time_t mutt_parse_date (const char *, HEADER *);
int is_from (const char *, char *, ssize_t, time_t *);
-char *mutt_charset_hook (const char *);
-char *mutt_iconv_hook (const char *);
+const char *mutt_charset_hook (const char *);
+const char *mutt_iconv_hook (const char *);
char *mutt_expand_path (char *, ssize_t);
char *_mutt_expand_path (char *, ssize_t, int);
char *mutt_find_hook (int, const char *);
char *mutt_get_body_charset (char *, ssize_t, BODY *);
const char *mutt_get_name (address_t *);
char *mutt_get_parameter (const char *, PARAMETER *);
-char *mutt_crypt_hook (address_t *);
+const char *mutt_crypt_hook (address_t *);
char *mutt_make_date (char *, ssize_t);
const char *mutt_make_version (int full);