summaryrefslogtreecommitdiff
path: root/gcc/ada/switch.adb
blob: cb5c4d11f491c8e832995858f2ab6f0f4c348a56 (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
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                               S W I T C H                                --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 1992-2009, 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 3,  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 COPYING3.  If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license.          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Osint;  use Osint;
with Output; use Output;

package body Switch is

   ----------------
   -- Bad_Switch --
   ----------------

   procedure Bad_Switch (Switch : Character) is
   begin
      Osint.Fail ("invalid switch: " & Switch);
   end Bad_Switch;

   procedure Bad_Switch (Switch : String) is
   begin
      Osint.Fail ("invalid switch: " & Switch);
   end Bad_Switch;

   ------------------------------
   -- Check_Version_And_Help_G --
   ------------------------------

   procedure Check_Version_And_Help_G
     (Tool_Name      : String;
      Initial_Year   : String;
      Version_String : String := Gnatvsn.Gnat_Version_String)
   is
      Version_Switch_Present : Boolean := False;
      Help_Switch_Present    : Boolean := False;
      Next_Arg               : Natural;

   begin
      --  First check for --version or --help

      Next_Arg := 1;
      while Next_Arg < Arg_Count loop
         declare
            Next_Argv : String (1 .. Len_Arg (Next_Arg));
         begin
            Fill_Arg (Next_Argv'Address, Next_Arg);

            if Next_Argv = Version_Switch then
               Version_Switch_Present := True;

            elsif Next_Argv = Help_Switch then
               Help_Switch_Present := True;
            end if;

            Next_Arg := Next_Arg + 1;
         end;
      end loop;

      --  If --version was used, display version and exit

      if Version_Switch_Present then
         Set_Standard_Output;
         Display_Version (Tool_Name, Initial_Year, Version_String);
         Write_Str (Gnatvsn.Gnat_Free_Software);
         Write_Eol;
         Write_Eol;
         Exit_Program (E_Success);
      end if;

      --  If --help was used, display help and exit

      if Help_Switch_Present then
         Set_Standard_Output;
         Usage;
         Write_Eol;
         Write_Line ("Report bugs to report@adacore.com");
         Exit_Program (E_Success);
      end if;
   end Check_Version_And_Help_G;

   ---------------------
   -- Display_Version --
   ---------------------

   procedure Display_Version
     (Tool_Name      : String;
      Initial_Year   : String;
      Version_String : String := Gnatvsn.Gnat_Version_String)
   is
   begin
      Write_Str (Tool_Name);
      Write_Char (' ');
      Write_Str (Version_String);
      Write_Eol;

      Write_Str ("Copyright (C) ");
      Write_Str (Initial_Year);
      Write_Char ('-');
      Write_Str (Gnatvsn.Current_Year);
      Write_Str (", ");
      Write_Str (Gnatvsn.Copyright_Holder);
      Write_Eol;
   end Display_Version;

   -------------------------
   -- Is_Front_End_Switch --
   -------------------------

   function Is_Front_End_Switch (Switch_Chars : String) return Boolean is
      Ptr : constant Positive := Switch_Chars'First;
   begin
      return Is_Switch (Switch_Chars)
        and then
          (Switch_Chars (Ptr + 1) = 'I'
            or else (Switch_Chars'Length >= 5
                      and then Switch_Chars (Ptr + 1 .. Ptr + 4) = "gnat")
            or else (Switch_Chars'Length >= 5
                      and then Switch_Chars (Ptr + 2 .. Ptr + 4) = "RTS"));
   end Is_Front_End_Switch;

   ----------------------------
   -- Is_Internal_GCC_Switch --
   ----------------------------

   function Is_Internal_GCC_Switch (Switch_Chars : String) return Boolean is
      First : constant Natural := Switch_Chars'First + 1;
      Last  : constant Natural := Switch_Last (Switch_Chars);
   begin
      return Is_Switch (Switch_Chars)
        and then
          (Switch_Chars (First .. Last) = "-param"        or else
           Switch_Chars (First .. Last) = "dumpbase"      or else
           Switch_Chars (First .. Last) = "auxbase-strip" or else
           Switch_Chars (First .. Last) = "auxbase");
   end Is_Internal_GCC_Switch;

   ---------------
   -- Is_Switch --
   ---------------

   function Is_Switch (Switch_Chars : String) return Boolean is
   begin
      return Switch_Chars'Length > 1
        and then Switch_Chars (Switch_Chars'First) = '-';
   end Is_Switch;

   -----------------
   -- Switch_last --
   -----------------

   function Switch_Last (Switch_Chars : String) return Natural is
      Last : constant Natural := Switch_Chars'Last;
   begin
      if Last >= Switch_Chars'First
        and then Switch_Chars (Last) = ASCII.NUL
      then
         return Last - 1;
      else
         return Last;
      end if;
   end Switch_Last;

   -----------------
   -- Nat_Present --
   -----------------

   function Nat_Present
     (Switch_Chars : String;
      Max          : Integer;
      Ptr          : Integer) return Boolean
   is
   begin
      return (Ptr <= Max
                and then Switch_Chars (Ptr) in '0' .. '9')
        or else
             (Ptr < Max
                and then Switch_Chars (Ptr) = '='
                and then Switch_Chars (Ptr + 1) in '0' .. '9');
   end Nat_Present;

   --------------
   -- Scan_Nat --
   --------------

   procedure Scan_Nat
     (Switch_Chars : String;
      Max          : Integer;
      Ptr          : in out Integer;
      Result       : out Nat;
      Switch       : Character)
   is
   begin
      Result := 0;

      if not Nat_Present (Switch_Chars, Max, Ptr) then
         Osint.Fail ("missing numeric value for switch: " & Switch);
      end if;

      if Switch_Chars (Ptr) = '=' then
         Ptr := Ptr + 1;
      end if;

      while Ptr <= Max and then Switch_Chars (Ptr) in '0' .. '9' loop
         Result :=
           Result * 10 +
             Character'Pos (Switch_Chars (Ptr)) - Character'Pos ('0');
         Ptr := Ptr + 1;

         if Result > Switch_Max_Value then
            Osint.Fail ("numeric value out of range for switch: " & Switch);
         end if;
      end loop;
   end Scan_Nat;

   --------------
   -- Scan_Pos --
   --------------

   procedure Scan_Pos
     (Switch_Chars : String;
      Max          : Integer;
      Ptr          : in out Integer;
      Result       : out Pos;
      Switch       : Character)
   is
      Temp : Nat;

   begin
      Scan_Nat (Switch_Chars, Max, Ptr, Temp, Switch);

      if Temp = 0 then
         Osint.Fail ("numeric value out of range for switch: " & Switch);
      end if;

      Result := Temp;
   end Scan_Pos;

end Switch;