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Diffstat (limited to 'gcc/ada/a-wtflau.adb')
| -rw-r--r-- | gcc/ada/a-wtflau.adb | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/gcc/ada/a-wtflau.adb b/gcc/ada/a-wtflau.adb new file mode 100644 index 00000000000..e4331c4b961 --- /dev/null +++ b/gcc/ada/a-wtflau.adb @@ -0,0 +1,231 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- A D A . W I D E _ T E X T _ I O . F L O A T _ A U X -- +-- -- +-- B o d y -- +-- -- +-- $Revision: 1.4 $ -- +-- -- +-- Copyright (C) 1992-1998 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.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux; + +with System.Img_Real; use System.Img_Real; +with System.Val_Real; use System.Val_Real; + +package body Ada.Wide_Text_IO.Float_Aux is + + --------- + -- Get -- + --------- + + procedure Get + (File : in File_Type; + Item : out Long_Long_Float; + Width : in Field) + is + Buf : String (1 .. Field'Last); + Stop : Integer := 0; + Ptr : aliased Integer := 1; + + begin + if Width /= 0 then + Load_Width (File, Width, Buf, Stop); + String_Skip (Buf, Ptr); + else + Load_Real (File, Buf, Stop); + end if; + + Item := Scan_Real (Buf, Ptr'Access, Stop); + + Check_End_Of_Field (File, Buf, Stop, Ptr, Width); + end Get; + + ---------- + -- Gets -- + ---------- + + procedure Gets + (From : in String; + Item : out Long_Long_Float; + Last : out Positive) + is + Pos : aliased Integer; + + begin + String_Skip (From, Pos); + Item := Scan_Real (From, Pos'Access, From'Last); + Last := Pos - 1; + + exception + when Constraint_Error => + Last := Pos - 1; + raise Data_Error; + end Gets; + + --------------- + -- Load_Real -- + --------------- + + procedure Load_Real + (File : in File_Type; + Buf : out String; + Ptr : in out Natural) + is + Loaded : Boolean; + + begin + -- Skip initial blanks and load possible sign + + Load_Skip (File); + Load (File, Buf, Ptr, '+', '-'); + + -- Case of .nnnn + + Load (File, Buf, Ptr, '.', Loaded); + + if Loaded then + Load_Digits (File, Buf, Ptr, Loaded); + + -- Hopeless junk if no digits loaded + + if not Loaded then + return; + end if; + + -- Otherwise must have digits to start + + else + Load_Digits (File, Buf, Ptr, Loaded); + + -- Hopeless junk if no digits loaded + + if not Loaded then + return; + end if; + + -- Based cases + + Load (File, Buf, Ptr, '#', ':', Loaded); + + if Loaded then + + -- Case of nnn#.xxx# + + Load (File, Buf, Ptr, '.', Loaded); + + if Loaded then + Load_Extended_Digits (File, Buf, Ptr); + + -- Case of nnn#xxx.[xxx]# or nnn#xxx# + + else + Load_Extended_Digits (File, Buf, Ptr); + Load (File, Buf, Ptr, '.', Loaded); + + if Loaded then + Load_Extended_Digits (File, Buf, Ptr); + end if; + + -- As usual, it seems strange to allow mixed base characters, + -- but that is what ACVC tests expect, see CE3804M, case (3). + + Load (File, Buf, Ptr, '#', ':'); + end if; + + -- Case of nnn.[nnn] or nnn + + else + Load (File, Buf, Ptr, '.', Loaded); + + if Loaded then + Load_Digits (File, Buf, Ptr); + end if; + end if; + end if; + + -- Deal with exponent + + Load (File, Buf, Ptr, 'E', 'e', Loaded); + + if Loaded then + Load (File, Buf, Ptr, '+', '-'); + Load_Digits (File, Buf, Ptr); + end if; + end Load_Real; + + --------- + -- Put -- + --------- + + procedure Put + (File : in File_Type; + Item : in Long_Long_Float; + Fore : in Field; + Aft : in Field; + Exp : in Field) + is + Buf : String (1 .. Field'Last); + Ptr : Natural := 0; + + begin + Set_Image_Real (Item, Buf, Ptr, Fore, Aft, Exp); + Put_Item (File, Buf (1 .. Ptr)); + end Put; + + ---------- + -- Puts -- + ---------- + + procedure Puts + (To : out String; + Item : in Long_Long_Float; + Aft : in Field; + Exp : in Field) + is + Buf : String (1 .. Field'Last); + Ptr : Natural := 0; + + begin + Set_Image_Real (Item, Buf, Ptr, Fore => 1, Aft => Aft, Exp => Exp); + + if Ptr > To'Length then + raise Layout_Error; + + else + for J in 1 .. Ptr loop + To (To'Last - Ptr + J) := Buf (J); + end loop; + + for J in To'First .. To'Last - Ptr loop + To (J) := ' '; + end loop; + end if; + end Puts; + +end Ada.Wide_Text_IO.Float_Aux; |