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

cde/programs/nsgmls/RewindStorageObject.h

@@ -0,0 +1,46 @@
+/* $XConsortium: RewindStorageObject.h /main/1 1996/07/29 17:03:03 cde-hp $ */
+#ifndef RewindStorageObject_INCLUDED
+#define RewindStorageObject_INCLUDED 1
+
+#include "StorageManager.h"
+#include "Boolean.h"
+#include "StringOf.h"
+
+#ifdef SP_NAMESPACE
+namespace SP_NAMESPACE {
+#endif
+
+class Messenger;
+
+class SP_API RewindStorageObject : public StorageObject {
+public:
+  RewindStorageObject(Boolean mayRewind, Boolean canSeek);
+protected:
+  PackedBoolean mayRewind_;
+
+  void saveBytes(const char *, size_t);
+  Boolean readSaved(char *, size_t, size_t &);
+  Boolean rewind(Messenger &);
+  void willNotRewind();
+  void unread(const char *s, size_t n);
+  virtual Boolean seekToStart(Messenger &) = 0;
+private:
+  PackedBoolean savingBytes_;
+  PackedBoolean readingSaved_;
+  PackedBoolean canSeek_;
+  String<char> savedBytes_;
+  size_t nBytesRead_;
+};
+
+inline
+void RewindStorageObject::saveBytes(const char *s, size_t n)
+{
+  if (savingBytes_)
+    savedBytes_.append(s, n);
+}
+
+#ifdef SP_NAMESPACE
+}
+#endif
+
+#endif /* not RewindStorageObject_INCLUDED */