libutils/isoc/bget.c

507 struct bhead {  struct
514 #define BH(p)	((struct bhead *) (p))  argument
521     struct bhead bh;		      /* Common header */
528     struct bhead bh;		      /* Common allocated/free header */
593     buf = (unsigned long)bf + bf->bh.bsize - size + sizeof(struct bhead) +  in buf_get_pos()
596     pos = buf - (unsigned long)bf - sizeof(struct bhead) - hdr_size;  in buf_get_pos()
600     if (pos >= SizeQ + sizeof(struct bhead)) /* room for an empty buffer */  in buf_get_pos()
693     if (ADD_OVERFLOW(size, sizeof(struct bhead), &size))
732                 struct bhead *b_alloc = BH((char *)b + pos);
733                 struct bhead *b_next = BH((char *)b + b->bh.bsize);
775                 if (-b_alloc->bsize - size > SizeQ + sizeof(struct bhead)) {
804                 buf = (char *)b_alloc + sizeof(struct bhead);
832 	    size += sizeof(struct bdhead) - sizeof(struct bhead);
901 	struct bhead *b;
904 	b = BH(buf - sizeof(struct bhead));
912 	    rsize -= sizeof(struct bhead);
934     struct bhead *b;
942     b = BH(((char *) buf) - sizeof(struct bhead));
953 	osize -= sizeof(struct bhead);
980     b = BFH(((char *) buf) - sizeof(struct bhead));
1121 	((bufsize) b->bh.bsize) == (pool_len - sizeof(struct bhead))) {
1166     struct bhead *bn;
1188     assert(len - sizeof(struct bhead) <= -((bufsize) ESent + 1));
1213     len -= sizeof(struct bhead);
1286     b = BFH(((char *) buf) - sizeof(struct bhead));
1290 	bdlen = (-b->bh.bsize) - sizeof(struct bhead);
1353 		bufdump((void *) (((char *) b) + sizeof(struct bhead)));
1372 		bufdump((void *) (((char *) b) + sizeof(struct bhead)));
1376 		bufdump((void *) (((char *) b) + sizeof(struct bhead)));
1420 		bufdump((void *) (((char *) b) + sizeof(struct bhead)));