41  * @box: Index of byte within buffer seen as a logical big-endian big number
46  * the physical offset of the @box logical octet within it. Internally, it
59  * Return: the physical offset into the buffer corresponding to the logical box.
61 static size_t calculate_box_addr(size_t box, size_t len, u8 quirks)  in calculate_box_addr()  argument
63 	size_t offset_of_group, offset_in_group, this_group = box / 4;  in calculate_box_addr()
74 		offset_in_group = box - this_group * 4;  in calculate_box_addr()
76 		offset_in_group = group_size - (box - this_group * 4) - 1;  in calculate_box_addr()
90 	int box;  in __pack()  local
102 	 * logical bit significance. "box" denotes the current logical u8.  in __pack()
104 	for (box = plogical_first_u8; box >= plogical_last_u8; box--) {  in __pack()
105 		/* Bit indices into the currently accessed 8-bit box */  in __pack()
117 		if (box == plogical_first_u8)  in __pack()
121 		if (box == plogical_last_u8)  in __pack()
126 		/* We have determined the box bit start and end.  in __pack()
127 		 * Now we calculate where this (masked) u8 box would fit  in __pack()
128 		 * in the unpacked (CPU-readable) u64 - the u8 box's  in __pack()
130 		 * box is u8, the projection is u64 because it may fall  in __pack()
133 		proj_start_bit = ((box * BITS_PER_BYTE) + box_start_bit) - endbit;  in __pack()
134 		proj_end_bit = ((box * BITS_PER_BYTE) + box_end_bit) - endbit;  in __pack()
138 		/* Determine the offset of the u8 box inside the pbuf,  in __pack()
143 		box_addr = calculate_box_addr(box, pbuflen, quirks);  in __pack()
206 	int box;  in __unpack()  local
213 	 * logical bit significance. "box" denotes the current logical u8.  in __unpack()
215 	for (box = plogical_first_u8; box >= plogical_last_u8; box--) {  in __unpack()
216 		/* Bit indices into the currently accessed 8-bit box */  in __unpack()
228 		if (box == plogical_first_u8)  in __unpack()
232 		if (box == plogical_last_u8)  in __unpack()
237 		/* We have determined the box bit start and end.  in __unpack()
238 		 * Now we calculate where this (masked) u8 box would fit  in __unpack()
239 		 * in the unpacked (CPU-readable) u64 - the u8 box's  in __unpack()
241 		 * box is u8, the projection is u64 because it may fall  in __unpack()
244 		proj_start_bit = ((box * BITS_PER_BYTE) + box_start_bit) - endbit;  in __unpack()
245 		proj_end_bit = ((box * BITS_PER_BYTE) + box_end_bit) - endbit;  in __unpack()
249 		/* Determine the offset of the u8 box inside the pbuf,  in __unpack()
254 		box_addr = calculate_box_addr(box, pbuflen, quirks);  in __unpack()