fmt_asn1dertag(3)fmt_asn1dertag(3)NAME
fmt_asn1dertag - encode unsigned integer like ASN.1 DER tag
SYNTAX
#include <fmt.h>
size_t fmt_asn1dertag(char *dest,unsigned long long source);
DESCRIPTION
fmt_asn1dertag encodes an unsigned integer using the ASN.1 DER for
encoding tag. This takes one byte for every 7 bits in the number.
If dest equals FMT_LEN (i.e. is NULL), fmt_asn1dertag returns the num‐
ber of bytes it would have written.
For convenience, fmt.h defines the integer FMT_ASN1TAG to be big enough
to contain every possible fmt_asn1dertag output.
SEE ALSOscan_asn1dertag(3)fmt_asn1dertag(3)