home *** CD-ROM | disk | FTP | other *** search
- head 1.1;
- access ;
- symbols ;
- locks ; strict;
- comment @ * @;
-
-
- 1.1
- date 88.06.20.09.30.23; author ouster; state Exp;
- branches ;
- next ;
-
-
- desc
- @@
-
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @/*
- * Hash_EnumNext.c --
- *
- * Source code for the Hash_EnumNext library procedure.
- *
- * Copyright 1988 Regents of the University of California
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: proto.c,v 1.2 88/03/11 08:39:08 ouster Exp $ SPRITE (Berkeley)";
- #endif not lint
-
- #include "hash.h"
- #include "list.h"
-
- /*
- *---------------------------------------------------------
- *
- * Hash_EnumNext --
- * This procedure returns successive entries in the hash table.
- *
- * Results:
- * The return value is a pointer to the next HashEntry
- * in the table, or NULL when the end of the table is
- * reached.
- *
- * Side Effects:
- * The information in hashSearchPtr is modified to advance to the
- * next entry.
- *
- *---------------------------------------------------------
- */
-
- Hash_Entry *
- Hash_EnumNext(hashSearchPtr)
- register Hash_Search *hashSearchPtr; /* Area used to keep state about
- search. */
- {
- register List_Links *hashList;
- register Hash_Entry *hashEntryPtr;
-
- hashEntryPtr = hashSearchPtr->hashEntryPtr;
- while (hashEntryPtr == (Hash_Entry *) NULL ||
- List_IsAtEnd(hashSearchPtr->hashList,
- (List_Links *) hashEntryPtr)) {
- if (hashSearchPtr->nextIndex >= hashSearchPtr->tablePtr->size) {
- return((Hash_Entry *) NULL);
- }
- hashList = &(hashSearchPtr->tablePtr->bucketPtr[
- hashSearchPtr->nextIndex]);
- hashSearchPtr->nextIndex++;
- if (!List_IsEmpty(hashList)) {
- hashEntryPtr = (Hash_Entry *) List_First(hashList);
- hashSearchPtr->hashList = hashList;
- break;
- }
- }
-
- hashSearchPtr->hashEntryPtr =
- (Hash_Entry *) List_Next((List_Links *) hashEntryPtr);
-
- return(hashEntryPtr);
- }
- @
-