1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--              A D A . 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) 1992-2009, 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;
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.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 a 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 literal (note : is ok replacement for #)
170
171         Load (File, Buf, Ptr, '#', ':', Loaded);
172
173         if Loaded then
174            Hash_Loc := Ptr;
175            Load_Extended_Digits (File, Buf, Ptr);
176            Load (File, Buf, Ptr, Buf (Hash_Loc));
177         end if;
178
179         --  Deal with exponent
180
181         Load (File, Buf, Ptr, 'E', 'e', Loaded);
182
183         if Loaded then
184
185            --  Note: it is strange to allow a minus sign, since the syntax
186            --  does not, but that is what ACVC test CE3704F, case (6) wants.
187
188            Load (File, Buf, Ptr, '+', '-');
189            Load_Digits (File, Buf, Ptr);
190         end if;
191      end if;
192   end Load_Integer;
193
194   -------------
195   -- Put_Int --
196   -------------
197
198   procedure Put_Int
199     (File  : File_Type;
200      Item  : Integer;
201      Width : Field;
202      Base  : Number_Base)
203   is
204      Buf : String (1 .. Integer'Max (Field'Last, Width));
205      Ptr : Natural := 0;
206
207   begin
208      if Base = 10 and then Width = 0 then
209         Set_Image_Integer (Item, Buf, Ptr);
210      elsif Base = 10 then
211         Set_Image_Width_Integer (Item, Width, Buf, Ptr);
212      else
213         Set_Image_Based_Integer (Item, Base, Width, Buf, Ptr);
214      end if;
215
216      Put_Item (File, Buf (1 .. Ptr));
217   end Put_Int;
218
219   -------------
220   -- Put_LLI --
221   -------------
222
223   procedure Put_LLI
224     (File  : File_Type;
225      Item  : Long_Long_Integer;
226      Width : Field;
227      Base  : Number_Base)
228   is
229      Buf : String (1 .. Integer'Max (Field'Last, Width));
230      Ptr : Natural := 0;
231
232   begin
233      if Base = 10 and then Width = 0 then
234         Set_Image_Long_Long_Integer (Item, Buf, Ptr);
235      elsif Base = 10 then
236         Set_Image_Width_Long_Long_Integer (Item, Width, Buf, Ptr);
237      else
238         Set_Image_Based_Long_Long_Integer (Item, Base, Width, Buf, Ptr);
239      end if;
240
241      Put_Item (File, Buf (1 .. Ptr));
242   end Put_LLI;
243
244   --------------
245   -- Puts_Int --
246   --------------
247
248   procedure Puts_Int
249     (To   : out String;
250      Item : Integer;
251      Base : Number_Base)
252   is
253      Buf : String (1 .. Integer'Max (Field'Last, To'Length));
254      Ptr : Natural := 0;
255
256   begin
257      if Base = 10 then
258         Set_Image_Width_Integer (Item, To'Length, Buf, Ptr);
259      else
260         Set_Image_Based_Integer (Item, Base, To'Length, Buf, Ptr);
261      end if;
262
263      if Ptr > To'Length then
264         raise Layout_Error;
265      else
266         To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
267      end if;
268   end Puts_Int;
269
270   --------------
271   -- Puts_LLI --
272   --------------
273
274   procedure Puts_LLI
275     (To   : out String;
276      Item : Long_Long_Integer;
277      Base : Number_Base)
278   is
279      Buf : String (1 .. Integer'Max (Field'Last, To'Length));
280      Ptr : Natural := 0;
281
282   begin
283      if Base = 10 then
284         Set_Image_Width_Long_Long_Integer (Item, To'Length, Buf, Ptr);
285      else
286         Set_Image_Based_Long_Long_Integer (Item, Base, To'Length, Buf, Ptr);
287      end if;
288
289      if Ptr > To'Length then
290         raise Layout_Error;
291      else
292         To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
293      end if;
294   end Puts_LLI;
295
296end Ada.Text_IO.Integer_Aux;
297