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

cde/programs/nsgmls/Trie.h

@@ -0,0 +1,71 @@
+/* $XConsortium: Trie.h /main/1 1996/07/29 17:06:38 cde-hp $ */
+// Copyright (c) 1994 James Clark
+// See the file COPYING for copying permission.
+
+#ifndef Trie_INCLUDED
+#define Trie_INCLUDED 1
+
+#include <limits.h>
+#include "types.h"
+#include "Boolean.h"
+#include "Vector.h"
+#include "CopyOwner.h"
+#include "Priority.h"
+
+#ifdef SP_NAMESPACE
+namespace SP_NAMESPACE {
+#endif
+
+class BlankTrie;
+
+class Trie {
+public:
+  Trie() : next_(0), nCodes_(0) { }
+  Trie(const Trie &);
+  ~Trie();
+  Trie &operator=(const Trie &);
+  const Trie *next(int i) const { return &next_[i]; }
+  Boolean hasNext() const { return next_ != 0; }
+  Token token() const { return token_; }
+  int tokenLength() const { return tokenLength_; }
+  const BlankTrie *blank() const;
+  Boolean includeBlanks() const {
+    return Priority::isBlank(priority_);
+  }
+  friend class TrieBuilder;
+private:
+  Trie *next_;
+  int nCodes_;
+  unsigned short token_;
+  unsigned char tokenLength_;
+  Priority::Type priority_;
+  CopyOwner<BlankTrie> blank_;
+};
+
+class BlankTrie : public Trie {
+public:
+  BlankTrie() { }
+  Boolean codeIsBlank(EquivCode c) const { return codeIsBlank_[c]; }
+  // maximum number of blanks to scan (minimum is 0)
+  size_t maxBlanksToScan() const { return maxBlanksToScan_; }
+  // length to add to tokenLengths in this trie (for those > 0).
+  int additionalLength() const { return additionalLength_; }
+  BlankTrie *copy() const { return new BlankTrie(*this); }
+private:
+  unsigned char additionalLength_;
+  size_t maxBlanksToScan_;
+  Vector<PackedBoolean> codeIsBlank_;
+  friend class TrieBuilder;
+};
+
+inline
+const BlankTrie *Trie::blank() const
+{
+  return blank_.pointer();
+}
+
+#ifdef SP_NAMESPACE
+}
+#endif
+
+#endif /* not Trie_INCLUDED */