ref: db21cace325cdc6468b3921a07cf92e38f0cf2a7
dir: /sbuf.h/
/* variable length string buffer */ struct sbuf *sbuf_make(void); void sbuf_free(struct sbuf *sb); char *sbuf_done(struct sbuf *sb); void sbuf_str(struct sbuf *sbuf, char *s); void sbuf_mem(struct sbuf *sbuf, char *s, int len); char *sbuf_buf(struct sbuf *sb); void sbuf_printf(struct sbuf *sbuf, char *s, ...);