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DataMuseum.dkPresents historical artifacts from the history of: Rational R1000/400 |
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Length: 14336 (0x3800)
Types: Ada Source
Notes: 03_class, FILE, R1k_Segment, e3_tag, package body Context, seg_0112a4, seg_01156d
└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
└─ ⟦5a81ac88f⟧ »Space Info Vol 1«
└─⟦this⟧
package body Context is
type Name_Pointer is access String;
Null_Name : constant Name_Pointer := null;
type Rule_Structure is
record
Name : Name_Pointer;
State : Boolean;
end record;
subtype Rule_Index is Rule_Id range 1 .. Max_Rule;
type Rule_State_Array is array (Rule_Index) of Rule_Structure;
type Context_Structure is
record
Name : Name_Pointer;
Rule_States : Rule_State_Array;
end record;
subtype Context_Index is Reference range 1 .. Max_Context;
type Contextes is array (Context_Index) of Context_Structure;
The_Contextes : Contextes :=
(others => (Name => Null_Name,
Rule_States => (others =>
(Name => Null_Name, State => False))));
Last_Reference : Context.Reference := 0;
Unknown_Context : constant String := "CONTEXT_INCONNU";
------------------------------------------------------------------------------
function Create (With_Name : String) return Context.Reference is
The_Reference : Context.Reference := Context.Null_Reference;
begin
Context.Last_Reference := Context.Last_Reference + 1;
The_Contextes (Last_Reference).Name := new String'(With_Name);
The_Reference := Last_Reference;
return The_Reference;
exception
when Constraint_Error =>
raise Context.Overflow;
end Create;
------------------------------------------------------------------------------
function Value (Of_Name : String) return Context.Reference is
The_Reference : Context.Reference := Context.Null_Reference;
begin
for I in 1 .. Context.Last_Reference loop
if The_Contextes (I).Name.all = Of_Name then
The_Reference := I;
exit;
end if;
end loop;
return The_Reference;
end Value;
------------------------------------------------------------------------------
function Image (Of_Reference : Context.Reference) return String is
begin
if Of_Reference <= Context.Last_Reference and
Of_Reference <= Max_Context and
Of_Reference > Context.Null_Reference then
return The_Contextes (Of_Reference).Name.all;
else
return Unknown_Context;
-- raise Context.Illegal_Access; --[???]
end if;
exception
when Constraint_Error =>
raise Context.Illegal_Access;
end Image;
------------------------------------------------------------------------------
procedure Add (In_Context : String;
The_Rule : Context.Rule_Id;
With_Name : String) is
The_Context : Context.Reference :=
Context.Value (Of_Name => In_Context);
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if The_Context = Context.Null_Reference or
The_Context > Max_Context then
raise Bad_Context;
end if;
The_Contextes (The_Context).Rule_States (The_Rule).Name :=
new String'(With_Name);
The_Contextes (The_Context).Rule_States (The_Rule).State := False;
end Add;
------------------------------------------------------------------------------
procedure Add (In_Context : Context.Reference;
The_Rule : Context.Rule_Id;
With_Name : String) is
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if In_Context = Context.Null_Reference or In_Context > Max_Context then
raise Bad_Context;
end if;
The_Contextes (In_Context).Rule_States (The_Rule).Name :=
new String'(With_Name);
The_Contextes (In_Context).Rule_States (The_Rule).State := False;
end Add;
------------------------------------------------------------------------------
function Get (In_Context : String; The_Rule : Context.Rule_Id)
return String is
The_Context : Context.Reference :=
Context.Value (Of_Name => In_Context);
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if The_Context = Context.Null_Reference or
The_Context > Max_Context then
raise Bad_Context;
end if;
return (The_Contextes (The_Context).Rule_States (The_Rule).Name.all);
end Get;
------------------------------------------------------------------------------
function Get (In_Context : Context.Reference; The_Rule : Context.Rule_Id)
return String is
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if In_Context = Context.Null_Reference or In_Context > Max_Context then
raise Bad_Context;
end if;
return (The_Contextes (In_Context).Rule_States (The_Rule).Name.all);
end Get;
------------------------------------------------------------------------------
function Is_Masked (In_Context : String; The_Rule : Context.Rule_Id)
return Boolean is
The_Context : Context.Reference :=
Context.Value (Of_Name => In_Context);
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if The_Context = Context.Null_Reference or
The_Context > Max_Context then
raise Bad_Context;
end if;
return (The_Contextes (The_Context).Rule_States (The_Rule).State);
end Is_Masked;
------------------------------------------------------------------------------
function Is_Masked
(In_Context : Context.Reference; The_Rule : Context.Rule_Id)
return Boolean is
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if In_Context = Context.Null_Reference or In_Context > Max_Context then
raise Bad_Context;
end if;
return (The_Contextes (In_Context).Rule_States (The_Rule).State);
end Is_Masked;
------------------------------------------------------------------------------
procedure Mask (In_Context : String; The_Rule : Context.Rule_Id) is
The_Context : Context.Reference :=
Context.Value (Of_Name => In_Context);
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if The_Context = Context.Null_Reference or
The_Context > Max_Context then
raise Bad_Context;
end if;
The_Contextes (The_Context).Rule_States (The_Rule).State := True;
end Mask;
------------------------------------------------------------------------------
procedure Mask (In_Context : Context.Reference;
The_Rule : Context.Rule_Id) is
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if In_Context = Context.Null_Reference or In_Context > Max_Context then
raise Bad_Context;
end if;
The_Contextes (In_Context).Rule_States (The_Rule).State := True;
end Mask;
------------------------------------------------------------------------------
procedure Unmask (In_Context : String; The_Rule : Context.Rule_Id) is
The_Context : Context.Reference :=
Context.Value (Of_Name => In_Context);
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if The_Context = Context.Null_Reference or
The_Context > Max_Context then
raise Bad_Context;
end if;
The_Contextes (The_Context).Rule_States (The_Rule).State := False;
end Unmask;
------------------------------------------------------------------------------
procedure Unmask (In_Context : Context.Reference;
The_Rule : Context.Rule_Id) is
begin
if The_Rule = Context.Null_Rule or The_Rule > Max_Rule then
raise Bad_Rule;
end if;
if In_Context = Context.Null_Reference or In_Context > Max_Context then
raise Bad_Context;
end if;
The_Contextes (In_Context).Rule_States (The_Rule).State := False;
end Unmask;
--============================================================================
begin
Context.Last_Reference := 0;
for I in Context_Index loop
The_Contextes (I).Name := Null_Name;
for J in Rule_Index loop
The_Contextes (I).Rule_States (J).Name := Null_Name;
The_Contextes (I).Rule_States (J).State := False;
end loop;
end loop;
end Context;
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