asn1\_number\_of\_elements(3) libtasn1 asn1\_number\_of\_elements(3)

# [NAME](#NAME)

asn1\_number\_of\_elements - API function

# [SYNOPSIS](#SYNOPSIS)

**#include <libtasn1.h>**

**int asn1\_number\_of\_elements(asn1\_node\_const element, const char * name, int * num);**

# [ARGUMENTS](#ARGUMENTS)

[asn1\_node\_const element](#asn1_node_const)

pointer to the root of an ASN1 structure.

[const char * name](#const)

the name of a sub-structure of ROOT.

[int * num](#int)

pointer to an integer where the result will be stored

# [DESCRIPTION](#DESCRIPTION)

Counts the number of elements of a sub-structure called NAME with names equal to "?1","?2", ...

# [RETURNS](#RETURNS)

**ASN1\_SUCCESS** if successful, **ASN1\_ELEMENT\_NOT\_FOUND** if  
*name* is not known, **ASN1\_GENERIC\_ERROR** if pointer *num* is **NULL**.

# [COPYRIGHT](#COPYRIGHT)

Copyright © 2006-2025 Free Software Foundation, Inc..  
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

# [SEE ALSO](#SEE_ALSO)

The full documentation for **libtasn1** is maintained as a Texinfo manual. If the **info** and **libtasn1** programs are properly installed at your site, the command

**info libtasn1**

should give you access to the complete manual. As an alternative you may obtain the manual from:

**https://www.gnu.org/software/libtasn1/manual/**

4.21.0 libtasn1

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Document: asn1_number_of_elements(3) from libtasn1 4.21.0-r7 (Chainguard OS)
Source: https://gitlab.com/gnutls/libtasn1