DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Untracked file

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Don Bragg <dbragg@netscape.com>
 *   Samir Gehani <sgehani@netscape.com>
 *   Mitch Stoltz <mstoltz@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */


#ifndef nsJAR_h__
#define nsJAR_h__

#include "nscore.h"
#include "pratom.h"
#include "prmem.h"
#include "prio.h"
#include "plstr.h"
#include "prlog.h"
#include "prtypes.h"
#include "prinrval.h"

#include "nsIComponentManager.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsIFile.h"
#include "nsIEnumerator.h"
#include "nsVoidArray.h"
#include "nsHashtable.h"
#include "nsAutoLock.h"
#include "nsIZipReader.h"
#include "nsIJAR.h"
#include "nsZipArchive.h"
#include "zipfile.h"
#include "nsIPrincipal.h"
#include "nsISignatureVerifier.h"
#include "nsIObserverService.h"
#include "nsWeakReference.h"
#include "nsIObserver.h"

class nsIInputStream;
class nsJARManifestItem;
class nsZipReaderCache;

/*-------------------------------------------------------------------------
 * Class nsJAR declaration. 
 * nsJAR serves as an XPCOM wrapper for nsZipArchive with the addition of 
 * JAR manifest file parsing. 
 *------------------------------------------------------------------------*/
class nsJAR : public nsIZipReader, public nsIJAR
{
  // Allows nsJARInputStream to call the verification functions
  friend class nsJARInputStream;

  public:

    nsJAR();
    virtual ~nsJAR();
    
    NS_DEFINE_STATIC_CID_ACCESSOR( NS_ZIPREADER_CID );
  
    NS_DECL_ISUPPORTS

    NS_DECL_NSIZIPREADER

    NS_DECL_NSIJAR

    PRIntervalTime GetReleaseTime() {
        return mReleaseTime;
    }
    
    PRBool IsReleased() {
        return mReleaseTime != PR_INTERVAL_NO_TIMEOUT;
    }

    void SetReleaseTime() {
      mReleaseTime = PR_IntervalNow();
    }
    
    void ClearReleaseTime() {
      mReleaseTime = PR_INTERVAL_NO_TIMEOUT;
    }
    
    void SetZipReaderCache(nsZipReaderCache* cache) {
      mCache = cache;
    }

    PRFileDesc* OpenFile();
  protected:
    //-- Private data members
    nsCOMPtr<nsIFile>        mZipFile;        // The zip/jar file on disk
    nsZipArchive             mZip;            // The underlying zip archive
    nsObjectHashtable        mManifestData;   // Stores metadata for each entry
    PRBool                   mParsedManifest; // True if manifest has been parsed
    nsCOMPtr<nsIPrincipal>   mPrincipal;      // The entity which signed this file
    PRInt16                  mGlobalStatus;   // Global signature verification status
    PRIntervalTime           mReleaseTime;    // used by nsZipReaderCache for flushing entries
    nsZipReaderCache*        mCache;          // if cached, this points to the cache it's contained in
	PRLock*					 mLock;	
    PRInt32                  mTotalItemsInManifest;
    PRFileDesc*              mFd;
    
    //-- Private functions
    nsresult ParseManifest(nsISignatureVerifier* verifier);
    void     ReportError(const char* aFilename, PRInt16 errorCode);
    nsresult LoadEntry(const char* aFilename, char** aBuf, 
                       PRUint32* aBufLen = nsnull);
    PRInt32  ReadLine(const char** src); 
    nsresult ParseOneFile(nsISignatureVerifier* verifier,
                          const char* filebuf, PRInt16 aFileType);
    nsresult VerifyEntry(nsISignatureVerifier* verifier,
                         nsJARManifestItem* aEntry, const char* aEntryData, 
                         PRUint32 aLen);

    nsresult CalculateDigest(const char* aInBuf, PRUint32 aInBufLen,
                             char** digest);

    //-- Debugging
    void DumpMetadata(const char* aMessage);
};

/**
 * nsJARItem
 *
 * An individual JAR entry. A set of nsJARItems macthing a
 * supplied pattern are returned in a nsJAREnumerator.
 */
class nsJARItem : public nsIZipEntry
{
public:
    NS_DECL_ISUPPORTS
    NS_DECL_NSIZIPENTRY
    
    void Init(nsZipItem* aZipItem);

    nsJARItem();
    virtual ~nsJARItem();

    private:
    nsZipItem* mZipItem;
};

/**
 * nsJAREnumerator
 *
 * Enumerates a list of files in a zip archive 
 * (based on a pattern match in its member nsZipFind).
 */
class nsJAREnumerator : public nsISimpleEnumerator
{
public:
    NS_DECL_ISUPPORTS
    NS_DECL_NSISIMPLEENUMERATOR

    nsJAREnumerator(nsZipFind *aFind);
    virtual ~nsJAREnumerator();

protected:
    nsZipArchive *mArchive; // pointer extracted from mFind for efficiency
    nsZipFind    *mFind;
    nsZipItem    *mCurr;    // raw pointer to an nsZipItem owned by mArchive -- DON'T delete
    PRBool        mIsCurrStale;
};

////////////////////////////////////////////////////////////////////////////////

#if defined(DEBUG_warren) || defined(DEBUG_jband)
#define ZIP_CACHE_HIT_RATE
#endif

class nsZipReaderCache : public nsIZipReaderCache, public nsIObserver,
                         public nsSupportsWeakReference
{
public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIZIPREADERCACHE
  NS_DECL_NSIOBSERVER

  nsZipReaderCache();
  virtual ~nsZipReaderCache();

  nsresult ReleaseZip(nsJAR* reader);

protected:
  PRLock*               mLock;
  PRInt32               mCacheSize;
  nsSupportsHashtable   mZips;

#ifdef ZIP_CACHE_HIT_RATE
  PRUint32              mZipCacheLookups;
  PRUint32              mZipCacheHits;
  PRUint32              mZipCacheFlushes;
  PRUint32              mZipSyncMisses;
#endif

};

////////////////////////////////////////////////////////////////////////////////

#endif /* nsJAR_h__ */