/* Creer un automate a partir d'un fichier texte
* Valeur de retour : Automate cree
*/
bool parse(FILE *data, struct fsm *fsm) {
char *param, *tmp;
char type[TYPE_SIZE], s[LINE_SIZE];
bool alphabet = false;
struct state *st, *st2;
struct transition *tr;
int i = 0, j;
char **trans = NULL;
fsm->alphabet = NULL;
fsm->initials = NULL;
fsm->states = NULL;
fsm->ilen = fsm->alen = fsm->slen = 0;
while(EOF != fscanf(data, "%18s%255[^\n]", type, s)) { /* TYPE_SIZE et LINE_SIZE */
param = s;
while((*param == ' ' || *param == '\t') && *param != '\0') {
param++;
}
if(!(*param)) {
fprintf(stderr, "parse: `%s %s': Invalid format.\n", type, s);
return false;
}
if(!strcmp(type, "alphabet_terminal")) {
alphabet = true;
tmp = strtok(param, " ");
while(tmp != NULL) {
if(!addAlphabet(fsm, tmp))
return false;
tmp = strtok(NULL, " ");
}
}
else if(!strcmp(type, "initial")) {
tmp = strtok(param, " ");
while(tmp != NULL) {
if(!addInitial(fsm, tmp))
return false;
tmp = strtok(NULL, " ");
}
}
else if(!strcmp(type, "terminal")) {
tmp = strtok(param, " ");
while(tmp != NULL) {
if(!addState(fsm, tmp, true))
return false;
tmp = strtok(NULL, " ");
}
}
else {
i = 0;
trans = NULL;
tmp = strtok(param, " ");
if(((trans = realloc(trans, (i+1)*sizeof(char *))) == NULL) ||
((trans[i] = malloc((strlen(tmp)+1)*sizeof(char))) == NULL)) {
fprintf(stderr, "parse: Memory allocation failed.\n");
return false;
}
strcpy(trans[i++], tmp);
if((tmp = strtok(NULL, " ")) == NULL) {
fprintf(stderr, "parse: `%s %s': Invalid format; destination stateis not specified.\n", type, s);
return false;
}
do {
if(((trans = realloc(trans, (i+1)*sizeof(char *))) == NULL) ||
((trans[i] = malloc((strlen(tmp)+1)*sizeof(char))) == NULL)) {
fprintf(stderr, "parse: Memory allocation failed.\n");
return false;
}
strcpy(trans[i++], tmp);
} while((tmp = strtok(NULL, " ")) != NULL);
if(((st = addState(fsm, type, false)) == NULL) ||
((st2 = addState(fsm, trans[i-1], false)) == NULL)) {
return false;
}
for(j = 0; j < i-1; j++) {
if(alphabet && (!containsLetter(fsm, trans[j])) && strcmp(trans[j], EPSILON)) {
fprintf(stderr, "parse: `%s' does not belong to the alphabet.\n", trans[j]);
for(j = 0; j < i; j++)
free(trans[j]);
free(trans);
return false;
}
else if(!alphabet && strcmp(trans[j], EPSILON)) {
if(!addAlphabet(fsm, trans[j]))
return false;
}
if(((tr = createTransition(trans[j], st2)) == NULL) ||
(!addTransition(st, tr)))
return false;
}
for(j = 0; j < i; j++)
free(trans[j]);
free(trans);
}
}
return true;
}
/**
* The goOn function from Gordon's paper.
* @param pos The position relative to the current anchor square.
* @param L A letter from 'A' to 'Z'.
* @param word A possible word being built.
* @param rack An integer describing the rack.
* @param NewArc The next arc based on the L parameter.
* @param OldArc The old arc.
*/
void go_on(int pos, char L, char* word, uint8_t* rack, ARC* NewArc,
ARC* OldArc, int spaces) {
#ifdef DEBUG_
print_spaces(spaces);
printf("in go_on, %d, Letter: %c, Word: %s,", pos, L, word);
print_rack(rack);
#endif
char word_c[16];
char word_copy[16];
word_c[0] = L;
word_c[1] = '\0';
if (pos <= 0) {
// word <- L || word
#ifdef DEBUG_
print_spaces(spaces);
printf("pos <= 0, here\n");
#endif
strcat(word_c, word);
// word_c now prepends word with L. Can I do this faster?
// IF L on oldArc & no letter directly left then RecordPlay
if (containsLetter(OldArc->destination, L)) {
// TODO - check if no letter directly left, this is also a
// required condition.
#ifdef DEBUG_
print_spaces(spaces);
printf("containsLetter(OldArc->destination, %c)\n", L);
#endif
record_play(word_c);
}
if (NewArc) {
#ifdef DEBUG_
print_spaces(spaces);
printf("New arc\n");
#endif
// If there is room to the left, Gen(pos-1, word, rack, NewArc)
// TODO, check if there is room to the left.
if (1) {
gen(pos - 1, word_c, rack, NewArc, spaces + 1);
}
NewArc = next_arc(NewArc, SEPARATION_TOKEN);
// Now shift direction.
if (NewArc) {
#ifdef DEBUG_
print_spaces(spaces);
printf("Switched direction\n");
#endif
// TODO check if there is no letter directly left, AND
// there is room to the right.
if (1) {
gen(1, word_c, rack, NewArc, spaces + 1);
}
}
}
} else if (pos > 0) {
#ifdef DEBUG_
print_spaces(spaces);
printf("pos > 0\n");
#endif
strcpy(word_copy, word);
strcat(word_copy, word_c);
if (containsLetter(OldArc->destination, L)) {
#ifdef DEBUG_
print_spaces(spaces);
printf("containsLetter(OldArc->destination, %c)\n", L);
#endif
// TODO check if no letter directly right.
if (1) {
record_play(word_copy);
}
}
if (NewArc) {
#ifdef DEBUG_
print_spaces(spaces);
printf("NewArc\n");
#endif
// TODO check if room to the right.
if (1) {
gen(pos + 1, word_copy, rack, NewArc, spaces + 1);
}
}
}
}