projet-programmation-imperative/src/vector.adb

with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;

package body vector is

    procedure initialize(vec: in out T_Vecteur_Element; value: in T_Element) is
    begin
        for i in 0..N-1 loop
            vec(i) := value;
        end loop;
    end initialize;

    procedure initialize(vec: in out T_Vecteur_Natural) is
    begin
        for i in 0..N-1 loop
            vec(i) := i;
        end loop;
    end initialize;

    function sum(vec: in T_Vecteur_Element) return T_Element is
        s: T_Element := 0.0;
    begin
        for i in 0..N-1 loop
            s := s + vec(i);
        end loop;
        return s;
    end sum;

    procedure put(vec: in T_Vecteur_Element) is
        use Text_T_Element;
    begin
        for i in 0..N-1 loop
            put(vec(i)); new_line;
        end loop;
    end put;

    procedure put(file: in out Ada.Text_IO.File_Type; vec: in T_Vecteur_Element) is
        use Text_T_Element;
    begin
        for i in 0..N-1 loop
            put(file, vec(i), Fore=>1, Aft=>10);
            new_line(file);
        end loop;
    end put;

    procedure put(file: in out Ada.Text_IO.File_Type; vec: in T_Vecteur_Natural) is
    begin
        for i in 0..N-1 loop
            put(file, vec(i), 1);
            new_line(file);
        end loop;
    end put;

    procedure sort_insert_desc(vec: in out T_Vecteur_Element; vec_index: in out T_Vecteur_Natural) is
        tmp_Element: T_Element;
        tmp_Natural: Natural;
        max: Natural;
    begin
        for i in 0..N-2 loop
            max := i;
            for j in i+1..N-1 loop
                if vec(max) <= vec(j) then
                    max := j;
                end if;
            end loop;
            if max /= i then
                tmp_Element := vec(i);
                vec(i) := vec(max);
                vec(max) := tmp_Element;

                tmp_Natural := vec_index(i);
                vec_index(i) := vec_index(max);
                vec_index(max) := tmp_Natural;
            end if;
        end loop;
    end sort_insert_desc;

    procedure quicksort(vec: in out T_Vecteur_Element; vec_index: in out T_Vecteur_Natural; a, b: in Natural) is
        pivot: Natural := a;
        i: Natural := a;
        tmp: T_Element;
    begin
        if b - a > 1 then
            for j in a+1..b loop
                if vec(j) <= vec(pivot) then
                    i := i + 1;
                    tmp := vec(i);
                    vec(i) := vec(j);
                    vec(j) := tmp;
                else
                    null;
                end if;
            end loop;

            tmp := vec(i);
            vec(i) := vec(pivot);
            vec(pivot) := tmp;
            
            pivot := i;

            put(vec); new_line;
            
            if pivot - 1 > 0 then    
                quicksort(vec, vec_index, a, pivot-1);
            elsif b - pivot - 1 > 0 then
                quicksort(vec, vec_index, pivot+1, b);
            else 
                null;
            end if;
        else
            null;
        end if;
    end quicksort;

end vector;