1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, 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 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. 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 COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 with Atree; use Atree;
27 with Einfo; use Einfo;
28 with Namet; use Namet;
29 with Nlists; use Nlists;
30 with Nmake; use Nmake;
32 with Rtsfind; use Rtsfind;
33 with Sem_Util; use Sem_Util;
34 with Sinfo; use Sinfo;
35 with Snames; use Snames;
36 with Stand; use Stand;
37 with Tbuild; use Tbuild;
38 with Ttypes; use Ttypes;
39 with Uintp; use Uintp;
41 package body Exp_Strm is
43 -----------------------
44 -- Local Subprograms --
45 -----------------------
47 procedure Build_Array_Read_Write_Procedure
53 -- Common routine shared to build either an array Read procedure or an
54 -- array Write procedure, Nam is Name_Read or Name_Write to select which.
55 -- Pnam is the defining identifier for the constructed procedure. The
56 -- other parameters are as for Build_Array_Read_Procedure except that
57 -- the first parameter Nod supplies the Sloc to be used to generate code.
59 procedure Build_Record_Read_Write_Procedure
65 -- Common routine shared to build a record Read Write procedure, Nam
66 -- is Name_Read or Name_Write to select which. Pnam is the defining
67 -- identifier for the constructed procedure. The other parameters are
68 -- as for Build_Record_Read_Procedure.
70 procedure Build_Stream_Function
77 -- Called to build an array or record stream function. The first three
78 -- arguments are the same as Build_Record_Or_Elementary_Input_Function.
79 -- Decls and Stms are the declarations and statements for the body and
80 -- The parameter Fnam is the name of the constructed function.
82 function Has_Stream_Standard_Rep (U_Type : Entity_Id) return Boolean;
83 -- This function is used to test the type U_Type, to determine if it has
84 -- a standard representation from a streaming point of view. Standard means
85 -- that it has a standard representation (e.g. no enumeration rep clause),
86 -- and the size of the root type is the same as the streaming size (which
87 -- is defined as value specified by a Stream_Size clause if present, or
88 -- the Esize of U_Type if not).
90 function Make_Stream_Subprogram_Name
93 Nam : TSS_Name_Type) return Entity_Id;
94 -- Return the entity that identifies the stream subprogram for type Typ
95 -- that is identified by the given Nam. This procedure deals with the
96 -- difference between tagged types (where a single subprogram associated
97 -- with the type is generated) and all other cases (where a subprogram
98 -- is generated at the point of the stream attribute reference). The
99 -- Loc parameter is used as the Sloc of the created entity.
101 function Stream_Base_Type (E : Entity_Id) return Entity_Id;
102 -- Stream attributes work on the basis of the base type except for the
103 -- array case. For the array case, we do not go to the base type, but
104 -- to the first subtype if it is constrained. This avoids problems with
105 -- incorrect conversions in the packed array case. Stream_Base_Type is
106 -- exactly this function (returns the base type, unless we have an array
107 -- type whose first subtype is constrained, in which case it returns the
110 --------------------------------
111 -- Build_Array_Input_Function --
112 --------------------------------
114 -- The function we build looks like
116 -- function typSI[_nnn] (S : access RST) return Typ is
117 -- L1 : constant Index_Type_1 := Index_Type_1'Input (S);
118 -- H1 : constant Index_Type_1 := Index_Type_1'Input (S);
119 -- L2 : constant Index_Type_2 := Index_Type_2'Input (S);
120 -- H2 : constant Index_Type_2 := Index_Type_2'Input (S);
122 -- Ln : constant Index_Type_n := Index_Type_n'Input (S);
123 -- Hn : constant Index_Type_n := Index_Type_n'Input (S);
125 -- V : Typ'Base (L1 .. H1, L2 .. H2, ... Ln .. Hn)
132 -- Note: the suffix [_nnn] is present for non-tagged types, where we
133 -- generate a local subprogram at the point of the occurrence of the
134 -- attribute reference, so the name must be unique.
136 procedure Build_Array_Input_Function
140 Fnam : out Entity_Id)
142 Dim : constant Pos := Number_Dimensions (Typ);
153 Indx := First_Index (Typ);
155 for J in 1 .. Dim loop
156 Lnam := New_External_Name ('L', J);
157 Hnam := New_External_Name ('H', J);
160 Make_Object_Declaration (Loc,
161 Defining_Identifier => Make_Defining_Identifier (Loc, Lnam),
162 Constant_Present => True,
163 Object_Definition => New_Occurrence_Of (Etype (Indx), Loc),
165 Make_Attribute_Reference (Loc,
167 New_Occurrence_Of (Stream_Base_Type (Etype (Indx)), Loc),
168 Attribute_Name => Name_Input,
169 Expressions => New_List (Make_Identifier (Loc, Name_S)))));
172 Make_Object_Declaration (Loc,
173 Defining_Identifier => Make_Defining_Identifier (Loc, Hnam),
174 Constant_Present => True,
176 New_Occurrence_Of (Stream_Base_Type (Etype (Indx)), Loc),
178 Make_Attribute_Reference (Loc,
180 New_Occurrence_Of (Stream_Base_Type (Etype (Indx)), Loc),
181 Attribute_Name => Name_Input,
182 Expressions => New_List (Make_Identifier (Loc, Name_S)))));
186 Low_Bound => Make_Identifier (Loc, Lnam),
187 High_Bound => Make_Identifier (Loc, Hnam)));
192 -- If the first subtype is constrained, use it directly. Otherwise
193 -- build a subtype indication with the proper bounds.
195 if Is_Constrained (Stream_Base_Type (Typ)) then
197 Make_Object_Declaration (Loc,
198 Defining_Identifier => Make_Defining_Identifier (Loc, Name_V),
200 New_Occurrence_Of (Stream_Base_Type (Typ), Loc)));
203 Make_Object_Declaration (Loc,
204 Defining_Identifier => Make_Defining_Identifier (Loc, Name_V),
206 Make_Subtype_Indication (Loc,
208 New_Occurrence_Of (Stream_Base_Type (Typ), Loc),
210 Make_Index_Or_Discriminant_Constraint (Loc,
211 Constraints => Ranges))));
215 Make_Attribute_Reference (Loc,
216 Prefix => New_Occurrence_Of (Typ, Loc),
217 Attribute_Name => Name_Read,
218 Expressions => New_List (
219 Make_Identifier (Loc, Name_S),
220 Make_Identifier (Loc, Name_V))),
222 Make_Simple_Return_Statement (Loc,
223 Expression => Make_Identifier (Loc, Name_V)));
226 Make_Defining_Identifier (Loc,
227 Chars => Make_TSS_Name_Local (Typ, TSS_Stream_Input));
229 Build_Stream_Function (Loc, Typ, Decl, Fnam, Decls, Stms);
230 end Build_Array_Input_Function;
232 ----------------------------------
233 -- Build_Array_Output_Procedure --
234 ----------------------------------
236 procedure Build_Array_Output_Procedure
240 Pnam : out Entity_Id)
246 -- Build series of statements to output bounds
248 Indx := First_Index (Typ);
251 for J in 1 .. Number_Dimensions (Typ) loop
253 Make_Attribute_Reference (Loc,
255 New_Occurrence_Of (Stream_Base_Type (Etype (Indx)), Loc),
256 Attribute_Name => Name_Write,
257 Expressions => New_List (
258 Make_Identifier (Loc, Name_S),
259 Make_Attribute_Reference (Loc,
260 Prefix => Make_Identifier (Loc, Name_V),
261 Attribute_Name => Name_First,
262 Expressions => New_List (
263 Make_Integer_Literal (Loc, J))))));
266 Make_Attribute_Reference (Loc,
268 New_Occurrence_Of (Stream_Base_Type (Etype (Indx)), Loc),
269 Attribute_Name => Name_Write,
270 Expressions => New_List (
271 Make_Identifier (Loc, Name_S),
272 Make_Attribute_Reference (Loc,
273 Prefix => Make_Identifier (Loc, Name_V),
274 Attribute_Name => Name_Last,
275 Expressions => New_List (
276 Make_Integer_Literal (Loc, J))))));
281 -- Append Write attribute to write array elements
284 Make_Attribute_Reference (Loc,
285 Prefix => New_Occurrence_Of (Typ, Loc),
286 Attribute_Name => Name_Write,
287 Expressions => New_List (
288 Make_Identifier (Loc, Name_S),
289 Make_Identifier (Loc, Name_V))));
292 Make_Defining_Identifier (Loc,
293 Chars => Make_TSS_Name_Local (Typ, TSS_Stream_Output));
295 Build_Stream_Procedure (Loc, Typ, Decl, Pnam, Stms, False);
296 end Build_Array_Output_Procedure;
298 --------------------------------
299 -- Build_Array_Read_Procedure --
300 --------------------------------
302 procedure Build_Array_Read_Procedure
306 Pnam : out Entity_Id)
308 Loc : constant Source_Ptr := Sloc (Nod);
312 Make_Defining_Identifier (Loc,
313 Chars => Make_TSS_Name_Local (Typ, TSS_Stream_Read));
314 Build_Array_Read_Write_Procedure (Nod, Typ, Decl, Pnam, Name_Read);
315 end Build_Array_Read_Procedure;
317 --------------------------------------
318 -- Build_Array_Read_Write_Procedure --
319 --------------------------------------
321 -- The form of the array read/write procedure is as follows:
323 -- procedure pnam (S : access RST, V : [out] Typ) is
325 -- for L1 in V'Range (1) loop
326 -- for L2 in V'Range (2) loop
328 -- for Ln in V'Range (n) loop
329 -- Component_Type'Read/Write (S, V (L1, L2, .. Ln));
336 -- The out keyword for V is supplied in the Read case
338 procedure Build_Array_Read_Write_Procedure
345 Loc : constant Source_Ptr := Sloc (Nod);
346 Ndim : constant Pos := Number_Dimensions (Typ);
347 Ctyp : constant Entity_Id := Component_Type (Typ);
354 -- First build the inner attribute call
358 for J in 1 .. Ndim loop
359 Append_To (Exl, Make_Identifier (Loc, New_External_Name ('L', J)));
363 Make_Attribute_Reference (Loc,
364 Prefix => New_Occurrence_Of (Stream_Base_Type (Ctyp), Loc),
365 Attribute_Name => Nam,
366 Expressions => New_List (
367 Make_Identifier (Loc, Name_S),
368 Make_Indexed_Component (Loc,
369 Prefix => Make_Identifier (Loc, Name_V),
370 Expressions => Exl)));
372 -- The corresponding stream attribute for the component type of the
373 -- array may be user-defined, and be frozen after the type for which
374 -- we are generating the stream subprogram. In that case, freeze the
375 -- stream attribute of the component type, whose declaration could not
376 -- generate any additional freezing actions in any case.
378 if Nam = Name_Read then
379 RW := TSS (Base_Type (Ctyp), TSS_Stream_Read);
381 RW := TSS (Base_Type (Ctyp), TSS_Stream_Write);
385 and then not Is_Frozen (RW)
390 -- Now this is the big loop to wrap that statement up in a sequence
391 -- of loops. The first time around, Stm is the attribute call. The
392 -- second and subsequent times, Stm is an inner loop.
394 for J in 1 .. Ndim loop
396 Make_Implicit_Loop_Statement (Nod,
398 Make_Iteration_Scheme (Loc,
399 Loop_Parameter_Specification =>
400 Make_Loop_Parameter_Specification (Loc,
401 Defining_Identifier =>
402 Make_Defining_Identifier (Loc,
403 Chars => New_External_Name ('L', Ndim - J + 1)),
405 Discrete_Subtype_Definition =>
406 Make_Attribute_Reference (Loc,
407 Prefix => Make_Identifier (Loc, Name_V),
408 Attribute_Name => Name_Range,
410 Expressions => New_List (
411 Make_Integer_Literal (Loc, Ndim - J + 1))))),
413 Statements => New_List (Stm));
417 Build_Stream_Procedure
418 (Loc, Typ, Decl, Pnam, New_List (Stm), Nam = Name_Read);
419 end Build_Array_Read_Write_Procedure;
421 ---------------------------------
422 -- Build_Array_Write_Procedure --
423 ---------------------------------
425 procedure Build_Array_Write_Procedure
429 Pnam : out Entity_Id)
431 Loc : constant Source_Ptr := Sloc (Nod);
435 Make_Defining_Identifier (Loc,
436 Chars => Make_TSS_Name_Local (Typ, TSS_Stream_Write));
437 Build_Array_Read_Write_Procedure (Nod, Typ, Decl, Pnam, Name_Write);
438 end Build_Array_Write_Procedure;
440 ---------------------------------
441 -- Build_Elementary_Input_Call --
442 ---------------------------------
444 function Build_Elementary_Input_Call (N : Node_Id) return Node_Id is
445 Loc : constant Source_Ptr := Sloc (N);
446 P_Type : constant Entity_Id := Entity (Prefix (N));
447 U_Type : constant Entity_Id := Underlying_Type (P_Type);
448 Rt_Type : constant Entity_Id := Root_Type (U_Type);
449 FST : constant Entity_Id := First_Subtype (U_Type);
450 Strm : constant Node_Id := First (Expressions (N));
451 Targ : constant Node_Id := Next (Strm);
457 -- Compute the size of the stream element. This is either the size of
458 -- the first subtype or if given the size of the Stream_Size attribute.
460 if Has_Stream_Size_Clause (FST) then
461 P_Size := Static_Integer (Expression (Stream_Size_Clause (FST)));
463 P_Size := Esize (FST);
466 -- Check first for Boolean and Character. These are enumeration types,
467 -- but we treat them specially, since they may require special handling
468 -- in the transfer protocol. However, this special handling only applies
469 -- if they have standard representation, otherwise they are treated like
470 -- any other enumeration type.
472 if Rt_Type = Standard_Boolean
473 and then Has_Stream_Standard_Rep (U_Type)
477 elsif Rt_Type = Standard_Character
478 and then Has_Stream_Standard_Rep (U_Type)
482 elsif Rt_Type = Standard_Wide_Character
483 and then Has_Stream_Standard_Rep (U_Type)
487 elsif Rt_Type = Standard_Wide_Wide_Character
488 and then Has_Stream_Standard_Rep (U_Type)
492 -- Floating point types
494 elsif Is_Floating_Point_Type (U_Type) then
496 -- Question: should we use P_Size or Rt_Type to distinguish between
497 -- possible floating point types? If a non-standard size or a stream
498 -- size is specified, then we should certainly use the size. But if
499 -- we have two types the same (notably Short_Float_Size = Float_Size
500 -- which is close to universally true, and Long_Long_Float_Size =
501 -- Long_Float_Size, true on most targets except the x86), then we
502 -- would really rather use the root type, so that if people want to
503 -- fiddle with System.Stream_Attributes to get inter-target portable
504 -- streams, they get the size they expect. Consider in particular the
505 -- case of a stream written on an x86, with 96-bit Long_Long_Float
506 -- being read into a non-x86 target with 64 bit Long_Long_Float. A
507 -- special version of System.Stream_Attributes can deal with this
508 -- provided the proper type is always used.
510 -- To deal with these two requirements we add the special checks
511 -- on equal sizes and use the root type to distinguish.
513 if P_Size <= Standard_Short_Float_Size
514 and then (Standard_Short_Float_Size /= Standard_Float_Size
515 or else Rt_Type = Standard_Short_Float)
519 elsif P_Size <= Standard_Float_Size then
522 elsif P_Size <= Standard_Long_Float_Size
523 and then (Standard_Long_Float_Size /= Standard_Long_Long_Float_Size
524 or else Rt_Type = Standard_Float)
532 -- Signed integer types. Also includes signed fixed-point types and
533 -- enumeration types with a signed representation.
535 -- Note on signed integer types. We do not consider types as signed for
536 -- this purpose if they have no negative numbers, or if they have biased
537 -- representation. The reason is that the value in either case basically
538 -- represents an unsigned value.
540 -- For example, consider:
542 -- type W is range 0 .. 2**32 - 1;
543 -- for W'Size use 32;
545 -- This is a signed type, but the representation is unsigned, and may
546 -- be outside the range of a 32-bit signed integer, so this must be
547 -- treated as 32-bit unsigned.
549 -- Similarly, if we have
551 -- type W is range -1 .. +254;
554 -- then the representation is unsigned
556 elsif not Is_Unsigned_Type (FST)
558 (Is_Fixed_Point_Type (U_Type)
560 Is_Enumeration_Type (U_Type)
562 (Is_Signed_Integer_Type (U_Type)
563 and then not Has_Biased_Representation (FST)))
565 if P_Size <= Standard_Short_Short_Integer_Size then
568 elsif P_Size <= Standard_Short_Integer_Size then
571 elsif P_Size <= Standard_Integer_Size then
574 elsif P_Size <= Standard_Long_Integer_Size then
581 -- Unsigned integer types, also includes unsigned fixed-point types
582 -- and enumeration types with an unsigned representation (note that
583 -- we know they are unsigned because we already tested for signed).
585 -- Also includes signed integer types that are unsigned in the sense
586 -- that they do not include negative numbers. See above for details.
588 elsif Is_Modular_Integer_Type (U_Type)
589 or else Is_Fixed_Point_Type (U_Type)
590 or else Is_Enumeration_Type (U_Type)
591 or else Is_Signed_Integer_Type (U_Type)
593 if P_Size <= Standard_Short_Short_Integer_Size then
596 elsif P_Size <= Standard_Short_Integer_Size then
599 elsif P_Size <= Standard_Integer_Size then
602 elsif P_Size <= Standard_Long_Integer_Size then
609 else pragma Assert (Is_Access_Type (U_Type));
610 if P_Size > System_Address_Size then
617 -- Call the function, and do an unchecked conversion of the result
618 -- to the actual type of the prefix. If the target is a discriminant,
619 -- and we are in the body of the default implementation of a 'Read
620 -- attribute, set target type to force a constraint check (13.13.2(35)).
621 -- If the type of the discriminant is currently private, add another
622 -- unchecked conversion from the full view.
624 if Nkind (Targ) = N_Identifier
625 and then Is_Internal_Name (Chars (Targ))
626 and then Is_TSS (Scope (Entity (Targ)), TSS_Stream_Read)
629 Unchecked_Convert_To (Base_Type (U_Type),
630 Make_Function_Call (Loc,
631 Name => New_Occurrence_Of (RTE (Lib_RE), Loc),
632 Parameter_Associations => New_List (
633 Relocate_Node (Strm))));
635 Set_Do_Range_Check (Res);
636 if Base_Type (P_Type) /= Base_Type (U_Type) then
637 Res := Unchecked_Convert_To (Base_Type (P_Type), Res);
644 Unchecked_Convert_To (P_Type,
645 Make_Function_Call (Loc,
646 Name => New_Occurrence_Of (RTE (Lib_RE), Loc),
647 Parameter_Associations => New_List (
648 Relocate_Node (Strm))));
650 end Build_Elementary_Input_Call;
652 ---------------------------------
653 -- Build_Elementary_Write_Call --
654 ---------------------------------
656 function Build_Elementary_Write_Call (N : Node_Id) return Node_Id is
657 Loc : constant Source_Ptr := Sloc (N);
658 P_Type : constant Entity_Id := Entity (Prefix (N));
659 U_Type : constant Entity_Id := Underlying_Type (P_Type);
660 Rt_Type : constant Entity_Id := Root_Type (U_Type);
661 FST : constant Entity_Id := First_Subtype (U_Type);
662 Strm : constant Node_Id := First (Expressions (N));
663 Item : constant Node_Id := Next (Strm);
669 -- Compute the size of the stream element. This is either the size of
670 -- the first subtype or if given the size of the Stream_Size attribute.
672 if Has_Stream_Size_Clause (FST) then
673 P_Size := Static_Integer (Expression (Stream_Size_Clause (FST)));
675 P_Size := Esize (FST);
678 -- Find the routine to be called
680 -- Check for First Boolean and Character. These are enumeration types,
681 -- but we treat them specially, since they may require special handling
682 -- in the transfer protocol. However, this special handling only applies
683 -- if they have standard representation, otherwise they are treated like
684 -- any other enumeration type.
686 if Rt_Type = Standard_Boolean
687 and then Has_Stream_Standard_Rep (U_Type)
691 elsif Rt_Type = Standard_Character
692 and then Has_Stream_Standard_Rep (U_Type)
696 elsif Rt_Type = Standard_Wide_Character
697 and then Has_Stream_Standard_Rep (U_Type)
701 elsif Rt_Type = Standard_Wide_Wide_Character
702 and then Has_Stream_Standard_Rep (U_Type)
706 -- Floating point types
708 elsif Is_Floating_Point_Type (U_Type) then
710 -- Question: should we use P_Size or Rt_Type to distinguish between
711 -- possible floating point types? If a non-standard size or a stream
712 -- size is specified, then we should certainly use the size. But if
713 -- we have two types the same (notably Short_Float_Size = Float_Size
714 -- which is close to universally true, and Long_Long_Float_Size =
715 -- Long_Float_Size, true on most targets except the x86), then we
716 -- would really rather use the root type, so that if people want to
717 -- fiddle with System.Stream_Attributes to get inter-target portable
718 -- streams, they get the size they expect. Consider in particular the
719 -- case of a stream written on an x86, with 96-bit Long_Long_Float
720 -- being read into a non-x86 target with 64 bit Long_Long_Float. A
721 -- special version of System.Stream_Attributes can deal with this
722 -- provided the proper type is always used.
724 -- To deal with these two requirements we add the special checks
725 -- on equal sizes and use the root type to distinguish.
727 if P_Size <= Standard_Short_Float_Size
728 and then (Standard_Short_Float_Size /= Standard_Float_Size
729 or else Rt_Type = Standard_Short_Float)
733 elsif P_Size <= Standard_Float_Size then
736 elsif P_Size <= Standard_Long_Float_Size
737 and then (Standard_Long_Float_Size /= Standard_Long_Long_Float_Size
738 or else Rt_Type = Standard_Float)
746 -- Signed integer types. Also includes signed fixed-point types and
747 -- signed enumeration types share this circuitry.
749 -- Note on signed integer types. We do not consider types as signed for
750 -- this purpose if they have no negative numbers, or if they have biased
751 -- representation. The reason is that the value in either case basically
752 -- represents an unsigned value.
754 -- For example, consider:
756 -- type W is range 0 .. 2**32 - 1;
757 -- for W'Size use 32;
759 -- This is a signed type, but the representation is unsigned, and may
760 -- be outside the range of a 32-bit signed integer, so this must be
761 -- treated as 32-bit unsigned.
763 -- Similarly, the representation is also unsigned if we have:
765 -- type W is range -1 .. +254;
768 -- forcing a biased and unsigned representation
770 elsif not Is_Unsigned_Type (FST)
772 (Is_Fixed_Point_Type (U_Type)
774 Is_Enumeration_Type (U_Type)
776 (Is_Signed_Integer_Type (U_Type)
777 and then not Has_Biased_Representation (FST)))
779 if P_Size <= Standard_Short_Short_Integer_Size then
781 elsif P_Size <= Standard_Short_Integer_Size then
783 elsif P_Size <= Standard_Integer_Size then
785 elsif P_Size <= Standard_Long_Integer_Size then
791 -- Unsigned integer types, also includes unsigned fixed-point types
792 -- and unsigned enumeration types (note we know they are unsigned
793 -- because we already tested for signed above).
795 -- Also includes signed integer types that are unsigned in the sense
796 -- that they do not include negative numbers. See above for details.
798 elsif Is_Modular_Integer_Type (U_Type)
799 or else Is_Fixed_Point_Type (U_Type)
800 or else Is_Enumeration_Type (U_Type)
801 or else Is_Signed_Integer_Type (U_Type)
803 if P_Size <= Standard_Short_Short_Integer_Size then
805 elsif P_Size <= Standard_Short_Integer_Size then
807 elsif P_Size <= Standard_Integer_Size then
809 elsif P_Size <= Standard_Long_Integer_Size then
815 else pragma Assert (Is_Access_Type (U_Type));
817 if P_Size > System_Address_Size then
824 -- Unchecked-convert parameter to the required type (i.e. the type of
825 -- the corresponding parameter, and call the appropriate routine.
827 Libent := RTE (Lib_RE);
830 Make_Procedure_Call_Statement (Loc,
831 Name => New_Occurrence_Of (Libent, Loc),
832 Parameter_Associations => New_List (
833 Relocate_Node (Strm),
834 Unchecked_Convert_To (Etype (Next_Formal (First_Formal (Libent))),
835 Relocate_Node (Item))));
836 end Build_Elementary_Write_Call;
838 -----------------------------------------
839 -- Build_Mutable_Record_Read_Procedure --
840 -----------------------------------------
842 procedure Build_Mutable_Record_Read_Procedure
846 Pnam : out Entity_Id)
848 Out_Formal : Node_Id;
849 -- Expression denoting the out formal parameter
851 Dcls : constant List_Id := New_List;
852 -- Declarations for the 'Read body
854 Stms : List_Id := New_List;
855 -- Statements for the 'Read body
858 -- Entity of the discriminant being processed
860 Tmp_For_Disc : Entity_Id;
861 -- Temporary object used to read the value of Disc
863 Tmps_For_Discs : constant List_Id := New_List;
864 -- List of object declarations for temporaries holding the read values
865 -- for the discriminants.
867 Cstr : constant List_Id := New_List;
868 -- List of constraints to be applied on temporary record
870 Discriminant_Checks : constant List_Id := New_List;
871 -- List of discriminant checks to be performed if the actual object
874 Tmp : constant Entity_Id := Make_Defining_Identifier (Loc, Name_V);
875 -- Temporary record must hide formal (assignments to components of the
876 -- record are always generated with V as the identifier for the record).
878 Constrained_Stms : List_Id := New_List;
879 -- Statements within the block where we have the constrained temporary
883 Disc := First_Discriminant (Typ);
885 -- A mutable type cannot be a tagged type, so we generate a new name
886 -- for the stream procedure.
889 Make_Defining_Identifier (Loc,
890 Chars => Make_TSS_Name_Local (Typ, TSS_Stream_Read));
893 Make_Selected_Component (Loc,
894 Prefix => New_Occurrence_Of (Pnam, Loc),
895 Selector_Name => Make_Identifier (Loc, Name_V));
897 -- Generate Reads for the discriminants of the type. The discriminants
898 -- need to be read before the rest of the components, so that
899 -- variants are initialized correctly. The discriminants must be read
900 -- into temporary variables so an incomplete Read (interrupted by an
901 -- exception, for example) does not alter the passed object.
903 while Present (Disc) loop
904 Tmp_For_Disc := Make_Defining_Identifier (Loc,
905 New_External_Name (Chars (Disc), "D"));
907 Append_To (Tmps_For_Discs,
908 Make_Object_Declaration (Loc,
909 Defining_Identifier => Tmp_For_Disc,
910 Object_Definition => New_Occurrence_Of (Etype (Disc), Loc)));
911 Set_No_Initialization (Last (Tmps_For_Discs));
914 Make_Attribute_Reference (Loc,
915 Prefix => New_Occurrence_Of (Etype (Disc), Loc),
916 Attribute_Name => Name_Read,
917 Expressions => New_List (
918 Make_Identifier (Loc, Name_S),
919 New_Occurrence_Of (Tmp_For_Disc, Loc))));
922 Make_Discriminant_Association (Loc,
923 Selector_Names => New_List (New_Occurrence_Of (Disc, Loc)),
924 Expression => New_Occurrence_Of (Tmp_For_Disc, Loc)));
926 Append_To (Discriminant_Checks,
927 Make_Raise_Constraint_Error (Loc,
930 Left_Opnd => New_Occurrence_Of (Tmp_For_Disc, Loc),
932 Make_Selected_Component (Loc,
933 Prefix => New_Copy_Tree (Out_Formal),
934 Selector_Name => New_Occurrence_Of (Disc, Loc))),
935 Reason => CE_Discriminant_Check_Failed));
936 Next_Discriminant (Disc);
939 -- Generate reads for the components of the record (including
940 -- those that depend on discriminants).
942 Build_Record_Read_Write_Procedure (Loc, Typ, Decl, Pnam, Name_Read);
944 -- If Typ has controlled components (i.e. if it is classwide
945 -- or Has_Controlled), or components constrained using the discriminants
946 -- of Typ, then we need to ensure that all component assignments
947 -- are performed on an object that has been appropriately constrained
948 -- prior to being initialized. To this effect, we wrap the component
949 -- assignments in a block where V is a constrained temporary.
952 Make_Object_Declaration (Loc,
953 Defining_Identifier => Tmp,
955 Make_Subtype_Indication (Loc,
956 Subtype_Mark => New_Occurrence_Of (Typ, Loc),
958 Make_Index_Or_Discriminant_Constraint (Loc,
959 Constraints => Cstr))));
961 Constrained_Stms := Statements (Handled_Statement_Sequence (Decl));
963 Make_Block_Statement (Loc,
964 Declarations => Dcls,
965 Handled_Statement_Sequence => Parent (Constrained_Stms)));
967 Append_To (Constrained_Stms,
968 Make_Implicit_If_Statement (Pnam,
970 Make_Attribute_Reference (Loc,
971 Prefix => New_Copy_Tree (Out_Formal),
972 Attribute_Name => Name_Constrained),
973 Then_Statements => Discriminant_Checks));
975 Append_To (Constrained_Stms,
976 Make_Assignment_Statement (Loc,
978 Expression => Make_Identifier (Loc, Name_V)));
980 if Is_Unchecked_Union (Typ) then
982 -- If this is an unchecked union, the stream procedure is erroneous,
983 -- because there are no discriminants to read.
985 -- This should generate a warning ???
989 Make_Raise_Program_Error (Loc,
990 Reason => PE_Unchecked_Union_Restriction));
993 Set_Declarations (Decl, Tmps_For_Discs);
994 Set_Handled_Statement_Sequence (Decl,
995 Make_Handled_Sequence_Of_Statements (Loc,
996 Statements => Stms));
997 end Build_Mutable_Record_Read_Procedure;
999 ------------------------------------------
1000 -- Build_Mutable_Record_Write_Procedure --
1001 ------------------------------------------
1003 procedure Build_Mutable_Record_Write_Procedure
1007 Pnam : out Entity_Id)
1015 Disc := First_Discriminant (Typ);
1017 -- Generate Writes for the discriminants of the type
1018 -- If the type is an unchecked union, use the default values of
1019 -- the discriminants, because they are not stored.
1021 while Present (Disc) loop
1022 if Is_Unchecked_Union (Typ) then
1024 New_Copy_Tree (Discriminant_Default_Value (Disc));
1027 Make_Selected_Component (Loc,
1028 Prefix => Make_Identifier (Loc, Name_V),
1029 Selector_Name => New_Occurrence_Of (Disc, Loc));
1033 Make_Attribute_Reference (Loc,
1034 Prefix => New_Occurrence_Of (Etype (Disc), Loc),
1035 Attribute_Name => Name_Write,
1036 Expressions => New_List (
1037 Make_Identifier (Loc, Name_S),
1040 Next_Discriminant (Disc);
1043 -- A mutable type cannot be a tagged type, so we generate a new name
1044 -- for the stream procedure.
1047 Make_Defining_Identifier (Loc,
1048 Chars => Make_TSS_Name_Local (Typ, TSS_Stream_Write));
1049 Build_Record_Read_Write_Procedure (Loc, Typ, Decl, Pnam, Name_Write);
1051 -- Write the discriminants before the rest of the components, so
1052 -- that discriminant values are properly set of variants, etc.
1054 if Is_Non_Empty_List (
1055 Statements (Handled_Statement_Sequence (Decl)))
1058 (First (Statements (Handled_Statement_Sequence (Decl))), Stms);
1060 Set_Statements (Handled_Statement_Sequence (Decl), Stms);
1062 end Build_Mutable_Record_Write_Procedure;
1064 -----------------------------------------------
1065 -- Build_Record_Or_Elementary_Input_Function --
1066 -----------------------------------------------
1068 -- The function we build looks like
1070 -- function InputN (S : access RST) return Typ is
1071 -- C1 : constant Disc_Type_1;
1072 -- Discr_Type_1'Read (S, C1);
1073 -- C2 : constant Disc_Type_2;
1074 -- Discr_Type_2'Read (S, C2);
1076 -- Cn : constant Disc_Type_n;
1077 -- Discr_Type_n'Read (S, Cn);
1078 -- V : Typ (C1, C2, .. Cn)
1085 -- The discriminants are of course only present in the case of a record
1086 -- with discriminants. In the case of a record with no discriminants, or
1087 -- an elementary type, then no Cn constants are defined.
1089 procedure Build_Record_Or_Elementary_Input_Function
1093 Fnam : out Entity_Id)
1110 if Has_Discriminants (Typ) then
1111 Discr := First_Discriminant (Typ);
1113 while Present (Discr) loop
1114 Cn := New_External_Name ('C', J);
1117 Make_Object_Declaration (Loc,
1118 Defining_Identifier => Make_Defining_Identifier (Loc, Cn),
1119 Object_Definition =>
1120 New_Occurrence_Of (Etype (Discr), Loc));
1122 -- If the this is an access discriminant, do not perform default
1123 -- initialization. The discriminant is about to get its value
1124 -- from Read, and if the type is null excluding we do not want
1125 -- spurious warnings on an initial null.
1127 if Is_Access_Type (Etype (Discr)) then
1128 Set_No_Initialization (Decl);
1131 Append_To (Decls, Decl);
1133 Make_Attribute_Reference (Loc,
1134 Prefix => New_Occurrence_Of (Etype (Discr), Loc),
1135 Attribute_Name => Name_Read,
1136 Expressions => New_List (
1137 Make_Identifier (Loc, Name_S),
1138 Make_Identifier (Loc, Cn))));
1140 Append_To (Constr, Make_Identifier (Loc, Cn));
1142 Next_Discriminant (Discr);
1147 Make_Subtype_Indication (Loc,
1148 Subtype_Mark => New_Occurrence_Of (Typ, Loc),
1150 Make_Index_Or_Discriminant_Constraint (Loc,
1151 Constraints => Constr));
1153 -- If no discriminants, then just use the type with no constraint
1156 Odef := New_Occurrence_Of (Typ, Loc);
1159 -- For Ada 2005 we create an extended return statement encapsulating
1160 -- the result object and 'Read call, which is needed in general for
1161 -- proper handling of build-in-place results (such as when the result
1162 -- type is inherently limited).
1164 -- Perhaps we should just generate an extended return in all cases???
1167 Make_Object_Declaration (Loc,
1168 Defining_Identifier => Make_Defining_Identifier (Loc, Name_V),
1169 Object_Definition => Odef);
1171 -- If the type is an access type, do not perform default initialization.
1172 -- The object is about to get its value from Read, and if the type is
1173 -- null excluding we do not want spurious warnings on an initial null.
1175 if Is_Access_Type (Typ) then
1176 Set_No_Initialization (Obj_Decl);
1179 if Ada_Version >= Ada_05 then
1181 Make_Extended_Return_Statement (Loc,
1182 Return_Object_Declarations => New_List (Obj_Decl),
1183 Handled_Statement_Sequence =>
1184 Make_Handled_Sequence_Of_Statements (Loc,
1185 New_List (Make_Attribute_Reference (Loc,
1186 Prefix => New_Occurrence_Of (Typ, Loc),
1187 Attribute_Name => Name_Read,
1188 Expressions => New_List (
1189 Make_Identifier (Loc, Name_S),
1190 Make_Identifier (Loc, Name_V)))))));
1193 Append_To (Decls, Obj_Decl);
1196 Make_Attribute_Reference (Loc,
1197 Prefix => New_Occurrence_Of (Typ, Loc),
1198 Attribute_Name => Name_Read,
1199 Expressions => New_List (
1200 Make_Identifier (Loc, Name_S),
1201 Make_Identifier (Loc, Name_V))),
1203 Make_Simple_Return_Statement (Loc,
1204 Expression => Make_Identifier (Loc, Name_V)));
1207 Fnam := Make_Stream_Subprogram_Name (Loc, Typ, TSS_Stream_Input);
1209 Build_Stream_Function (Loc, Typ, Decl, Fnam, Decls, Stms);
1210 end Build_Record_Or_Elementary_Input_Function;
1212 -------------------------------------------------
1213 -- Build_Record_Or_Elementary_Output_Procedure --
1214 -------------------------------------------------
1216 procedure Build_Record_Or_Elementary_Output_Procedure
1220 Pnam : out Entity_Id)
1229 -- Note that of course there will be no discriminants for the
1230 -- elementary type case, so Has_Discriminants will be False.
1232 if Has_Discriminants (Typ) then
1233 Disc := First_Discriminant (Typ);
1235 while Present (Disc) loop
1237 -- If the type is an unchecked union, it must have default
1238 -- discriminants (this is checked earlier), and those defaults
1239 -- are written out to the stream.
1241 if Is_Unchecked_Union (Typ) then
1242 Disc_Ref := New_Copy_Tree (Discriminant_Default_Value (Disc));
1246 Make_Selected_Component (Loc,
1247 Prefix => Make_Identifier (Loc, Name_V),
1248 Selector_Name => New_Occurrence_Of (Disc, Loc));
1252 Make_Attribute_Reference (Loc,
1254 New_Occurrence_Of (Stream_Base_Type (Etype (Disc)), Loc),
1255 Attribute_Name => Name_Write,
1256 Expressions => New_List (
1257 Make_Identifier (Loc, Name_S),
1260 Next_Discriminant (Disc);
1265 Make_Attribute_Reference (Loc,
1266 Prefix => New_Occurrence_Of (Typ, Loc),
1267 Attribute_Name => Name_Write,
1268 Expressions => New_List (
1269 Make_Identifier (Loc, Name_S),
1270 Make_Identifier (Loc, Name_V))));
1272 Pnam := Make_Stream_Subprogram_Name (Loc, Typ, TSS_Stream_Output);
1274 Build_Stream_Procedure (Loc, Typ, Decl, Pnam, Stms, False);
1275 end Build_Record_Or_Elementary_Output_Procedure;
1277 ---------------------------------
1278 -- Build_Record_Read_Procedure --
1279 ---------------------------------
1281 procedure Build_Record_Read_Procedure
1285 Pnam : out Entity_Id)
1288 Pnam := Make_Stream_Subprogram_Name (Loc, Typ, TSS_Stream_Read);
1289 Build_Record_Read_Write_Procedure (Loc, Typ, Decl, Pnam, Name_Read);
1290 end Build_Record_Read_Procedure;
1292 ---------------------------------------
1293 -- Build_Record_Read_Write_Procedure --
1294 ---------------------------------------
1296 -- The form of the record read/write procedure is as shown by the
1297 -- following example for a case with one discriminant case variant:
1299 -- procedure pnam (S : access RST, V : [out] Typ) is
1301 -- Component_Type'Read/Write (S, V.component);
1302 -- Component_Type'Read/Write (S, V.component);
1304 -- Component_Type'Read/Write (S, V.component);
1306 -- case V.discriminant is
1308 -- Component_Type'Read/Write (S, V.component);
1309 -- Component_Type'Read/Write (S, V.component);
1311 -- Component_Type'Read/Write (S, V.component);
1314 -- Component_Type'Read/Write (S, V.component);
1315 -- Component_Type'Read/Write (S, V.component);
1317 -- Component_Type'Read/Write (S, V.component);
1322 -- The out keyword for V is supplied in the Read case
1324 procedure Build_Record_Read_Write_Procedure
1335 In_Limited_Extension : Boolean := False;
1336 -- Set to True while processing the record extension definition
1337 -- for an extension of a limited type (for which an ancestor type
1338 -- has an explicit Nam attribute definition).
1340 function Make_Component_List_Attributes (CL : Node_Id) return List_Id;
1341 -- Returns a sequence of attributes to process the components that
1342 -- are referenced in the given component list.
1344 function Make_Field_Attribute (C : Entity_Id) return Node_Id;
1345 -- Given C, the entity for a discriminant or component, build
1346 -- an attribute for the corresponding field values.
1348 function Make_Field_Attributes (Clist : List_Id) return List_Id;
1349 -- Given Clist, a component items list, construct series of attributes
1350 -- for fieldwise processing of the corresponding components.
1352 ------------------------------------
1353 -- Make_Component_List_Attributes --
1354 ------------------------------------
1356 function Make_Component_List_Attributes (CL : Node_Id) return List_Id is
1357 CI : constant List_Id := Component_Items (CL);
1358 VP : constant Node_Id := Variant_Part (CL);
1368 Result := Make_Field_Attributes (CI);
1370 if Present (VP) then
1373 V := First_Non_Pragma (Variants (VP));
1374 while Present (V) loop
1377 DC := First (Discrete_Choices (V));
1378 while Present (DC) loop
1379 Append_To (DCH, New_Copy_Tree (DC));
1384 Make_Case_Statement_Alternative (Loc,
1385 Discrete_Choices => DCH,
1387 Make_Component_List_Attributes (Component_List (V))));
1388 Next_Non_Pragma (V);
1391 -- Note: in the following, we make sure that we use new occurrence
1392 -- of for the selector, since there are cases in which we make a
1393 -- reference to a hidden discriminant that is not visible.
1395 -- If the enclosing record is an unchecked_union, we use the
1396 -- default expressions for the discriminant (it must exist)
1397 -- because we cannot generate a reference to it, given that
1398 -- it is not stored..
1400 if Is_Unchecked_Union (Scope (Entity (Name (VP)))) then
1403 (Discriminant_Default_Value (Entity (Name (VP))));
1406 Make_Selected_Component (Loc,
1407 Prefix => Make_Identifier (Loc, Name_V),
1409 New_Occurrence_Of (Entity (Name (VP)), Loc));
1413 Make_Case_Statement (Loc,
1414 Expression => D_Ref,
1415 Alternatives => Alts));
1419 end Make_Component_List_Attributes;
1421 --------------------------
1422 -- Make_Field_Attribute --
1423 --------------------------
1425 function Make_Field_Attribute (C : Entity_Id) return Node_Id is
1426 Field_Typ : constant Entity_Id := Stream_Base_Type (Etype (C));
1428 TSS_Names : constant array (Name_Input .. Name_Write) of
1430 (Name_Read => TSS_Stream_Read,
1431 Name_Write => TSS_Stream_Write,
1432 Name_Input => TSS_Stream_Input,
1433 Name_Output => TSS_Stream_Output,
1434 others => TSS_Null);
1435 pragma Assert (TSS_Names (Nam) /= TSS_Null);
1438 if In_Limited_Extension
1439 and then Is_Limited_Type (Field_Typ)
1440 and then No (Find_Inherited_TSS (Field_Typ, TSS_Names (Nam)))
1442 -- The declaration is illegal per 13.13.2(9/1), and this is
1443 -- enforced in Exp_Ch3.Check_Stream_Attributes. Keep the caller
1444 -- happy by returning a null statement.
1446 return Make_Null_Statement (Loc);
1450 Make_Attribute_Reference (Loc,
1452 New_Occurrence_Of (Field_Typ, Loc),
1453 Attribute_Name => Nam,
1454 Expressions => New_List (
1455 Make_Identifier (Loc, Name_S),
1456 Make_Selected_Component (Loc,
1457 Prefix => Make_Identifier (Loc, Name_V),
1458 Selector_Name => New_Occurrence_Of (C, Loc))));
1459 end Make_Field_Attribute;
1461 ---------------------------
1462 -- Make_Field_Attributes --
1463 ---------------------------
1465 function Make_Field_Attributes (Clist : List_Id) return List_Id is
1472 if Present (Clist) then
1473 Item := First (Clist);
1475 -- Loop through components, skipping all internal components,
1476 -- which are not part of the value (e.g. _Tag), except that we
1477 -- don't skip the _Parent, since we do want to process that
1478 -- recursively. If _Parent is an interface type, being abstract
1479 -- with no components there is no need to handle it.
1481 while Present (Item) loop
1482 if Nkind (Item) = N_Component_Declaration
1484 ((Chars (Defining_Identifier (Item)) = Name_uParent
1485 and then not Is_Interface
1486 (Etype (Defining_Identifier (Item))))
1488 not Is_Internal_Name (Chars (Defining_Identifier (Item))))
1492 Make_Field_Attribute (Defining_Identifier (Item)));
1500 end Make_Field_Attributes;
1502 -- Start of processing for Build_Record_Read_Write_Procedure
1505 -- For the protected type case, use corresponding record
1507 if Is_Protected_Type (Typ) then
1508 Typt := Corresponding_Record_Type (Typ);
1513 -- Note that we do nothing with the discriminants, since Read and
1514 -- Write do not read or write the discriminant values. All handling
1515 -- of discriminants occurs in the Input and Output subprograms.
1517 Rdef := Type_Definition
1518 (Declaration_Node (Base_Type (Underlying_Type (Typt))));
1521 -- In record extension case, the fields we want, including the _Parent
1522 -- field representing the parent type, are to be found in the extension.
1523 -- Note that we will naturally process the _Parent field using the type
1524 -- of the parent, and hence its stream attributes, which is appropriate.
1526 if Nkind (Rdef) = N_Derived_Type_Definition then
1527 Rdef := Record_Extension_Part (Rdef);
1529 if Is_Limited_Type (Typt) then
1530 In_Limited_Extension := True;
1534 if Present (Component_List (Rdef)) then
1535 Append_List_To (Stms,
1536 Make_Component_List_Attributes (Component_List (Rdef)));
1539 Build_Stream_Procedure
1540 (Loc, Typ, Decl, Pnam, Stms, Nam = Name_Read);
1541 end Build_Record_Read_Write_Procedure;
1543 ----------------------------------
1544 -- Build_Record_Write_Procedure --
1545 ----------------------------------
1547 procedure Build_Record_Write_Procedure
1551 Pnam : out Entity_Id)
1554 Pnam := Make_Stream_Subprogram_Name (Loc, Typ, TSS_Stream_Write);
1555 Build_Record_Read_Write_Procedure (Loc, Typ, Decl, Pnam, Name_Write);
1556 end Build_Record_Write_Procedure;
1558 -------------------------------
1559 -- Build_Stream_Attr_Profile --
1560 -------------------------------
1562 function Build_Stream_Attr_Profile
1565 Nam : TSS_Name_Type) return List_Id
1570 -- (Ada 2005: AI-441): Set the null-excluding attribute because it has
1571 -- no semantic meaning in Ada 95 but it is a requirement in Ada2005.
1573 Profile := New_List (
1574 Make_Parameter_Specification (Loc,
1575 Defining_Identifier => Make_Defining_Identifier (Loc, Name_S),
1577 Make_Access_Definition (Loc,
1578 Null_Exclusion_Present => True,
1579 Subtype_Mark => New_Reference_To (
1580 Class_Wide_Type (RTE (RE_Root_Stream_Type)), Loc))));
1582 if Nam /= TSS_Stream_Input then
1584 Make_Parameter_Specification (Loc,
1585 Defining_Identifier => Make_Defining_Identifier (Loc, Name_V),
1586 Out_Present => (Nam = TSS_Stream_Read),
1587 Parameter_Type => New_Reference_To (Typ, Loc)));
1591 end Build_Stream_Attr_Profile;
1593 ---------------------------
1594 -- Build_Stream_Function --
1595 ---------------------------
1597 procedure Build_Stream_Function
1608 -- Construct function specification
1610 -- (Ada 2005: AI-441): Set the null-excluding attribute because it has
1611 -- no semantic meaning in Ada 95 but it is a requirement in Ada2005.
1614 Make_Function_Specification (Loc,
1615 Defining_Unit_Name => Fnam,
1617 Parameter_Specifications => New_List (
1618 Make_Parameter_Specification (Loc,
1619 Defining_Identifier => Make_Defining_Identifier (Loc, Name_S),
1621 Make_Access_Definition (Loc,
1622 Null_Exclusion_Present => True,
1623 Subtype_Mark => New_Reference_To (
1624 Class_Wide_Type (RTE (RE_Root_Stream_Type)), Loc)))),
1626 Result_Definition => New_Occurrence_Of (Typ, Loc));
1629 Make_Subprogram_Body (Loc,
1630 Specification => Spec,
1631 Declarations => Decls,
1632 Handled_Statement_Sequence =>
1633 Make_Handled_Sequence_Of_Statements (Loc,
1634 Statements => Stms));
1635 end Build_Stream_Function;
1637 ----------------------------
1638 -- Build_Stream_Procedure --
1639 ----------------------------
1641 procedure Build_Stream_Procedure
1652 -- Construct procedure specification
1654 -- (Ada 2005: AI-441): Set the null-excluding attribute because it has
1655 -- no semantic meaning in Ada 95 but it is a requirement in Ada2005.
1658 Make_Procedure_Specification (Loc,
1659 Defining_Unit_Name => Pnam,
1661 Parameter_Specifications => New_List (
1662 Make_Parameter_Specification (Loc,
1663 Defining_Identifier => Make_Defining_Identifier (Loc, Name_S),
1665 Make_Access_Definition (Loc,
1666 Null_Exclusion_Present => True,
1667 Subtype_Mark => New_Reference_To (
1668 Class_Wide_Type (RTE (RE_Root_Stream_Type)), Loc))),
1670 Make_Parameter_Specification (Loc,
1671 Defining_Identifier => Make_Defining_Identifier (Loc, Name_V),
1672 Out_Present => Outp,
1673 Parameter_Type => New_Occurrence_Of (Typ, Loc))));
1676 Make_Subprogram_Body (Loc,
1677 Specification => Spec,
1678 Declarations => Empty_List,
1679 Handled_Statement_Sequence =>
1680 Make_Handled_Sequence_Of_Statements (Loc,
1681 Statements => Stms));
1682 end Build_Stream_Procedure;
1684 -----------------------------
1685 -- Has_Stream_Standard_Rep --
1686 -----------------------------
1688 function Has_Stream_Standard_Rep (U_Type : Entity_Id) return Boolean is
1692 if Has_Non_Standard_Rep (U_Type) then
1696 if Has_Stream_Size_Clause (U_Type) then
1697 Siz := Static_Integer (Expression (Stream_Size_Clause (U_Type)));
1699 Siz := Esize (First_Subtype (U_Type));
1702 return Siz = Esize (Root_Type (U_Type));
1703 end Has_Stream_Standard_Rep;
1705 ---------------------------------
1706 -- Make_Stream_Subprogram_Name --
1707 ---------------------------------
1709 function Make_Stream_Subprogram_Name
1712 Nam : TSS_Name_Type) return Entity_Id
1717 -- For tagged types, we are dealing with a TSS associated with the
1718 -- declaration, so we use the standard primitive function name. For
1719 -- other types, generate a local TSS name since we are generating
1720 -- the subprogram at the point of use.
1722 if Is_Tagged_Type (Typ) then
1723 Sname := Make_TSS_Name (Typ, Nam);
1725 Sname := Make_TSS_Name_Local (Typ, Nam);
1728 return Make_Defining_Identifier (Loc, Sname);
1729 end Make_Stream_Subprogram_Name;
1731 ----------------------
1732 -- Stream_Base_Type --
1733 ----------------------
1735 function Stream_Base_Type (E : Entity_Id) return Entity_Id is
1737 if Is_Array_Type (E)
1738 and then Is_First_Subtype (E)
1742 return Base_Type (E);
1744 end Stream_Base_Type;