1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* This is a copy from upstream:
* https://chromium.googlesource.com/chromiumos/platform/vpd/+/master/include/lib/vpd_decode.h
*/
#ifndef __VPD_DECODE_H
#define __VPD_DECODE_H
#include <stdint.h>
enum {
VPD_DECODE_OK = 0,
VPD_DECODE_FAIL = 1,
};
enum {
VPD_TYPE_TERMINATOR = 0,
VPD_TYPE_STRING,
VPD_TYPE_INFO = 0xfe,
VPD_TYPE_IMPLICIT_TERMINATOR = 0xff,
};
/* Callback for vpd_decode_string to invoke. */
typedef int vpd_decode_callback(
const u8 *key, u32 key_len, const u8 *value, u32 value_len,
void *arg);
/*
* vpd_decode_len
*
* Given an encoded string, this function extracts the length of content
* (either key or value). The *consumed will contain the number of bytes
* consumed.
*
* The input_buf points to the first byte of the input buffer.
*
* The *consumed starts from 0, which is actually the next byte to be decoded.
* It can be non-zero to be used in multiple calls.
*
* Returns VPD_DECODE_OK on success, otherwise VPD_DECODE_FAIL.
*/
int vpd_decode_len(
const u32 max_len, const u8 *in, u32 *length, u32 *decoded_len);
/*
* vpd_decode_string
*
* Given the encoded string, this function invokes callback with extracted
* (key, value). The *consumed will be plused the number of bytes consumed in
* this function.
*
* The input_buf points to the first byte of the input buffer.
*
* The *consumed starts from 0, which is actually the next byte to be decoded.
* It can be non-zero to be used in multiple calls.
*
* If one entry is successfully decoded, sends it to callback and returns the
* result.
*/
int vpd_decode_string(
const u32 max_len, const u8 *input_buf, u32 *consumed,
vpd_decode_callback callback, void *callback_arg);
#endif /* __VPD_DECODE_H */
|
