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

cde/programs/nsgmls/SubstTable.C

@@ -0,0 +1,90 @@
+/* $XConsortium: SubstTable.C /main/1 1996/07/29 17:05:48 cde-hp $ */
+// Copyright (c) 1994 James Clark
+// See the file COPYING for copying permission.
+
+#ifndef SubstTable_DEF_INCLUDED
+#define SubstTable_DEF_INCLUDED 1
+
+#ifdef SP_NAMESPACE
+namespace SP_NAMESPACE {
+#endif
+
+template<class T>
+SubstTable<T>::SubstTable()
+: pairsValid_(1)
+{
+}
+
+template<class T>
+void SubstTable<T>::addSubst(T from, T to)
+{
+  if (table_.size() == 0) {
+    table_.resize(T(-1) + 1);
+    for (int i = 0; i < T(-1) + 1; i++)
+      table_[i] = i;
+  }
+  if (table_[from] != to)
+    pairsValid_ = 0;
+  table_[from] = to;
+}
+
+template<class T>
+String<T> SubstTable<T>::inverse(T ch) const
+{
+  if (!pairsValid_) {
+    const T *p = table_.data();
+    size_t length = table_.size();
+    for (size_t i = 0; i < length; i++)
+      if (p[i] != i) {
+	// FIXME use mutable if available
+	((SubstTable<T> *)this)->pairs_ += T(i);
+	((SubstTable<T> *)this)->pairs_ += p[i];
+      }
+    ((SubstTable<T> *)this)->pairsValid_ = 1;
+  }
+  const T *p = pairs_.data();
+  if (!p)
+    return String<T>(&ch, 1);
+  String<T> result;
+  if (table_[ch] == ch)
+    result += ch;
+  for (size_t n = pairs_.size(); n > 0; n -= 2, p += 2)
+    if (p[1] == ch)
+      result += p[0];
+  return result;
+}
+
+template<class T>
+void SubstTable<T>::inverseTable(SubstTable<T> &inv) const
+{
+  if (table_.size() == 0) {
+    inv.table_.resize(0);
+    inv.pairs_.resize(0);
+    inv.pairsValid_ = 1;
+  }
+  else {
+    if (inv.table_.size() == 0)
+      inv.table_.resize(T(-1) + 1);
+    int i;
+    for (i = 0; i < T(-1) + 1; i++)
+      inv.table_[i] = i;
+    inv.pairs_.resize(0);
+    inv.pairsValid_ = 0;
+    for (i = 0; i < T(-1) + 1; i++)
+      if (table_[i] != i)
+	inv.table_[table_[i]] = i;
+  }
+}
+
+template<class T>
+void SubstTable<T>::subst(String<T> &str) const
+{
+  for (size_t i = 0; i < str.size(); i++)
+    subst(str[i]);
+}
+
+#ifdef SP_NAMESPACE
+}
+#endif
+
+#endif /* not SubstTable_DEF_INCLUDED */