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- /* Copyright (c) 1989 Citadel */
- /* All Rights Reserved */
-
- /* #ident "@(#)lsgetcur.c 1.5 - 91/09/23" */
-
- #include <ansi.h>
-
- /* ansi headers */
- #include <errno.h>
- #ifdef AC_STRING
- #include <string.h>
- #endif
-
- /* library headers */
- #include <blkio.h>
-
- /* local headers */
- #include "lseq_.h"
-
- /*man---------------------------------------------------------------------------
- NAME
- lsgetcur - get lseq cursor
-
- SYNOPSIS
- #include <lseq.h>
-
- int lsgetcur(lsp, lsposp)
- lseq_t *lsp;
- lspos_t *lsposp;
-
- DESCRIPTION
- The lsgetcur function gets the current cursor position of lseq
- lsp and copies it to the location pointed to by lsposp. A lseq
- position saved with lsgetcur can be used to reposition to a
- record using lssetcur. It is important to remember that an lseq
- position saved with lsgetcur is not valid after that lseq has
- been unlocked.
-
- lsgetcur will fail if one or more of the following is true:
-
- [EINVAL] lsp is not a valid lseq pointer.
- [EINVAL] lsposp is the NULL pointer.
- [LSELOCK] lsp is not locked.
- [LSENOPEN] lsp is not open.
-
- SEE ALSO
- lssetcur.
-
- DIAGNOSTICS
- Upon successful completion, a value of 0 is returned. Otherwise,
- a value of -1 is returned, and errno set to indicate the error.
-
- ------------------------------------------------------------------------------*/
- #ifdef AC_PROTO
- int lsgetcur(lseq_t *lsp, lspos_t *lsposp)
- #else
- int lsgetcur(lsp, lsposp)
- lseq_t *lsp;
- lspos_t *lsposp;
- #endif
- {
- /* validate arguments */
- if (!ls_valid(lsp) || lsposp == NULL) {
- errno = EINVAL;
- return -1;
- }
-
- /* check if not open */
- if (!(lsp->flags & LSOPEN)) {
- errno = EINVAL;
- return -1;
- }
-
- /* check if not read locked */
- if (!(lsp->flags & LSLOCKS)) {
- errno = LSELOCK;
- return -1;
- }
-
- /* get current position */
- memcpy(lsposp, &lsp->clspos, sizeof(lsp->clspos));
-
- return 0;
- }