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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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diff --git a/netwerk/streamconv/converters/nsBinHexDecoder.h b/netwerk/streamconv/converters/nsBinHexDecoder.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+// A decoder for Mac Bin Hex 4.0.
+
+// This decoder is currently only intended to be used on NON-Mac platforms. It isn't hooked up to
+// code which would actually save the file to disk. As a result, we can't leverage the resource fork.
+// This makes this decoder most unhelpful for the Mac. Our assumption is that if you save a bin hex file
+// on the mac and try to open it, stuffit or some other tool is already going to be on the Mac which knows how
+// to handle bin hex. On windows and unix, that's not the case. We need client code to strip out the data fork.
+// So this decoder currently just strips out the data fork.
+
+// Note: it's possible that we can eventually turn this decoder into both a decoder and into a file stream (much
+// like the apple double decoder) so on the Mac, if we are saving to disk, we can invoke the decoder as a file stream
+// and it will process the resource fork and do the right magic.
+
+#ifndef nsBinHexDecoder_h__
+#define nsBinHexDecoder_h__
+
+#include "nsIStreamConverter.h"
+#include "nsIChannel.h"
+#include "nsIOutputStream.h"
+#include "nsIInputStream.h"
+
+#include "nsCOMPtr.h"
+#include "nsString.h"
+
+#define NS_BINHEXDECODER_CID \
+{ /* 301DEA42-6850-4cda-8945-81F7DBC2186B */ \
+ 0x301dea42, 0x6850, 0x4cda, \
+ { 0x89, 0x45, 0x81, 0xf7, 0xdb, 0xc2, 0x18, 0x6b } \
+}
+
+namespace mozilla {
+namespace net {
+
+typedef struct _binhex_header
+{
+ uint32_t type, creator;
+ uint16_t flags;
+ int32_t dlen, rlen;
+} binhex_header;
+
+typedef union
+{
+ unsigned char c[4];
+ uint32_t val;
+} longbuf;
+
+#define BINHEX_STATE_START 0
+#define BINHEX_STATE_FNAME 1
+#define BINHEX_STATE_HEADER 2
+#define BINHEX_STATE_HCRC 3
+#define BINHEX_STATE_DFORK 4
+#define BINHEX_STATE_DCRC 5
+#define BINHEX_STATE_RFORK 6
+#define BINHEX_STATE_RCRC 7
+#define BINHEX_STATE_FINISH 8
+#define BINHEX_STATE_DONE 9
+/* #define BINHEX_STATE_ERROR 10 */
+
+class nsBinHexDecoder : public nsIStreamConverter
+{
+public:
+ // nsISupports methods
+ NS_DECL_ISUPPORTS
+
+ // nsIStreamConverter methods
+ NS_DECL_NSISTREAMCONVERTER
+
+ // nsIStreamListener methods
+ NS_DECL_NSISTREAMLISTENER
+
+ // nsIRequestObserver methods
+ NS_DECL_NSIREQUESTOBSERVER
+
+ nsBinHexDecoder();
+
+protected:
+ virtual ~nsBinHexDecoder();
+
+ int16_t GetNextChar(uint32_t numBytesInBuffer);
+ nsresult ProcessNextChunk(nsIRequest * aRequest, nsISupports * aContext, uint32_t numBytesInBuffer);
+ nsresult ProcessNextState(nsIRequest * aRequest, nsISupports * aContext);
+ nsresult DetectContentType(nsIRequest * aRequest, const nsAFlatCString &aFilename);
+
+protected:
+ nsCOMPtr<nsIStreamListener> mNextListener;
+
+ // the input and output streams form a pipe...they need to be passed around together..
+ nsCOMPtr<nsIOutputStream> mOutputStream; // output stream
+ nsCOMPtr<nsIInputStream> mInputStream;
+
+ int16_t mState; /* current state */
+ uint16_t mCRC; /* cumulative CRC */
+ uint16_t mFileCRC; /* CRC value from file */
+ longbuf mOctetBuf; /* buffer for decoded 6-bit values */
+ int16_t mOctetin; /* current input position in octetbuf */
+ int16_t mDonePos; /* ending position in octetbuf */
+ int16_t mInCRC; /* flag set when reading a CRC */
+
+ // Bin Hex Header Information
+ binhex_header mHeader;
+ nsCString mName; /* fsspec for the output file */
+
+ // unfortunately we are going to need 2 8K buffers here. One for the data we are currently digesting. Another
+ // for the outgoing decoded data. I tried getting them to share a buffer but things didn't work out so nicely.
+ char * mDataBuffer; // temporary holding pen for the incoming data.
+ char * mOutgoingBuffer; // temporary holding pen for the incoming data.
+ uint32_t mPosInDataBuffer;
+
+ unsigned char mRlebuf; /* buffer for last run length encoding value */
+
+ uint32_t mCount; /* generic counter */
+ int16_t mMarker; /* flag indicating maker */
+
+ int32_t mPosInbuff; /* the index of the inbuff. */
+ int32_t mPosOutputBuff; /* the position of the out buff. */
+};
+
+} // namespace net
+} // namespace mozilla
+
+#endif /* nsBinHexDecoder_h__ */