1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
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 2, 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 with Atree; use Atree;
28 with Einfo; use Einfo;
29 with Elists; use Elists;
30 with Exp_Util; use Exp_Util;
32 with Namet; use Namet;
33 with Sem_Util; use Sem_Util;
34 with Sinfo; use Sinfo;
36 package body Exp_Tss is
42 function Base_Init_Proc (Typ : Entity_Id) return Entity_Id is
47 pragma Assert (Ekind (Typ) in Type_Kind);
49 if Is_Private_Type (Typ) then
50 Full_Type := Underlying_Type (Base_Type (Typ));
55 if No (Full_Type) then
57 elsif Is_Concurrent_Type (Full_Type)
58 and then Present (Corresponding_Record_Type (Base_Type (Full_Type)))
60 return Init_Proc (Corresponding_Record_Type (Base_Type (Full_Type)));
63 Proc := Init_Proc (Base_Type (Full_Type));
66 and then Is_Composite_Type (Full_Type)
67 and then Is_Derived_Type (Full_Type)
69 return Init_Proc (Root_Type (Full_Type));
80 -- Note: internally this routine is also used to initially set up
81 -- a TSS entry for a new type (case of being called from Set_TSS)
83 procedure Copy_TSS (TSS : Entity_Id; Typ : Entity_Id) is
87 Ensure_Freeze_Node (Typ);
88 FN := Freeze_Node (Typ);
90 if No (TSS_Elist (FN)) then
91 Set_TSS_Elist (FN, New_Elmt_List);
94 -- We prepend here, so that a second call overrides the first, it
95 -- is not clear that this is required, but it seems reasonable.
97 Prepend_Elmt (TSS, TSS_Elist (FN));
100 ------------------------
101 -- Find_Inherited_TSS --
102 ------------------------
104 function Find_Inherited_TSS
106 Nam : TSS_Name_Type) return Entity_Id
108 Btyp : Entity_Id := Typ;
113 Btyp := Base_Type (Btyp);
114 Proc := TSS (Btyp, Nam);
116 exit when Present (Proc)
117 or else not Is_Derived_Type (Btyp);
119 -- If Typ is a derived type, it may inherit attributes from some
122 Btyp := Etype (Btyp);
127 -- If nothing else, use the TSS of the root type
129 Proc := TSS (Base_Type (Underlying_Type (Typ)), Nam);
133 end Find_Inherited_TSS;
135 -----------------------
136 -- Get_TSS_Name_Type --
137 -----------------------
139 function Get_TSS_Name (E : Entity_Id) return TSS_Name_Type is
145 Get_Last_Two_Chars (Chars (E), C1, C2);
147 if C1 in 'A' .. 'Z' and then C2 in 'A' .. 'Z' then
150 for J in TSS_Names'Range loop
151 if Nm = TSS_Names (J) then
160 ---------------------------------
161 -- Has_Non_Null_Base_Init_Proc --
162 ---------------------------------
164 function Has_Non_Null_Base_Init_Proc (Typ : Entity_Id) return Boolean is
165 BIP : constant Entity_Id := Base_Init_Proc (Typ);
168 return Present (BIP) and then not Is_Null_Init_Proc (BIP);
169 end Has_Non_Null_Base_Init_Proc;
175 function Init_Proc (Typ : Entity_Id) return Entity_Id is
176 FN : constant Node_Id := Freeze_Node (Typ);
183 elsif No (TSS_Elist (FN)) then
187 Elmt := First_Elmt (TSS_Elist (FN));
188 while Present (Elmt) loop
189 if Is_Init_Proc (Node (Elmt)) then
204 function Is_Init_Proc (E : Entity_Id) return Boolean is
208 Get_Last_Two_Chars (Chars (E), C1, C2);
209 return C1 = TSS_Init_Proc (1) and then C2 = TSS_Init_Proc (2);
216 function Is_TSS (E : Entity_Id; Nam : TSS_Name_Type) return Boolean is
220 Get_Last_Two_Chars (Chars (E), C1, C2);
221 return C1 = Nam (1) and then C2 = Nam (2);
224 function Is_TSS (N : Name_Id; Nam : TSS_Name_Type) return Boolean is
228 Get_Last_Two_Chars (N, C1, C2);
229 return C1 = Nam (1) and then C2 = Nam (2);
232 -------------------------
233 -- Make_Init_Proc_Name --
234 -------------------------
236 function Make_Init_Proc_Name (Typ : Entity_Id) return Name_Id is
238 return Make_TSS_Name (Typ, TSS_Init_Proc);
239 end Make_Init_Proc_Name;
241 -------------------------
242 -- Make_TSS_Name_Local --
243 -------------------------
245 function Make_TSS_Name_Local
247 Nam : TSS_Name_Type) return Name_Id
250 Get_Name_String (Chars (Typ));
251 Add_Char_To_Name_Buffer ('_');
252 Add_Nat_To_Name_Buffer (Increment_Serial_Number);
253 Add_Char_To_Name_Buffer (Nam (1));
254 Add_Char_To_Name_Buffer (Nam (2));
256 end Make_TSS_Name_Local;
262 function Make_TSS_Name
264 Nam : TSS_Name_Type) return Name_Id
267 Get_Name_String (Chars (Typ));
268 Add_Char_To_Name_Buffer (Nam (1));
269 Add_Char_To_Name_Buffer (Nam (2));
277 function Same_TSS (E1, E2 : Entity_Id) return Boolean is
284 Get_Last_Two_Chars (Chars (E1), E1C1, E1C2);
285 Get_Last_Two_Chars (Chars (E2), E2C1, E2C2);
301 procedure Set_Init_Proc (Typ : Entity_Id; Init : Entity_Id) is
310 procedure Set_TSS (Typ : Entity_Id; TSS : Entity_Id) is
311 Subprog_Body : constant Node_Id := Unit_Declaration_Node (TSS);
314 -- Case of insertion location is in unit defining the type
316 if In_Same_Code_Unit (Typ, TSS) then
317 Append_Freeze_Action (Typ, Subprog_Body);
319 -- Otherwise, we are using an already existing TSS in another unit
332 function TSS (Typ : Entity_Id; Nam : TSS_Name_Type) return Entity_Id is
333 FN : constant Node_Id := Freeze_Node (Typ);
341 elsif No (TSS_Elist (FN)) then
345 Elmt := First_Elmt (TSS_Elist (FN));
346 while Present (Elmt) loop
347 if Is_TSS (Node (Elmt), Nam) then
350 -- For stream subprograms, the TSS entity may be a renaming-
351 -- as-body of an already generated entity. Use that one rather
352 -- the one introduced by the renaming, which is an artifact of
353 -- current stream handling.
355 if Nkind (Parent (Parent (Subp))) =
356 N_Subprogram_Renaming_Declaration
358 Present (Corresponding_Spec (Parent (Parent (Subp))))
360 return Corresponding_Spec (Parent (Parent (Subp)));
374 function TSS (Typ : Entity_Id; Nam : Name_Id) return Entity_Id is
375 FN : constant Node_Id := Freeze_Node (Typ);
383 elsif No (TSS_Elist (FN)) then
387 Elmt := First_Elmt (TSS_Elist (FN));
388 while Present (Elmt) loop
389 if Chars (Node (Elmt)) = Nam then
392 -- For stream subprograms, the TSS entity may be a renaming-
393 -- as-body of an already generated entity. Use that one rather
394 -- the one introduced by the renaming, which is an artifact of
395 -- current stream handling.
397 if Nkind (Parent (Parent (Subp))) =
398 N_Subprogram_Renaming_Declaration
400 Present (Corresponding_Spec (Parent (Parent (Subp))))
402 return Corresponding_Spec (Parent (Parent (Subp)));