;;; Programme qui permet de faire un choix dans un menu
;;; Auteur: Eric Wenaas
;;; Exercice 4.1
;;; Version: 1.1
segment .data
;;; Chaines du menu
pres: db "Choisir l'option desiree:", 10
len_pres: equ $-pres
opt_1: db "1) Repertoire en ordre de taille", 10
len_opt_1: equ $-opt_1
opt_2: db "2) Repertoire en ordre sur la date", 10
len_opt_2: equ $-opt_2
opt_3: db "3) Repertoire en ordre sur le nom", 10
len_opt_3: equ $-opt_3
opt_4: db "4) Repertoire en ordre sur l'extension", 10
len_opt_4: equ $-opt_4
opt_5: db "5) Repertoire en largeur", 10
len_opt_5: equ $-opt_5
opt_6: db "6) Repertoire sans particularite", 10
len_opt_6: equ $-opt_6
inv: db "Entrez votre choix: "
len_inv: equ $-inv
len_menu equ $-pres
;;; Chaine de reponse
reponse: db "Vous avez choisi... "
len_reponse: equ $-reponse
;;; Chaine d'erreur
ch_erreur: db "Vous n'avez pas entre une valeur valide", 10
len_ch_erreur: equ $-ch_erreur
segment .bss
;;; Le choix
choix: resb 2 ; 2 car on laisse une place pour le retour
ch_rep: resd 1 ; On conserve l'adresse de la chaine qu'on va afficher
len_ch_rep: resd 1 ; et la taille de cette chaine
segment .text
global _start
_start:
;; Affichage du menu
mov eax, 4
mov ebx, 1
mov ecx, pres
mov edx, len_menu
int 0x80
;; Saisie du choix:
mov eax, 3
mov ebx, 0
mov ecx, choix
mov edx, 2 ; 2 pour traiter l'espace
int 0x80
;; Analyse du choix
;; On prend pour acquis que le choix est entre 1 et 6... la valildation est dans le
;; prochain exercice
mov al, [choix] ; On recupere le choix et on le place dans un registre
;; On fait un switch pour trouver la chaine et mettre les bonnes valeurs dans les registres ecx et edx
cmp al, '1'
jne s_2
mov dword [ch_rep], opt_1
mov dword [len_ch_rep] , len_opt_1
jmp fin_s
s_2: cmp al, '2'
jne s_3
mov dword [ch_rep], opt_2
mov dword [len_ch_rep] , len_opt_2
jmp fin_s
s_3: cmp al, '3'
jne s_4
mov dword [ch_rep], opt_3
mov dword [len_ch_rep] , len_opt_3
jmp fin_s
s_4: cmp al, '4'
jne s_5
mov dword [ch_rep], opt_4
mov dword [len_ch_rep] , len_opt_4
jmp fin_s
s_5: cmp al, '5'
jne s_6
mov dword [ch_rep], opt_5
mov dword [len_ch_rep] , len_opt_5
jmp fin_s
s_6: cmp al, '6'
jne aff_erreur
mov dword [ch_rep], opt_6
mov dword [len_ch_rep] , len_opt_6
jmp fin_s
fin_s:
;; Place la chaine au bon endroit
add dword [ch_rep], 3 ; On saute par-dessus #)
sub dword [len_ch_rep], 3
;; Affichage du resultat
mov eax, 4
mov ebx, 1
mov ecx, reponse
mov edx, len_reponse
int 0x80
mov eax, 4
mov ebx, 1
mov ecx, [ch_rep]
mov edx, [len_ch_rep]
int 0x80
;;; Sort du programme
mov ebx, 0
mov eax, 1
int 0x80
aff_erreur:
mov eax, 4
mov ebx, 1
mov ecx, ch_erreur
mov edx, len_ch_erreur
int 0x80
;; Sort du programme avec erreur
mov ebx, 1 ; il y a une erreur
mov eax, 1
int 0x80
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