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  1. .TH fmt_asn1dertag 3
  2. .SH NAME
  3. fmt_asn1dertag \- encode unsigned integer like ASN.1 DER tag
  4. .SH SYNTAX
  5. .B #include <libowfat/fmt.h>
  6. size_t \fBfmt_asn1dertag\fP(char *\fIdest\fR,unsigned long long \fIsource\fR);
  7. .SH DESCRIPTION
  8. fmt_asn1dertag encodes an unsigned integer using the ASN.1 DER for
  9. encoding tag. This takes one byte for every 7 bits in the number.
  10. If \fIdest\fR equals FMT_LEN (i.e. is NULL), fmt_asn1dertag returns the
  11. number of bytes it would have written.
  12. For convenience, fmt.h defines the integer FMT_ASN1TAG to be big
  13. enough to contain every possible fmt_asn1dertag output.
  14. .SH "SEE ALSO"
  15. scan_asn1dertag(3)