* config/alpha/alpha.c, config/alpha/alpha.md,
[official-gcc.git] / gcc / ada / a-ztflau.adb
blob11ca1a6b4330e14fad920cbc99826d31b384a912
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- A D A . W I D E _ W I D E _ T E X T _ I O . F L O A T _ A U X --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
21 -- --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
28 -- --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
31 -- --
32 ------------------------------------------------------------------------------
34 with Ada.Wide_Wide_Text_IO.Generic_Aux; use Ada.Wide_Wide_Text_IO.Generic_Aux;
36 with System.Img_Real; use System.Img_Real;
37 with System.Val_Real; use System.Val_Real;
39 package body Ada.Wide_Wide_Text_IO.Float_Aux is
41 ---------
42 -- Get --
43 ---------
45 procedure Get
46 (File : File_Type;
47 Item : out Long_Long_Float;
48 Width : Field)
50 Buf : String (1 .. Field'Last);
51 Stop : Integer := 0;
52 Ptr : aliased Integer := 1;
54 begin
55 if Width /= 0 then
56 Load_Width (File, Width, Buf, Stop);
57 String_Skip (Buf, Ptr);
58 else
59 Load_Real (File, Buf, Stop);
60 end if;
62 Item := Scan_Real (Buf, Ptr'Access, Stop);
64 Check_End_Of_Field (Buf, Stop, Ptr, Width);
65 end Get;
67 ----------
68 -- Gets --
69 ----------
71 procedure Gets
72 (From : String;
73 Item : out Long_Long_Float;
74 Last : out Positive)
76 Pos : aliased Integer;
78 begin
79 String_Skip (From, Pos);
80 Item := Scan_Real (From, Pos'Access, From'Last);
81 Last := Pos - 1;
83 exception
84 when Constraint_Error =>
85 raise Data_Error;
86 end Gets;
88 ---------------
89 -- Load_Real --
90 ---------------
92 procedure Load_Real
93 (File : File_Type;
94 Buf : out String;
95 Ptr : in out Natural)
97 Loaded : Boolean;
99 begin
100 -- Skip initial blanks and load possible sign
102 Load_Skip (File);
103 Load (File, Buf, Ptr, '+', '-');
105 -- Case of .nnnn
107 Load (File, Buf, Ptr, '.', Loaded);
109 if Loaded then
110 Load_Digits (File, Buf, Ptr, Loaded);
112 -- Hopeless junk if no digits loaded
114 if not Loaded then
115 return;
116 end if;
118 -- Otherwise must have digits to start
120 else
121 Load_Digits (File, Buf, Ptr, Loaded);
123 -- Hopeless junk if no digits loaded
125 if not Loaded then
126 return;
127 end if;
129 -- Based cases
131 Load (File, Buf, Ptr, '#', ':', Loaded);
133 if Loaded then
135 -- Case of nnn#.xxx#
137 Load (File, Buf, Ptr, '.', Loaded);
139 if Loaded then
140 Load_Extended_Digits (File, Buf, Ptr);
142 -- Case of nnn#xxx.[xxx]# or nnn#xxx#
144 else
145 Load_Extended_Digits (File, Buf, Ptr);
146 Load (File, Buf, Ptr, '.', Loaded);
148 if Loaded then
149 Load_Extended_Digits (File, Buf, Ptr);
150 end if;
152 -- As usual, it seems strange to allow mixed base characters,
153 -- but that is what ACVC tests expect, see CE3804M, case (3).
155 Load (File, Buf, Ptr, '#', ':');
156 end if;
158 -- Case of nnn.[nnn] or nnn
160 else
161 Load (File, Buf, Ptr, '.', Loaded);
163 if Loaded then
164 Load_Digits (File, Buf, Ptr);
165 end if;
166 end if;
167 end if;
169 -- Deal with exponent
171 Load (File, Buf, Ptr, 'E', 'e', Loaded);
173 if Loaded then
174 Load (File, Buf, Ptr, '+', '-');
175 Load_Digits (File, Buf, Ptr);
176 end if;
177 end Load_Real;
179 ---------
180 -- Put --
181 ---------
183 procedure Put
184 (File : File_Type;
185 Item : Long_Long_Float;
186 Fore : Field;
187 Aft : Field;
188 Exp : Field)
190 Buf : String (1 .. Field'Last);
191 Ptr : Natural := 0;
193 begin
194 Set_Image_Real (Item, Buf, Ptr, Fore, Aft, Exp);
195 Put_Item (File, Buf (1 .. Ptr));
196 end Put;
198 ----------
199 -- Puts --
200 ----------
202 procedure Puts
203 (To : out String;
204 Item : Long_Long_Float;
205 Aft : Field;
206 Exp : Field)
208 Buf : String (1 .. Field'Last);
209 Ptr : Natural := 0;
211 begin
212 Set_Image_Real (Item, Buf, Ptr, Fore => 1, Aft => Aft, Exp => Exp);
214 if Ptr > To'Length then
215 raise Layout_Error;
217 else
218 for J in 1 .. Ptr loop
219 To (To'Last - Ptr + J) := Buf (J);
220 end loop;
222 for J in To'First .. To'Last - Ptr loop
223 To (J) := ' ';
224 end loop;
225 end if;
226 end Puts;
228 end Ada.Wide_Wide_Text_IO.Float_Aux;