[51696] | 1 | /* $Id: pkzipvfs.cpp 100908 2023-08-19 02:57:05Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - PKZIP Virtual Filesystem.
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| 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2014-2023 Oracle and/or its affiliates.
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[51696] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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[51696] | 11 | *
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[96407] | 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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[51696] | 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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[96407] | 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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[51696] | 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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[96407] | 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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[51696] | 35 | */
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| 36 |
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| 37 |
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[57372] | 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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[51696] | 41 | #include <iprt/zip.h>
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| 42 | #include <iprt/assert.h>
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| 43 | #include <iprt/err.h>
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| 44 | #include <iprt/file.h>
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| 45 | #include <iprt/mem.h>
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| 46 | #include <iprt/poll.h>
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| 47 | #include <iprt/string.h>
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| 48 | #include <iprt/vfs.h>
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| 49 | #include <iprt/vfslowlevel.h>
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| 50 | #include <iprt/stream.h>
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| 51 |
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| 52 |
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[57358] | 53 | /*********************************************************************************************************************************
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| 54 | * Structures and Typedefs *
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| 55 | *********************************************************************************************************************************/
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[51696] | 56 | /* See http://www.pkware.com/documents/casestudies/APPNOTE.TXT */
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| 57 |
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| 58 | /**
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| 59 | * PKZip Local File Header.
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| 60 | */
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| 61 | #pragma pack(1)
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| 62 | typedef struct RTZIPPKZIPLOCALFILEHDR
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| 63 | {
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| 64 | /** Magic value, see RTZIPPKZIPLOCALFILEHDR_MAGIC. */
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| 65 | uint32_t u32Magic;
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| 66 | /** Minimum version needed to extract. */
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| 67 | uint16_t u16Version;
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| 68 | /** General purpose bit flag. */
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| 69 | uint16_t fFlags;
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| 70 | /** Compression method. See RTZIPPKZIP_COMP_METHOD_XXX. */
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| 71 | uint16_t u16ComprMethod;
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| 72 | /** Last modified time, MS-DOS format: HHHHHMMM MMMSSSSS, multiply seconds by 2 */
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| 73 | uint16_t u16LastModifiedTime;
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| 74 | /** Last modified date, MS-DOS format: YYYYYYYM MMMDDDDD, year starts at 1980 */
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| 75 | uint16_t u16LastModifiedDate;
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| 76 | /** Checksum. */
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| 77 | uint32_t u32Crc;
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| 78 | /** Compressed size. */
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| 79 | uint32_t cbCompressed;
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| 80 | /** Uncompressed size. */
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| 81 | uint32_t cbUncompressed;
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| 82 | /** Length of the file name. */
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| 83 | uint16_t cbFilename;
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| 84 | /** Length of the extra field. */
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| 85 | uint16_t cbExtra;
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| 86 | /** Start of the file name. */
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| 87 | uint8_t u8Filename;
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| 88 | } RTZIPPKZIPLOCALFILEHDR;
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| 89 | #pragma pack()
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| 90 | AssertCompileSize(RTZIPPKZIPLOCALFILEHDR, 30+1);
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| 91 | /** Pointer to PKZip Local File Header. */
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| 92 | typedef RTZIPPKZIPLOCALFILEHDR *PRTZIPPKZIPLOCALFILEHDR;
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| 93 |
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| 94 | #define RTZIPPKZIPLOCALFILEHDR_MAGIC RT_MAKE_U32_FROM_U8('P','K','\003','\004')
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| 95 |
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| 96 | /**
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| 97 | * PKZip compression method.
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| 98 | */
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| 99 | typedef enum RTZIPPKZIP_COMP_METHOD
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| 100 | {
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| 101 | /** No compression */
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| 102 | RTZIPPKZIP_COMP_METHOD_STORED = 0,
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| 103 | /** Shrunk */
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| 104 | RTZIPPKZIP_COMP_METHOD_SHRUNK = 1,
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| 105 | /** Reduced with compression factor 1 */
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| 106 | RTZIPPKZIP_COMP_METHOD_REDUCED1 = 2,
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| 107 | /** Reduced with compression factor 2 */
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| 108 | RTZIPPKZIP_COMP_METHOD_REDUCED2 = 3,
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| 109 | /** Reduced with compression factor 3 */
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| 110 | RTZIPPKZIP_COMP_METHOD_REDUCED3 = 4,
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| 111 | /** Reduced with compression factor 4 */
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| 112 | RTZIPPKZIP_COMP_METHOD_REDUCED4 = 5,
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| 113 | /** Imploded */
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| 114 | RTZIPPKZIP_COMP_METHOD_IMPLODED = 6,
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| 115 | /** Deflated */
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| 116 | RTZIPPKZIP_COMP_METHOD_DEFLATED = 8,
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| 117 | /** Deflated64 */
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| 118 | RTZIPPKZIP_COMP_METHOD_DEFLATED64 = 9,
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| 119 | /* Compressed using bzip2 */
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| 120 | RTZIPPKZIP_COMP_METHOD_BZIP2 = 12,
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| 121 | /** Compressed using LZMA */
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| 122 | RTZIPPKZIP_COMP_METHOD_LZMA = 14
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| 123 | } RTZIPPKZIP_COMP_METHOD;
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| 124 |
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| 125 | /**
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| 126 | * PKZip Central Directory Header.
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| 127 | */
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| 128 | #pragma pack(1)
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| 129 | typedef struct RTZIPPKZIPCENTRDIRHDR
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| 130 | {
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| 131 | /** The magic value. See RTZIPPKZIPCENTRDIRHDR_MAGIC. */
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| 132 | uint32_t u32Magic;
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| 133 | /** The version used for creating the item. */
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| 134 | uint16_t u16VerMade;
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| 135 | /** The minimum version required for extracting the item. */
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| 136 | uint16_t u16VerRequired;
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| 137 | /** General purpose flags. */
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| 138 | uint16_t fFlags;
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| 139 | /** Compresstion method. See RTZIPPKZIP_COMP_METHOD_XXX */
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| 140 | uint16_t u16ComprMethod;
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| 141 | /** Last modified time, MS-DOS format: HHHHHMMM MMMSSSSS, multiply seconds by 2 */
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| 142 | uint16_t u16LastModifiedTime;
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| 143 | /** Last modified date, MS-DOS format: YYYYYYYM MMMDDDDD, year starts at 1980 */
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| 144 | uint16_t u16LastModifiedDate;
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| 145 | /** Checksum. */
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| 146 | uint32_t u32Crc;
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| 147 | /** Compressed size. */
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| 148 | uint32_t cbCompressed;
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| 149 | /** Uncompressed size. */
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| 150 | uint32_t cbUncompressed;
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| 151 | /** Length of the object file name. */
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| 152 | uint16_t cbFilename;
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| 153 | /** Length of the extra field. */
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| 154 | uint16_t cbExtra;
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| 155 | /** Length of the object comment. */
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| 156 | uint16_t cbComment;
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| 157 | /** The number of the disk on which this file begins. */
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| 158 | uint16_t iDiskStart;
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| 159 | /** Internal attributes. */
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| 160 | uint16_t u16IntAttrib;
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| 161 | /** External attributes. */
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| 162 | uint32_t u32ExtAttrib;
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| 163 | /** Offset from the start of the first disk on which this file appears to
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| 164 | * where the local file header should be found. */
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| 165 | uint32_t offLocalFileHeader;
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| 166 | /** Start of the file name. */
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| 167 | uint8_t u8Filename;
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| 168 | } RTZIPPKZIPCENTRDIRHDR;
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| 169 | #pragma pack()
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| 170 | AssertCompileSize(RTZIPPKZIPCENTRDIRHDR, 46+1);
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| 171 | /** Pointer to the PKZip Central Directory Header. */
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| 172 | typedef RTZIPPKZIPCENTRDIRHDR *PRTZIPPKZIPCENTRDIRHDR;
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| 173 |
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| 174 | #define RTZIPPKZIPCENTRDIRHDR_MAGIC RT_MAKE_U32_FROM_U8('P','K','\001','\002')
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| 175 |
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| 176 | /**
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| 177 | * PKZip End of Central Directory Record.
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| 178 | */
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| 179 | #pragma pack(1)
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| 180 | typedef struct RTZIPPKZIPENDOFCENTRDIRREC
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| 181 | {
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| 182 | /** The magic value. See RTZIPPKZIPENDOFCENTRDIRREC_MAGIC. */
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| 183 | uint32_t u32Magic;
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| 184 | /** Number of this disk. */
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| 185 | uint16_t iThisDisk;
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| 186 | /** Number of the disk with the start of the Central Directory. */
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| 187 | uint16_t iDiskStartCentrDirectory;
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| 188 | /** Number of Central Directory entries on this disk. */
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| 189 | uint16_t cCentrDirRecordsThisDisk;
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| 190 | /** Number of Central Directory records. */
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| 191 | uint16_t cCentrDirRecords;
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| 192 | /** Size of the Central Directory in bytes. */
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| 193 | uint32_t cbCentrDir;
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| 194 | /** Offset of the Central Directory. */
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| 195 | uint32_t offCentrDir;
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| 196 | /** Size of the comment in bytes. */
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| 197 | uint16_t cbComment;
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| 198 | /** Start of the comment. */
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| 199 | uint8_t u8Comment;
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| 200 | } RTZIPPKZIPENDOFCENTRDIRREC;
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| 201 | #pragma pack()
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| 202 | AssertCompileSize(RTZIPPKZIPENDOFCENTRDIRREC, 22+1);
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| 203 | /** Pointer to the PKZip End of Central Directory Record. */
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| 204 | typedef RTZIPPKZIPENDOFCENTRDIRREC const *PCRTZIPPKZIPENDOFCENTRDIRREC;
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| 205 |
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| 206 | #define RTZIPPKZIPENDOFCENTRDIRREC_MAGIC RT_MAKE_U32_FROM_U8('P','K','\005','\006')
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| 207 |
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| 208 | /**
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| 209 | * PKZip ZIP64 End of Central Directory Record.
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| 210 | */
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| 211 | #pragma pack(1)
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| 212 | typedef struct RTZIPPKZIP64ENDOFCENTRDIRREC
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| 213 | {
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| 214 | /** The magic value. See RTZIPPKZIP64ENDOFCENTRDIRREC_MAGIC. */
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| 215 | uint32_t u32Magic;
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| 216 | /** Size of Zip64 end of Central Directory Record. */
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| 217 | uint64_t cbSizeEocdr;
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| 218 | /** The version used for creating the item. */
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| 219 | uint16_t u16VerMade;
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| 220 | /** The minimum version required for extracting the item. */
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| 221 | uint16_t u16VerRequired;
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| 222 | /** Number of this disk. */
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| 223 | uint32_t iThisDisk;
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| 224 | /** Number of the disk with the start of the Central Directory. */
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| 225 | uint32_t iDiskStartCentrDirectory;
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| 226 | /** Number of Central Directory entries on this disk. */
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| 227 | uint64_t cCentrDirRecordsThisDisk;
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| 228 | /** Number of Central Directory records. */
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| 229 | uint64_t cCentrDirRecords;
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| 230 | /** Size of the Central Directory in bytes. */
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| 231 | uint64_t cbCentrDir;
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| 232 | /** Offset of the Central Directory. */
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| 233 | uint64_t offCentrDir;
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| 234 | } RTZIPPKZIP64ENDOFCENTRDIRREC;
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| 235 | #pragma pack()
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| 236 | AssertCompileSize(RTZIPPKZIP64ENDOFCENTRDIRREC, 56);
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| 237 | /** Pointer to the 64-bit PKZip End of Central Directory Record. */
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| 238 | typedef RTZIPPKZIP64ENDOFCENTRDIRREC *PRTZIPPKZIP64ENDOFCENTRDIRREC;
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| 239 |
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| 240 | #define RTZIPPKZIP64ENDOFCENTRDIRREC_MAGIC RT_MAKE_U32_FROM_U8('P','K','\006','\006')
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| 241 |
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| 242 | /**
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| 243 | * PKZip ZIP64 End of Central Directory Locator.
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| 244 | */
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| 245 | #pragma pack(1)
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| 246 | typedef struct RTZIPPKZIP64ENDOFCENTRDIRLOC
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| 247 | {
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| 248 | /** The magic value. See RTZIPPKZIP64ENDOFCENTRDIRLOC_MAGIC. */
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| 249 | uint32_t u32Magic;
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| 250 | /** Number of the disk with the start of the ZIP64 End of Central Directory. */
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| 251 | uint32_t iDiskStartCentrDir;
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| 252 | /** Relative offset of the ZIP64 End of Central Directory Record. */
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| 253 | uint64_t offEndOfCentrDirRec;
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| 254 | /** Total number of disks. */
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| 255 | uint32_t cDisks;
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| 256 | } RTZIPPKZIP64ENDOFCENTRDIRLOC;
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| 257 | #pragma pack()
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| 258 | AssertCompileSize(RTZIPPKZIP64ENDOFCENTRDIRLOC, 20);
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| 259 |
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| 260 | #define RTZIPPKZIP64ENDOFCENTRDIRLOC_MAGIC RT_MAKE_U32_FROM_U8('P','K','\006','\007')
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| 261 |
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| 262 | /**
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| 263 | * PKZip ZIP64 Extended Information Extra Field.
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| 264 | */
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| 265 | #pragma pack(1)
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| 266 | typedef struct RTZIPPKZIP64EXTRAFIELD
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| 267 | {
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| 268 | /** Uncompressed size. */
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| 269 | uint64_t cbUncompressed;
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| 270 | /** Compressed size. */
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| 271 | uint64_t cbCompressed;
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| 272 | /** Offset from the start of the first disk on which this file appears to
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| 273 | * where the local file header should be found. */
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| 274 | uint64_t offLocalFileHeader;
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| 275 | /** The number of the disk on which this file begins. */
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| 276 | uint32_t iDiskStart;
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| 277 | } RTZIPPKZIP64EXTRAFIELD;
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| 278 | #pragma pack()
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| 279 | /** Pointer to the ZIP64 Extended Information Extra Field. */
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| 280 | typedef RTZIPPKZIP64EXTRAFIELD *PRTZIPPKZIP64EXTRAFIELD;
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| 281 | AssertCompileSize(RTZIPPKZIP64EXTRAFIELD, 28);
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| 282 |
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| 283 | /**
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| 284 | * PKZip reader instance data.
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| 285 | */
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| 286 | typedef struct RTZIPPKZIPREADER
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| 287 | {
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| 288 | /** Set if we have the End of Central Directory record. */
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| 289 | bool fHaveEocd;
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| 290 | /** The Central Directory header. */
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| 291 | RTZIPPKZIPCENTRDIRHDR cdh;
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| 292 | /** ZIP64 extended information. */
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| 293 | RTZIPPKZIP64EXTRAFIELD cd64ex;
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| 294 | /** Set if ZIP64 End of Central Directory Locator is present (archive setting). */
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| 295 | bool fZip64Eocd;
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| 296 | /** Set if cd64ex is valid for the current file header (object setting). */
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| 297 | bool fZip64Ex;
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| 298 | /* The name of the current object. */
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| 299 | char szName[RTPATH_MAX];
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| 300 | } RTZIPPKZIPREADER;
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| 301 | /** Pointer to the PKZip reader instance data. */
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| 302 | typedef RTZIPPKZIPREADER *PRTZIPPKZIPREADER;
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| 303 |
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| 304 | /**
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| 305 | * Pkzip object (directory).
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| 306 | */
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| 307 | typedef struct RTZIPPKZIPBASEOBJ
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| 308 | {
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| 309 | /** Pointer to the reader instance data (resides in the filesystem
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| 310 | * stream). */
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| 311 | PRTZIPPKZIPREADER pPkzipReader;
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| 312 | /** The object info with unix attributes. */
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| 313 | RTFSOBJINFO ObjInfo;
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| 314 | } RTZIPPKZIPBASEOBJ;
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| 315 | /** Pointer to a PKZIP filesystem stream base object. */
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| 316 | typedef RTZIPPKZIPBASEOBJ *PRTZIPPKZIPBASEOBJ;
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| 317 |
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| 318 | /**
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| 319 | * Pkzip object (file) represented as a VFS I/O stream.
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| 320 | */
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| 321 | typedef struct RTZIPPKZIPIOSTREAM
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| 322 | {
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| 323 | /** The basic PKZIP object data. */
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| 324 | RTZIPPKZIPBASEOBJ BaseObj;
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| 325 | /** The number of (uncompressed) bytes in the file. */
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[51697] | 326 | uint64_t cbFile;
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[51696] | 327 | /** The current file position at uncompressed file data. */
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[51697] | 328 | uint64_t offFile;
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[51696] | 329 | /** The start position of the compressed data in the hVfsIos. */
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[51697] | 330 | uint64_t offCompStart;
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[51696] | 331 | /** The current position for decompressing bytes in the hVfsIos. */
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[51697] | 332 | uint64_t offComp;
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[51696] | 333 | /** The number of compressed bytes starting at offCompStart. */
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[51697] | 334 | uint64_t cbComp;
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[51696] | 335 | /** Set if we have to pass the type function the next time the input
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| 336 | * function is called. */
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| 337 | bool fPassZipType;
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| 338 | /** Set if we've reached the end of the file. */
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| 339 | bool fEndOfStream;
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| 340 | /** Pkzip compression method for this object. */
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| 341 | RTZIPPKZIP_COMP_METHOD enmCompMethod;
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| 342 | /** Zip compression method. */
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| 343 | RTZIPTYPE enmZipType;
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| 344 | /** The decompressor instance. */
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| 345 | PRTZIPDECOMP pZip;
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| 346 | /** The input I/O stream. */
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| 347 | RTVFSIOSTREAM hVfsIos;
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| 348 | } RTZIPPKZIPIOSTREAM;
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| 349 | /** Pointer to a the private data of a PKZIP file I/O stream. */
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| 350 | typedef RTZIPPKZIPIOSTREAM *PRTZIPPKZIPIOSTREAM;
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| 351 |
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| 352 |
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| 353 | /**
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| 354 | * PKZip filesystem stream private data. The stream must be seekable!
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| 355 | */
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| 356 | typedef struct RTZIPPKZIPFSSTREAM
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| 357 | {
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| 358 | /** The input I/O stream. */
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| 359 | RTVFSIOSTREAM hVfsIos;
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| 360 |
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| 361 | /** The current object (referenced). */
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| 362 | RTVFSOBJ hVfsCurObj;
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| 363 | /** Pointer to the private data if hVfsCurObj is representing a file. */
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| 364 | PRTZIPPKZIPIOSTREAM pCurIosData;
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| 365 |
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| 366 | /** The offset of the first Central Directory header. */
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[51697] | 367 | uint64_t offFirstCdh;
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[51696] | 368 | /** The offset of the next Central Directory header. */
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[51697] | 369 | uint64_t offNextCdh;
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[51696] | 370 |
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| 371 | /** Size of the central directory. */
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| 372 | uint64_t cbCentrDir;
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| 373 | /** Current central directory entry. */
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| 374 | uint64_t iCentrDirEntry;
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| 375 | /** Number of central directory entries. */
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| 376 | uint64_t cCentrDirEntries;
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| 377 |
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| 378 | /** Set if we have the End of Central Directory Record. */
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| 379 | bool fHaveEocd;
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| 380 | /** Set if we've reached the end of the stream. */
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| 381 | bool fEndOfStream;
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| 382 | /** Set if we've encountered a fatal error. */
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| 383 | int rcFatal;
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| 384 |
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| 385 | /** The PKZIP reader instance data. */
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| 386 | RTZIPPKZIPREADER PkzipReader;
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| 387 | } RTZIPPKZIPFSSTREAM;
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| 388 | /** Pointer to a the private data of a PKZIP filesystem stream. */
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| 389 | typedef RTZIPPKZIPFSSTREAM *PRTZIPPKZIPFSSTREAM;
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| 390 |
|
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| 391 |
|
---|
| 392 |
|
---|
| 393 | /**
|
---|
| 394 | * Decode date/time from DOS format as used in PKZip.
|
---|
| 395 | */
|
---|
| 396 | static int rtZipPkzipReaderDecodeDosTime(PRTTIMESPEC pTimeSpec, uint16_t u16Time, uint16_t u16Date)
|
---|
| 397 | {
|
---|
| 398 | RTTIME time;
|
---|
| 399 | RT_ZERO(time);
|
---|
| 400 | time.i32Year = ((u16Date & 0xfe00) >> 9) + 1980;
|
---|
| 401 | time.u8Month = (u16Date & 0x01e0) >> 5;
|
---|
| 402 | time.u8MonthDay = u16Date & 0x001f;
|
---|
| 403 | time.u8Hour = (u16Time & 0xf800) >> 11;
|
---|
| 404 | time.u8Minute = (u16Time & 0x07e0) >> 5;
|
---|
| 405 | time.u8Second = u16Time & 0x001f;
|
---|
| 406 | RTTimeNormalize(&time);
|
---|
| 407 | RTTimeImplode(pTimeSpec, &time);
|
---|
| 408 | return VINF_SUCCESS;
|
---|
| 409 | }
|
---|
| 410 |
|
---|
| 411 |
|
---|
| 412 | /**
|
---|
| 413 | * Parse the Local File Header.
|
---|
| 414 | * Just skip the data as we trust the Central Directory.
|
---|
| 415 | */
|
---|
| 416 | static int rtZipPkzipParseLocalFileHeader(PRTZIPPKZIPREADER pThis, PRTZIPPKZIPLOCALFILEHDR pLfh, size_t *pcbExtra)
|
---|
| 417 | {
|
---|
[62584] | 418 | RT_NOREF_PV(pThis);
|
---|
| 419 |
|
---|
[51696] | 420 | if (pLfh->cbFilename >= sizeof(pThis->szName))
|
---|
| 421 | return VERR_PKZIP_NAME_TOO_LONG;
|
---|
| 422 |
|
---|
| 423 | *pcbExtra = pLfh->cbFilename + pLfh->cbExtra;
|
---|
| 424 | return VINF_SUCCESS;
|
---|
| 425 | }
|
---|
| 426 |
|
---|
| 427 |
|
---|
| 428 | /**
|
---|
| 429 | * Parse the Central Directory Header.
|
---|
| 430 | */
|
---|
| 431 | static int rtZipPkzipParseCentrDirHeader(PRTZIPPKZIPREADER pThis, PRTZIPPKZIPCENTRDIRHDR pCdh, size_t *pcbExtra)
|
---|
| 432 | {
|
---|
| 433 | if (pCdh->u32Magic != RTZIPPKZIPCENTRDIRHDR_MAGIC)
|
---|
| 434 | return VERR_PKZIP_BAD_CDF_HEADER;
|
---|
| 435 |
|
---|
| 436 | if (pCdh->cbFilename >= sizeof(pThis->szName))
|
---|
| 437 | return VERR_PKZIP_NAME_TOO_LONG;
|
---|
| 438 |
|
---|
| 439 | *pcbExtra = pCdh->cbFilename + pCdh->cbExtra + pCdh->cbComment;
|
---|
| 440 |
|
---|
| 441 | pThis->cdh = *pCdh;
|
---|
| 442 | pThis->fZip64Ex = false;
|
---|
| 443 | return VINF_SUCCESS;
|
---|
| 444 | }
|
---|
| 445 |
|
---|
| 446 |
|
---|
| 447 | /**
|
---|
| 448 | * Return the offset of the Local File Header.
|
---|
| 449 | */
|
---|
[51697] | 450 | static uint64_t rtZipPkzipReaderOffLocalHeader(PRTZIPPKZIPREADER pThis)
|
---|
[51696] | 451 | {
|
---|
[51698] | 452 | if (pThis->fZip64Ex && pThis->cdh.offLocalFileHeader == (uint32_t)-1)
|
---|
[51696] | 453 | return pThis->cd64ex.offLocalFileHeader;
|
---|
| 454 |
|
---|
| 455 | return pThis->cdh.offLocalFileHeader;
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 |
|
---|
| 459 | /**
|
---|
| 460 | * Return the uncompressed object size.
|
---|
| 461 | */
|
---|
[51697] | 462 | static uint64_t rtZipPkzipReaderUncompressed(PRTZIPPKZIPREADER pThis)
|
---|
[51696] | 463 | {
|
---|
[51698] | 464 | if (pThis->fZip64Ex && pThis->cdh.cbUncompressed == (uint32_t)-1)
|
---|
[51696] | 465 | return pThis->cd64ex.cbUncompressed;
|
---|
[53624] | 466 |
|
---|
[51696] | 467 | return pThis->cdh.cbUncompressed;
|
---|
| 468 | }
|
---|
| 469 |
|
---|
| 470 |
|
---|
| 471 | /**
|
---|
| 472 | * Return the compressed object size.
|
---|
| 473 | */
|
---|
[51697] | 474 | static uint64_t rtZipPkzipReaderCompressed(PRTZIPPKZIPREADER pThis)
|
---|
[51696] | 475 | {
|
---|
[51698] | 476 | if (pThis->fZip64Ex && pThis->cdh.cbCompressed == (uint32_t)-1)
|
---|
[51696] | 477 | return pThis->cd64ex.cbCompressed;
|
---|
[53624] | 478 |
|
---|
[51696] | 479 | return pThis->cdh.cbCompressed;
|
---|
| 480 | }
|
---|
| 481 |
|
---|
| 482 |
|
---|
| 483 | /**
|
---|
| 484 | * Parse the extra part of the Central Directory Header.
|
---|
| 485 | */
|
---|
| 486 | static int rtZipPkzipParseCentrDirHeaderExtra(PRTZIPPKZIPREADER pThis, uint8_t *pu8Buf, size_t cb,
|
---|
[51697] | 487 | RTZIPPKZIP_COMP_METHOD *penmCompMethod, uint64_t *pcbCompressed)
|
---|
[51696] | 488 | {
|
---|
| 489 | int rc = RTStrCopyEx(pThis->szName, sizeof(pThis->szName), (const char*)pu8Buf, pThis->cdh.cbFilename);
|
---|
| 490 | if (RT_SUCCESS(rc))
|
---|
| 491 | {
|
---|
| 492 | pu8Buf += pThis->cdh.cbFilename;
|
---|
| 493 | cb = pThis->cdh.cbExtra;
|
---|
| 494 | while (cb >= 4)
|
---|
| 495 | {
|
---|
| 496 | uint16_t idExtra = *(uint16_t*)pu8Buf;
|
---|
| 497 | pu8Buf += 2;
|
---|
| 498 | uint16_t cbExtra = *(uint16_t*)pu8Buf;
|
---|
| 499 | pu8Buf += 2;
|
---|
| 500 | cb -= 4;
|
---|
| 501 |
|
---|
| 502 | if (cb >= cbExtra)
|
---|
| 503 | {
|
---|
| 504 | switch (idExtra)
|
---|
| 505 | {
|
---|
| 506 | case 0x0001:
|
---|
| 507 | /*
|
---|
| 508 | * ZIP64 Extended Information Extra Field.
|
---|
| 509 | */
|
---|
| 510 | if (!pThis->fZip64Eocd)
|
---|
| 511 | return VERR_PKZIP_ZIP64EX_IN_ZIP32;
|
---|
| 512 | /* Not all fields are really used. */
|
---|
| 513 | RT_ZERO(pThis->cd64ex);
|
---|
| 514 | memcpy(&pThis->cd64ex, pu8Buf, cbExtra);
|
---|
| 515 | pThis->fZip64Ex = true;
|
---|
| 516 | break;
|
---|
| 517 |
|
---|
| 518 | default:
|
---|
| 519 | /* unknown, just skip */
|
---|
| 520 | break;
|
---|
| 521 | }
|
---|
| 522 | pu8Buf += cbExtra;
|
---|
| 523 | cb -= cbExtra;
|
---|
| 524 | }
|
---|
| 525 | else
|
---|
| 526 | {
|
---|
| 527 | rc = VERR_PKZIP_BAD_CDF_HEADER;
|
---|
| 528 | break;
|
---|
| 529 | }
|
---|
| 530 | }
|
---|
| 531 |
|
---|
| 532 | *penmCompMethod = (RTZIPPKZIP_COMP_METHOD)pThis->cdh.u16ComprMethod;
|
---|
| 533 | *pcbCompressed = rtZipPkzipReaderCompressed(pThis);
|
---|
| 534 | }
|
---|
| 535 | return VINF_SUCCESS;
|
---|
| 536 | }
|
---|
| 537 |
|
---|
| 538 |
|
---|
| 539 | /**
|
---|
| 540 | * Translate a PKZip header to an IPRT object info structure.
|
---|
| 541 | */
|
---|
| 542 | static int rtZipPkzipReaderGetFsObjInfo(PRTZIPPKZIPREADER pThis, PRTFSOBJINFO pObjInfo)
|
---|
| 543 | {
|
---|
| 544 | /*
|
---|
| 545 | * Zap the whole structure, this takes care of unused space in the union.
|
---|
| 546 | */
|
---|
| 547 | RT_ZERO(*pObjInfo);
|
---|
| 548 | pObjInfo->cbObject = rtZipPkzipReaderUncompressed(pThis);
|
---|
| 549 | pObjInfo->cbAllocated = rtZipPkzipReaderUncompressed(pThis); /* XXX */
|
---|
| 550 | RTTIMESPEC ts;
|
---|
| 551 | rtZipPkzipReaderDecodeDosTime(&ts, pThis->cdh.u16LastModifiedTime, pThis->cdh.u16LastModifiedDate);
|
---|
| 552 | pObjInfo->ChangeTime = ts;
|
---|
| 553 | pObjInfo->ModificationTime = ts;
|
---|
| 554 | pObjInfo->AccessTime = ts;
|
---|
| 555 | pObjInfo->BirthTime = ts;
|
---|
| 556 | const char *pszEnd = strchr(pThis->szName, '\0');
|
---|
| 557 | if (pszEnd == &pThis->szName[0] || pszEnd[-1] != '/')
|
---|
[51712] | 558 | pObjInfo->Attr.fMode = RTFS_TYPE_FILE \
|
---|
| 559 | | RTFS_UNIX_IRUSR | RTFS_UNIX_IWUSR \
|
---|
| 560 | | RTFS_UNIX_IRGRP \
|
---|
| 561 | | RTFS_UNIX_IROTH;
|
---|
[51696] | 562 | else
|
---|
[51712] | 563 | pObjInfo->Attr.fMode = RTFS_TYPE_DIRECTORY \
|
---|
| 564 | | RTFS_UNIX_IRWXU \
|
---|
| 565 | | RTFS_UNIX_IRGRP | RTFS_UNIX_IXGRP \
|
---|
| 566 | | RTFS_UNIX_IROTH | RTFS_UNIX_IXOTH;
|
---|
[51696] | 567 | pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_UNIX;
|
---|
| 568 | pObjInfo->Attr.u.Unix.cHardlinks = 1;
|
---|
| 569 |
|
---|
| 570 | return VINF_SUCCESS;
|
---|
| 571 | }
|
---|
| 572 |
|
---|
| 573 |
|
---|
| 574 | /**
|
---|
| 575 | * Search the magic value of the End Of Central Directory Record.
|
---|
| 576 | *
|
---|
| 577 | * @returns true if found, false otherwise.
|
---|
| 578 | * @param pu8Buf buffer.
|
---|
| 579 | * @param cb size of buffer.
|
---|
| 580 | * @param piPos where to store the position of the magic value.
|
---|
| 581 | */
|
---|
| 582 | static bool rtZipPkzipReaderScanEocd(const uint8_t *pu8Buf, size_t cb, int *piPos)
|
---|
| 583 | {
|
---|
| 584 | if (cb < 4)
|
---|
| 585 | return false;
|
---|
[51699] | 586 | ssize_t i;
|
---|
| 587 | for (i = (ssize_t)cb - 4; i >= 0; --i)
|
---|
[51696] | 588 | if (*(uint32_t*)(pu8Buf + i) == RTZIPPKZIPENDOFCENTRDIRREC_MAGIC)
|
---|
| 589 | {
|
---|
| 590 | *piPos = i;
|
---|
| 591 | return true;
|
---|
| 592 | }
|
---|
| 593 | return false;
|
---|
| 594 | }
|
---|
| 595 |
|
---|
| 596 |
|
---|
| 597 | /**
|
---|
| 598 | * Read the Local File Header. We ignore the content -- we trust the Central
|
---|
| 599 | * Directory.
|
---|
| 600 | */
|
---|
[51697] | 601 | static int rtZipPkzipFssIosReadLfh(PRTZIPPKZIPFSSTREAM pThis, uint64_t *poffStartData)
|
---|
[51696] | 602 | {
|
---|
| 603 | RTZIPPKZIPLOCALFILEHDR lfh;
|
---|
[51697] | 604 | uint64_t offLocalFileHeader = rtZipPkzipReaderOffLocalHeader(&pThis->PkzipReader);
|
---|
[51696] | 605 | int rc = RTVfsIoStrmReadAt(pThis->hVfsIos, offLocalFileHeader,
|
---|
| 606 | &lfh, sizeof(lfh) - 1, true /*fBlocking*/, NULL);
|
---|
| 607 | if (RT_SUCCESS(rc))
|
---|
| 608 | {
|
---|
| 609 | if (lfh.u32Magic == RTZIPPKZIPLOCALFILEHDR_MAGIC)
|
---|
| 610 | {
|
---|
[51701] | 611 | size_t cbExtra = 0;
|
---|
[51696] | 612 | rc = rtZipPkzipParseLocalFileHeader(&pThis->PkzipReader, &lfh, &cbExtra);
|
---|
| 613 | if (RT_SUCCESS(rc))
|
---|
| 614 | {
|
---|
| 615 | /* Just skip the file name and and extra field. We use the data
|
---|
| 616 | * from the Central Directory Header. */
|
---|
| 617 | rc = RTVfsIoStrmSkip(pThis->hVfsIos, cbExtra);
|
---|
| 618 | if (RT_SUCCESS(rc))
|
---|
| 619 | *poffStartData = offLocalFileHeader + sizeof(lfh) - 1 + cbExtra;
|
---|
| 620 | }
|
---|
| 621 | }
|
---|
| 622 | else
|
---|
| 623 | rc = VERR_PKZIP_BAD_LF_HEADER;
|
---|
| 624 | }
|
---|
| 625 |
|
---|
| 626 | return rc;
|
---|
| 627 | }
|
---|
| 628 |
|
---|
| 629 |
|
---|
| 630 | /**
|
---|
| 631 | * Scan the current Central Directory Header.
|
---|
| 632 | */
|
---|
[51697] | 633 | static int rtZipPkzipFssIosReadCdh(PRTZIPPKZIPFSSTREAM pThis, uint64_t *poffStartData,
|
---|
| 634 | RTZIPPKZIP_COMP_METHOD *penmCompMethod, uint64_t *pcbCompressed)
|
---|
[51696] | 635 | {
|
---|
| 636 | int rc;
|
---|
| 637 |
|
---|
[51697] | 638 | uint64_t offCd = pThis->offNextCdh - pThis->offFirstCdh;
|
---|
[51696] | 639 | if ( pThis->iCentrDirEntry < pThis->cCentrDirEntries
|
---|
| 640 | || offCd + sizeof(RTZIPPKZIPCENTRDIRHDR) - 1 <= pThis->cbCentrDir)
|
---|
| 641 | {
|
---|
| 642 | RTZIPPKZIPCENTRDIRHDR cdh;
|
---|
| 643 | rc = RTVfsIoStrmReadAt(pThis->hVfsIos, pThis->offNextCdh,
|
---|
| 644 | &cdh, sizeof(cdh) - 1, true /*fBlocking*/, NULL);
|
---|
| 645 | if (RT_SUCCESS(rc))
|
---|
| 646 | {
|
---|
| 647 | pThis->offNextCdh += sizeof(cdh) - 1;
|
---|
| 648 | pThis->iCentrDirEntry++;
|
---|
[51701] | 649 | size_t cbExtra = 0;
|
---|
[51696] | 650 | rc = rtZipPkzipParseCentrDirHeader(&pThis->PkzipReader, &cdh, &cbExtra);
|
---|
| 651 | if (RT_SUCCESS(rc))
|
---|
| 652 | {
|
---|
| 653 | if (offCd + sizeof(RTZIPPKZIPCENTRDIRHDR) - 1 + cbExtra <= pThis->cbCentrDir)
|
---|
| 654 | {
|
---|
| 655 | /* extra data up to 64k */
|
---|
| 656 | uint8_t *pu8Buf = (uint8_t*)RTMemTmpAlloc(cbExtra);
|
---|
| 657 | if (pu8Buf)
|
---|
| 658 | {
|
---|
| 659 | rc = RTVfsIoStrmRead(pThis->hVfsIos, pu8Buf, cbExtra, true /*fBlocking*/, NULL);
|
---|
| 660 | if (RT_SUCCESS(rc))
|
---|
| 661 | {
|
---|
| 662 | rc = rtZipPkzipParseCentrDirHeaderExtra(&pThis->PkzipReader, pu8Buf, cbExtra,
|
---|
| 663 | penmCompMethod, pcbCompressed);
|
---|
| 664 | if (RT_SUCCESS(rc))
|
---|
| 665 | rc = rtZipPkzipFssIosReadLfh(pThis, poffStartData);
|
---|
| 666 | }
|
---|
| 667 | pThis->offNextCdh += cbExtra;
|
---|
| 668 | RTMemTmpFree(pu8Buf);
|
---|
| 669 | }
|
---|
| 670 | else
|
---|
| 671 | rc = VERR_NO_MEMORY;
|
---|
| 672 | }
|
---|
| 673 | else
|
---|
| 674 | rc = VERR_EOF;
|
---|
| 675 | }
|
---|
| 676 | }
|
---|
| 677 | }
|
---|
| 678 | else
|
---|
| 679 | rc = VERR_EOF;
|
---|
| 680 |
|
---|
| 681 | return rc;
|
---|
| 682 | }
|
---|
| 683 |
|
---|
| 684 |
|
---|
| 685 | /**
|
---|
| 686 | * Scan for the End of Central Directory Record. Of course this works not if
|
---|
| 687 | * the stream is non-seekable (i.e. a pipe).
|
---|
| 688 | */
|
---|
| 689 | static int rtZipPkzipFssIosReadEocb(PRTZIPPKZIPFSSTREAM pThis)
|
---|
| 690 | {
|
---|
[51712] | 691 | RTFSOBJINFO Info;
|
---|
| 692 | int rc = RTVfsIoStrmQueryInfo(pThis->hVfsIos, &Info, RTFSOBJATTRADD_UNIX);
|
---|
[51696] | 693 | if (RT_FAILURE(rc))
|
---|
| 694 | return rc;
|
---|
| 695 |
|
---|
[51712] | 696 | uint64_t cbFile = Info.cbObject;
|
---|
[51696] | 697 | if (cbFile < sizeof(RTZIPPKZIPENDOFCENTRDIRREC)-1)
|
---|
| 698 | return VERR_PKZIP_NO_EOCB;
|
---|
| 699 |
|
---|
| 700 | /* search for start of the 'end of Central Directory Record' */
|
---|
| 701 | size_t cbBuf = RT_MIN(_1K, cbFile);
|
---|
| 702 | uint8_t *pu8Buf = (uint8_t*)RTMemTmpAlloc(cbBuf);
|
---|
| 703 | if (!pu8Buf)
|
---|
| 704 | return VERR_NO_MEMORY;
|
---|
| 705 |
|
---|
| 706 | /* maximum size of EOCD comment 2^16-1 */
|
---|
| 707 | const size_t cbHdrMax = 0xffff + sizeof(RTZIPPKZIPENDOFCENTRDIRREC) - 1;
|
---|
[51697] | 708 | uint64_t offMin = cbFile >= cbHdrMax ? cbFile - cbHdrMax : 0;
|
---|
[51696] | 709 |
|
---|
[51697] | 710 | uint64_t off = cbFile - cbBuf;
|
---|
[51696] | 711 | while (off >= offMin)
|
---|
| 712 | {
|
---|
| 713 | rc = RTVfsIoStrmReadAt(pThis->hVfsIos, off, pu8Buf, cbBuf, true /*fBlocking*/, NULL);
|
---|
| 714 | if (RT_FAILURE(rc))
|
---|
| 715 | break;
|
---|
| 716 | int offMagic;
|
---|
| 717 | if (rtZipPkzipReaderScanEocd(pu8Buf, cbBuf, &offMagic))
|
---|
| 718 | {
|
---|
| 719 | off += offMagic;
|
---|
| 720 | RTZIPPKZIPENDOFCENTRDIRREC eocd;
|
---|
| 721 | rc = RTVfsIoStrmReadAt(pThis->hVfsIos, off, &eocd, sizeof(eocd) - 1,
|
---|
| 722 | true /*fBlocking*/, NULL);
|
---|
| 723 | if (RT_SUCCESS(rc))
|
---|
| 724 | {
|
---|
| 725 | /* well, this shouldn't fail if the content didn't change */
|
---|
| 726 | if (eocd.u32Magic == RTZIPPKZIPENDOFCENTRDIRREC_MAGIC)
|
---|
| 727 | {
|
---|
| 728 | /* sanity check */
|
---|
[73097] | 729 | if (off + RT_UOFFSETOF(RTZIPPKZIPENDOFCENTRDIRREC, u8Comment) + eocd.cbComment == cbFile)
|
---|
[51696] | 730 | {
|
---|
| 731 | pThis->offFirstCdh = eocd.offCentrDir;
|
---|
| 732 | pThis->offNextCdh = eocd.offCentrDir;
|
---|
| 733 | pThis->iCentrDirEntry = 0;
|
---|
| 734 | pThis->cCentrDirEntries = eocd.cCentrDirRecords;
|
---|
| 735 | pThis->cbCentrDir = eocd.cbCentrDir;
|
---|
| 736 | pThis->PkzipReader.fHaveEocd = true;
|
---|
| 737 | }
|
---|
| 738 | else
|
---|
| 739 | rc = VERR_PKZIP_NO_EOCB;
|
---|
| 740 | }
|
---|
| 741 | else
|
---|
| 742 | rc = VERR_PKZIP_NO_EOCB;
|
---|
| 743 | }
|
---|
| 744 | if (rc != VERR_PKZIP_NO_EOCB)
|
---|
| 745 | break;
|
---|
| 746 | }
|
---|
| 747 | else
|
---|
| 748 | rc = VERR_PKZIP_NO_EOCB;
|
---|
| 749 | /* overlap the following read */
|
---|
| 750 | off -= cbBuf - 4;
|
---|
| 751 | }
|
---|
| 752 |
|
---|
| 753 | RTMemTmpFree(pu8Buf);
|
---|
| 754 |
|
---|
| 755 | /*
|
---|
| 756 | * Now check for the presence of the Zip64 End of Central Directory Locator.
|
---|
| 757 | */
|
---|
| 758 | if ( RT_SUCCESS(rc)
|
---|
| 759 | && off > (unsigned)sizeof(RTZIPPKZIP64ENDOFCENTRDIRLOC))
|
---|
| 760 | {
|
---|
| 761 | off -= sizeof(RTZIPPKZIP64ENDOFCENTRDIRLOC);
|
---|
| 762 |
|
---|
| 763 | RTZIPPKZIP64ENDOFCENTRDIRLOC eocd64loc;
|
---|
| 764 | rc = RTVfsIoStrmReadAt(pThis->hVfsIos, off, &eocd64loc, sizeof(eocd64loc), true /*fBlocking*/, NULL);
|
---|
| 765 | if (RT_SUCCESS(rc))
|
---|
| 766 | {
|
---|
| 767 | if (eocd64loc.u32Magic == RTZIPPKZIP64ENDOFCENTRDIRLOC_MAGIC)
|
---|
| 768 | pThis->PkzipReader.fZip64Eocd = true;
|
---|
| 769 | }
|
---|
| 770 | }
|
---|
| 771 | return rc;
|
---|
| 772 | }
|
---|
| 773 |
|
---|
| 774 |
|
---|
| 775 | /**
|
---|
| 776 | * @interface_method_impl{RTVFSOBJOPS,pfnClose}
|
---|
| 777 | */
|
---|
| 778 | static DECLCALLBACK(int) rtZipPkzipFssBaseObj_Close(void *pvThis)
|
---|
| 779 | {
|
---|
[62448] | 780 | NOREF(pvThis);
|
---|
[51696] | 781 | return VINF_SUCCESS;
|
---|
| 782 | }
|
---|
| 783 |
|
---|
| 784 |
|
---|
| 785 | /**
|
---|
| 786 | * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo}
|
---|
| 787 | */
|
---|
| 788 | static DECLCALLBACK(int) rtZipPkzipFssBaseObj_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
| 789 | {
|
---|
| 790 | PRTZIPPKZIPBASEOBJ pThis = (PRTZIPPKZIPBASEOBJ)pvThis;
|
---|
| 791 |
|
---|
| 792 | /*
|
---|
| 793 | * Copy the desired data.
|
---|
| 794 | */
|
---|
| 795 | switch (enmAddAttr)
|
---|
| 796 | {
|
---|
| 797 | case RTFSOBJATTRADD_NOTHING:
|
---|
| 798 | case RTFSOBJATTRADD_UNIX:
|
---|
| 799 | *pObjInfo = pThis->ObjInfo;
|
---|
| 800 | break;
|
---|
| 801 |
|
---|
| 802 | case RTFSOBJATTRADD_UNIX_OWNER:
|
---|
| 803 | *pObjInfo = pThis->ObjInfo;
|
---|
| 804 | break;
|
---|
| 805 |
|
---|
| 806 | case RTFSOBJATTRADD_UNIX_GROUP:
|
---|
| 807 | *pObjInfo = pThis->ObjInfo;
|
---|
| 808 | break;
|
---|
| 809 |
|
---|
| 810 | case RTFSOBJATTRADD_EASIZE:
|
---|
| 811 | *pObjInfo = pThis->ObjInfo;
|
---|
| 812 | break;
|
---|
| 813 |
|
---|
| 814 | default:
|
---|
| 815 | return VERR_NOT_SUPPORTED;
|
---|
| 816 | }
|
---|
| 817 |
|
---|
| 818 | return VINF_SUCCESS;
|
---|
| 819 | }
|
---|
| 820 |
|
---|
| 821 |
|
---|
| 822 | /**
|
---|
| 823 | * PKZip filesystem base object operations (directory objects).
|
---|
| 824 | */
|
---|
| 825 | static const RTVFSOBJOPS g_rtZipPkzipFssBaseObjOps =
|
---|
| 826 | {
|
---|
| 827 | RTVFSOBJOPS_VERSION,
|
---|
| 828 | RTVFSOBJTYPE_BASE,
|
---|
| 829 | "PkzipFsStream::Obj",
|
---|
| 830 | rtZipPkzipFssBaseObj_Close,
|
---|
| 831 | rtZipPkzipFssBaseObj_QueryInfo,
|
---|
[94291] | 832 | NULL,
|
---|
[51696] | 833 | RTVFSOBJOPS_VERSION
|
---|
| 834 | };
|
---|
| 835 |
|
---|
| 836 |
|
---|
| 837 | /**
|
---|
| 838 | * @interface_method_impl{RTVFSOBJOPS,pfnClose}
|
---|
| 839 | */
|
---|
| 840 | static DECLCALLBACK(int) rtZipPkzipFssIos_Close(void *pvThis)
|
---|
| 841 | {
|
---|
| 842 | PRTZIPPKZIPIOSTREAM pThis = (PRTZIPPKZIPIOSTREAM)pvThis;
|
---|
| 843 |
|
---|
| 844 | RTVfsIoStrmRelease(pThis->hVfsIos);
|
---|
| 845 | pThis->hVfsIos = NIL_RTVFSIOSTREAM;
|
---|
| 846 |
|
---|
| 847 | if (pThis->pZip)
|
---|
| 848 | {
|
---|
| 849 | RTZipDecompDestroy(pThis->pZip);
|
---|
| 850 | pThis->pZip = NULL;
|
---|
| 851 | }
|
---|
| 852 |
|
---|
| 853 | return rtZipPkzipFssBaseObj_Close(&pThis->BaseObj);
|
---|
| 854 | }
|
---|
| 855 |
|
---|
| 856 |
|
---|
| 857 | /**
|
---|
| 858 | * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo}
|
---|
| 859 | */
|
---|
| 860 | static DECLCALLBACK(int) rtZipPkzipFssIos_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
| 861 | {
|
---|
| 862 | PRTZIPPKZIPIOSTREAM pThis = (PRTZIPPKZIPIOSTREAM)pvThis;
|
---|
| 863 | return rtZipPkzipFssBaseObj_QueryInfo(&pThis->BaseObj, pObjInfo, enmAddAttr);
|
---|
| 864 | }
|
---|
| 865 |
|
---|
| 866 |
|
---|
| 867 | /**
|
---|
| 868 | * Callback function for rtZipPkzipFssIos_Read. For feeding compressed data
|
---|
| 869 | * into the decompressor function.
|
---|
| 870 | */
|
---|
| 871 | static DECLCALLBACK(int) rtZipPkzipFssIosReadHelper(void *pvThis, void *pvBuf, size_t cbToRead, size_t *pcbRead)
|
---|
| 872 | {
|
---|
| 873 | PRTZIPPKZIPIOSTREAM pThis = (PRTZIPPKZIPIOSTREAM)pvThis;
|
---|
| 874 | int rc = VINF_SUCCESS;
|
---|
| 875 | if (!cbToRead)
|
---|
| 876 | return rc;
|
---|
| 877 | if ( pThis->fPassZipType
|
---|
| 878 | && cbToRead > 0)
|
---|
| 879 | {
|
---|
| 880 | uint8_t *pu8Buf = (uint8_t*)pvBuf;
|
---|
| 881 | pu8Buf[0] = pThis->enmZipType;
|
---|
| 882 | pvBuf = &pu8Buf[1];
|
---|
| 883 | cbToRead--;
|
---|
| 884 | pThis->fPassZipType = false;
|
---|
| 885 | }
|
---|
| 886 | if (cbToRead > 0)
|
---|
| 887 | {
|
---|
| 888 | size_t cbRead = 0;
|
---|
| 889 | const size_t cbAvail = pThis->cbComp;
|
---|
| 890 | rc = RTVfsIoStrmReadAt(pThis->hVfsIos, pThis->offComp, pvBuf,
|
---|
| 891 | RT_MIN(cbToRead, cbAvail), true /*fBlocking*/, &cbRead);
|
---|
| 892 | if ( RT_SUCCESS(rc)
|
---|
| 893 | && cbToRead > cbAvail)
|
---|
| 894 | rc = pcbRead ? VINF_EOF : VERR_EOF;
|
---|
| 895 | if ( rc == VINF_EOF
|
---|
| 896 | && !pcbRead)
|
---|
| 897 | rc = VERR_EOF;
|
---|
| 898 | pThis->offComp += cbRead;
|
---|
| 899 | if (pcbRead)
|
---|
| 900 | *pcbRead = cbRead;
|
---|
| 901 | }
|
---|
| 902 | return rc;
|
---|
| 903 | }
|
---|
| 904 |
|
---|
| 905 |
|
---|
| 906 | /**
|
---|
| 907 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnRead}
|
---|
| 908 | */
|
---|
[100908] | 909 | static DECLCALLBACK(int) rtZipPkzipFssIos_Read(void *pvThis, RTFOFF off, PRTSGBUF pSgBuf, bool fBlocking, size_t *pcbRead)
|
---|
[51696] | 910 | {
|
---|
| 911 | PRTZIPPKZIPIOSTREAM pThis = (PRTZIPPKZIPIOSTREAM)pvThis;
|
---|
| 912 | Assert(pSgBuf->cSegs == 1);
|
---|
[62564] | 913 | RT_NOREF_PV(fBlocking);
|
---|
[51696] | 914 |
|
---|
| 915 | if (off < 0)
|
---|
| 916 | off = pThis->offFile;
|
---|
[51697] | 917 | if (off >= (RTFOFF)pThis->cbFile)
|
---|
[51696] | 918 | return pcbRead ? VINF_EOF : VERR_EOF;
|
---|
| 919 |
|
---|
| 920 | Assert(pThis->cbFile >= pThis->offFile);
|
---|
| 921 | uint64_t cbLeft = (uint64_t)(pThis->cbFile - pThis->offFile);
|
---|
| 922 | size_t cbToRead = pSgBuf->paSegs[0].cbSeg;
|
---|
| 923 | if (cbToRead > cbLeft)
|
---|
| 924 | {
|
---|
| 925 | if (!pcbRead)
|
---|
| 926 | return VERR_EOF;
|
---|
| 927 | cbToRead = (size_t)cbLeft;
|
---|
| 928 | }
|
---|
| 929 |
|
---|
| 930 | /*
|
---|
| 931 | * Restart decompression at start of stream or on backward seeking.
|
---|
| 932 | */
|
---|
| 933 | if ( !pThis->pZip
|
---|
| 934 | || !off
|
---|
[51697] | 935 | || off < (RTFOFF)pThis->offFile)
|
---|
[51696] | 936 | {
|
---|
| 937 | switch (pThis->enmCompMethod)
|
---|
| 938 | {
|
---|
| 939 | case RTZIPPKZIP_COMP_METHOD_STORED:
|
---|
| 940 | pThis->enmZipType = RTZIPTYPE_STORE;
|
---|
| 941 | break;
|
---|
| 942 |
|
---|
| 943 | case RTZIPPKZIP_COMP_METHOD_DEFLATED:
|
---|
| 944 | pThis->enmZipType = RTZIPTYPE_ZLIB_NO_HEADER;
|
---|
| 945 | break;
|
---|
| 946 |
|
---|
| 947 | default:
|
---|
| 948 | pThis->enmZipType = RTZIPTYPE_INVALID;
|
---|
| 949 | break;
|
---|
| 950 | }
|
---|
| 951 |
|
---|
| 952 | if (pThis->pZip)
|
---|
| 953 | {
|
---|
| 954 | RTZipDecompDestroy(pThis->pZip);
|
---|
| 955 | pThis->pZip = NULL;
|
---|
| 956 | }
|
---|
| 957 | int rc = RTZipDecompCreate(&pThis->pZip, (void*)pThis, rtZipPkzipFssIosReadHelper);
|
---|
| 958 | if (RT_FAILURE(rc))
|
---|
| 959 | return rc;
|
---|
| 960 | }
|
---|
| 961 |
|
---|
| 962 | /*
|
---|
| 963 | * Skip bytes if necessary.
|
---|
| 964 | */
|
---|
[51697] | 965 | if (off > (RTFOFF)pThis->offFile)
|
---|
[51696] | 966 | {
|
---|
| 967 | uint8_t u8Buf[_1K];
|
---|
[51697] | 968 | while (off > (RTFOFF)pThis->offFile)
|
---|
[51696] | 969 | {
|
---|
| 970 | size_t cbSkip = off - pThis->offFile;
|
---|
| 971 | if (cbSkip > sizeof(u8Buf))
|
---|
| 972 | cbSkip = sizeof(u8Buf);
|
---|
| 973 | int rc = RTZipDecompress(pThis->pZip, u8Buf, cbSkip, NULL);
|
---|
| 974 | if (RT_FAILURE(rc))
|
---|
| 975 | return rc;
|
---|
| 976 | pThis->offFile += cbSkip;
|
---|
| 977 | }
|
---|
| 978 | }
|
---|
| 979 |
|
---|
| 980 | /*
|
---|
| 981 | * Do the actual reading.
|
---|
| 982 | */
|
---|
| 983 | size_t cbReadStack = 0;
|
---|
| 984 | if (!pcbRead)
|
---|
| 985 | pcbRead = &cbReadStack;
|
---|
| 986 | int rc = RTZipDecompress(pThis->pZip, pSgBuf->paSegs[0].pvSeg, cbToRead, pcbRead);
|
---|
| 987 | pThis->offFile = off + *pcbRead;
|
---|
[100908] | 988 | RTSgBufAdvance(pSgBuf, *pcbRead);
|
---|
| 989 |
|
---|
[51696] | 990 | if (pThis->offFile >= pThis->cbFile)
|
---|
| 991 | {
|
---|
| 992 | Assert(pThis->offFile == pThis->cbFile);
|
---|
| 993 | pThis->fEndOfStream = true;
|
---|
| 994 | }
|
---|
| 995 |
|
---|
| 996 | return rc;
|
---|
| 997 | }
|
---|
| 998 |
|
---|
[100908] | 999 | static DECLCALLBACK(int) rtZipPkzipFssIos_Write(void *pvThis, RTFOFF off, PRTSGBUF pSgBuf, bool fBlocking, size_t *pcbWritten)
|
---|
[51739] | 1000 | {
|
---|
[62564] | 1001 | RT_NOREF_PV(pvThis); RT_NOREF_PV(off); RT_NOREF_PV(pSgBuf); RT_NOREF_PV(fBlocking); RT_NOREF_PV(pcbWritten);
|
---|
[51739] | 1002 | return VERR_NOT_IMPLEMENTED;
|
---|
| 1003 | }
|
---|
[51696] | 1004 |
|
---|
[51739] | 1005 | static DECLCALLBACK(int) rtZipPkzipFssIos_Flush(void *pvThis)
|
---|
| 1006 | {
|
---|
[62564] | 1007 | RT_NOREF_PV(pvThis);
|
---|
[51739] | 1008 | return VERR_NOT_IMPLEMENTED;
|
---|
| 1009 | }
|
---|
| 1010 |
|
---|
[51696] | 1011 | /**
|
---|
| 1012 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnPollOne}
|
---|
| 1013 | */
|
---|
| 1014 | static DECLCALLBACK(int) rtZipPkzipFssIos_PollOne(void *pvThis, uint32_t fEvents, RTMSINTERVAL cMillies,
|
---|
| 1015 | bool fIntr, uint32_t *pfRetEvents)
|
---|
| 1016 | {
|
---|
| 1017 | PRTZIPPKZIPIOSTREAM pThis = (PRTZIPPKZIPIOSTREAM)pvThis;
|
---|
| 1018 |
|
---|
| 1019 | /* When we've reached the end, read will be set to indicate it. */
|
---|
| 1020 | if ( (fEvents & RTPOLL_EVT_READ)
|
---|
| 1021 | && pThis->fEndOfStream)
|
---|
| 1022 | {
|
---|
| 1023 | int rc = RTVfsIoStrmPoll(pThis->hVfsIos, fEvents, 0, fIntr, pfRetEvents);
|
---|
| 1024 | if (RT_SUCCESS(rc))
|
---|
| 1025 | *pfRetEvents |= RTPOLL_EVT_READ;
|
---|
| 1026 | else
|
---|
| 1027 | *pfRetEvents = RTPOLL_EVT_READ;
|
---|
| 1028 | return VINF_SUCCESS;
|
---|
| 1029 | }
|
---|
| 1030 |
|
---|
| 1031 | return RTVfsIoStrmPoll(pThis->hVfsIos, fEvents, cMillies, fIntr, pfRetEvents);
|
---|
| 1032 | }
|
---|
| 1033 |
|
---|
| 1034 |
|
---|
| 1035 | /**
|
---|
| 1036 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnTell}
|
---|
| 1037 | */
|
---|
| 1038 | static DECLCALLBACK(int) rtZipPkzipFssIos_Tell(void *pvThis, PRTFOFF poffActual)
|
---|
| 1039 | {
|
---|
| 1040 | PRTZIPPKZIPIOSTREAM pThis = (PRTZIPPKZIPIOSTREAM)pvThis;
|
---|
| 1041 | *poffActual = pThis->offFile;
|
---|
| 1042 | return VINF_SUCCESS;
|
---|
| 1043 | }
|
---|
| 1044 |
|
---|
| 1045 |
|
---|
| 1046 | /**
|
---|
| 1047 | * Pkzip I/O object stream operations.
|
---|
| 1048 | */
|
---|
| 1049 | static const RTVFSIOSTREAMOPS g_rtZipPkzipFssIosOps =
|
---|
| 1050 | {
|
---|
| 1051 | { /* Obj */
|
---|
| 1052 | RTVFSOBJOPS_VERSION,
|
---|
| 1053 | RTVFSOBJTYPE_IO_STREAM,
|
---|
| 1054 | "PkzipFsStream::IoStream",
|
---|
| 1055 | rtZipPkzipFssIos_Close,
|
---|
| 1056 | rtZipPkzipFssIos_QueryInfo,
|
---|
[94291] | 1057 | NULL,
|
---|
[51696] | 1058 | RTVFSOBJOPS_VERSION
|
---|
| 1059 | },
|
---|
| 1060 | RTVFSIOSTREAMOPS_VERSION,
|
---|
| 1061 | RTVFSIOSTREAMOPS_FEAT_NO_SG,
|
---|
| 1062 | rtZipPkzipFssIos_Read,
|
---|
[51739] | 1063 | rtZipPkzipFssIos_Write,
|
---|
| 1064 | rtZipPkzipFssIos_Flush,
|
---|
[51696] | 1065 | rtZipPkzipFssIos_PollOne,
|
---|
| 1066 | rtZipPkzipFssIos_Tell,
|
---|
| 1067 | NULL /*Skip*/,
|
---|
| 1068 | NULL /*ZeroFill*/,
|
---|
| 1069 | RTVFSIOSTREAMOPS_VERSION
|
---|
| 1070 | };
|
---|
| 1071 |
|
---|
| 1072 | /**
|
---|
| 1073 | * @interface_method_impl{RTVFSOBJOPS,pfnClose}
|
---|
| 1074 | */
|
---|
| 1075 | static DECLCALLBACK(int) rtZipPkzipFss_Close(void *pvThis)
|
---|
| 1076 | {
|
---|
| 1077 | PRTZIPPKZIPFSSTREAM pThis = (PRTZIPPKZIPFSSTREAM)pvThis;
|
---|
| 1078 |
|
---|
| 1079 | RTVfsObjRelease(pThis->hVfsCurObj);
|
---|
| 1080 | pThis->hVfsCurObj = NIL_RTVFSOBJ;
|
---|
| 1081 | pThis->pCurIosData = NULL;
|
---|
| 1082 |
|
---|
| 1083 | RTVfsIoStrmRelease(pThis->hVfsIos);
|
---|
| 1084 | pThis->hVfsIos = NIL_RTVFSIOSTREAM;
|
---|
| 1085 |
|
---|
| 1086 | return VINF_SUCCESS;
|
---|
| 1087 | }
|
---|
| 1088 |
|
---|
| 1089 |
|
---|
| 1090 | /**
|
---|
| 1091 | * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo}
|
---|
| 1092 | */
|
---|
| 1093 | static DECLCALLBACK(int) rtZipPkzipFss_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
| 1094 | {
|
---|
| 1095 | PRTZIPPKZIPFSSTREAM pThis = (PRTZIPPKZIPFSSTREAM)pvThis;
|
---|
| 1096 | /* Take the lazy approach here, with the sideffect of providing some info
|
---|
| 1097 | that is actually kind of useful. */
|
---|
| 1098 | return RTVfsIoStrmQueryInfo(pThis->hVfsIos, pObjInfo, enmAddAttr);
|
---|
| 1099 | }
|
---|
| 1100 |
|
---|
| 1101 |
|
---|
| 1102 | /**
|
---|
| 1103 | * @interface_method_impl{RTVFSFSSTREAMOPS,pfnNext}
|
---|
| 1104 | */
|
---|
| 1105 | static DECLCALLBACK(int) rtZipPkzipFss_Next(void *pvThis, char **ppszName, RTVFSOBJTYPE *penmType, PRTVFSOBJ phVfsObj)
|
---|
| 1106 | {
|
---|
| 1107 | PRTZIPPKZIPFSSTREAM pThis = (PRTZIPPKZIPFSSTREAM)pvThis;
|
---|
| 1108 |
|
---|
| 1109 | /*
|
---|
| 1110 | * Dispense with the current object.
|
---|
| 1111 | */
|
---|
| 1112 | if (pThis->hVfsCurObj != NIL_RTVFSOBJ)
|
---|
| 1113 | {
|
---|
| 1114 | if (pThis->pCurIosData)
|
---|
| 1115 | {
|
---|
| 1116 | pThis->pCurIosData->fEndOfStream = true;
|
---|
| 1117 | pThis->pCurIosData->offFile = pThis->pCurIosData->cbFile;
|
---|
| 1118 | pThis->pCurIosData = NULL;
|
---|
| 1119 | }
|
---|
| 1120 |
|
---|
| 1121 | RTVfsObjRelease(pThis->hVfsCurObj);
|
---|
| 1122 | pThis->hVfsCurObj = NIL_RTVFSOBJ;
|
---|
| 1123 | }
|
---|
| 1124 |
|
---|
| 1125 | /*
|
---|
| 1126 | * Check if we've already reached the end in some way.
|
---|
| 1127 | */
|
---|
| 1128 | if (pThis->fEndOfStream)
|
---|
| 1129 | return VERR_EOF;
|
---|
| 1130 | if (pThis->rcFatal != VINF_SUCCESS)
|
---|
| 1131 | return pThis->rcFatal;
|
---|
| 1132 |
|
---|
| 1133 | int rc = VINF_SUCCESS;
|
---|
| 1134 |
|
---|
| 1135 | /*
|
---|
| 1136 | * Read the end of Central Directory Record once.
|
---|
| 1137 | */
|
---|
| 1138 | if (!pThis->PkzipReader.fHaveEocd)
|
---|
| 1139 | rc = rtZipPkzipFssIosReadEocb(pThis);
|
---|
[51697] | 1140 | uint64_t offData = 0;
|
---|
[51696] | 1141 |
|
---|
| 1142 | /*
|
---|
| 1143 | * Parse the current Central Directory Header.
|
---|
| 1144 | */
|
---|
| 1145 | RTZIPPKZIP_COMP_METHOD enmCompMethod = RTZIPPKZIP_COMP_METHOD_STORED;
|
---|
[51697] | 1146 | uint64_t cbCompressed = 0;
|
---|
[51696] | 1147 | if (RT_SUCCESS(rc))
|
---|
| 1148 | rc = rtZipPkzipFssIosReadCdh(pThis, &offData, &enmCompMethod, &cbCompressed);
|
---|
| 1149 | if (RT_FAILURE(rc))
|
---|
| 1150 | return pThis->rcFatal = rc;
|
---|
| 1151 |
|
---|
| 1152 | /*
|
---|
| 1153 | * Fill an object info structure from the current Pkzip state.
|
---|
| 1154 | */
|
---|
| 1155 | RTFSOBJINFO Info;
|
---|
| 1156 | rc = rtZipPkzipReaderGetFsObjInfo(&pThis->PkzipReader, &Info);
|
---|
| 1157 | if (RT_FAILURE(rc))
|
---|
| 1158 | return pThis->rcFatal = rc;
|
---|
| 1159 |
|
---|
| 1160 | /*
|
---|
| 1161 | * Create an object of the appropriate type.
|
---|
| 1162 | */
|
---|
| 1163 | RTVFSOBJTYPE enmType;
|
---|
| 1164 | RTVFSOBJ hVfsObj;
|
---|
| 1165 | RTFMODE fType = Info.Attr.fMode & RTFS_TYPE_MASK;
|
---|
| 1166 | switch (fType)
|
---|
| 1167 | {
|
---|
| 1168 | case RTFS_TYPE_FILE:
|
---|
| 1169 | RTVFSIOSTREAM hVfsIos;
|
---|
| 1170 | PRTZIPPKZIPIOSTREAM pIosData;
|
---|
| 1171 | rc = RTVfsNewIoStream(&g_rtZipPkzipFssIosOps,
|
---|
| 1172 | sizeof(*pIosData),
|
---|
| 1173 | RTFILE_O_READ | RTFILE_O_DENY_NONE | RTFILE_O_OPEN,
|
---|
| 1174 | NIL_RTVFS,
|
---|
| 1175 | NIL_RTVFSLOCK,
|
---|
| 1176 | &hVfsIos,
|
---|
| 1177 | (void **)&pIosData);
|
---|
| 1178 | if (RT_FAILURE(rc))
|
---|
| 1179 | return pThis->rcFatal = rc;
|
---|
| 1180 |
|
---|
| 1181 | pIosData->BaseObj.pPkzipReader = &pThis->PkzipReader;
|
---|
| 1182 | pIosData->BaseObj.ObjInfo = Info;
|
---|
| 1183 | pIosData->cbFile = Info.cbObject;
|
---|
| 1184 | pIosData->offFile = 0;
|
---|
| 1185 | pIosData->offComp = offData;
|
---|
| 1186 | pIosData->offCompStart = offData;
|
---|
| 1187 | pIosData->cbComp = cbCompressed;
|
---|
| 1188 | pIosData->enmCompMethod = enmCompMethod;
|
---|
| 1189 | pIosData->fPassZipType = true;
|
---|
| 1190 | pIosData->hVfsIos = pThis->hVfsIos;
|
---|
| 1191 | RTVfsIoStrmRetain(pThis->hVfsIos);
|
---|
| 1192 | pThis->pCurIosData = pIosData;
|
---|
| 1193 | enmType = RTVFSOBJTYPE_IO_STREAM;
|
---|
| 1194 | hVfsObj = RTVfsObjFromIoStream(hVfsIos);
|
---|
| 1195 | RTVfsIoStrmRelease(hVfsIos);
|
---|
| 1196 | break;
|
---|
| 1197 |
|
---|
| 1198 | case RTFS_TYPE_DIRECTORY:
|
---|
| 1199 | PRTZIPPKZIPBASEOBJ pBaseObjData;
|
---|
| 1200 | rc = RTVfsNewBaseObj(&g_rtZipPkzipFssBaseObjOps,
|
---|
| 1201 | sizeof(*pBaseObjData),
|
---|
| 1202 | NIL_RTVFS,
|
---|
| 1203 | NIL_RTVFSLOCK,
|
---|
| 1204 | &hVfsObj,
|
---|
| 1205 | (void **)&pBaseObjData);
|
---|
| 1206 | if (RT_FAILURE(rc))
|
---|
| 1207 | return pThis->rcFatal = rc;
|
---|
| 1208 |
|
---|
| 1209 | pBaseObjData->pPkzipReader = &pThis->PkzipReader;
|
---|
| 1210 | pBaseObjData->ObjInfo = Info;
|
---|
| 1211 | enmType = RTVFSOBJTYPE_BASE;
|
---|
| 1212 | break;
|
---|
| 1213 |
|
---|
| 1214 | default:
|
---|
| 1215 | return pThis->rcFatal = VERR_PKZIP_UNKNOWN_TYPE_FLAG;
|
---|
| 1216 | }
|
---|
[51712] | 1217 | pThis->hVfsCurObj = hVfsObj;
|
---|
[51696] | 1218 |
|
---|
| 1219 | if (ppszName)
|
---|
| 1220 | {
|
---|
| 1221 | rc = RTStrDupEx(ppszName, pThis->PkzipReader.szName);
|
---|
| 1222 | if (RT_FAILURE(rc))
|
---|
| 1223 | return pThis->rcFatal = rc;
|
---|
| 1224 | }
|
---|
| 1225 |
|
---|
| 1226 | if (phVfsObj)
|
---|
| 1227 | {
|
---|
| 1228 | RTVfsObjRetain(hVfsObj);
|
---|
| 1229 | *phVfsObj = hVfsObj;
|
---|
| 1230 | }
|
---|
| 1231 |
|
---|
| 1232 | if (penmType)
|
---|
| 1233 | *penmType = enmType;
|
---|
| 1234 |
|
---|
| 1235 | return VINF_SUCCESS;
|
---|
| 1236 | }
|
---|
| 1237 |
|
---|
| 1238 |
|
---|
| 1239 | /**
|
---|
| 1240 | * PKZip filesystem stream operations.
|
---|
| 1241 | */
|
---|
| 1242 | static const RTVFSFSSTREAMOPS rtZipPkzipFssOps =
|
---|
| 1243 | {
|
---|
| 1244 | { /* Obj */
|
---|
| 1245 | RTVFSOBJOPS_VERSION,
|
---|
| 1246 | RTVFSOBJTYPE_FS_STREAM,
|
---|
| 1247 | "PkzipFsStream",
|
---|
| 1248 | rtZipPkzipFss_Close,
|
---|
| 1249 | rtZipPkzipFss_QueryInfo,
|
---|
[94291] | 1250 | NULL,
|
---|
[51696] | 1251 | RTVFSOBJOPS_VERSION
|
---|
| 1252 | },
|
---|
| 1253 | RTVFSFSSTREAMOPS_VERSION,
|
---|
| 1254 | 0,
|
---|
| 1255 | rtZipPkzipFss_Next,
|
---|
[67116] | 1256 | NULL,
|
---|
[67123] | 1257 | NULL,
|
---|
[67149] | 1258 | NULL,
|
---|
[51696] | 1259 | RTVFSFSSTREAMOPS_VERSION
|
---|
| 1260 | };
|
---|
| 1261 |
|
---|
| 1262 |
|
---|
| 1263 | RTDECL(int) RTZipPkzipFsStreamFromIoStream(RTVFSIOSTREAM hVfsIosIn, uint32_t fFlags, PRTVFSFSSTREAM phVfsFss)
|
---|
| 1264 | {
|
---|
| 1265 | /*
|
---|
| 1266 | * Input validation.
|
---|
| 1267 | */
|
---|
| 1268 | AssertPtrReturn(phVfsFss, VERR_INVALID_HANDLE);
|
---|
| 1269 | *phVfsFss = NIL_RTVFSFSSTREAM;
|
---|
| 1270 | AssertPtrReturn(hVfsIosIn, VERR_INVALID_HANDLE);
|
---|
| 1271 | AssertReturn(!fFlags, VERR_INVALID_PARAMETER);
|
---|
| 1272 |
|
---|
| 1273 | uint32_t cRefs = RTVfsIoStrmRetain(hVfsIosIn);
|
---|
| 1274 | AssertReturn(cRefs != UINT32_MAX, VERR_INVALID_HANDLE);
|
---|
| 1275 |
|
---|
| 1276 | /*
|
---|
| 1277 | * Retain the input stream and create a new filesystem stream handle.
|
---|
| 1278 | */
|
---|
| 1279 | PRTZIPPKZIPFSSTREAM pThis;
|
---|
| 1280 | RTVFSFSSTREAM hVfsFss;
|
---|
[84192] | 1281 | int rc = RTVfsNewFsStream(&rtZipPkzipFssOps, sizeof(*pThis), NIL_RTVFS, NIL_RTVFSLOCK, RTFILE_O_READ,
|
---|
[67116] | 1282 | &hVfsFss, (void **)&pThis);
|
---|
[51696] | 1283 | if (RT_SUCCESS(rc))
|
---|
| 1284 | {
|
---|
| 1285 | pThis->hVfsIos = hVfsIosIn;
|
---|
| 1286 | pThis->hVfsCurObj = NIL_RTVFSOBJ;
|
---|
| 1287 | pThis->pCurIosData = NULL;
|
---|
| 1288 | pThis->fEndOfStream = false;
|
---|
| 1289 | pThis->rcFatal = VINF_SUCCESS;
|
---|
| 1290 | pThis->fHaveEocd = false;
|
---|
| 1291 |
|
---|
| 1292 | *phVfsFss = hVfsFss;
|
---|
| 1293 | return VINF_SUCCESS;
|
---|
| 1294 | }
|
---|
| 1295 |
|
---|
| 1296 | RTVfsIoStrmRelease(hVfsIosIn);
|
---|
| 1297 | return rc;
|
---|
| 1298 | }
|
---|