Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #include <internal/xyarray.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <linux/zalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) struct xyarray *xyarray__new(int xlen, int ylen, size_t entry_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	size_t row_size = ylen * entry_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	struct xyarray *xy = zalloc(sizeof(*xy) + xlen * row_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	if (xy != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 		xy->entry_size = entry_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		xy->row_size   = row_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 		xy->entries    = xlen * ylen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 		xy->max_x      = xlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		xy->max_y      = ylen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	return xy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) void xyarray__reset(struct xyarray *xy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	size_t n = xy->entries * xy->entry_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	memset(xy->contents, 0, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) void xyarray__delete(struct xyarray *xy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	free(xy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }