import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

modules/libjar/nsJARInputStream.h

@@ -0,0 +1,73 @@
+/* nsJARInputStream.h
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsJARINPUTSTREAM_h__
+#define nsJARINPUTSTREAM_h__
+
+#include "nsIInputStream.h"
+#include "nsJAR.h"
+#include "nsTArray.h"
+#include "mozilla/Attributes.h"
+
+/*-------------------------------------------------------------------------
+ * Class nsJARInputStream declaration. This class defines the type of the
+ * object returned by calls to nsJAR::GetInputStream(filename) for the
+ * purpose of reading a file item out of a JAR file. 
+ *------------------------------------------------------------------------*/
+class nsJARInputStream final : public nsIInputStream
+{
+  public:
+    nsJARInputStream() : 
+        mOutSize(0), mInCrc(0), mOutCrc(0), mNameLen(0),
+        mCurPos(0), mArrPos(0), mMode(MODE_NOTINITED)
+    { 
+      memset(&mZs, 0, sizeof(z_stream));
+    }
+
+    NS_DECL_THREADSAFE_ISUPPORTS
+    NS_DECL_NSIINPUTSTREAM
+   
+    // takes ownership of |fd|, even on failure
+    nsresult InitFile(nsJAR *aJar, nsZipItem *item);
+
+    nsresult InitDirectory(nsJAR *aJar,
+                           const nsACString& aJarDirSpec,
+                           const char* aDir);
+  
+  private:
+    ~nsJARInputStream() { Close(); }
+
+    RefPtr<nsZipHandle>  mFd;         // handle for reading
+    uint32_t               mOutSize;    // inflated size 
+    uint32_t               mInCrc;      // CRC as provided by the zipentry
+    uint32_t               mOutCrc;     // CRC as calculated by me
+    z_stream               mZs;         // zip data structure
+
+    /* For directory reading */
+    RefPtr<nsJAR>          mJar;        // string reference to zipreader
+    uint32_t               mNameLen;    // length of dirname
+    nsCString              mBuffer;     // storage for generated text of stream
+    uint32_t               mCurPos;     // Current position in buffer
+    uint32_t               mArrPos;     // current position within mArray
+    nsTArray<nsCString>    mArray;      // array of names in (zip) directory
+
+	typedef enum {
+        MODE_NOTINITED,
+        MODE_CLOSED,
+        MODE_DIRECTORY,
+        MODE_INFLATE,
+        MODE_COPY
+    } JISMode;
+
+    JISMode                mMode;		// Modus of the stream
+
+    nsresult ContinueInflate(char* aBuf, uint32_t aCount, uint32_t* aBytesRead);
+    nsresult ReadDirectory(char* aBuf, uint32_t aCount, uint32_t* aBytesRead);
+    uint32_t CopyDataToBuffer(char* &aBuffer, uint32_t &aCount);
+};
+
+#endif /* nsJARINPUTSTREAM_h__ */
+