_IO.Enumeration_Aux is -- 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; function To_Upper (C : Character) return Character; 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; function To_Upper (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_Upper; ------------------ -- Get_Enum_Lit -- ------------------ procedure Get_Enum_Lit (File : File_Type; Buf : out String; Buflen : out Natural) is ch : int; C : Character; begin Buflen := 0; Load_Skip (File); ch := Getc (File); C := Character'Val (ch); -- 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 C = ''' then Store_Char (File, ch, Buf, Buflen); ch := Getc (File); if ch in 16#20# .. 16#7E# or else ch >= 16#80# then Store_Char (File, ch, Buf, Buflen); ch := Getc (File); if ch = Character'Pos (''') then Store_Char (File, ch, Buf, Buflen); else Ungetc (ch, File); end if; else Ungetc (ch, File); end if; -- 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 if not Is_Letter (C) then Ungetc (ch, File); 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 C := Character'Val (ch); Store_Char (File, Character'Pos (To_Upper (C)), Buf, Buflen); ch := Getc (File); exit when ch = EOF; C := Character'Val (ch); exit when not Is_Letter (C) and then not Is_Digit (C) and then C /= '_'; exit when C = '_' and then Buf (Buflen) = '_'; end loop; Ungetc (ch, File); end if; end Get_Enum_Lit; ------------------- -- Scan_Enum_Lit -- ------------------- procedure Scan_Enum_Lit (From : String; Start : out Natural; Stop : out Natural) is C : Character; -- Processing for Scan_Enum_Lit begin String_Skip (From, Start); -- 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) >= 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; Stop := Stop - 1; 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 if not Is_Letter (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 C := From (Stop + 1); exit when not Is_Letter (C) and then not Is_Digit (C) and then C /= '_'; exit when C = '_' and then From (Stop - 1) = '_'; Stop := Stop + 1; end loop; end if; end Scan_Enum_Lit; --------- -- Put -- --------- procedure Put (File : File_Type; Item : String; Width : Field; Set : Type_Set) is Actual_Width : constant Count := Count'Max (Count (Width), Item'Length); begin if Set = Lower_Case and then Item (1) /= ''' then declare Iteml : String (Item'First .. Item'Last); begin for J in Item'Range loop Iteml (J) := To_Lower (Item (J)); end loop; Put_Item (File, Iteml); end; else Put_Item (File, Item); end if; for J in 1 .. Actual_Width - Item'Length loop Put (File, ' '); end loop; end Put; ---------- -- Puts -- ---------- procedure Puts (To : out String; Item : in 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 (1) /= ''' then To (Ptr) := To_Lower (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; end Ada.Text_IO.Enumeration_Aux;