summaryrefslogtreecommitdiff
path: root/gcc/ada/a-wtdeau.adb
blob: ff5c50c7110f707fbaae6aa12277673c1315f4ee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUNTIME COMPONENTS                          --
--                                                                          --
--         A D A . W I D E _ T E X T _ I O . D E C I M A L _ A U X          --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--                                                                          --
--          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. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Ada.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
with Ada.Wide_Text_IO.Float_Aux;   use Ada.Wide_Text_IO.Float_Aux;

with System.Img_Dec; use System.Img_Dec;
with System.Img_LLD; use System.Img_LLD;
with System.Val_Dec; use System.Val_Dec;
with System.Val_LLD; use System.Val_LLD;

package body Ada.Wide_Text_IO.Decimal_Aux is

   -------------
   -- Get_Dec --
   -------------

   function Get_Dec
     (File   : File_Type;
      Width  : Field;
      Scale  : Integer)
      return   Integer
   is
      Buf  : String (1 .. Field'Last);
      Ptr  : aliased Integer;
      Stop : Integer := 0;
      Item : Integer;

   begin
      if Width /= 0 then
         Load_Width (File, Width, Buf, Stop);
         String_Skip (Buf, Ptr);
      else
         Load_Real (File, Buf, Stop);
         Ptr := 1;
      end if;

      Item := Scan_Decimal (Buf, Ptr'Access, Stop, Scale);
      Check_End_Of_Field (Buf, Stop, Ptr, Width);
      return Item;
   end Get_Dec;

   -------------
   -- Get_LLD --
   -------------

   function Get_LLD
     (File   : File_Type;
      Width  : Field;
      Scale  : Integer)
      return   Long_Long_Integer
   is
      Buf  : String (1 .. Field'Last);
      Ptr  : aliased Integer;
      Stop : Integer := 0;
      Item : Long_Long_Integer;

   begin
      if Width /= 0 then
         Load_Width (File, Width, Buf, Stop);
         String_Skip (Buf, Ptr);
      else
         Load_Real (File, Buf, Stop);
         Ptr := 1;
      end if;

      Item := Scan_Long_Long_Decimal (Buf, Ptr'Access, Stop, Scale);
      Check_End_Of_Field (Buf, Stop, Ptr, Width);
      return Item;
   end Get_LLD;

   --------------
   -- Gets_Dec --
   --------------

   function Gets_Dec
     (From  : String;
      Last  : access Positive;
      Scale : Integer)
      return  Integer
   is
      Pos  : aliased Integer;
      Item : Integer;

   begin
      String_Skip (From, Pos);
      Item := Scan_Decimal (From, Pos'Access, From'Last, Scale);
      Last.all := Pos - 1;
      return Item;

   exception
      when Constraint_Error =>
         Last.all := Pos - 1;
         raise Data_Error;

   end Gets_Dec;

   --------------
   -- Gets_LLD --
   --------------

   function Gets_LLD
     (From  : String;
      Last  : access Positive;
      Scale : Integer)
      return  Long_Long_Integer
   is
      Pos  : aliased Integer;
      Item : Long_Long_Integer;

   begin
      String_Skip (From, Pos);
      Item := Scan_Long_Long_Decimal (From, Pos'Access, From'Last, Scale);
      Last.all := Pos - 1;
      return Item;

   exception
      when Constraint_Error =>
         Last.all := Pos - 1;
         raise Data_Error;

   end Gets_LLD;

   -------------
   -- Put_Dec --
   -------------

   procedure Put_Dec
     (File  : File_Type;
      Item  : Integer;
      Fore  : Field;
      Aft   : Field;
      Exp   : Field;
      Scale : Integer)
   is
      Buf : String (1 .. Field'Last);
      Ptr : Natural := 0;

   begin
      Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
      Put_Item (File, Buf (1 .. Ptr));
   end Put_Dec;

   -------------
   -- Put_LLD --
   -------------

   procedure Put_LLD
     (File  : File_Type;
      Item  : Long_Long_Integer;
      Fore  : Field;
      Aft   : Field;
      Exp   : Field;
      Scale : Integer)
   is
      Buf : String (1 .. Field'Last);
      Ptr : Natural := 0;

   begin
      Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
      Put_Item (File, Buf (1 .. Ptr));
   end Put_LLD;

   --------------
   -- Puts_Dec --
   --------------

   procedure Puts_Dec
     (To    : out String;
      Item  : Integer;
      Aft   : Field;
      Exp   : Field;
      Scale : Integer)
   is
      Buf  : String (1 .. Field'Last);
      Fore : Integer;
      Ptr  : Natural := 0;

   begin
      if Exp = 0 then
         Fore := To'Length - 1 - Aft;
      else
         Fore := To'Length - 2 - Aft - Exp;
      end if;

      if Fore < 1 then
         raise Layout_Error;
      end if;

      Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);

      if Ptr > To'Length then
         raise Layout_Error;
      else
         To := Buf (1 .. Ptr);
      end if;
   end Puts_Dec;

   --------------
   -- Puts_Dec --
   --------------

   procedure Puts_LLD
     (To    : out String;
      Item  : Long_Long_Integer;
      Aft   : Field;
      Exp   : Field;
      Scale : Integer)
   is
      Buf  : String (1 .. Field'Last);
      Fore : Integer;
      Ptr  : Natural := 0;

   begin
      if Exp = 0 then
         Fore := To'Length - 1 - Aft;
      else
         Fore := To'Length - 2 - Aft - Exp;
      end if;

      if Fore < 1 then
         raise Layout_Error;
      end if;

      Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);

      if Ptr > To'Length then
         raise Layout_Error;
      else
         To := Buf (1 .. Ptr);
      end if;
   end Puts_LLD;

end Ada.Wide_Text_IO.Decimal_Aux;