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with Natools.Storage_Pools;
generic
type T is range <>;
package Natools.S_Expressions.Templates.Generic_Integers is
pragma Preelaborate;
type Format is private;
function Render (Value : T; Template : Format) return Atom;
-- Render Value according to Template
procedure Parse
(Template : in out Format;
Expression : in out Lockable.Descriptor'Class);
-- Read Expression to fill Template
procedure Render
(Output : in out Ada.Streams.Root_Stream_Type'Class;
Template : in out Lockable.Descriptor'Class;
Value : in T);
-- Read a rendering format from Template and use it on Value
private
procedure Reverse_Render
(Value : in Natural_T;
Symbols : in Atom_Array;
Output : in out Atom_Buffers.Atom_Buffer;
Length : out Width)
with Pre => Symbols'Length >= 2 and Symbols'First = 0;
-- Create a little-endian image of Value using the given symbol table
type Format is record
Symbols : Atom_Arrays.Immutable_Reference;
Positive_Sign : Atom_Refs.Immutable_Reference;
Negative_Sign : Atom_Refs.Immutable_Reference;
Minimum_Width : Width := 0;
Align : Alignment := Right_Aligned;
Left_Padding : Atom_Refs.Immutable_Reference;
Right_Padding : Atom_Refs.Immutable_Reference;
Maximum_Width : Width := Width'Last;
Overflow_Message : Atom_Refs.Immutable_Reference;
end record;
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with Natools.Storage_Pools;
generic
type T is range <>;
package Natools.S_Expressions.Templates.Generic_Integers is
pragma Preelaborate;
--------------------------
-- High-Level Interface --
--------------------------
type Format is tagged private;
function Render (Value : T; Template : Format) return Atom;
-- Render Value according to Template
procedure Parse
(Template : in out Format;
Expression : in out Lockable.Descriptor'Class);
-- Read Expression to fill Template
procedure Render
(Output : in out Ada.Streams.Root_Stream_Type'Class;
Template : in out Lockable.Descriptor'Class;
Value : in T);
-- Read a rendering format from Template and use it on Value
---------------------
-- Auxiliary Types --
---------------------
type Alignment is (Left_Aligned, Centered, Right_Aligned);
type Width is range 0 .. 10000;
subtype Base_T is T'Base;
subtype Natural_T is Base_T range 0 .. Base_T'Last;
type Atom_Array
is array (Natural_T range <>) of Atom_Refs.Immutable_Reference;
function Create (Atom_List : in out S_Expressions.Descriptor'Class)
return Atom_Array;
-- Build an array consisting of consecutive atoms found in Atom_List
package Atom_Arrays is new References
(Atom_Array,
Storage_Pools.Access_In_Default_Pool'Storage_Pool,
Storage_Pools.Access_In_Default_Pool'Storage_Pool);
function Create (Atom_List : in out S_Expressions.Descriptor'Class)
return Atom_Arrays.Immutable_Reference;
-- Build an array reference consisting of
-- consecutive atoms found in Atom_List.
function Decimal return Atom_Arrays.Immutable_Reference
with Post => not Decimal'Result.Is_Empty;
-- Return a reference to usual decimal representation
---------------------
-- Format Mutators --
---------------------
procedure Set_Align (Object : in out Format; Value : in Alignment);
procedure Set_Left_Padding
(Object : in out Format;
Symbol : in Atom_Refs.Immutable_Reference);
procedure Set_Left_Padding
(Object : in out Format;
Symbol : in Atom);
procedure Set_Maximum_Width (Object : in out Format; Value : in Width);
procedure Set_Minimum_Width (Object : in out Format; Value : in Width);
procedure Set_Negative_Sign
(Object : in out Format;
Sign : in Atom_Refs.Immutable_Reference);
procedure Set_Negative_Sign
(Object : in out Format;
Sign : in Atom);
procedure Set_Overflow_Message
(Object : in out Format;
Message : in Atom_Refs.Immutable_Reference);
procedure Set_Overflow_Message
(Object : in out Format;
Message : in Atom);
procedure Set_Positive_Sign
(Object : in out Format;
Sign : in Atom_Refs.Immutable_Reference);
procedure Set_Positive_Sign
(Object : in out Format;
Sign : in Atom);
procedure Set_Right_Padding
(Object : in out Format;
Symbol : in Atom_Refs.Immutable_Reference);
procedure Set_Right_Padding
(Object : in out Format;
Symbol : in Atom);
procedure Set_Symbols
(Object : in out Format;
Symbols : in Atom_Arrays.Immutable_Reference);
procedure Set_Symbols
(Object : in out Format;
Expression : in out S_Expressions.Descriptor'Class);
private
Base_10 : Atom_Arrays.Immutable_Reference;
-- Cache for the often-used decimal representation
procedure Reverse_Render
(Value : in Natural_T;
Symbols : in Atom_Array;
Output : in out Atom_Buffers.Atom_Buffer;
Length : out Width)
with Pre => Symbols'Length >= 2 and Symbols'First = 0;
-- Create a little-endian image of Value using the given symbol table
type Format is tagged record
Symbols : Atom_Arrays.Immutable_Reference;
Positive_Sign : Atom_Refs.Immutable_Reference;
Negative_Sign : Atom_Refs.Immutable_Reference;
Minimum_Width : Width := 0;
Align : Alignment := Right_Aligned;
Left_Padding : Atom_Refs.Immutable_Reference;
Right_Padding : Atom_Refs.Immutable_Reference;
Maximum_Width : Width := Width'Last;
Overflow_Message : Atom_Refs.Immutable_Reference;
end record;
end Natools.S_Expressions.Templates.Generic_Integers;
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