| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- E X P _ I M G V -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2001-2004 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 2, 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 COPYING. If not, write -- |
| -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| with Atree; use Atree; |
| with Casing; use Casing; |
| with Checks; use Checks; |
| with Einfo; use Einfo; |
| with Exp_Util; use Exp_Util; |
| with Namet; use Namet; |
| with Nmake; use Nmake; |
| with Nlists; use Nlists; |
| with Opt; use Opt; |
| with Rtsfind; use Rtsfind; |
| with Sem_Res; use Sem_Res; |
| with Sinfo; use Sinfo; |
| with Snames; use Snames; |
| with Stand; use Stand; |
| with Stringt; use Stringt; |
| with Tbuild; use Tbuild; |
| with Ttypes; use Ttypes; |
| with Uintp; use Uintp; |
| |
| package body Exp_Imgv is |
| |
| ------------------------------------ |
| -- Build_Enumeration_Image_Tables -- |
| ------------------------------------ |
| |
| procedure Build_Enumeration_Image_Tables (E : Entity_Id; N : Node_Id) is |
| Loc : constant Source_Ptr := Sloc (E); |
| Str : String_Id; |
| Ind : List_Id; |
| Lit : Entity_Id; |
| Nlit : Nat; |
| Len : Nat; |
| Estr : Entity_Id; |
| Eind : Entity_Id; |
| Ityp : Node_Id; |
| |
| begin |
| -- Nothing to do for other than a root enumeration type |
| |
| if E /= Root_Type (E) then |
| return; |
| |
| -- Nothing to do if pragma Discard_Names applies |
| |
| elsif Discard_Names (E) then |
| return; |
| end if; |
| |
| -- Otherwise tables need constructing |
| |
| Start_String; |
| Ind := New_List; |
| Lit := First_Literal (E); |
| Len := 1; |
| Nlit := 0; |
| |
| loop |
| Append_To (Ind, |
| Make_Integer_Literal (Loc, UI_From_Int (Len))); |
| |
| exit when No (Lit); |
| Nlit := Nlit + 1; |
| |
| Get_Unqualified_Decoded_Name_String (Chars (Lit)); |
| |
| if Name_Buffer (1) /= ''' then |
| Set_Casing (All_Upper_Case); |
| end if; |
| |
| Store_String_Chars (Name_Buffer (1 .. Name_Len)); |
| Len := Len + Int (Name_Len); |
| Next_Literal (Lit); |
| end loop; |
| |
| if Len < Int (2 ** (8 - 1)) then |
| Ityp := Standard_Integer_8; |
| elsif Len < Int (2 ** (16 - 1)) then |
| Ityp := Standard_Integer_16; |
| else |
| Ityp := Standard_Integer_32; |
| end if; |
| |
| Str := End_String; |
| |
| Estr := |
| Make_Defining_Identifier (Loc, |
| Chars => New_External_Name (Chars (E), 'S')); |
| |
| Eind := |
| Make_Defining_Identifier (Loc, |
| Chars => New_External_Name (Chars (E), 'N')); |
| |
| Set_Lit_Strings (E, Estr); |
| Set_Lit_Indexes (E, Eind); |
| |
| Insert_Actions (N, |
| New_List ( |
| Make_Object_Declaration (Loc, |
| Defining_Identifier => Estr, |
| Constant_Present => True, |
| Object_Definition => |
| New_Occurrence_Of (Standard_String, Loc), |
| Expression => |
| Make_String_Literal (Loc, |
| Strval => Str)), |
| |
| Make_Object_Declaration (Loc, |
| Defining_Identifier => Eind, |
| Constant_Present => True, |
| |
| Object_Definition => |
| Make_Constrained_Array_Definition (Loc, |
| Discrete_Subtype_Definitions => New_List ( |
| Make_Range (Loc, |
| Low_Bound => Make_Integer_Literal (Loc, 0), |
| High_Bound => Make_Integer_Literal (Loc, Nlit))), |
| Component_Definition => |
| Make_Component_Definition (Loc, |
| Aliased_Present => False, |
| Subtype_Indication => New_Occurrence_Of (Ityp, Loc))), |
| |
| Expression => |
| Make_Aggregate (Loc, |
| Expressions => Ind))), |
| Suppress => All_Checks); |
| |
| end Build_Enumeration_Image_Tables; |
| |
| ---------------------------- |
| -- Expand_Image_Attribute -- |
| ---------------------------- |
| |
| -- For all non-enumeration types, and for enumeration types declared |
| -- in packages Standard or System, typ'Image (Val) expands into: |
| |
| -- Image_xx (tp (Expr) [, pm]) |
| |
| -- The name xx and type conversion tp (Expr) (called tv below) depend on |
| -- the root type of Expr. The argument pm is an extra type dependent |
| -- parameter only used in some cases as follows: |
| |
| -- For types whose root type is Character |
| -- xx = Character |
| -- tv = Character (Expr) |
| |
| -- For types whose root type is Boolean |
| -- xx = Boolean |
| -- tv = Boolean (Expr) |
| |
| -- For signed integer types with size <= Integer'Size |
| -- xx = Integer |
| -- tv = Integer (Expr) |
| |
| -- For other signed integer types |
| -- xx = Long_Long_Integer |
| -- tv = Long_Long_Integer (Expr) |
| |
| -- For modular types with modulus <= System.Unsigned_Types.Unsigned |
| -- xx = Unsigned |
| -- tv = System.Unsigned_Types.Unsigned (Expr) |
| |
| -- For other modular integer types |
| -- xx = Long_Long_Unsigned |
| -- tv = System.Unsigned_Types.Long_Long_Unsigned (Expr) |
| |
| -- For types whose root type is Wide_Character |
| -- xx = Wide_Character |
| -- tv = Wide_Character (Expr) |
| -- pm = Wide_Character_Encoding_Method |
| |
| -- For floating-point types |
| -- xx = Floating_Point |
| -- tv = Long_Long_Float (Expr) |
| -- pm = typ'Digits |
| |
| -- For ordinary fixed-point types |
| -- xx = Ordinary_Fixed_Point |
| -- tv = Long_Long_Float (Expr) |
| -- pm = typ'Aft |
| |
| -- For decimal fixed-point types with size = Integer'Size |
| -- xx = Decimal |
| -- tv = Integer (Expr) |
| -- pm = typ'Scale |
| |
| -- For decimal fixed-point types with size > Integer'Size |
| -- xx = Long_Long_Decimal |
| -- tv = Long_Long_Integer (Expr) |
| -- pm = typ'Scale |
| |
| -- Note: for the decimal fixed-point type cases, the conversion is |
| -- done literally without scaling (i.e. the actual expression that |
| -- is generated is Image_xx (tp?(Expr) [, pm]) |
| |
| -- For enumeration types other than those declared packages Standard |
| -- or System, typ'Image (X) expands into: |
| |
| -- Image_Enumeration_NN (typ'Pos (X), typS, typI'Address) |
| |
| -- where typS and typI are the entities constructed as described in |
| -- the spec for the procedure Build_Enumeration_Image_Tables and NN |
| -- is 32/16/8 depending on the element type of Lit_Indexes. |
| |
| procedure Expand_Image_Attribute (N : Node_Id) is |
| Loc : constant Source_Ptr := Sloc (N); |
| Exprs : constant List_Id := Expressions (N); |
| Pref : constant Node_Id := Prefix (N); |
| Ptyp : constant Entity_Id := Entity (Pref); |
| Rtyp : constant Entity_Id := Root_Type (Ptyp); |
| Expr : constant Node_Id := Relocate_Node (First (Exprs)); |
| Imid : RE_Id; |
| Tent : Entity_Id; |
| Arglist : List_Id; |
| Func : RE_Id; |
| Ttyp : Entity_Id; |
| Func_Ent : Entity_Id; |
| |
| begin |
| if Rtyp = Standard_Boolean then |
| Imid := RE_Image_Boolean; |
| Tent := Rtyp; |
| |
| elsif Rtyp = Standard_Character then |
| Imid := RE_Image_Character; |
| Tent := Rtyp; |
| |
| elsif Rtyp = Standard_Wide_Character then |
| Imid := RE_Image_Wide_Character; |
| Tent := Rtyp; |
| |
| elsif Is_Signed_Integer_Type (Rtyp) then |
| if Esize (Rtyp) <= Esize (Standard_Integer) then |
| Imid := RE_Image_Integer; |
| Tent := Standard_Integer; |
| else |
| Imid := RE_Image_Long_Long_Integer; |
| Tent := Standard_Long_Long_Integer; |
| end if; |
| |
| elsif Is_Modular_Integer_Type (Rtyp) then |
| if Modulus (Rtyp) <= Modulus (RTE (RE_Unsigned)) then |
| Imid := RE_Image_Unsigned; |
| Tent := RTE (RE_Unsigned); |
| else |
| Imid := RE_Image_Long_Long_Unsigned; |
| Tent := RTE (RE_Long_Long_Unsigned); |
| end if; |
| |
| elsif Is_Decimal_Fixed_Point_Type (Rtyp) then |
| if UI_To_Int (Esize (Rtyp)) <= Standard_Integer_Size then |
| Imid := RE_Image_Decimal; |
| Tent := Standard_Integer; |
| else |
| Imid := RE_Image_Long_Long_Decimal; |
| Tent := Standard_Long_Long_Integer; |
| end if; |
| |
| elsif Is_Ordinary_Fixed_Point_Type (Rtyp) then |
| Imid := RE_Image_Ordinary_Fixed_Point; |
| Tent := Standard_Long_Long_Float; |
| |
| elsif Is_Floating_Point_Type (Rtyp) then |
| Imid := RE_Image_Floating_Point; |
| Tent := Standard_Long_Long_Float; |
| |
| -- Only other possibility is user defined enumeration type |
| |
| else |
| if Discard_Names (First_Subtype (Ptyp)) |
| or else No (Lit_Strings (Root_Type (Ptyp))) |
| then |
| -- When pragma Discard_Names applies to the first subtype, |
| -- then build (Pref'Pos)'Img. |
| |
| Rewrite (N, |
| Make_Attribute_Reference (Loc, |
| Prefix => |
| Make_Attribute_Reference (Loc, |
| Prefix => Pref, |
| Attribute_Name => Name_Pos, |
| Expressions => New_List (Expr)), |
| Attribute_Name => |
| Name_Img)); |
| Analyze_And_Resolve (N, Standard_String); |
| |
| else |
| -- Here we get the Image of an enumeration type |
| |
| Ttyp := Component_Type (Etype (Lit_Indexes (Rtyp))); |
| |
| if Ttyp = Standard_Integer_8 then |
| Func := RE_Image_Enumeration_8; |
| elsif Ttyp = Standard_Integer_16 then |
| Func := RE_Image_Enumeration_16; |
| else |
| Func := RE_Image_Enumeration_32; |
| end if; |
| |
| -- Apply a validity check, since it is a bit drastic to |
| -- get a completely junk image value for an invalid value. |
| |
| if not Expr_Known_Valid (Expr) then |
| Insert_Valid_Check (Expr); |
| end if; |
| |
| Rewrite (N, |
| Make_Function_Call (Loc, |
| Name => New_Occurrence_Of (RTE (Func), Loc), |
| Parameter_Associations => New_List ( |
| Make_Attribute_Reference (Loc, |
| Attribute_Name => Name_Pos, |
| Prefix => New_Occurrence_Of (Ptyp, Loc), |
| Expressions => New_List (Expr)), |
| New_Occurrence_Of (Lit_Strings (Rtyp), Loc), |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Occurrence_Of (Lit_Indexes (Rtyp), Loc), |
| Attribute_Name => Name_Address)))); |
| |
| Analyze_And_Resolve (N, Standard_String); |
| end if; |
| |
| return; |
| end if; |
| |
| -- If we fall through, we have one of the cases that is handled by |
| -- calling one of the System.Img_xx routines and Imid is set to the |
| -- RE_Id for the function to be called. |
| |
| Func_Ent := RTE (Imid); |
| |
| -- If the function entity is empty, that means we have a case in |
| -- no run time mode where the operation is not allowed, and an |
| -- appropriate diagnostic has already been issued. |
| |
| if No (Func_Ent) then |
| return; |
| end if; |
| |
| -- Otherwise prepare arguments for run-time call |
| |
| Arglist := New_List (Convert_To (Tent, Relocate_Node (Expr))); |
| |
| -- For floating-point types, append Digits argument |
| |
| if Is_Floating_Point_Type (Rtyp) then |
| Append_To (Arglist, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_Digits)); |
| |
| -- For ordinary fixed-point types, append Aft parameter |
| |
| elsif Is_Ordinary_Fixed_Point_Type (Rtyp) then |
| Append_To (Arglist, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_Aft)); |
| |
| -- For wide character, append encoding method |
| |
| elsif Rtyp = Standard_Wide_Character then |
| Append_To (Arglist, |
| Make_Integer_Literal (Loc, |
| Intval => Int (Wide_Character_Encoding_Method))); |
| |
| -- For decimal, append Scale and also set to do literal conversion |
| |
| elsif Is_Decimal_Fixed_Point_Type (Rtyp) then |
| Append_To (Arglist, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_Scale)); |
| |
| Set_Conversion_OK (First (Arglist)); |
| Set_Etype (First (Arglist), Tent); |
| end if; |
| |
| Rewrite (N, |
| Make_Function_Call (Loc, |
| Name => New_Reference_To (Func_Ent, Loc), |
| Parameter_Associations => Arglist)); |
| |
| Analyze_And_Resolve (N, Standard_String); |
| end Expand_Image_Attribute; |
| |
| ---------------------------- |
| -- Expand_Value_Attribute -- |
| ---------------------------- |
| |
| -- For scalar types derived from Boolean, Character and integer types |
| -- in package Standard, typ'Value (X) expands into: |
| |
| -- btyp (Value_xx (X)) |
| |
| -- where btyp is he base type of the prefix, and |
| |
| -- For types whose root type is Character |
| -- xx = Character |
| |
| -- For types whose root type is Boolean |
| -- xx = Boolean |
| |
| -- For signed integer types with size <= Integer'Size |
| -- xx = Integer |
| |
| -- For other signed integer types |
| -- xx = Long_Long_Integer |
| |
| -- For modular types with modulus <= System.Unsigned_Types.Unsigned |
| -- xx = Unsigned |
| |
| -- For other modular integer types |
| -- xx = Long_Long_Unsigned |
| |
| -- For floating-point types and ordinary fixed-point types |
| -- xx = Real |
| |
| -- For types derived from Wide_Character, typ'Value (X) expands into |
| |
| -- Value_Wide_Character (X, Wide_Character_Encoding_Method) |
| |
| -- For decimal types with size <= Integer'Size, typ'Value (X) |
| -- expands into |
| |
| -- btyp?(Value_Decimal (X, typ'Scale)); |
| |
| -- For all other decimal types, typ'Value (X) expands into |
| |
| -- btyp?(Value_Long_Long_Decimal (X, typ'Scale)) |
| |
| -- For enumeration types other than those derived from types Boolean, |
| -- Character, and Wide_Character in Standard, typ'Value (X) expands to: |
| |
| -- Enum'Val (Value_Enumeration_NN (typS, typI'Address, Num, X)) |
| |
| -- where typS and typI and the Lit_Strings and Lit_Indexes entities |
| -- from T's root type entitym and Num is Enum'Pos (Enum'Last). The |
| -- Value_Enumeration_NN function will search the tables looking for |
| -- X and return the position number in the table if found which is |
| -- used to provide the result of 'Value (using Enum'Val). If the |
| -- value is not found Constraint_Error is raised. The suffix _NN |
| -- depends on the element type of typI. |
| |
| procedure Expand_Value_Attribute (N : Node_Id) is |
| Loc : constant Source_Ptr := Sloc (N); |
| Typ : constant Entity_Id := Etype (N); |
| Btyp : constant Entity_Id := Base_Type (Typ); |
| Rtyp : constant Entity_Id := Root_Type (Typ); |
| Exprs : constant List_Id := Expressions (N); |
| Vid : RE_Id; |
| Args : List_Id; |
| Func : RE_Id; |
| Ttyp : Entity_Id; |
| |
| begin |
| Args := Exprs; |
| |
| if Rtyp = Standard_Character then |
| Vid := RE_Value_Character; |
| |
| elsif Rtyp = Standard_Boolean then |
| Vid := RE_Value_Boolean; |
| |
| elsif Rtyp = Standard_Wide_Character then |
| Vid := RE_Value_Wide_Character; |
| Append_To (Args, |
| Make_Integer_Literal (Loc, |
| Intval => Int (Wide_Character_Encoding_Method))); |
| |
| elsif Rtyp = Base_Type (Standard_Short_Short_Integer) |
| or else Rtyp = Base_Type (Standard_Short_Integer) |
| or else Rtyp = Base_Type (Standard_Integer) |
| then |
| Vid := RE_Value_Integer; |
| |
| elsif Is_Signed_Integer_Type (Rtyp) then |
| Vid := RE_Value_Long_Long_Integer; |
| |
| elsif Is_Modular_Integer_Type (Rtyp) then |
| if Modulus (Rtyp) <= Modulus (RTE (RE_Unsigned)) then |
| Vid := RE_Value_Unsigned; |
| else |
| Vid := RE_Value_Long_Long_Unsigned; |
| end if; |
| |
| elsif Is_Decimal_Fixed_Point_Type (Rtyp) then |
| if UI_To_Int (Esize (Rtyp)) <= Standard_Integer_Size then |
| Vid := RE_Value_Decimal; |
| else |
| Vid := RE_Value_Long_Long_Decimal; |
| end if; |
| |
| Append_To (Args, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Typ, Loc), |
| Attribute_Name => Name_Scale)); |
| |
| Rewrite (N, |
| OK_Convert_To (Btyp, |
| Make_Function_Call (Loc, |
| Name => New_Reference_To (RTE (Vid), Loc), |
| Parameter_Associations => Args))); |
| |
| Set_Etype (N, Btyp); |
| Analyze_And_Resolve (N, Btyp); |
| return; |
| |
| elsif Is_Real_Type (Rtyp) then |
| Vid := RE_Value_Real; |
| |
| -- Only other possibility is user defined enumeration type |
| |
| else |
| pragma Assert (Is_Enumeration_Type (Rtyp)); |
| |
| -- Case of pragma Discard_Names, transform the Value |
| -- attribute to Btyp'Val (Long_Long_Integer'Value (Args)) |
| |
| if Discard_Names (First_Subtype (Typ)) |
| or else No (Lit_Strings (Rtyp)) |
| then |
| Rewrite (N, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Btyp, Loc), |
| Attribute_Name => Name_Val, |
| Expressions => New_List ( |
| Make_Attribute_Reference (Loc, |
| Prefix => |
| New_Occurrence_Of (Standard_Long_Long_Integer, Loc), |
| Attribute_Name => Name_Value, |
| Expressions => Args)))); |
| |
| Analyze_And_Resolve (N, Btyp); |
| |
| -- Here for normal case where we have enumeration tables, this |
| -- is where we build |
| |
| -- T'Val (Value_Enumeration_NN (typS, typI'Address, Num, X)) |
| |
| else |
| Ttyp := Component_Type (Etype (Lit_Indexes (Rtyp))); |
| |
| if Ttyp = Standard_Integer_8 then |
| Func := RE_Value_Enumeration_8; |
| elsif Ttyp = Standard_Integer_16 then |
| Func := RE_Value_Enumeration_16; |
| else |
| Func := RE_Value_Enumeration_32; |
| end if; |
| |
| Prepend_To (Args, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Occurrence_Of (Rtyp, Loc), |
| Attribute_Name => Name_Pos, |
| Expressions => New_List ( |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Occurrence_Of (Rtyp, Loc), |
| Attribute_Name => Name_Last)))); |
| |
| Prepend_To (Args, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Occurrence_Of (Lit_Indexes (Rtyp), Loc), |
| Attribute_Name => Name_Address)); |
| |
| Prepend_To (Args, |
| New_Occurrence_Of (Lit_Strings (Rtyp), Loc)); |
| |
| Rewrite (N, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Typ, Loc), |
| Attribute_Name => Name_Val, |
| Expressions => New_List ( |
| Make_Function_Call (Loc, |
| Name => |
| New_Reference_To (RTE (Func), Loc), |
| Parameter_Associations => Args)))); |
| |
| Analyze_And_Resolve (N, Btyp); |
| end if; |
| |
| return; |
| end if; |
| |
| -- Fall through for all cases except user defined enumeration type |
| -- and decimal types, with Vid set to the Id of the entity for the |
| -- Value routine and Args set to the list of parameters for the call. |
| |
| Rewrite (N, |
| Convert_To (Btyp, |
| Make_Function_Call (Loc, |
| Name => New_Reference_To (RTE (Vid), Loc), |
| Parameter_Associations => Args))); |
| |
| Analyze_And_Resolve (N, Btyp); |
| end Expand_Value_Attribute; |
| |
| ---------------------------- |
| -- Expand_Width_Attribute -- |
| ---------------------------- |
| |
| -- The processing here also handles the case of Wide_Width. With the |
| -- exceptions noted, the processing is identical |
| |
| -- For scalar types derived from Boolean, character and integer types |
| -- in package Standard. Note that the Width attribute is computed at |
| -- compile time for all cases except those involving non-static sub- |
| -- types. For such subtypes, typ'Width and typ'Wide_Width expands into: |
| |
| -- Result_Type (xx (yy (Ptyp'First), yy (Ptyp'Last))) |
| |
| -- where |
| |
| -- For types whose root type is Character |
| -- xx = Width_Character (Wide_Width_Character for Wide_Width case) |
| -- yy = Character |
| |
| -- For types whose root type is Boolean |
| -- xx = Width_Boolean |
| -- yy = Boolean |
| |
| -- For signed integer types |
| -- xx = Width_Long_Long_Integer |
| -- yy = Long_Long_Integer |
| |
| -- For modular integer types |
| -- xx = Width_Long_Long_Unsigned |
| -- yy = Long_Long_Unsigned |
| |
| -- For types derived from Wide_Character, typ'Width expands into |
| |
| -- Result_Type (Width_Wide_Character ( |
| -- Wide_Character (typ'First), |
| -- Wide_Character (typ'Last), |
| -- Wide_Character_Encoding_Method); |
| |
| -- and typ'Wide_Width expands into: |
| |
| -- Result_Type (Wide_Width_Wide_Character ( |
| -- Wide_Character (typ'First), |
| -- Wide_Character (typ'Last)); |
| |
| -- For real types, typ'Width and typ'Wide_Width expand into |
| |
| -- if Ptyp'First > Ptyp'Last then 0 else btyp'Width end if |
| |
| -- where btyp is the base type. This looks recursive but it isn't |
| -- because the base type is always static, and hence the expression |
| -- in the else is reduced to an integer literal. |
| |
| -- For user defined enumeration types, typ'Width expands into |
| |
| -- Result_Type (Width_Enumeration_NN |
| -- (typS, |
| -- typI'Address, |
| -- typ'Pos (typ'First), |
| -- typ'Pos (Typ'Last))); |
| |
| -- and typ'Wide_Width expands into: |
| |
| -- Result_Type (Wide_Width_Enumeration_NN |
| -- (typS, |
| -- typI, |
| -- typ'Pos (typ'First), |
| -- typ'Pos (Typ'Last)) |
| -- Wide_Character_Encoding_Method); |
| |
| -- where typS and typI are the enumeration image strings and |
| -- indexes table, as described in Build_Enumeration_Image_Tables. |
| -- NN is 8/16/32 for depending on the element type for typI. |
| |
| procedure Expand_Width_Attribute (N : Node_Id; Wide : Boolean) is |
| Loc : constant Source_Ptr := Sloc (N); |
| Typ : constant Entity_Id := Etype (N); |
| Pref : constant Node_Id := Prefix (N); |
| Ptyp : constant Entity_Id := Etype (Pref); |
| Rtyp : constant Entity_Id := Root_Type (Ptyp); |
| XX : RE_Id; |
| YY : Entity_Id; |
| Arglist : List_Id; |
| Ttyp : Entity_Id; |
| |
| begin |
| -- Types derived from Standard.Boolean |
| |
| if Rtyp = Standard_Boolean then |
| XX := RE_Width_Boolean; |
| YY := Rtyp; |
| |
| -- Types derived from Standard.Character |
| |
| elsif Rtyp = Standard_Character then |
| if not Wide then |
| XX := RE_Width_Character; |
| else |
| XX := RE_Wide_Width_Character; |
| end if; |
| |
| YY := Rtyp; |
| |
| -- Types derived from Standard.Wide_Character |
| |
| elsif Rtyp = Standard_Wide_Character then |
| if not Wide then |
| XX := RE_Width_Wide_Character; |
| else |
| XX := RE_Wide_Width_Wide_Character; |
| end if; |
| |
| YY := Rtyp; |
| |
| -- Signed integer types |
| |
| elsif Is_Signed_Integer_Type (Rtyp) then |
| XX := RE_Width_Long_Long_Integer; |
| YY := Standard_Long_Long_Integer; |
| |
| -- Modular integer types |
| |
| elsif Is_Modular_Integer_Type (Rtyp) then |
| XX := RE_Width_Long_Long_Unsigned; |
| YY := RTE (RE_Long_Long_Unsigned); |
| |
| -- Real types |
| |
| elsif Is_Real_Type (Rtyp) then |
| |
| Rewrite (N, |
| Make_Conditional_Expression (Loc, |
| Expressions => New_List ( |
| |
| Make_Op_Gt (Loc, |
| Left_Opnd => |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_First), |
| |
| Right_Opnd => |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_Last)), |
| |
| Make_Integer_Literal (Loc, 0), |
| |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Base_Type (Ptyp), Loc), |
| Attribute_Name => Name_Width)))); |
| |
| Analyze_And_Resolve (N, Typ); |
| return; |
| |
| -- User defined enumeration types |
| |
| else |
| pragma Assert (Is_Enumeration_Type (Rtyp)); |
| |
| Ttyp := Component_Type (Etype (Lit_Indexes (Rtyp))); |
| |
| if not Wide then |
| if Ttyp = Standard_Integer_8 then |
| XX := RE_Width_Enumeration_8; |
| elsif Ttyp = Standard_Integer_16 then |
| XX := RE_Width_Enumeration_16; |
| else |
| XX := RE_Width_Enumeration_32; |
| end if; |
| |
| else |
| if Ttyp = Standard_Integer_8 then |
| XX := RE_Wide_Width_Enumeration_8; |
| elsif Ttyp = Standard_Integer_16 then |
| XX := RE_Wide_Width_Enumeration_16; |
| else |
| XX := RE_Wide_Width_Enumeration_32; |
| end if; |
| end if; |
| |
| Arglist := |
| New_List ( |
| New_Occurrence_Of (Lit_Strings (Rtyp), Loc), |
| |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Occurrence_Of (Lit_Indexes (Rtyp), Loc), |
| Attribute_Name => Name_Address), |
| |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_Pos, |
| |
| Expressions => New_List ( |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_First))), |
| |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_Pos, |
| |
| Expressions => New_List ( |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_Last)))); |
| |
| -- For enumeration'Wide_Width, add encoding method parameter |
| |
| if Wide then |
| Append_To (Arglist, |
| Make_Integer_Literal (Loc, |
| Intval => Int (Wide_Character_Encoding_Method))); |
| end if; |
| |
| Rewrite (N, |
| Convert_To (Typ, |
| Make_Function_Call (Loc, |
| Name => New_Reference_To (RTE (XX), Loc), |
| Parameter_Associations => Arglist))); |
| |
| Analyze_And_Resolve (N, Typ); |
| return; |
| end if; |
| |
| -- If we fall through XX and YY are set |
| |
| Arglist := New_List ( |
| Convert_To (YY, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_First)), |
| |
| Convert_To (YY, |
| Make_Attribute_Reference (Loc, |
| Prefix => New_Reference_To (Ptyp, Loc), |
| Attribute_Name => Name_Last))); |
| |
| -- For Wide_Character'Width, add encoding method parameter |
| |
| if Rtyp = Standard_Wide_Character and then Wide then |
| Append_To (Arglist, |
| Make_Integer_Literal (Loc, |
| Intval => Int (Wide_Character_Encoding_Method))); |
| end if; |
| |
| Rewrite (N, |
| Convert_To (Typ, |
| Make_Function_Call (Loc, |
| Name => New_Reference_To (RTE (XX), Loc), |
| Parameter_Associations => Arglist))); |
| |
| Analyze_And_Resolve (N, Typ); |
| end Expand_Width_Attribute; |
| |
| end Exp_Imgv; |
