1 files changed, 111 insertions, 0 deletions
diff --git a/noncore/unsupported/qpdf/xpdf/XRef.h b/noncore/unsupported/qpdf/xpdf/XRef.h
new file mode 100644
index 0000000..a44c495
--- a/dev/null
+++ b/noncore/unsupported/qpdf/xpdf/XRef.h
@@ -0,0 +1,111 @@
+//========================================================================
+//
+// XRef.h
+//
+// Copyright 1996 Derek B. Noonburg
+//
+//========================================================================
+
+#ifndef XREF_H
+#define XREF_H
+
+#ifdef __GNUC__
+#pragma interface
+#endif
+
+#include "gtypes.h"
+#include "Object.h"
+
+class Dict;
+class Stream;
+
+//------------------------------------------------------------------------
+// XRef
+//------------------------------------------------------------------------
+
+struct XRefEntry {
+  int offset;
+  int gen;
+  GBool used;
+};
+
+class XRef {
+public:
+
+  // Constructor.  Read xref table from stream.
+  XRef(BaseStream *strA, GString *ownerPassword, GString *userPassword);
+
+  // Destructor.
+  ~XRef();
+
+  // Is xref table valid?
+  GBool isOk() { return ok; }
+
+  // Is the file encrypted?
+#ifndef NO_DECRYPTION
+  GBool isEncrypted() { return encrypted; }
+#else
+  GBool isEncrypted() { return gFalse; }
+#endif
+
+  // Check various permissions.
+  GBool okToPrint(GBool ignoreOwnerPW = gFalse);
+  GBool okToChange(GBool ignoreOwnerPW = gFalse);
+  GBool okToCopy(GBool ignoreOwnerPW = gFalse);
+  GBool okToAddNotes(GBool ignoreOwnerPW = gFalse);
+
+  // 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);
+  Object *getDocInfoNF(Object *obj);
+
+  // Return the number of objects in the xref table.
+  int getNumObjects() { return size; }
+
+  // Return the offset of the last xref table.
+  int getLastXRefPos() { return lastXRefPos; }
+
+  // Return the catalog object reference.
+  int getRootNum() { return rootNum; }
+  int getRootGen() { return rootGen; }
+
+  // Get end position for a stream in a damaged file.
+  // Returns -1 if unknown or file is not damaged.
+  int getStreamEnd(int streamStart);
+
+private:
+
+  BaseStream *str;		// input stream
+  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 lastXRefPos;		// offset of last xref table
+  int *streamEnds;		// 'endstream' positions - only used in
+				//   damaged files
+  int streamEndsLen;		// number of valid entries in streamEnds
+#ifndef NO_DECRYPTION
+  GBool encrypted;		// true if file is encrypted
+  int encVersion;		// encryption algorithm
+  int encRevision;		// security handler revision
+  int keyLength;		// length of key, in bytes
+  int permFlags;		// permission bits
+  Guchar fileKey[16];		// file decryption key
+  GBool ownerPasswordOk;	// true if owner password is correct
+#endif
+
+  int readTrailer();
+  GBool readXRef(int *pos);
+  GBool constructXRef();
+  GBool checkEncrypted(GString *ownerPassword, GString *userPassword);
+};
+
+#endif