1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--         A D A . W I D E _ T E X T _ I O . I N T E G E R  _ A U X         --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--          Copyright (C) 1992-2019, 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.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
33
34with System.Img_BIU; use System.Img_BIU;
35with System.Img_Int; use System.Img_Int;
36with System.Img_LLB; use System.Img_LLB;
37with System.Img_LLI; use System.Img_LLI;
38with System.Img_LLW; use System.Img_LLW;
39with System.Img_WIU; use System.Img_WIU;
40with System.Val_Int; use System.Val_Int;
41with System.Val_LLI; use System.Val_LLI;
42
43package body Ada.Wide_Text_IO.Integer_Aux is
44
45   -----------------------
46   -- Local Subprograms --
47   -----------------------
48
49   procedure Load_Integer
50     (File : File_Type;
51      Buf  : out String;
52      Ptr  : in out Natural);
53   --  This is an auxiliary routine that is used to load an possibly signed
54   --  integer literal value from the input file into Buf, starting at Ptr + 1.
55   --  On return, Ptr is set to the last character stored.
56
57   -------------
58   -- Get_Int --
59   -------------
60
61   procedure Get_Int
62     (File  : File_Type;
63      Item  : out Integer;
64      Width : Field)
65   is
66      Buf  : String (1 .. Field'Last);
67      Ptr  : aliased Integer := 1;
68      Stop : Integer := 0;
69
70   begin
71      if Width /= 0 then
72         Load_Width (File, Width, Buf, Stop);
73         String_Skip (Buf, Ptr);
74      else
75         Load_Integer (File, Buf, Stop);
76      end if;
77
78      Item := Scan_Integer (Buf, Ptr'Access, Stop);
79      Check_End_Of_Field (Buf, Stop, Ptr, Width);
80   end Get_Int;
81
82   -------------
83   -- Get_LLI --
84   -------------
85
86   procedure Get_LLI
87     (File  : File_Type;
88      Item  : out Long_Long_Integer;
89      Width : Field)
90   is
91      Buf  : String (1 .. Field'Last);
92      Ptr  : aliased Integer := 1;
93      Stop : Integer := 0;
94
95   begin
96      if Width /= 0 then
97         Load_Width (File, Width, Buf, Stop);
98         String_Skip (Buf, Ptr);
99      else
100         Load_Integer (File, Buf, Stop);
101      end if;
102
103      Item := Scan_Long_Long_Integer (Buf, Ptr'Access, Stop);
104      Check_End_Of_Field (Buf, Stop, Ptr, Width);
105   end Get_LLI;
106
107   --------------
108   -- Gets_Int --
109   --------------
110
111   procedure Gets_Int
112     (From : String;
113      Item : out Integer;
114      Last : out Positive)
115   is
116      Pos : aliased Integer;
117
118   begin
119      String_Skip (From, Pos);
120      Item := Scan_Integer (From, Pos'Access, From'Last);
121      Last := Pos - 1;
122
123   exception
124      when Constraint_Error =>
125         raise Data_Error;
126   end Gets_Int;
127
128   --------------
129   -- Gets_LLI --
130   --------------
131
132   procedure Gets_LLI
133     (From : String;
134      Item : out Long_Long_Integer;
135      Last : out Positive)
136   is
137      Pos : aliased Integer;
138
139   begin
140      String_Skip (From, Pos);
141      Item := Scan_Long_Long_Integer (From, Pos'Access, From'Last);
142      Last := Pos - 1;
143
144   exception
145      when Constraint_Error =>
146         raise Data_Error;
147   end Gets_LLI;
148
149   ------------------
150   -- Load_Integer --
151   ------------------
152
153   procedure Load_Integer
154     (File : File_Type;
155      Buf  : out String;
156      Ptr  : in out Natural)
157   is
158      Hash_Loc : Natural;
159      Loaded   : Boolean;
160
161   begin
162      Load_Skip (File);
163      Load (File, Buf, Ptr, '+', '-');
164
165      Load_Digits (File, Buf, Ptr, Loaded);
166
167      if Loaded then
168
169         --  Deal with based case. We recognize either the standard '#' or the
170         --  allowed alternative replacement ':' (see RM J.2(3)).
171
172         Load (File, Buf, Ptr, '#', ':', Loaded);
173
174         if Loaded then
175            Hash_Loc := Ptr;
176            Load_Extended_Digits (File, Buf, Ptr);
177            Load (File, Buf, Ptr, Buf (Hash_Loc));
178         end if;
179
180         Load (File, Buf, Ptr, 'E', 'e', Loaded);
181
182         if Loaded then
183
184            --  Note: it is strange to allow a minus sign, since the syntax
185            --  does not, but that is what ACVC test CE3704F, case (6) wants.
186
187            Load (File, Buf, Ptr, '+', '-');
188            Load_Digits (File, Buf, Ptr);
189         end if;
190      end if;
191   end Load_Integer;
192
193   -------------
194   -- Put_Int --
195   -------------
196
197   procedure Put_Int
198     (File  : File_Type;
199      Item  : Integer;
200      Width : Field;
201      Base  : Number_Base)
202   is
203      Buf : String (1 .. Field'Last);
204      Ptr : Natural := 0;
205
206   begin
207      if Base = 10 and then Width = 0 then
208         Set_Image_Integer (Item, Buf, Ptr);
209      elsif Base = 10 then
210         Set_Image_Width_Integer (Item, Width, Buf, Ptr);
211      else
212         Set_Image_Based_Integer (Item, Base, Width, Buf, Ptr);
213      end if;
214
215      Put_Item (File, Buf (1 .. Ptr));
216   end Put_Int;
217
218   -------------
219   -- Put_LLI --
220   -------------
221
222   procedure Put_LLI
223     (File  : File_Type;
224      Item  : Long_Long_Integer;
225      Width : Field;
226      Base  : Number_Base)
227   is
228      Buf : String (1 .. Field'Last);
229      Ptr : Natural := 0;
230
231   begin
232      if Base = 10 and then Width = 0 then
233         Set_Image_Long_Long_Integer (Item, Buf, Ptr);
234      elsif Base = 10 then
235         Set_Image_Width_Long_Long_Integer (Item, Width, Buf, Ptr);
236      else
237         Set_Image_Based_Long_Long_Integer (Item, Base, Width, Buf, Ptr);
238      end if;
239
240      Put_Item (File, Buf (1 .. Ptr));
241   end Put_LLI;
242
243   --------------
244   -- Puts_Int --
245   --------------
246
247   procedure Puts_Int
248     (To   : out String;
249      Item : Integer;
250      Base : Number_Base)
251   is
252      Buf : String (1 .. Field'Last);
253      Ptr : Natural := 0;
254
255   begin
256      if Base = 10 then
257         Set_Image_Width_Integer (Item, To'Length, Buf, Ptr);
258      else
259         Set_Image_Based_Integer (Item, Base, To'Length, Buf, Ptr);
260      end if;
261
262      if Ptr > To'Length then
263         raise Layout_Error;
264      else
265         To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
266      end if;
267   end Puts_Int;
268
269   --------------
270   -- Puts_LLI --
271   --------------
272
273   procedure Puts_LLI
274     (To   : out String;
275      Item : Long_Long_Integer;
276      Base : Number_Base)
277   is
278      Buf : String (1 .. Field'Last);
279      Ptr : Natural := 0;
280
281   begin
282      if Base = 10 then
283         Set_Image_Width_Long_Long_Integer (Item, To'Length, Buf, Ptr);
284      else
285         Set_Image_Based_Long_Long_Integer (Item, Base, To'Length, Buf, Ptr);
286      end if;
287
288      if Ptr > To'Length then
289         raise Layout_Error;
290      else
291         To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
292      end if;
293   end Puts_LLI;
294
295end Ada.Wide_Text_IO.Integer_Aux;
296