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

cde/lib/DtSearch/raima/keyexist.c

@@ -0,0 +1,64 @@
+/* $XConsortium: keyexist.c /main/2 1996/05/09 04:09:12 drk $ */
+/*
+ *   COMPONENT_NAME: austext
+ *
+ *   FUNCTIONS: d_keyexist
+ *
+ *   ORIGINS: 157
+ *
+ *   OBJECT CODE ONLY SOURCE MATERIALS
+ */
+
+/* ********************** EDIT HISTORY *******************************
+
+ SCR    DATE    INI                   DESCRIPTION
+----- --------- --- -----------------------------------------------------
+      04-Aug-88 RTK MULTI_TASK changes
+*/
+
+#include <stdio.h>
+#include "vista.h"
+#include "dbtype.h"
+
+
+/* Check for optional key existence
+*/
+d_keyexist(field TASK_PARM DBN_PARM)
+long field; /* key field constant */
+TASK_DECL
+DBN_DECL    /* database number */
+{
+   int fld;        /* field number */
+   int rec, rn;    /* record type of current record */
+   char FAR *rptr;     /* pointer to current record */
+   int stat;
+   RECORD_ENTRY FAR *rec_ptr;
+   FIELD_ENTRY FAR *fld_ptr;
+
+   DB_ENTER(DB_ID TASK_ID LOCK_SET(RECORD_IO));
+
+   if (nfld_check(field, &rec, &fld, (RECORD_ENTRY FAR * FAR *)&rec_ptr, (FIELD_ENTRY FAR * FAR *)&fld_ptr) != S_OKAY)
+      RETURN( db_status );
+
+   /* ensure current record is valid for this field */
+   d_crtype(&rn TASK_PARM DBN_PARM);
+
+   if (rec != NUM2INT(rn - RECMARK, rt_offset))
+      RETURN( dberr(S_BADFIELD) );
+
+   /* ensure field is an optional key field */
+   if ( ! (fld_ptr->fd_flags & OPTKEYMASK) )
+      RETURN( dberr(S_NOTOPTKEY) );
+
+   /* read current record */
+   if ( (stat = dio_read(curr_rec, (char FAR * FAR *)&rptr, NOPGHOLD)) == S_OKAY )  {
+      /* Check the bit map and return S_OKAY if already stored,
+	 else S_NOTFOUND */
+      if ((stat = r_tstopt(fld_ptr, rptr)) == S_OKAY)
+	 stat = S_NOTFOUND;
+      else if (stat == S_DUPLICATE)
+	 stat = S_OKAY;
+   }
+   RETURN( db_status = stat );
+}
+/* vpp -nOS2 -dUNIX -nBSD -nVANILLA_BSD -nVMS -nMEMLOCK -nWINDOWS -nFAR_ALLOC -f/usr/users/master/config/nonwin keyexist.c */