| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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: 1.15 $ |
| -- -- |
| -- Copyright (C) 1992-2001 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- -- |
| -- 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, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- 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. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| 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 |
| |
| ----------------------- |
| -- Local Subprograms -- |
| ----------------------- |
| |
| -- 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; |
| |
| ------------------ |
| -- 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; |
| |
| --------- |
| -- 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; |
| |
| ------------------- |
| -- 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; |
| 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) = '_'; |
| |
| Stop := Stop + 1; |
| end loop; |
| end if; |
| |
| end Scan_Enum_Lit; |
| |
| -------------- |
| -- 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; |
| |
| 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; |
| |
| end Ada.Text_IO.Enumeration_Aux; |
