/**************************************************************/

/*  tpax: a topological pax implementation                    */

/*  Copyright (C) 2020--2024  SysDeer Technologies, LLC       */

/*  Released under GPLv2 and GPLv3; see COPYING.TPAX.         */

/**************************************************************/

#include <stdint.h>

#include <stdlib.h>

#include <tpax/tpax.h>

#include "tpax_driver_impl.h"

#include "tpax_errinfo_impl.h"

#include "tpax_visibility_impl.h"

tpax_hidden int tpax_update_queue_vector(const struct tpax_driver_ctx * dctx)

{

	uintptr_t                       addr;

	struct tpax_driver_ctx_impl *   ictx;

	struct tpax_dirent_buffer *     dentbuf;

	struct tpax_dirent **           direntv;

	struct tpax_dirent *            cdent;

	struct tpax_dirent *            cnext;

	size_t                          arrsize;

	/* driver */

	ictx = tpax_get_driver_ictx(dctx);

	/* vector alloc */

	if (ictx->direntv)

		free(ictx->direntv);

	arrsize = ictx->nqueued + 1;

	if (!(ictx->direntv = calloc(arrsize,sizeof(struct tpax_dirent *))))

		return TPAX_SYSTEM_ERROR(dctx);

	if (ictx->nqueued == 0)

		return 0;

	/* queue vector */

	dentbuf = tpax_get_driver_dirents(dctx);

	cdent   = dentbuf->dbuf;

	for (direntv=ictx->direntv; cdent; direntv++) {

		*direntv = cdent;

		addr  = (uintptr_t)cdent;

		addr += cdent->nsize;

		cnext = (struct tpax_dirent *)addr;

		if (cnext == dentbuf->cdent) {

			dentbuf = dentbuf->next;

			cnext   = dentbuf ? dentbuf->dbuf : 0;

		}

		cdent = cnext;

	}

	return 0;

}