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⟦29773540a⟧ Ada Source

    Length: 11264 (0x2c00)
    Types: Ada Source
    Notes: 03_class, FILE, R1k_Segment, e3_tag, package body Cl35, seg_040ce9

Derivation

└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
    └─ ⟦5a81ac88f⟧ »Space Info Vol 1« 
        └─⟦this⟧ 

with Byte_Utility;
with Conversion;
with System;  
with Text_Io;
package body Cl35 is

    use Byte_Utility;

    Adresse_Invalide : exception;
    Commande_Inconnue : exception;
    Trame_Incompatible : exception;

--**** *********************************************************************

    function Coder_Entete_Trame return System.Byte_String is
    begin
        return Code_Entete;
    end Coder_Entete_Trame;

--***************************************************************************

    function Coder_Adresse_Trame
                (Un_Numero_Lecteur : Integer) return System.Byte_String is
    begin  
        if ((Un_Numero_Lecteur < Adresse_Min) and
            (Un_Numero_Lecteur < Adresse_Max)) then
            raise Adresse_Invalide;
        end if;

        return (Conversion.Integer_Byte_String
                   (Un_Numero_Lecteur, Taille_Adresse));

    end Coder_Adresse_Trame;

--***************************************************************************

    function Coder_Controle_Trame
                (La_Taille : Integer) return System.Byte_String is
    begin
        return (Conversion.Integer_Byte_String (La_Taille, Taille_Controle));
    end Coder_Controle_Trame;

--***************************************************************************

    function Coder_Commande_Trame (Une_Commande_Lecteur : Message.Commande)
                                  return System.Byte_String is
    begin
        case Une_Commande_Lecteur is
            when Message.Rapport_Horloge =>
                return (Code_Rapport_Horloge);
            when Message.Rapport_Site =>
                return (Code_Rapport_Site);
            when others =>
                null;
        end case;

    end Coder_Commande_Trame;

--***************************************************************************


    function Coder_Donnees_Trame
                (Des_Donnees : Integer) return System.Byte_String is
    begin
        return (1 => Conversion.Integer_Byte (Des_Donnees));
    end Coder_Donnees_Trame;

--***************************************************************************

    function Coder_Fin_Trame return System.Byte_String is
    begin
        return Code_Fin;
    end Coder_Fin_Trame;

--***************************************************************************

    function Coder_Message (Le_Message : Message.Objet)
                           return System.Byte_String is
        Chaine : Byte_String;
    begin

        Chaine := new System.Byte_String'
                         (Coder_Commande_Trame
                             (Message.Donner_La_Commande (Le_Message)));

        return (Coder_Entete_Trame &
                Coder_Adresse_Trame (Message.Donner_No_Lecteur (Le_Message)) &
                Coder_Controle_Trame (Chaine'Length) &
                Chaine.all & Coder_Fin_Trame);

    end Coder_Message;

--***************************************************************************

    procedure Decoder_Entete_Trame (La_Trame : System.Byte_String) is

    begin

        if not Compare (Code_Entete, La_Trame) then
            raise Trame_Incompatible;
        end if;


    end Decoder_Entete_Trame;

--***************************************************************************

    function Decoder_Adresse_Trame
                (La_Trame : in System.Byte_String) return Integer is
        L_Adresse : Integer;
    begin  
        L_Adresse := Conversion.Byte_String_Integer (La_Trame);

        if ((L_Adresse < Adresse_Min) and (L_Adresse < Adresse_Max)) then
            raise Adresse_Invalide;
        end if;

        return (L_Adresse);

    end Decoder_Adresse_Trame;

--***************************************************************************
    function Decoder_Controle_Trame
                (La_Trame : in System.Byte_String) return Integer is

    begin

        return (Conversion.Byte_String_Integer (La_Trame));

    end Decoder_Controle_Trame;

--***************************************************************************
    function Decoder_Commande_Trame
                (La_Trame : in System.Byte_String) return Message.Commande is


    begin

        if Compare (Code_Rapport_Site, La_Trame) then
            return (Message.Rapport_Site);
        end if;

        if Compare (Code_Rapport_Horloge, La_Trame) then
            return (Message.Rapport_Horloge);
        end if;

        if Compare (Code_Ack, La_Trame) then
            return (Message.Rapport_Site);
        end if;

        return (Message.Unknown);

    end Decoder_Commande_Trame;

--****************************************************************************

    procedure Decoder_Fin_Trame (La_Trame : System.Byte_String) is

    begin

        if not Compare (Code_Fin, La_Trame) then
            raise Trame_Incompatible;
        end if;


    end Decoder_Fin_Trame;

--****************************************************************************

    function Decoder_Donnees_Trame
                (La_Trame : System.Byte_String) return Integer is

    begin
        return (0);
    end Decoder_Donnees_Trame;

--****************************************************************************

    function Decoder_Message
                (La_Trame : System.Byte_String) return Message.Objet is

        Le_Msg : Message.Objet;

        Index : Integer := 0;
        Le_Controle : Integer;

    begin

        Decoder_Entete_Trame (Extraire (La_Trame, Index, Taille_Entete));



        Index := Index + Taille_Entete;

        Message.Entrer_No_Lecteur
           (Decoder_Adresse_Trame (Extraire (La_Trame, Index, Taille_Adresse)),
            Le_Msg);



        Index := Index + Taille_Adresse;

        Le_Controle := Decoder_Controle_Trame
                          (Extraire (La_Trame, Index, Taille_Controle)) - 1;



        Index := Index + Taille_Controle;

        Message.Entrer_La_Commande
           (Decoder_Commande_Trame
               (Extraire (La_Trame, Index, Taille_Commande)), Le_Msg);




        Index := Index + Taille_Commande;


        --     if (Le_Controle > 2) then
        --
        --         Message.Entrer_Les_Donnees
        --            (Decoder_Donnees_Trame
        --                (Extraire (La_Trame, Index, Le_Controle - Taille_Commande)),
        --             Le_Msg);
        --
        --         Index := Index + Le_Controle - Taille_Commande;
        --
        --     end if;
        --
        --

        Decoder_Fin_Trame (Extraire (La_Trame, Index, Taille_Fin));




        Message.Entrer_Le_Lecteur (Message.Cl35, Le_Msg);

        return (Le_Msg);

    end Decoder_Message;

--****************************************************************************

end Cl35;

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