-static const char *subanagram_anagram;
-static char subanagram_enumerate_word[WORD_GAME_MAX_WORD_LENGTH];
-static dict_t *subanagram_enumerate_answers;
-
-static void
-subanagram_enumerate (dict_cursor_t cursor,
- uint8_t seen)
-{
- char c;
- unsigned int i, last;
- uint8_t next_seen;
-
- if (cursor == DICT_CURSOR_NIL)
- return;
-
- if (DICT_ENTRY_IS_WORD (dict_cursor_resolve (cursor)))
- dict_add_word (subanagram_enumerate_answers, subanagram_enumerate_word);
-
- last = strlen (subanagram_enumerate_word);
-
- for (i = 0; i < strlen (subanagram_anagram); i++) {
- if (seen & (1 << i))
- continue;
- next_seen = seen | (1 << i);
- c = subanagram_anagram[i];
- if (c == '?' || c == '_') {
- for (c = 'a'; c <= 'z'; c++) {
- subanagram_enumerate_word[last] = c;
- subanagram_enumerate (dict_cursor_next (cursor, c), next_seen);
- }
- } else {
- subanagram_enumerate_word[last] = c;
- subanagram_enumerate (dict_cursor_next (cursor, c), next_seen);
- }
- subanagram_enumerate_word[last] = '\0';
- }
-}
-
-static void
-subanagram_expand (const char *anagram, dict_t *dict, dict_t *answers)
-{
- subanagram_anagram = anagram;
- memset (subanagram_enumerate_word, '\0', WORD_GAME_MAX_WORD_LENGTH);
- subanagram_enumerate_answers = answers;
-
- subanagram_enumerate (dict_root (dict), 0);
-}
-