changement dossier
This commit is contained in:
Aloyse ARNAUD
677
Aloyse et Vincent/nfa.c
Normal file
677
Aloyse et Vincent/nfa.c
Normal file
@@ -0,0 +1,677 @@
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/***************************/
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/* Implémentation des NFAs */
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/***************************/
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#include "nfa.h"
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#include "error.h"
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#include "graphs.h"
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#include "type_dequeue.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define CHECK(ptr) \
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if (ptr == NULL) { \
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ERROR("malloc failed"); \
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exit(EXIT_FAILURE); \
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}
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static char *uint_to_chars(const uint i) {
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char *str = malloc(12 * sizeof(char));
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// 12 car un uint peut avoir 10 chiffres + le '\0' (4 294 967 295) + jsp
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CHECK(str);
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sprintf(str, "%u", i);
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return str;
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}
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/***************************************************************/
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/* Affichage des noms si ce sont des pointeurs sur des entiers */
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/***************************************************************/
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void nfa_print_letter(const nfa *thenfa, const uint num_letter, FILE *out) {
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printf("nfa_print_letter\n");
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fprintf(out, "%c", thenfa->alpha_names[num_letter]);
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}
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char *nfa_copy_alpha(const nfa *thenfa) {
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printf("nfa_copy_alpha\n");
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char *copy = malloc((thenfa->trans->size_alpha) * sizeof(char));
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CHECK(copy);
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for (uint i = 0; i < thenfa->trans->size_alpha; i++) {
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copy[i] = thenfa->alpha_names[i];
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}
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return copy;
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}
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void nfa_print_state(const nfa *thenfa, const uint numstate, FILE *out) {
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printf("nfa_print_state\n");
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if (thenfa->state_names == NULL) {
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fprintf(out, "%u", numstate);
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} else {
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fprintf(out, "%s", thenfa->state_names[numstate]);
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}
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}
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void nfa_reset_state_names(nfa *thenfa) {
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printf("nfa_reset_state_names\n");
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if (thenfa->state_names != NULL) {
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for (uint i = 0; i < thenfa->trans->size_alpha; i++) {
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if (thenfa->state_names[i] != NULL) {
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free(thenfa->state_names[i]);
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}
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}
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free(thenfa->state_names);
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thenfa->state_names = NULL;
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}
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}
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char *nfa_copy_one_name(const nfa *thenfa, const uint thestate) {
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printf("nfa_copy_one_name\n");
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if (thenfa->state_names == NULL) {
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return uint_to_chars(thestate);
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}
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const size_t len = strlen(thenfa->state_names[thestate]) + 1;
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//+1 car strlen ne compte pas le '\0'
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char *copy = malloc(len * sizeof(char));
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CHECK(copy);
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strncpy(copy, thenfa->state_names[thestate], len);
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return copy;
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}
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// ReSharper disable once CppParameterMayBeConstPtrOrRef
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char **nfa_copy_all_names(nfa *thenfa) {
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printf("nfa_copy_all_names\n");
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// Vérifier si le NFA utilise des noms pour les états
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if (thenfa->state_names == NULL) {
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return NULL;
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}
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// Allouer de la mémoire pour le tableau de noms
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char **copy_names = malloc(thenfa->trans->size_graph * sizeof(char *));
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CHECK(copy_names);
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// Copier chaque nom d'état
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for (uint i = 0; i < thenfa->trans->size_graph; i++) {
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copy_names[i] = nfa_copy_one_name(thenfa, i);
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}
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return copy_names;
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}
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/*********************************/
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/* Initialisation et suppression */
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/*********************************/
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nfa *create_emptylang(void) {
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printf("create_emptylang\n");
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nfa *empty = malloc(sizeof(nfa));
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CHECK(empty);
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empty->trans = create_lgraph_noedges(0, 0);
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empty->initials = create_dequeue();
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empty->finals = create_dequeue();
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empty->alpha_names = malloc(sizeof(char));
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CHECK(empty->alpha_names);
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empty->alpha_names[0] = '\0';
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empty->state_names = NULL;
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return empty;
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}
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nfa *create_sing_epsilon(void) {
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printf("create_sing_epsilon\n");
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nfa *epsilon = malloc(sizeof(nfa));
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CHECK(epsilon);
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epsilon->trans = create_lgraph_noedges(1, 0);
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epsilon->initials = create_dequeue();
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epsilon->finals = create_dequeue();
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lefins_dequeue(0, epsilon->initials);
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lefins_dequeue(0, epsilon->finals);
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epsilon->alpha_names = malloc(sizeof(char));
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CHECK(epsilon->alpha_names);
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epsilon->alpha_names[0] = '\0';
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epsilon->state_names = malloc(sizeof(char *));
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CHECK(epsilon->state_names);
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epsilon->state_names[0] = "ε";
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return epsilon;
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}
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nfa *create_sing_letter(const char theletter) {
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printf("create_sing_letter\n");
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// Créer le graphe des transitions avec 2 états et 1 lettre dans l'alphabet
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lgraph *trans = create_lgraph_noedges(2, 1);
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// Ajouter une transition de l'état 0 à l'état 1 avec la lettre theletter
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dequeue *transition = create_dequeue();
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rigins_dequeue(1, transition);
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trans->edges[0][0] = transition;
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// Créer la liste des états initiaux (état 0)
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dequeue *initials = create_dequeue();
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rigins_dequeue(0, initials);
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// Créer la liste des états finaux (état 1)
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dequeue *finals = create_dequeue();
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rigins_dequeue(1, finals);
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// Allouer de la mémoire pour le nom de la lettre
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char *alpha_names = malloc(sizeof(char));
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CHECK(alpha_names);
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alpha_names[0] = theletter;
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// Créer le NFA
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nfa *thenfa = malloc(sizeof(nfa));
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thenfa->trans = trans;
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thenfa->initials = initials;
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thenfa->finals = finals;
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thenfa->alpha_names = alpha_names;
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thenfa->state_names = NULL; // Pas de noms d'états
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return thenfa;
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}
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void nfa_delete(nfa *thenfa) {
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printf("nfa_delete\n");
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// ne free pas le pointeur !
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nfa_reset_state_names(thenfa);
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delete_lgraph(thenfa->trans);
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delete_dequeue(thenfa->initials);
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delete_dequeue(thenfa->finals);
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free(thenfa->alpha_names);
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}
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void nfa_overwrite(nfa *nfa1, nfa *nfa2) {
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printf("nfa_overwrite\n");
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nfa_delete(nfa1);
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*nfa1 = *nfa2;
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free(nfa2);
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}
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/***********************************/
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/* Opérations simples sur les NFAs */
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/***********************************/
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nfa *nfa_copy(nfa *thenfa) {
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printf("nfa_copy\n");
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nfa *copy = malloc(sizeof(nfa));
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CHECK(copy);
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copy->initials = create_dequeue();
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copy->finals = create_dequeue();
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copy_dequeue_right(copy->initials, thenfa->initials, 0);
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copy_dequeue_right(copy->finals, thenfa->finals, 0);
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copy->alpha_names = nfa_copy_alpha(thenfa);
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copy->state_names = nfa_copy_all_names(thenfa);
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copy->trans = create_lgraph_noedges(thenfa->trans->size_graph,
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thenfa->trans->size_alpha);
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for (uint i = 0; i < thenfa->trans->size_graph; i++) {
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for (uint j = 0; j < thenfa->trans->size_alpha; j++) {
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dequeue *edges = create_dequeue();
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copy_dequeue_right(edges, thenfa->trans->edges[i][j], 0);
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copy->trans->edges[i][j] = edges;
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}
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}
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return copy;
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}
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nfa *nfa_copy_exalpha(nfa *thenfa, const char *letters, const uchar tabsize) {
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nfa *copy = nfa_copy(thenfa);
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CHECK(copy);
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char *alpha = malloc(sizeof(char) * (copy->trans->size_alpha + tabsize));
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CHECK(alpha);
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for (uint l = 0; l < copy->trans->size_alpha; l++) {
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alpha[l] = copy->alpha_names[l];
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}
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for (uint l = 0; l < tabsize; l++) {
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alpha[l + copy->trans->size_alpha] = letters[l];
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}
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free(copy->alpha_names);
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copy->alpha_names = alpha;
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return copy;
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}
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// Union disjointe de deux nfas
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// ReSharper disable once CppParameterMayBeConstPtrOrRef
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nfa *nfa_union(nfa *nfa1, nfa *nfa2) {
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printf("nfa_union\n");
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// nfa1 U nfa2 = nfa1 + nfa2 - (nfa1 ∩ nfa2)
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nfa *nfa_uni =
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nfa_copy_exalpha(nfa1, nfa2->alpha_names, nfa2->trans->size_alpha);
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// On remplace les noms d'états
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nfa_reset_state_names(nfa_uni);
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// On unie les états initiaux
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copy_dequeue_right(nfa_uni->initials, nfa2->initials,
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nfa1->trans->size_graph);
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// On unie les états finaux
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copy_dequeue_right(nfa_uni->finals, nfa2->finals, nfa1->trans->size_graph);
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// on crée le graphe
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lgraph *g =
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create_lgraph_noedges(nfa1->trans->size_graph + nfa2->trans->size_graph,
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nfa1->trans->size_alpha + nfa2->trans->size_alpha);
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// on récupère le premier graphe
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for (uint sommet = 0; sommet < nfa1->trans->size_graph; sommet++) {
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for (uint lettre = 0; lettre < nfa1->trans->size_alpha; lettre++) {
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copy_dequeue_right(g->edges[sommet][lettre],
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nfa1->trans->edges[sommet][lettre], 0);
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}
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}
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// on récupère le second graphe
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const uint d1 = nfa1->trans->size_graph;
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const uint d2 = nfa1->trans->size_alpha;
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for (uint sommet = 0; sommet < nfa2->trans->size_graph; sommet++) {
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for (uint lettre = 0; lettre < nfa2->trans->size_alpha; lettre++) {
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copy_dequeue_right(g->edges[sommet + d1][lettre + d2],
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nfa2->trans->edges[sommet][lettre], d1);
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}
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}
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delete_lgraph(nfa_uni->trans);
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nfa_uni->trans = g;
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return nfa_uni;
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}
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// ReSharper disable once CppParameterMayBeConstPtrOrRef
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nfa *nfa_concat(nfa *nfa1, nfa *nfa2) {
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printf("nfa_concat\n");
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// nfa1 . nfa2 <=> ε -> nfa1 -> nfa2 -> ε
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nfa *nfa_concaten =
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nfa_copy_exalpha(nfa1, nfa2->alpha_names, nfa2->trans->size_alpha);
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// On remplace les noms d'états
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nfa_reset_state_names(nfa_concaten);
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// on corrige les états finaux
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delete_dequeue(nfa_concaten->finals);
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nfa_concaten->finals = create_dequeue();
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copy_dequeue_right(nfa_concaten->finals, nfa2->finals,
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nfa1->trans->size_alpha);
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// on crée le graphe
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const uint cumul = size_dequeue(nfa2->initials);
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lgraph *g = create_lgraph_noedges(
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nfa1->trans->size_graph + nfa2->trans->size_graph - cumul,
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nfa1->trans->size_alpha + nfa2->trans->size_alpha);
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// on récupère le premier graphe
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for (uint sommet = 0; sommet < nfa1->trans->size_graph; sommet++) {
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for (uint lettre = 0; lettre < nfa1->trans->size_alpha; lettre++) {
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copy_dequeue_right(g->edges[sommet][lettre],
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nfa1->trans->edges[sommet][lettre], 0);
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}
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}
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// on récupère le second graphe
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uint d1 = nfa1->trans->size_alpha;
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uint d2 = nfa1->trans->size_graph;
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for (uint sommet = 0; sommet < nfa2->trans->size_graph; sommet++) {
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for (uint lettre = 0; lettre < nfa2->trans->size_alpha; lettre++) {
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copy_dequeue_right(g->edges[sommet + d2 - cumul][lettre + d1],
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nfa2->trans->edges[sommet][lettre], d2 - cumul);
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}
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}
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// on recupère les arrêtes de transition entre les deux graphes
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uint size = size_dequeue(nfa2->initials);
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uint size2 = size_dequeue(nfa1->finals);
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for (uint i = 0; i < size; i++) {
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const uint depart = lefread_dequeue(nfa2->initials, i);
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for (uint j = 0; i < size2; i++) {
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const uint arrivee = lefread_dequeue(nfa1->finals, j);
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for (uint lettre = 0; lettre < nfa2->trans->size_alpha; lettre++) {
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copy_dequeue_right(g->edges[arrivee][lettre + nfa1->trans->size_alpha],
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nfa2->trans->edges[depart][lettre],
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nfa1->trans->size_alpha);
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}
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}
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}
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delete_lgraph(nfa_concaten->trans);
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nfa_concaten->trans = g;
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return nfa_concaten;
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}
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// Étoile de Kleene d'un NFA
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nfa *nfa_star(nfa *thenfa) {
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printf("nfa_star\n");
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// final pointe chaque initial et on rajoute un epsilon
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// ajoute les epsilon
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nfa *kleene = nfa_copy(thenfa);
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bool eps = false;
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// reconstitution du graphes avec un Epsilon
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lgraph *g = create_lgraph_noedges(kleene->trans->size_graph + 1,
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kleene->trans->size_alpha);
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for (uint sommet = 0; sommet < kleene->trans->size_graph; sommet++) {
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if (mem_dequeue(sommet, kleene->finals) &&
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mem_dequeue(sommet, kleene->initials)) { // ε
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eps = true;
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continue;
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}
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// on récupère nos arrêtes
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for (uint lettre = 0; lettre < kleene->trans->size_alpha; lettre++) {
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dequeue *edges = kleene->trans->edges[sommet][lettre];
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copy_dequeue_right(g->edges[sommet][lettre], edges, 0);
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// on ajoute les états initiaux à tout ce qui pointes sur un état
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// final
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uint size = size_dequeue(kleene->finals);
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for (uint s = 0; s < size; s++) {
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const uint sortie = lefread_dequeue(kleene->finals, s);
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// si on a une transition vers un état final, on ajoute les états
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// initiaux aux transitions
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if (mem_dequeue_sorted(sortie, edges)) {
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uint size2 = size_dequeue(kleene->initials);
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for (uint e = 0; e < size2; e++) {
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const uint entree = lefread_dequeue(kleene->initials, e);
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lefins_dequeue(entree, g->edges[sommet][lettre]);
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}
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sort_dequeue_norepeat(g->edges[sommet][lettre]);
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}
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}
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}
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}
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if (!eps) {
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insert_dequeue(kleene->initials, kleene->trans->size_graph);
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insert_dequeue(kleene->finals, kleene->trans->size_graph);
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} else {
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// on supprime l'état réservé pour l'epsilon
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g->size_graph--;
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for (uint lettre = 0; lettre < g->size_alpha; lettre++) {
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free(g->edges[g->size_graph][lettre]);
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}
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}
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delete_lgraph(kleene->trans);
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kleene->trans = g;
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return kleene;
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}
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// note les états accessibles depuis l'état donné
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// note les états depuis lesquels on peut atteindre un état final à partir
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// de l'état donné
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static bool trimer(nfa *thenfa, bool *reachable,
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bool *may_exit, // NOLINT(*-no-recursion)
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const uint sommet) {
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printf("trimer\n");
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if (reachable[sommet]) {
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// on a déjà visité cet état
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return may_exit[sommet];
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}
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reachable[sommet] = true;
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const lgraph *g = thenfa->trans;
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for (uint i = 0; i < g->size_alpha; i++) {
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dequeue *edges = g->edges[sommet][i];
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const uint size = size_dequeue(edges);
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for (uint j = 0; j < size; j++) {
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const uint etat = lefread_dequeue(edges, j);
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if (trimer(thenfa, reachable, may_exit, etat)) {
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may_exit[sommet] = true;
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}
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}
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}
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return mem_dequeue_sorted(sommet, thenfa->finals);
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}
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// Élimination des états non-accessibles et non-co-accessibles
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// Le NFA produit n'est pas nécessairement complet
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nfa *nfa_trim(nfa *thenfa) {
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printf("nfa_trim\n");
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nfa *trimmed = nfa_copy(thenfa);
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bool reachable[trimmed->trans->size_graph];
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||||
bool may_end[trimmed->trans->size_graph];
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||||
for (uint i = 0; i < trimmed->trans->size_graph; i++) {
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reachable[i] = false;
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may_end[i] = false;
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}
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// on marque les états accessibles
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uint size = size_dequeue(trimmed->initials);
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||||
for (uint i = 0; i < size; i++) {
|
||||
const uint etat = lefread_dequeue(trimmed->initials, i);
|
||||
trimer(trimmed, reachable, may_end, etat);
|
||||
}
|
||||
// on compte les états accessibles
|
||||
int c = 0;
|
||||
for (uint i = 0; i < trimmed->trans->size_graph; i++) {
|
||||
if (reachable[i] && may_end[i]) {
|
||||
c++;
|
||||
}
|
||||
}
|
||||
// on crée un nouveau graphe
|
||||
lgraph *new_graph = create_lgraph_noedges(c, trimmed->trans->size_alpha);
|
||||
for (uint i = 0; i < new_graph->size_graph; i++) {
|
||||
for (uint j = 0; j < new_graph->size_alpha; j++) {
|
||||
// on récupère les arêtes accessibles
|
||||
dequeue *edges = new_graph->edges[i][j];
|
||||
dequeue *old_edges = trimmed->trans->edges[i][j];
|
||||
size = size_dequeue(old_edges);
|
||||
for (uint k = 0; k < size; k++) {
|
||||
const uint etat = lefread_dequeue(old_edges, k);
|
||||
if (reachable[etat] && may_end[etat]) {
|
||||
lefins_dequeue(etat, edges);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// on remplace le graphe
|
||||
delete_lgraph(trimmed->trans);
|
||||
trimmed->trans = new_graph;
|
||||
|
||||
// on supprime les états finaux non accessibles
|
||||
size = size_dequeue(trimmed->finals);
|
||||
for (uint i = 0; i < size; i++) {
|
||||
const uint etat = lefpull_dequeue(trimmed->finals);
|
||||
if (reachable[etat]) {
|
||||
rigins_dequeue(etat, trimmed->finals);
|
||||
}
|
||||
}
|
||||
// on supprime les états initiaux non accessibles
|
||||
size = size_dequeue(trimmed->initials);
|
||||
for (uint i = 0; i < size; i++) {
|
||||
const uint etat = lefpull_dequeue(trimmed->initials);
|
||||
if (reachable[etat]) {
|
||||
rigins_dequeue(etat, trimmed->initials);
|
||||
}
|
||||
}
|
||||
|
||||
// on supprime les états non accessibles
|
||||
char **new_state_names = malloc(sizeof(char *) * c);
|
||||
CHECK(new_state_names);
|
||||
c = 0;
|
||||
for (uint i = 0; i < thenfa->trans->size_graph; i++) {
|
||||
if (reachable[i] && may_end[i]) {
|
||||
new_state_names[c] = nfa_copy_one_name(thenfa, i);
|
||||
c++;
|
||||
}
|
||||
}
|
||||
free(trimmed->state_names);
|
||||
trimmed->state_names = new_state_names;
|
||||
return trimmed;
|
||||
}
|
||||
|
||||
// Élimination des états non-accessibles (modifie le NFA originel)
|
||||
void nfa_trim_mod(nfa *thenfa) {
|
||||
printf("nfa_trim_mod\n");
|
||||
bool reachable[thenfa->trans->size_graph];
|
||||
bool may_end[thenfa->trans->size_graph];
|
||||
for (uint i = 0; i < thenfa->trans->size_graph; i++) {
|
||||
reachable[i] = false;
|
||||
may_end[i] = false;
|
||||
}
|
||||
// on marque les états accessibles
|
||||
uint size = size_dequeue(thenfa->initials);
|
||||
for (uint i = 0; i < size; i++) {
|
||||
const uint etat = lefread_dequeue(thenfa->initials, i);
|
||||
trimer(thenfa, reachable, may_end, etat);
|
||||
}
|
||||
// on compte les états accessibles
|
||||
int c = 0;
|
||||
for (uint i = 0; i < thenfa->trans->size_graph; i++) {
|
||||
if (reachable[i] && may_end[i]) {
|
||||
c++;
|
||||
}
|
||||
}
|
||||
// on crée un nouveau graphe
|
||||
lgraph *new_graph = create_lgraph_noedges(c, thenfa->trans->size_alpha);
|
||||
for (uint i = 0; i < new_graph->size_graph; i++) {
|
||||
for (uint j = 0; j < new_graph->size_alpha; j++) {
|
||||
// on récupère les arêtes accessibles
|
||||
dequeue *edges = new_graph->edges[i][j];
|
||||
dequeue *old_edges = thenfa->trans->edges[i][j];
|
||||
size = size_dequeue(old_edges);
|
||||
for (uint k = 0; k < size; k++) {
|
||||
const uint etat = lefread_dequeue(old_edges, k);
|
||||
if (reachable[etat] && may_end[etat]) {
|
||||
lefins_dequeue(etat, edges);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// on remplace le graphe
|
||||
const uint saved_size = thenfa->trans->size_graph; // utile pour plus tard
|
||||
delete_lgraph(thenfa->trans);
|
||||
thenfa->trans = new_graph;
|
||||
|
||||
// on supprime les états finaux non accessibles
|
||||
size = size_dequeue(thenfa->finals);
|
||||
for (uint i = 0; i < size; i++) {
|
||||
const uint etat = lefpull_dequeue(thenfa->finals);
|
||||
if (reachable[etat]) {
|
||||
rigins_dequeue(etat, thenfa->finals);
|
||||
}
|
||||
}
|
||||
// on supprime les états initiaux non accessibles
|
||||
size = size_dequeue(thenfa->initials);
|
||||
for (uint i = 0; i < size; i++) {
|
||||
const uint etat = lefpull_dequeue(thenfa->initials);
|
||||
if (reachable[etat]) {
|
||||
rigins_dequeue(etat, thenfa->initials);
|
||||
}
|
||||
}
|
||||
|
||||
// on supprime les états non accessibles
|
||||
char **new_state_names = malloc(sizeof(char *) * c);
|
||||
CHECK(new_state_names);
|
||||
c = 0;
|
||||
for (uint i = 0; i < saved_size; i++) {
|
||||
if (reachable[i] && may_end[i]) {
|
||||
new_state_names[c] = nfa_copy_one_name(thenfa, i);
|
||||
c++;
|
||||
}
|
||||
}
|
||||
free(thenfa->state_names);
|
||||
thenfa->state_names = new_state_names;
|
||||
}
|
||||
|
||||
// Miroir
|
||||
nfa *nfa_mirror(nfa *thenfa) {
|
||||
printf("nfa_mirror\n");
|
||||
nfa *mirror = malloc(sizeof(nfa));
|
||||
CHECK(mirror);
|
||||
// on inverse les états initiaux et finaux
|
||||
mirror->initials = create_dequeue();
|
||||
copy_dequeue_right(mirror->initials, thenfa->finals, 0);
|
||||
mirror->finals = create_dequeue();
|
||||
copy_dequeue_right(mirror->finals, thenfa->initials, 0);
|
||||
// on copie les alphabets
|
||||
mirror->alpha_names = nfa_copy_alpha(thenfa);
|
||||
// on copie les noms d'états
|
||||
mirror->state_names = nfa_copy_all_names(thenfa);
|
||||
// on prépare le graphe
|
||||
lgraph *g = create_lgraph_noedges(thenfa->trans->size_graph,
|
||||
thenfa->trans->size_alpha);
|
||||
for (uint sommet = 0; sommet < thenfa->trans->size_graph; sommet++) {
|
||||
for (uint lettre = 0; lettre < thenfa->trans->size_alpha; lettre++) {
|
||||
dequeue *edge = thenfa->trans->edges[sommet][lettre];
|
||||
const uint size = size_dequeue(edge);
|
||||
for (uint i = 0; i < size; i++) {
|
||||
const uint etat = lefread_dequeue(edge, i);
|
||||
lefins_dequeue(sommet, g->edges[etat][lettre]);
|
||||
}
|
||||
}
|
||||
}
|
||||
mirror->trans = g;
|
||||
return mirror;
|
||||
}
|
||||
|
||||
/************************/
|
||||
/* Informations sur NFA */
|
||||
/************************/
|
||||
|
||||
// ReSharper disable once CppParameterMayBeConstPtrOrRef
|
||||
int nfa_nb_trans(nfa *thenfa) {
|
||||
printf("nf_nb_trans\n");
|
||||
int nb_trans = 0;
|
||||
for (uint sommet = 0; sommet < thenfa->trans->size_graph; sommet++) {
|
||||
for (uint lettre = 0; lettre < thenfa->trans->size_alpha; lettre++) {
|
||||
nb_trans += (int)size_dequeue(thenfa->trans->edges[sommet][lettre]);
|
||||
}
|
||||
}
|
||||
return nb_trans;
|
||||
}
|
||||
// ReSharper disable once CppParameterMayBeConstPtrOrRef
|
||||
bool nfa_is_det(nfa *thenfa) {
|
||||
printf("nfa_is_det\n");
|
||||
printf("'ça va pas marcher mais chhhh...\n");
|
||||
for (uint sommet = 0; sommet < thenfa->trans->size_graph; sommet++) {
|
||||
for (uint lettre = 0; lettre < thenfa->trans->size_alpha; lettre++) {
|
||||
if (size_dequeue(thenfa->trans->edges[sommet][lettre]) > 1) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool nfa_is_comp(nfa *thenfa) {
|
||||
printf("nfa_is_comp\n");
|
||||
for (uint sommet = 0; sommet < thenfa->trans->size_graph; sommet++) {
|
||||
for (uint lettre = 0; lettre < thenfa->trans->size_alpha; lettre++) {
|
||||
if (size_dequeue(thenfa->trans->edges[sommet][lettre]) < 1) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
// ReSharper disable once CppParameterMayBeConstPtrOrRef
|
||||
bool nfa_is_empty(nfa *thenfa) {
|
||||
printf("nfa_is_empty\n");
|
||||
return thenfa->trans->size_alpha == 0 && thenfa->trans->size_graph == 0;
|
||||
}
|
||||
|
||||
bool nfa_accepts(nfa *thenfa, const char *theword) {
|
||||
printf("nfa_accepts\n");
|
||||
dequeue *runs = nfa_compute_runs(thenfa, theword);
|
||||
const uint size = size_dequeue(runs);
|
||||
for (uint i = 0; i < size; i++) {
|
||||
const uint etat = lefread_dequeue(runs, i);
|
||||
if (mem_dequeue_sorted(etat, thenfa->finals)) {
|
||||
delete_dequeue(runs);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
delete_dequeue(runs);
|
||||
return false;
|
||||
}
|
||||
|
||||
// Calcule les états qui sont atteints par un mot dans un NFA.
|
||||
// ReSharper disable once CppParameterMayBeConstPtrOrRef
|
||||
dequeue *nfa_compute_runs(nfa *thenfa, const char *theword) {
|
||||
printf("nfa_compute_runs\n");
|
||||
dequeue *runs = create_dequeue();
|
||||
uint indice = 0;
|
||||
uint size = size_dequeue(thenfa->initials);
|
||||
while (indice < strlen(theword)) {
|
||||
dequeue *new_runs = create_dequeue();
|
||||
for (uint i = 0; i < size; i++) {
|
||||
const uint etat = lefread_dequeue(thenfa->initials, i);
|
||||
const uint lettre = (uint)theword[indice];
|
||||
merge_sorted_dequeue(new_runs, thenfa->trans->edges[etat][lettre]);
|
||||
}
|
||||
delete_dequeue(runs);
|
||||
runs = new_runs;
|
||||
size = size_dequeue(runs);
|
||||
indice++;
|
||||
}
|
||||
return runs;
|
||||
}
|
||||
Reference in New Issue
Block a user