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