void (*init)(lc_appendable_t *obj);
void (*finish)(lc_appendable_t *obj);
int (*snadd)(lc_appendable_t *obj, const char *str, size_t len);
void (*init)(lc_appendable_t *obj);
void (*finish)(lc_appendable_t *obj);
int (*snadd)(lc_appendable_t *obj, const char *str, size_t len);