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⟦224983d0a⟧ Ada Source

    Length: 3072 (0xc00)
    Types: Ada Source
    Notes: 03_class, FILE, R1k_Segment, e3_tag, package body Buffer, seg_0046bb, separate Spreadsheet_Generic

Derivation

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

separate (Spreadsheet_Generic)
package body Buffer is
    Buf       : String (1 .. 100);
    Index     : Positive := Buf'First;
    Untouched : Boolean  := True;

    subtype Printable_Characters is Character range ' ' .. '~';

    procedure Clear is
    begin
        Index     := Buf'First;
        Buf       := Buf'Length * ' ';
        Untouched := True;
    end Clear;

    procedure Erase is
    begin
        while Index > Buf'First loop
            Buffer.Del;
        end loop;
    end Erase;

    procedure Append (C : Character) is
    begin  
        if Untouched then
            Untouched := False;
            -- clean the place
            Screen.Inverse (Width * ' ');
            Screen.Cursor;
        end if;
        if Index <= Buf'Last and C in Printable_Characters then
            Buf (Index) := C;
            Screen.Inverse (Buf (Index .. Index));
            Screen.Cursor (Index);
            Index := Index + 1;
        else
            Beep;
        end if;
    end Append;

    procedure Put (S : String) is
        Last : Integer := S'Last;
    begin  
        while Last > S'First and then S (Last) = ' ' loop
            Last := Last - 1;
        end loop;
        Untouched := False;
        Buf (1 .. Last - S'First + 1) := S (S'First .. Last);
        Index := Last - S'First + 2;
    end Put;

    procedure Del is
    begin
        if Index > Buf'First then
            Index       := Index - 1;
            Buf (Index) := ' ';
            Screen.Cursor (Index - 1);
            Screen.Inverse (Buf (Index .. Index));
            Screen.Cursor (Index - 1);
        else
            Beep;
        end if;
    end Del;

    function Get return String is
    begin
        return Buf (Buf'First .. Index - 1);
    end Get;

    function Is_Untouched return Boolean is
    begin
        return Untouched;
    end Is_Untouched;
end Buffer;

    nblk1=2
    nid=0
    hdr6=4
        [0x00] rec0=25 rec1=00 rec2=01 rec3=006
        [0x01] rec0=27 rec1=00 rec2=02 rec3=000
    tail 0x2150049fe815c66f31b54 0x42a00088462061e03