1 : /* ***** BEGIN LICENSE BLOCK *****
2 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
3 : *
4 : * The contents of this file are subject to the Mozilla Public License Version
5 : * 1.1 (the "License"); you may not use this file except in compliance with
6 : * the License. You may obtain a copy of the License at
7 : * http://www.mozilla.org/MPL/
8 : *
9 : * Software distributed under the License is distributed on an "AS IS" basis,
10 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11 : * for the specific language governing rights and limitations under the
12 : * License.
13 : *
14 : * The Original Code is Zip Writer Component.
15 : *
16 : * The Initial Developer of the Original Code is
17 : * Dave Townsend <dtownsend@oxymoronical.com>.
18 : *
19 : * Portions created by the Initial Developer are Copyright (C) 2007
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Lan Qiang <jameslan@gmail.com>
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either the GNU General Public License Version 2 or later (the "GPL"), or
27 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK *****
38 : */
39 :
40 : #ifndef _nsDeflateConverter_h_
41 : #define _nsDeflateConverter_h_
42 :
43 : #include "nsIStreamConverter.h"
44 : #include "nsCOMPtr.h"
45 : #include "nsIPipe.h"
46 : #include "zlib.h"
47 :
48 : #define DEFLATECONVERTER_CLASSNAME "Deflate converter"
49 : #define DEFLATECONVERTER_CID { 0x461cd5dd, 0x73c6, 0x47a4, \
50 : { 0x8c, 0xc3, 0x60, 0x3b, 0x37, 0xd8, 0x4a, 0x61 } }
51 :
52 : #define ZIP_BUFLEN (4 * 1024 - 1)
53 :
54 : class nsDeflateConverter : public nsIStreamConverter
55 : {
56 : public:
57 : NS_DECL_ISUPPORTS
58 : NS_DECL_NSIREQUESTOBSERVER
59 : NS_DECL_NSISTREAMLISTENER
60 : NS_DECL_NSISTREAMCONVERTER
61 :
62 6 : nsDeflateConverter()
63 6 : {
64 : // 6 is Z_DEFAULT_COMPRESSION but we need the actual value
65 6 : mLevel = 6;
66 6 : }
67 :
68 5146 : nsDeflateConverter(PRInt32 level)
69 5146 : {
70 5146 : mLevel = level;
71 5146 : }
72 :
73 : private:
74 :
75 5152 : ~nsDeflateConverter()
76 5152 : {
77 5152 : }
78 :
79 : enum WrapMode {
80 : WRAP_ZLIB,
81 : WRAP_GZIP,
82 : WRAP_NONE
83 : };
84 :
85 : WrapMode mWrapMode;
86 : PRUint32 mOffset;
87 : PRInt32 mLevel;
88 : nsCOMPtr<nsIStreamListener> mListener;
89 : nsCOMPtr<nsISupports> mContext;
90 : z_stream mZstream;
91 : unsigned char mWriteBuffer[ZIP_BUFLEN];
92 :
93 : nsresult Init();
94 : nsresult PushAvailableData(nsIRequest *aRequest, nsISupports *aContext);
95 : };
96 :
97 : #endif
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