1 /*
2 * Copyright (c) 2023 Intel Corporation
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 */
7
8 #include <zephyr/llext/buf_loader.h>
9 #include <zephyr/sys/util.h>
10 #include <string.h>
11
llext_buf_read(struct llext_loader * l,void * buf,size_t len)12 int llext_buf_read(struct llext_loader *l, void *buf, size_t len)
13 {
14 struct llext_buf_loader *buf_l = CONTAINER_OF(l, struct llext_buf_loader, loader);
15 size_t end = MIN(buf_l->pos + len, buf_l->len);
16 size_t read_len = end - buf_l->pos;
17
18 memcpy(buf, buf_l->buf + buf_l->pos, read_len);
19 buf_l->pos = end;
20
21 return 0;
22 }
23
llext_buf_seek(struct llext_loader * l,size_t pos)24 int llext_buf_seek(struct llext_loader *l, size_t pos)
25 {
26 struct llext_buf_loader *buf_l = CONTAINER_OF(l, struct llext_buf_loader, loader);
27
28 buf_l->pos = MIN(pos, buf_l->len);
29
30 return 0;
31 }
32
llext_buf_peek(struct llext_loader * l,size_t pos)33 void *llext_buf_peek(struct llext_loader *l, size_t pos)
34 {
35 struct llext_buf_loader *buf_l = CONTAINER_OF(l, struct llext_buf_loader, loader);
36
37 return (void *)(buf_l->buf + pos);
38 }
39
