CA fails on big-endian host

From Yevgeny A. Gusev,

     ca_array_put_callback() doesn't work correctly if IOC is located in PPC-based controller. The problem is in caNetConvert() routine from base-3.14.9/src/ca/convert.cpp which is called by write_notify_action() (and by other routines) from base-3.14.9/src/rsrv/camessage.c.

base-3.14.9/src/ca/convert.cpp:

int caNetConvert ( unsigned type, const void *pSrc, void *pDest,
                    int hton, arrayElementCount count ) {
# ifdef EPICS_CONVERSION_REQUIRED
         if ( type >= NELEMENTS ( cac_dbr_cvrt ) ) {
             return ECA_BADTYPE;
         }
         ( * cac_dbr_cvrt [ type ] ) ( pSrc, pDest, hton, count );
# else
         if ( INVALID_DB_REQ ( type ) ) {
             return ECA_BADTYPE;
         }
         if ( pSrc != pDest ) {
             memcpy ( pDest, pSrc, count );
         }
# endif
     return ECA_NORMAL;
}

     The third argument in memcpy() must be not count but dbr_size_n( type, count ) - size in bytes, so instead of

     memcpy( pDest, pSrc, count )

must be

     memcpy( pDest, pSrc, dbr_size_n( type, count ) ).

     Please check also cvrt_gr_char(), cvrt_ctrl_char(), cvrt_sts_char() and cvrt_time_char() routines from ca/convert.cpp where num (number of
values) is used in memcpy() calls.

Original Mantis Bug: mantis-288
    http://www.aps.anl.gov/epics/mantis/view_bug_page.php?f_id=288