with Unchecked_Conversion;
package body System.Wid_Enum is
function Width_Enumeration_8
(Names : String;
Indexes : System.Address;
Lo, Hi : Natural)
return Natural
is
pragma Warnings (Off, Names);
W : Natural;
type Natural_8 is range 0 .. 2 ** 7 - 1;
type Index_Table is array (Natural) of Natural_8;
type Index_Table_Ptr is access Index_Table;
function To_Index_Table_Ptr is
new Unchecked_Conversion (System.Address, Index_Table_Ptr);
IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
begin
W := 0;
for J in Lo .. Hi loop
W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J)));
end loop;
return W;
end Width_Enumeration_8;
function Width_Enumeration_16
(Names : String;
Indexes : System.Address;
Lo, Hi : Natural)
return Natural
is
pragma Warnings (Off, Names);
W : Natural;
type Natural_16 is range 0 .. 2 ** 15 - 1;
type Index_Table is array (Natural) of Natural_16;
type Index_Table_Ptr is access Index_Table;
function To_Index_Table_Ptr is
new Unchecked_Conversion (System.Address, Index_Table_Ptr);
IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
begin
W := 0;
for J in Lo .. Hi loop
W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J)));
end loop;
return W;
end Width_Enumeration_16;
function Width_Enumeration_32
(Names : String;
Indexes : System.Address;
Lo, Hi : Natural)
return Natural
is
pragma Warnings (Off, Names);
W : Natural;
type Natural_32 is range 0 .. 2 ** 31 - 1;
type Index_Table is array (Natural) of Natural_32;
type Index_Table_Ptr is access Index_Table;
function To_Index_Table_Ptr is
new Unchecked_Conversion (System.Address, Index_Table_Ptr);
IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
begin
W := 0;
for J in Lo .. Hi loop
W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J)));
end loop;
return W;
end Width_Enumeration_32;
end System.Wid_Enum;