al_get_index_buffer_size(3)                           Library Functions Manual

NAME
       al_get_index_buffer_size - Allegro 5 API

SYNOPSIS
              #include <allegro5/allegro_primitives.h>

              int al_get_index_buffer_size(ALLEGRO_INDEX_BUFFER* buffer)

DESCRIPTION
       Returns the size of the index buffer

SINCE
       5.1.8

SEE ALSO
       ALLEGRO_INDEX_BUFFER(3)

Allegro reference manual                           al_get_index_buffer_size(3)