Initial revision

1 files changed, 84 insertions, 0 deletions

diff --git a/pdf/xpdf/XRef.h b/pdf/xpdf/XRef.h
new file mode 100644
index 0000000..b843ea2
--- /dev/null
+++ b/pdf/xpdf/XRef.h
@@ -0,0 +1,84 @@
+//========================================================================
+//
+// XRef.h
+//
+// Copyright 1996 Derek B. Noonburg
+//
+//========================================================================
+
+#ifndef XREF_H
+#define XREF_H
+
+#ifdef __GNUC__
+#pragma interface
+#endif
+
+#include <stdio.h>
+#include "gtypes.h"
+#include "Object.h"
+
+class Dict;
+class FileStream;
+
+//------------------------------------------------------------------------
+// XRef
+//------------------------------------------------------------------------
+
+struct XRefEntry {
+  int offset;
+  int gen;
+  GBool used;
+};
+
+class XRef {
+public:
+
+  // Constructor.  Read xref table from stream.
+  XRef(FileStream *str);
+
+  // Destructor.
+  ~XRef();
+
+  // Is xref table valid?
+  GBool isOk() { return ok; }
+
+  // Is the file encrypted?
+  GBool isEncrypted() { return gFalse; }
+
+  // Are printing and copying allowed?  If not, print an error message.
+  GBool okToPrint();
+  GBool okToCopy();
+
+  // Get catalog object.
+  Object *getCatalog(Object *obj) { return fetch(rootNum, rootGen, obj); }
+
+  // Fetch an indirect reference.
+  Object *fetch(int num, int gen, Object *obj);
+
+  // Return the document's Info dictionary (if any).
+  Object *getDocInfo(Object *obj);
+
+private:
+
+  FILE *file;			// input file
+  int start;			// offset in file (to allow for garbage
+				//   at beginning of file)
+  XRefEntry *entries;		// xref entries
+  int size;			// size of <entries> array
+  int rootNum, rootGen;		// catalog dict
+  GBool ok;			// true if xref table is valid
+  Object trailerDict;		// trailer dictionary
+
+  int readTrailer(FileStream *str);
+  GBool readXRef(FileStream *str, int *pos);
+  GBool constructXRef(FileStream *str);
+  GBool checkEncrypted();
+};
+
+//------------------------------------------------------------------------
+// The global xref table
+//------------------------------------------------------------------------
+
+extern XRef *xref;
+
+#endif