bsd/hfs/hfs_vnops.c

4928 	struct cat_fork datafork;
4992         /* copy the datafork into a temporary copy so we don't pollute the cnode's */
4993         bcopy(dataforkp, &datafork, sizeof(datafork));
4994         dataforkp = &datafork;
5010             datafork.cf_blocks = (cp->c_datafork->ff_blocks - cp->c_datafork->ff_unallocblocks);
5011             datafork.cf_size   = datafork.cf_blocks * HFSTOVCB(hfsmp)->blockSize;
5027             datafork.cf_size = MIN((numbytes), (datafork.cf_size));