зеркало из https://github.com/mozilla/pjs.git
861 строка
20 KiB
C++
861 строка
20 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code,
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* released March 31, 1998.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*
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* Contributors:
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* Daniel Veditz <dveditz@netscape.com>
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*/
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/*
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* This module implements a simple archive extractor for the PKZIP format.
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*
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* The underlying nsZipArchive is NOT thread-safe. Do not pass references
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* or pointers to it across thread boundaries.
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*/
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#ifndef STANDALONE
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#include "nscore.h"
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#include "prmem.h"
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#include "prio.h"
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#include "plstr.h"
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#include "xp_regexp.h"
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#define ZFILE_CREATE PR_WRONLY | PR_CREATE_FILE
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#define READTYPE PRInt32
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#else
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#include "zipstub.h"
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#undef NETSCAPE // undoes prtypes damage in zlib.h
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#define ZFILE_CREATE "wb"
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#define READTYPE PRUint32
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#endif /* STANDALONE */
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#include "zlib.h"
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#include "zipfile.h"
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#include "zipstruct.h"
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#include "nsZipArchive.h"
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static PRUint16 xtoint(unsigned char *ii);
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static PRUint32 xtolong(unsigned char *ll);
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/*---------------------------------------------
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* C API wrapper for nsZipArchive
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*--------------------------------------------*/
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/**
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* ZIP_OpenArchive
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*
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* opens the named zip/jar archive and returns a handle that
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* represents the archive in other ZIP_ calls.
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*
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* @param zipname archive filename
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* @param hZip receives handle if archive opened OK
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* @return status code
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*/
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PR_PUBLIC_API(PRInt32) ZIP_OpenArchive( const char * zipname, void** hZip )
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{
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PRInt32 status;
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/*--- error check args ---*/
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if ( hZip == 0 )
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return ZIP_ERR_PARAM;
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/*--- NULL output to prevent use by bozos who don't check errors ---*/
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*hZip = 0;
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/*--- create and open the archive ---*/
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nsZipArchive* zip = new nsZipArchive();
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if ( zip == 0 )
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return ZIP_ERR_MEMORY;
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status = zip->OpenArchive(zipname);
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if ( status == ZIP_OK )
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*hZip = NS_STATIC_CAST(void*,zip);
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else
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delete zip;
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return status;
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}
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/**
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* ZIP_CloseArchive
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*
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* closes zip archive and frees memory
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* @param hZip handle obtained from ZIP_OpenArchive
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* @return status code
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*/
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PR_PUBLIC_API(PRInt32) ZIP_CloseArchive( void** hZip )
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{
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/*--- error check args ---*/
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if ( hZip == 0 || *hZip == 0 )
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return ZIP_ERR_PARAM;
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nsZipArchive* zip = NS_STATIC_CAST(nsZipArchive*,*hZip);
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if ( zip->kMagic != ZIP_MAGIC )
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return ZIP_ERR_PARAM; /* whatever it is isn't one of ours! */
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/*--- close the archive ---*/
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*hZip = 0;
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delete zip;
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return ZIP_OK;
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}
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/**
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* ZIP_ExtractFile
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*
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* extracts named file from an opened archive
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*
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* @param hZip handle obtained from ZIP_OpenArchive
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* @param filename name of file in archive
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* @param outname filename to extract to
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*/
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PR_PUBLIC_API(PRInt32) ZIP_ExtractFile( void* hZip, const char * filename, const char * outname )
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{
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/*--- error check args ---*/
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if ( hZip == 0 )
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return ZIP_ERR_PARAM;
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nsZipArchive* zip = NS_STATIC_CAST(nsZipArchive*,hZip);
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if ( zip->kMagic != ZIP_MAGIC )
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return ZIP_ERR_PARAM; /* whatever it is isn't one of ours! */
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/*--- extract the file ---*/
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return zip->ExtractFile( filename, outname );
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}
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/**
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* ZIP_FindInit
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*
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* Initializes an enumeration of files in the archive
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*
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* @param hZip handle obtained from ZIP_OpenArchive
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* @param pattern regexp to match files in archive, the usual shell expressions.
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* NULL pattern also matches all files, faster than "*"
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*/
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PR_PUBLIC_API(void*) ZIP_FindInit( void* hZip, const char * pattern )
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{
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/*--- error check args ---*/
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if ( hZip == 0 )
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return 0;
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nsZipArchive* zip = NS_STATIC_CAST(nsZipArchive*,hZip);
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if ( zip->kMagic != ZIP_MAGIC )
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return 0; /* whatever it is isn't one of ours! */
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/*--- initialize the pattern search ---*/
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return zip->FindInit( pattern );
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}
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/**
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* ZIP_FindInit
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*
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* Puts the next name in the passed buffer. Returns ZIP_ERR_SMALLBUF when
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* the name is too large for the buffer, and ZIP_ERR_FNF when there are no
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* more files that match the pattern
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*
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* @param hFind handle obtained from ZIP_FindInit
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* @param outbuf buffer to receive next filename
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* @param bufsize size of allocated buffer
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*/
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PR_PUBLIC_API(PRInt32) ZIP_FindNext( void* hFind, char * outbuf, PRUint16 bufsize )
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{
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/*--- error check args ---*/
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if ( hFind == 0 )
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return ZIP_ERR_PARAM;
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nsZipFind* find = NS_STATIC_CAST(nsZipFind*,hFind);
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if ( find->kMagic != ZIPFIND_MAGIC )
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return ZIP_ERR_PARAM; /* whatever it is isn't one of ours! */
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/*--- return next filename file ---*/
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return find->mArchive->FindNext( find, outbuf, bufsize );
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}
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/**
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* ZIP_FindFree
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*
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* Releases allocated memory associated with the find token
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*
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* @param hFind handle obtained from ZIP_FindInit
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*/
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PR_PUBLIC_API(PRInt32) ZIP_FindFree( void* hFind )
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{
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/*--- error check args ---*/
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if ( hFind == 0 )
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return ZIP_ERR_PARAM;
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nsZipFind* find = NS_STATIC_CAST(nsZipFind*,hFind);
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if ( find->kMagic != ZIPFIND_MAGIC )
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return ZIP_ERR_PARAM; /* whatever it is isn't one of ours! */
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/* free the find structure */
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return find->mArchive->FindFree( find );
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}
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//***********************************************************
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// nsZipArchive -- public methods
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//***********************************************************
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//---------------------------------------------
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// nsZipArchive::OpenArchive
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//---------------------------------------------
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PRInt32 nsZipArchive::OpenArchive( const char * aArchiveName )
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{
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//-- validate arguments
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if ( aArchiveName == 0 || *aArchiveName == '\0')
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return ZIP_ERR_PARAM;
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//-- not allowed to do two opens on the same object!
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if ( mFd != 0 )
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return ZIP_ERR_GENERAL;
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//-- open the physical file
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mFd = PR_Open( aArchiveName, PR_RDONLY, 0 );
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if ( mFd == 0 )
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return ZIP_ERR_DISK;
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//-- get table of contents for archive
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return BuildFileList();
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}
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//---------------------------------------------
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// nsZipArchive::ExtractFile
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//---------------------------------------------
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PRInt32 nsZipArchive::ExtractFile(const char* aFilename, const char* aOutname)
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{
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//-- sanity check arguments
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if ( aFilename == 0 || aOutname == 0 )
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return ZIP_ERR_PARAM;
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//-- find file information
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const nsZipItem* item = GetFileItem( aFilename );
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if ( item == 0 )
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return ZIP_ERR_FNF;
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//-- extract the file using appropriate method
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switch( item->compression )
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{
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case STORED:
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return CopyItemToDisk( item, aOutname );
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case DEFLATED:
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return InflateItemToDisk( item, aOutname );
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default:
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//-- unsupported compression type
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return ZIP_ERR_UNSUPPORTED;
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}
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}
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//---------------------------------------------
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// nsZipArchive::FindInit
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//---------------------------------------------
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nsZipFind* nsZipArchive::FindInit( const char * aPattern )
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{
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PRBool regExp;
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char* pattern = 0;
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// validate the pattern
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if ( aPattern )
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{
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switch (XP_RegExpValid( (char*)aPattern ))
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{
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case INVALID_SXP:
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return 0;
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case NON_SXP:
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regExp = PR_FALSE;
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break;
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case VALID_SXP:
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regExp = PR_TRUE;
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break;
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default:
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// undocumented return value from RegExpValid!
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PR_ASSERT( PR_FALSE );
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return 0;
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}
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pattern = PL_strdup( aPattern );
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if ( !pattern )
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return 0;
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}
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return new nsZipFind( this, pattern, regExp );
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}
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//---------------------------------------------
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// nsZipArchive::FindNext
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//---------------------------------------------
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PRInt32 nsZipArchive::FindNext( nsZipFind* aFind, char * aBuf, PRUint16 aSize )
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{
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PRInt32 status;
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PRBool found = PR_FALSE;
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PRUint16 slot = aFind->mSlot;
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nsZipItem* item = aFind->mItem;
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if ( aFind->mArchive != this || aBuf == 0 )
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return ZIP_ERR_PARAM;
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// we start from last match, look for next
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while ( slot < ZIP_TABSIZE && !found )
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{
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if ( item != 0 )
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item = item->next; // move to next in current chain
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else
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item = mFiles[slot]; // starting a new slot
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if ( item == 0 )
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{ // no more in this chain, move to next slot
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++slot;
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continue;
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}
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else if ( aFind->mPattern == 0 )
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found = PR_TRUE; // always match
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else if ( aFind->mRegExp )
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found = (XP_RegExpMatch( item->name, aFind->mPattern, PR_FALSE ) == MATCH);
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else
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found = ( PL_strcmp( item->name, aFind->mPattern ) == 0 );
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}
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if ( found )
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{
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if ( aSize > item->namelen )
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{
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PL_strcpy( aBuf, item->name );
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status = ZIP_OK;
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}
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else
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status = ZIP_ERR_SMALLBUF;
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}
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else
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status = ZIP_ERR_FNF;
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// save state for next Find. For 'smallbuf' we give user another chance
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// to find this same match.
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if ( status != ZIP_ERR_SMALLBUF )
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{
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aFind->mSlot = slot;
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aFind->mItem = item;
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}
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return status;
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}
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//---------------------------------------------
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// nsZipArchive::FindFree
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//---------------------------------------------
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PRInt32 nsZipArchive::FindFree( nsZipFind* aFind )
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{
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if ( aFind->mArchive != this )
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return ZIP_ERR_PARAM;
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delete aFind;
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return ZIP_OK;
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}
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//***********************************************************
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// nsZipArchive -- private implementation
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//***********************************************************
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//---------------------------------------------
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// nsZipArchive::BuildFileList
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//---------------------------------------------
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PRInt32 nsZipArchive::BuildFileList()
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{
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PRInt32 status = ZIP_OK;
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PRUint32 sig = 0L;
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PRUint32 namelen, extralen;
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PRUint32 hash;
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ZipLocal Local;
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nsZipItem* item;
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//-----------------------------------------------------------------------
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// read the local file headers.
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//
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// What we *should* be doing is reading the central directory at the end,
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// all in one place. We'll have to change this eventually since the local
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// headers don't have the mode information we need for Unix files.
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//-----------------------------------------------------------------------
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PRInt32 pos = 0L;
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while ( status == ZIP_OK )
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{
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if ( PR_Seek( mFd, pos, PR_SEEK_SET ) != (PRInt32)pos )
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{
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//-- couldn't seek to next position
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status = ZIP_ERR_CORRUPT;
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break;
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}
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if ( PR_Read( mFd, (char*)&Local, sizeof(ZipLocal) ) != sizeof(ZipLocal) )
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{
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//-- file ends prematurely
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status = ZIP_ERR_CORRUPT;
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break;
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}
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//-- make sure we're processing a local header
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sig = xtolong( Local.signature );
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if ( sig == CENTRALSIG )
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{
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// we're onto the next section
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break;
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}
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else if ( sig != LOCALSIG )
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{
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//-- otherwise expected to find a local header
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status = ZIP_ERR_CORRUPT;
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break;
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}
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namelen = xtoint( Local.filename_len );
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extralen = xtoint( Local.extrafield_len );
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item = new nsZipItem();
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if ( item != 0 )
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{
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item->name = new char[namelen+1];
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if ( item->name != 0 )
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{
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if ( PR_Read( mFd, item->name, namelen ) == (READTYPE)namelen )
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{
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item->name[namelen] = 0;
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item->namelen = namelen;
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item->headerloc = pos;
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item->offset = pos + sizeof(ZipLocal) + namelen + extralen;
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item->compression = xtoint( Local.method );
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item->size = xtolong( Local.size );
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item->realsize = xtolong( Local.orglen );
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item->crc32 = xtolong( Local.crc32 );
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//-- add item to file table
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hash = HashName( item->name );
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item->next = mFiles[hash];
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mFiles[hash] = item;
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pos = item->offset + item->size;
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}
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else
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{
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//-- file is truncated
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status = ZIP_ERR_CORRUPT;
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delete item;
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}
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}
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else
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{
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//-- couldn't allocate for the filename
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status = ZIP_ERR_MEMORY;
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delete item;
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}
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}
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else
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{
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//-- couldn't create a nsZipItem
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status = ZIP_ERR_MEMORY;
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}
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} /* while reading local headers */
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//-------------------------------------------------------
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// we don't care about the rest of the file (until we
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// fix this to read the central directory instead)
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//-------------------------------------------------------
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return status;
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}
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//---------------------------------------------
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// nsZipArchive::CopyItemToDisk
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//---------------------------------------------
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PRInt32 nsZipArchive::CopyItemToDisk( const nsZipItem* aItem, const char* aOutname )
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{
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PRInt32 status = ZIP_OK;
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PRUint32 chunk, pos, size;
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PRFileDesc* fOut = 0;
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PR_ASSERT( aItem != 0 && aOutname != 0 );
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char* buf = (char*)PR_Malloc(ZIP_BUFLEN);
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if ( buf == 0 )
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return ZIP_ERR_MEMORY;
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//-- find start of file in archive
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if ( PR_Seek( mFd, aItem->offset, PR_SEEK_SET ) != (PRInt32)aItem->offset )
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{
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status = ZIP_ERR_CORRUPT;
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goto cleanup;
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}
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//-- open output file
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fOut = PR_Open( aOutname, ZFILE_CREATE , 0644);
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if ( fOut == 0 )
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{
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status = ZIP_ERR_DISK;
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goto cleanup;
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}
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//-- copy chunks until file is done
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size = aItem->size;
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for ( pos=0; pos < size; pos += chunk )
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{
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chunk = (pos+ZIP_BUFLEN <= size) ? ZIP_BUFLEN : size - pos;
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if ( PR_Read( mFd, buf, chunk ) != (READTYPE)chunk )
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{
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//-- unexpected end of data in archive
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status = ZIP_ERR_CORRUPT;
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break;
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}
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if ( PR_Write( fOut, buf, chunk ) < (READTYPE)chunk )
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{
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//-- Couldn't write all the data (disk full?)
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status = ZIP_ERR_DISK;
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break;
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}
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}
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cleanup:
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if ( fOut != 0 )
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PR_Close( fOut );
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PR_FREEIF( buf );
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return status;
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}
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//---------------------------------------------
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// nsZipArchive::GetFileItem
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//---------------------------------------------
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const nsZipItem* nsZipArchive::GetFileItem( const char * aFilename )
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{
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PR_ASSERT( aFilename != 0 );
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nsZipItem* item = mFiles[ HashName(aFilename) ];
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for ( ; item != 0; item = item->next )
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{
|
|
if ( 0 == PL_strcmp( aFilename, item->name ) )
|
|
break; //-- found it
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
|
|
|
|
//---------------------------------------------
|
|
// nsZipArchive::HashName
|
|
//---------------------------------------------
|
|
PRUint32 nsZipArchive::HashName( const char* aName )
|
|
{
|
|
PRUint32 val = 0;
|
|
PRUint8* c;
|
|
|
|
PR_ASSERT( aName != 0 );
|
|
|
|
for ( c = (PRUint8*)aName; *c != 0; c++ ) {
|
|
val = val*37 + *c;
|
|
}
|
|
|
|
return (val % ZIP_TABSIZE);
|
|
}
|
|
|
|
|
|
|
|
//---------------------------------------------
|
|
// nsZipArchive::InflateItemToDisk
|
|
//---------------------------------------------
|
|
PRInt32 nsZipArchive::InflateItemToDisk( const nsZipItem* aItem, const char* aOutname )
|
|
{
|
|
PRInt32 status = ZIP_OK;
|
|
PRUint32 chunk, inpos, outpos, size;
|
|
PRFileDesc* fOut = 0;
|
|
z_stream zs;
|
|
int zerr;
|
|
PRBool bInflating = PR_FALSE;
|
|
|
|
PR_ASSERT( aItem != 0 && aOutname != 0 );
|
|
|
|
//-- allocate deflation buffers
|
|
Bytef *inbuf = (Bytef*)PR_Malloc(ZIP_BUFLEN);
|
|
Bytef *outbuf = (Bytef*)PR_Malloc(ZIP_BUFLEN);
|
|
if ( inbuf == 0 || outbuf == 0 )
|
|
{
|
|
status = ZIP_ERR_MEMORY;
|
|
goto cleanup;
|
|
}
|
|
|
|
//-- find start of file in archive
|
|
if ( PR_Seek( mFd, aItem->offset, PR_SEEK_SET ) != (PRInt32)aItem->offset )
|
|
{
|
|
status = ZIP_ERR_CORRUPT;
|
|
goto cleanup;
|
|
}
|
|
|
|
//-- open output file
|
|
fOut = PR_Open( aOutname, ZFILE_CREATE, 0644);
|
|
if ( fOut == 0 )
|
|
{
|
|
status = ZIP_ERR_DISK;
|
|
goto cleanup;
|
|
}
|
|
|
|
//-- set up the inflate
|
|
memset( &zs, 0, sizeof(zs) );
|
|
zerr = inflateInit2( &zs, -MAX_WBITS );
|
|
if ( zerr != Z_OK )
|
|
{
|
|
status = ZIP_ERR_GENERAL;
|
|
goto cleanup;
|
|
}
|
|
bInflating = PR_TRUE;
|
|
|
|
|
|
//-- inflate loop
|
|
size = aItem->size;
|
|
outpos = inpos = 0;
|
|
zs.next_out = outbuf;
|
|
zs.avail_out = ZIP_BUFLEN;
|
|
while ( zerr == Z_OK )
|
|
{
|
|
if ( zs.avail_in == 0 && zs.total_in < size )
|
|
{
|
|
//-- no data to inflate yet still more in file:
|
|
//-- read another chunk of compressed data
|
|
|
|
inpos = zs.total_in; // input position
|
|
chunk = ( inpos + ZIP_BUFLEN <= size ) ? ZIP_BUFLEN : size - inpos;
|
|
|
|
if ( PR_Read( mFd, inbuf, chunk ) != (READTYPE)chunk )
|
|
{
|
|
//-- unexpected end of data
|
|
status = ZIP_ERR_CORRUPT;
|
|
break;
|
|
}
|
|
zs.next_in = inbuf;
|
|
zs.avail_in = ZIP_BUFLEN;
|
|
}
|
|
|
|
if ( zs.avail_out == 0 )
|
|
{
|
|
//-- write inflated buffer to disk and make space
|
|
if ( PR_Write( fOut, outbuf, ZIP_BUFLEN ) < ZIP_BUFLEN )
|
|
{
|
|
//-- Couldn't write all the data (disk full?)
|
|
status = ZIP_ERR_DISK;
|
|
break;
|
|
}
|
|
outpos = zs.total_out;
|
|
|
|
zs.next_out = outbuf;
|
|
zs.avail_out = chunk;
|
|
}
|
|
|
|
zerr = inflate( &zs, Z_PARTIAL_FLUSH );
|
|
|
|
} // while
|
|
|
|
//-- write last inflated bit to disk
|
|
if ( zerr == Z_STREAM_END && outpos < zs.total_out )
|
|
{
|
|
chunk = zs.total_out - outpos;
|
|
if ( PR_Write( fOut, outbuf, chunk ) < (READTYPE)chunk )
|
|
{
|
|
status = ZIP_ERR_DISK;
|
|
}
|
|
}
|
|
|
|
//-- convert zlib error to return value
|
|
if ( status == ZIP_OK && zerr != Z_OK && zerr != Z_STREAM_END )
|
|
{
|
|
status = (zerr == Z_MEM_ERROR) ? ZIP_ERR_MEMORY : ZIP_ERR_CORRUPT;
|
|
}
|
|
|
|
//-- if found no errors make sure we've converted the whole thing
|
|
PR_ASSERT( status != ZIP_OK || zs.total_in == aItem->size );
|
|
PR_ASSERT( status != ZIP_OK || zs.total_out == aItem->realsize );
|
|
|
|
cleanup:
|
|
if ( bInflating )
|
|
{
|
|
//-- free zlib internal state
|
|
inflateEnd( &zs );
|
|
}
|
|
|
|
if ( fOut != 0 )
|
|
PR_Close( fOut );
|
|
|
|
PR_FREEIF( inbuf );
|
|
PR_FREEIF( outbuf );
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
|
|
//------------------------------------------
|
|
// nsZipArchive constructor and destructor
|
|
//------------------------------------------
|
|
|
|
nsZipArchive::nsZipArchive()
|
|
: kMagic(ZIP_MAGIC), mFd(0)
|
|
{
|
|
// initialize the table to NULL
|
|
for ( int i = 0; i < ZIP_TABSIZE; ++i) {
|
|
mFiles[i] = 0;
|
|
}
|
|
}
|
|
|
|
nsZipArchive::~nsZipArchive()
|
|
{
|
|
// close the file if open
|
|
if ( mFd != 0 ) {
|
|
PR_Close(mFd);
|
|
}
|
|
|
|
// delete nsZipItems in table
|
|
nsZipItem* pItem;
|
|
for ( int i = 0; i < ZIP_TABSIZE; ++i)
|
|
{
|
|
pItem = mFiles[i];
|
|
while ( pItem != 0 )
|
|
{
|
|
mFiles[i] = pItem->next;
|
|
delete pItem;
|
|
pItem = mFiles[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
//------------------------------------------
|
|
// nsZipItem constructor and destructor
|
|
//------------------------------------------
|
|
|
|
nsZipItem::nsZipItem() : name(0),next(0) {}
|
|
|
|
nsZipItem::~nsZipItem()
|
|
{
|
|
if (name != 0 )
|
|
delete [] name;
|
|
}
|
|
|
|
|
|
|
|
|
|
//------------------------------------------
|
|
// nsZipFind constructor and destructor
|
|
//------------------------------------------
|
|
|
|
nsZipFind::nsZipFind( nsZipArchive* aZip, char* aPattern, PRBool aRegExp )
|
|
: kMagic(ZIPFIND_MAGIC),
|
|
mArchive(aZip),
|
|
mPattern(aPattern),
|
|
mSlot(0),
|
|
mItem(0),
|
|
mRegExp(aRegExp)
|
|
{}
|
|
|
|
nsZipFind::~nsZipFind()
|
|
{
|
|
if (mPattern != 0 )
|
|
PL_strfree( mPattern );
|
|
}
|
|
|
|
|
|
|
|
|
|
//------------------------------------------
|
|
// helper functions
|
|
//------------------------------------------
|
|
|
|
/*
|
|
* x t o i n t
|
|
*
|
|
* Converts a two byte ugly endianed integer
|
|
* to our platform's integer.
|
|
*/
|
|
static PRUint16 xtoint (unsigned char *ii)
|
|
{
|
|
return (PRUint16) ((ii [0]) | (ii [1] << 8));
|
|
}
|
|
|
|
/*
|
|
* x t o l o n g
|
|
*
|
|
* Converts a four byte ugly endianed integer
|
|
* to our platform's integer.
|
|
*/
|
|
static PRUint32 xtolong (unsigned char *ll)
|
|
{
|
|
PRUint32 ret;
|
|
|
|
ret = (
|
|
(((PRUint32) ll [0]) << 0) |
|
|
(((PRUint32) ll [1]) << 8) |
|
|
(((PRUint32) ll [2]) << 16) |
|
|
(((PRUint32) ll [3]) << 24)
|
|
);
|
|
|
|
return ret;
|
|
}
|