1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--              A D A . T E X T _ I O . C O M P L E X _ A U X               --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--          Copyright (C) 1992-2009, 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 3,  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.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
33with Ada.Text_IO.Float_Aux;
34
35with System.Img_Real; use System.Img_Real;
36
37package body Ada.Text_IO.Complex_Aux is
38
39   package Aux renames Ada.Text_IO.Float_Aux;
40
41   ---------
42   -- Get --
43   ---------
44
45   procedure Get
46     (File  : File_Type;
47      ItemR : out Long_Long_Float;
48      ItemI : out Long_Long_Float;
49      Width : Field)
50   is
51      Buf   : String (1 .. Field'Last);
52      Stop  : Integer := 0;
53      Ptr   : aliased Integer;
54      Paren : Boolean := False;
55
56   begin
57      --  General note for following code, exceptions from the calls to
58      --  Get for components of the complex value are propagated.
59
60      if Width /= 0 then
61         Load_Width (File, Width, Buf, Stop);
62         Gets (Buf (1 .. Stop), ItemR, ItemI, Ptr);
63
64         for J in Ptr + 1 .. Stop loop
65            if not Is_Blank (Buf (J)) then
66               raise Data_Error;
67            end if;
68         end loop;
69
70      --  Case of width = 0
71
72      else
73         Load_Skip (File);
74         Ptr := 0;
75         Load (File, Buf, Ptr, '(', Paren);
76         Aux.Get (File, ItemR, 0);
77         Load_Skip (File);
78         Load (File, Buf, Ptr, ',');
79         Aux.Get (File, ItemI, 0);
80
81         if Paren then
82            Load_Skip (File);
83            Load (File, Buf, Ptr, ')', Paren);
84
85            if not Paren then
86               raise Data_Error;
87            end if;
88         end if;
89      end if;
90   end Get;
91
92   ----------
93   -- Gets --
94   ----------
95
96   procedure Gets
97     (From  : String;
98      ItemR : out Long_Long_Float;
99      ItemI : out Long_Long_Float;
100      Last  : out Positive)
101   is
102      Paren : Boolean;
103      Pos   : Integer;
104
105   begin
106      String_Skip (From, Pos);
107
108      if From (Pos) = '(' then
109         Pos := Pos + 1;
110         Paren := True;
111      else
112         Paren := False;
113      end if;
114
115      Aux.Gets (From (Pos .. From'Last), ItemR, Pos);
116
117      String_Skip (From (Pos + 1 .. From'Last), Pos);
118
119      if From (Pos) = ',' then
120         Pos := Pos + 1;
121      end if;
122
123      Aux.Gets (From (Pos .. From'Last), ItemI, Pos);
124
125      if Paren then
126         String_Skip (From (Pos + 1 .. From'Last), Pos);
127
128         if From (Pos) /= ')' then
129            raise Data_Error;
130         end if;
131      end if;
132
133      Last := Pos;
134   end Gets;
135
136   ---------
137   -- Put --
138   ---------
139
140   procedure Put
141     (File  : File_Type;
142      ItemR : Long_Long_Float;
143      ItemI : Long_Long_Float;
144      Fore  : Field;
145      Aft   : Field;
146      Exp   : Field)
147   is
148   begin
149      Put (File, '(');
150      Aux.Put (File, ItemR, Fore, Aft, Exp);
151      Put (File, ',');
152      Aux.Put (File, ItemI, Fore, Aft, Exp);
153      Put (File, ')');
154   end Put;
155
156   ----------
157   -- Puts --
158   ----------
159
160   procedure Puts
161     (To    : out String;
162      ItemR : Long_Long_Float;
163      ItemI : Long_Long_Float;
164      Aft   : Field;
165      Exp   : Field)
166   is
167      I_String : String (1 .. 3 * Field'Last);
168      R_String : String (1 .. 3 * Field'Last);
169
170      Iptr : Natural;
171      Rptr : Natural;
172
173   begin
174      --  Both parts are initially converted with a Fore of 0
175
176      Rptr := 0;
177      Set_Image_Real (ItemR, R_String, Rptr, 0, Aft, Exp);
178      Iptr := 0;
179      Set_Image_Real (ItemI, I_String, Iptr, 0, Aft, Exp);
180
181      --  Check room for both parts plus parens plus comma (RM G.1.3(34))
182
183      if Rptr + Iptr + 3 > To'Length then
184         raise Layout_Error;
185      end if;
186
187      --  If there is room, layout result according to (RM G.1.3(31-33))
188
189      To (To'First) := '(';
190      To (To'First + 1 .. To'First + Rptr) := R_String (1 .. Rptr);
191      To (To'First + Rptr + 1) := ',';
192
193      To (To'Last) := ')';
194      To (To'Last - Iptr .. To'Last - 1) := I_String (1 .. Iptr);
195
196      for J in To'First + Rptr + 2 .. To'Last - Iptr - 1 loop
197         To (J) := ' ';
198      end loop;
199
200   end Puts;
201
202end Ada.Text_IO.Complex_Aux;
203