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

cde/programs/dthelp/parser/pass1/util/trie.h

@@ -0,0 +1,54 @@
+/* $XConsortium: trie.h /main/3 1995/11/08 10:37:32 rswiston $ */
+/*
+                   Copyright 1986, 1987, 1988, 1989 Hewlett-Packard Co.
+*/
+
+/* Trie.h contains definitions relating to trees used to store
+   element names, delimiter strings, short reference strings, etc. */
+
+/* The data structure described here is not a true trie as described
+   in Knuth, Vol. 3.  These functions represent entries by a tree
+   structure in which there is one level of subnode for each letter
+   in an entry.  In a trie, subnodes are not needed as soon as a
+   unique prefix has been encountered. */
+
+typedef struct m_trie M_TRIE ;
+
+typedef struct m_ptrie M_PTRIE ;
+
+struct m_trie {
+  M_WCHAR symbol ;
+  M_TRIE *next ;
+  M_TRIE *data ;
+  } ;
+
+struct m_ptrie {
+  LOGICAL more ;
+  M_WCHAR symbol ;
+  int index ;
+  } ;
+
+
+M_TRIE *m_gettrienode(
+#if defined(M_PROTO)
+  M_NOPAR
+#endif
+  ) ;
+
+void *m_lookfortrie(
+#if defined(M_PROTO)
+  const M_WCHAR *p, const M_TRIE *xtrie
+#endif
+  ) ;
+
+void *m_ntrtrie(
+#if defined(M_PROTO)
+  M_WCHAR *p, M_TRIE *xtrie, void *dataval
+#endif
+  ) ;
+
+void *m_resettrie(
+#if defined(M_PROTO)
+  M_TRIE *xtrie, M_WCHAR *p, void *value
+#endif
+  ) ;