data.c

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/* DATA core */

#include "fb.h"

FB_DATADESC *__fb_data_ptr = NULL;

static void hSkipLink( void )
{
        /* If a link was reached, move to the next non-link, or NULL ("EOF") */
        while( __fb_data_ptr && (__fb_data_ptr->len == FB_DATATYPE_LINK) ) {
                __fb_data_ptr = __fb_data_ptr->next;
        }

        DBG_ASSERT( (__fb_data_ptr == NULL) ||
                    (__fb_data_ptr->len != FB_DATATYPE_LINK) );
}

FBCALL void fb_DataRestore( FB_DATADESC *labeladdr )
{
        FB_LOCK();

        __fb_data_ptr = labeladdr;
        hSkipLink( );

        FB_UNLOCK();
}

/* Callers are expected to FB_LOCK/FB_UNLOCK */
void fb_DataNext( void )
{
        /* Move forward in current DATA table, if any */
        if( __fb_data_ptr ) {
                DBG_ASSERT( __fb_data_ptr->len != FB_DATATYPE_LINK );
                __fb_data_ptr += 1;
                hSkipLink( );
        }
}