int array_prepend (str_array_t *a, const char *entry);
int array_prepend_format (str_array_t *a, const char *format, ...)
__attribute__((format(printf,2,3)));
int array_prepend (str_array_t *a, const char *entry);
int array_prepend_format (str_array_t *a, const char *format, ...)
__attribute__((format(printf,2,3)));