2
* Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
3
* Redistribution and modifications are permitted subject to BSD license.
5
#ifndef _BER_TLV_TAG_H_
6
#define _BER_TLV_TAG_H_
13
ASN_TAG_CLASS_UNIVERSAL = 0, /* 0b00 */
14
ASN_TAG_CLASS_APPLICATION = 1, /* 0b01 */
15
ASN_TAG_CLASS_CONTEXT = 2, /* 0b10 */
16
ASN_TAG_CLASS_PRIVATE = 3 /* 0b11 */
18
typedef unsigned ber_tlv_tag_t; /* BER TAG from Tag-Length-Value */
21
* Tag class is encoded together with tag value for optimization purposes.
23
#define BER_TAG_CLASS(tag) ((tag) & 0x3)
24
#define BER_TAG_VALUE(tag) ((tag) >> 2)
25
#define BER_TLV_CONSTRUCTED(tagptr) (((*(const uint8_t *)tagptr)&0x20)?1:0)
27
#define BER_TAGS_EQUAL(tag1, tag2) ((tag1) == (tag2))
30
* Several functions for printing the TAG in the canonical form
31
* (i.e. "[PRIVATE 0]").
32
* Return values correspond to their libc counterparts (if any).
34
ssize_t ber_tlv_tag_snprint(ber_tlv_tag_t tag, char *buf, size_t buflen);
35
ssize_t ber_tlv_tag_fwrite(ber_tlv_tag_t tag, FILE *);
36
char *ber_tlv_tag_string(ber_tlv_tag_t tag);
40
* This function tries to fetch the tag from the input stream.
42
* 0: More data expected than bufptr contains.
43
* -1: Fatal error deciphering tag.
44
* >0: Number of bytes used from bufptr. tag_r will contain the tag.
46
ssize_t ber_fetch_tag(const void *bufptr, size_t size, ber_tlv_tag_t *tag_r);
49
* This function serializes the tag (T from TLV) in BER format.
50
* It always returns number of bytes necessary to represent the tag,
51
* it is a caller's responsibility to check the return value
52
* against the supplied buffer's size.
54
size_t ber_tlv_tag_serialize(ber_tlv_tag_t tag, void *bufptr, size_t size);
60
#endif /* _BER_TLV_TAG_H_ */
added
removed
asn1/ber_tlv_tag.h
