/* helper for when closing up (recursively) */
void trie_dispose(TrieNode* t)
{
int i;
if (t) {
for (i = 0; i < 26; i++)
trie_dispose(t->edges[i]);
free(t);
}
return;
}
int main(int argc, char **argv)
{
if (argc < 3) {
printf("Usage: scramble dict_file board_file\n");
return RESULT_INVALID_USAGE;
}
FILE *board_file = fopen(argv[2], "r");
char line[LINE_LENGTH];
int line_no = 0;
while (line_no < BOARD_HEIGHT && fgets(line, BOARD_WIDTH + 2, board_file)) {
for (size_t i = 0 ; i < BOARD_WIDTH ; ++i) {
if (!isalpha(line[i])) {
printf("all spaces must contain letters\n");
return RESULT_INVALID_BOARD;
}
line[i] = tolower(line[i]);
}
strncpy(board[line_no++], line, BOARD_WIDTH);
memset(line, 0, sizeof(line));
}
if (line_no < BOARD_HEIGHT) {
printf("you must provide %i lines\n", BOARD_HEIGHT);
return RESULT_INVALID_BOARD;
}
fclose(board_file);
FILE *dict_file = fopen(argv[1], "r");
dict_trie = trie_init();
while (fgets(line, LINE_LENGTH, dict_file)) {
/* remove trailing newlines before inserting into trie */
char *pos;
if ((pos = strchr(line, '\n'))) *pos = '\0';
trie_insert(dict_trie, line);
}
fclose(dict_file);
print_words();
trie_dispose(dict_trie);
return RESULT_SUCCESS;
}