Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/DtSearch/raima/findpm.c

@@ -0,0 +1,79 @@
+/* $XConsortium: findpm.c /main/2 1996/05/09 04:06:57 drk $ */
+/*
+ *   COMPONENT_NAME: austext
+ *
+ *   FUNCTIONS: d_findpm
+ *
+ *   ORIGINS: 157
+ *
+ *   OBJECT CODE ONLY SOURCE MATERIALS
+ */
+/*-----------------------------------------------------------------------
+   findpm.c -- db_VISTA find previous member module
+
+   (C) Copyright 1987 by Raima Corp.
+-----------------------------------------------------------------------*/
+
+/* ********************** EDIT HISTORY *******************************
+
+ SCR    DATE    INI                   DESCRIPTION
+----- --------- --- -----------------------------------------------------
+      04-Aug-88 RTK MULTI_TASK changes
+*/
+
+#include <stdio.h>
+#include "vista.h"
+#include "dbtype.h"
+
+/* Find previous member of set
+*/
+d_findpm(nset TASK_PARM DBN_PARM)
+int nset;
+TASK_DECL
+DBN_DECL
+{
+   int set;
+   char memp[MEMPSIZE];
+   DB_ADDR mem;
+   char FAR *recp;
+   DB_ADDR FAR *cm_ptr;
+   SET_ENTRY FAR *set_ptr;
+
+   DB_ENTER(DB_ID TASK_ID LOCK_SET(SET_IO));
+
+   if (nset_check(nset, &set, (SET_ENTRY FAR * FAR *)&set_ptr) != S_OKAY)
+      RETURN( db_status );
+
+   /* make sure we have a current owner */
+   if ( ! curr_own[set] )
+      RETURN( dberr(S_NOCO) );
+
+   /* find last member if no current member */
+   if ( !*(cm_ptr = &curr_mem[set]) )
+      RETURN( d_findlm(nset TASK_PARM DBN_PARM) );
+
+   /* read current member of set and get member pointer from record */
+   if ((dio_read(*cm_ptr, (char FAR * FAR *)&recp, NOPGHOLD) != S_OKAY) ||
+       (r_gmem(set, recp, memp) != S_OKAY))
+      RETURN( db_status );
+
+   /* extract address of previous member */
+   bytecpy( &mem, memp+MP_PREV, DB_ADDR_SIZE);
+
+   /* set current record and member */
+   *cm_ptr = mem;
+
+   if ( ! mem ) /* end of set */
+      RETURN( db_status = S_EOS );
+
+   curr_rec = mem;
+#ifndef	 NO_TIMESTAMP
+   /* set timestamps */
+   if ( db_tsrecs ) {
+      d_utscr( &cr_time TASK_PARM );
+      cm_time[set] = cr_time;
+   }
+#endif
+   RETURN( db_status = S_OKAY );
+}
+/* vpp -nOS2 -dUNIX -nBSD -nVANILLA_BSD -nVMS -nMEMLOCK -nWINDOWS -nFAR_ALLOC -f/usr/users/master/config/nonwin findpm.c */