1 /*
2 * Copyright (c) 2009, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nio.zipfs;
27
28 import java.io.IOException;
29 import java.io.OutputStream;
30 import java.time.DateTimeException;
31 import java.time.Instant;
32 import java.time.LocalDateTime;
33 import java.time.ZoneId;
34 import java.util.Arrays;
35 import java.util.Date;
36 import java.util.concurrent.TimeUnit;
37 import java.util.regex.PatternSyntaxException;
38
39 /**
40 * @author Xueming Shen
41 */
42 class ZipUtils {
43
44 /*
45 * Writes a 16-bit short to the output stream in little-endian byte order.
46 */
47 public static void writeShort(OutputStream os, int v) throws IOException {
48 os.write(v & 0xff);
49 os.write((v >>> 8) & 0xff);
50 }
51
52 /*
53 * Writes a 32-bit int to the output stream in little-endian byte order.
54 */
55 public static void writeInt(OutputStream os, long v) throws IOException {
56 os.write((int)(v & 0xff));
57 os.write((int)((v >>> 8) & 0xff));
58 os.write((int)((v >>> 16) & 0xff));
59 os.write((int)((v >>> 24) & 0xff));
60 }
61
62 /*
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1 /*
2 * Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nio.zipfs;
27
28 import java.io.IOException;
29 import java.io.OutputStream;
30 import java.nio.file.attribute.PosixFilePermission;
31 import java.time.DateTimeException;
32 import java.time.Instant;
33 import java.time.LocalDateTime;
34 import java.time.ZoneId;
35 import java.util.Arrays;
36 import java.util.Date;
37 import java.util.Set;
38 import java.util.concurrent.TimeUnit;
39 import java.util.regex.PatternSyntaxException;
40
41 /**
42 * @author Xueming Shen
43 */
44 class ZipUtils {
45
46 /**
47 * The value indicating unix file attributes in CEN field "version made by".
48 */
49 static final int FILE_ATTRIBUTES_UNIX = 3;
50
51 /**
52 * Constant used to calculate "version made by".
53 */
54 static final int VERSION_BASE_UNIX = FILE_ATTRIBUTES_UNIX << 8;
55
56 /**
57 * The bit flag used to specify read permission by the owner.
58 */
59 static final int POSIX_USER_READ = 0400;
60
61 /**
62 * The bit flag used to specify write permission by the owner.
63 */
64 static final int POSIX_USER_WRITE = 0200;
65
66 /**
67 * The bit flag used to specify execute permission by the owner.
68 */
69 static final int POSIX_USER_EXECUTE = 0100;
70
71 /**
72 * The bit flag used to specify read permission by the group.
73 */
74 static final int POSIX_GROUP_READ = 040;
75
76 /**
77 * The bit flag used to specify write permission by the group.
78 */
79 static final int POSIX_GROUP_WRITE = 020;
80
81 /**
82 * The bit flag used to specify execute permission by the group.
83 */
84 static final int POSIX_GROUP_EXECUTE = 010;
85
86 /**
87 * The bit flag used to specify read permission by others.
88 */
89 static final int POSIX_OTHER_READ = 04;
90
91 /**
92 * The bit flag used to specify write permission by others.
93 */
94 static final int POSIX_OTHER_WRITE = 02;
95
96 /**
97 * The bit flag used to specify execute permission by others.
98 */
99 static final int POSIX_OTHER_EXECUTE = 01;
100
101 /**
102 * Convert a {@link PosixFilePermission} object into the appropriate bit
103 * flag.
104 *
105 * @param perm The {@link PosixFilePermission} object.
106 * @return The bit flag as int.
107 */
108 static int permToFlag(PosixFilePermission perm) {
109 switch(perm) {
110 case OWNER_READ:
111 return POSIX_USER_READ;
112 case OWNER_WRITE:
113 return POSIX_USER_WRITE;
114 case OWNER_EXECUTE:
115 return POSIX_USER_EXECUTE;
116 case GROUP_READ:
117 return POSIX_GROUP_READ;
118 case GROUP_WRITE:
119 return POSIX_GROUP_WRITE;
120 case GROUP_EXECUTE:
121 return POSIX_GROUP_EXECUTE;
122 case OTHERS_READ:
123 return POSIX_OTHER_READ;
124 case OTHERS_WRITE:
125 return POSIX_OTHER_WRITE;
126 case OTHERS_EXECUTE:
127 return POSIX_OTHER_EXECUTE;
128 default:
129 return 0;
130 }
131 }
132
133 /**
134 * Converts a set of {@link PosixFilePermission}s into an int value where
135 * the according bits are set.
136 *
137 * @param perms A Set of {@link PosixFilePermission} objects.
138 *
139 * @return A bit mask representing the input Set.
140 */
141 static int permsToFlags(Set<PosixFilePermission> perms) {
142 if (perms == null) {
143 return -1;
144 }
145 int flags = 0;
146 for (PosixFilePermission perm : perms) {
147 flags |= permToFlag(perm);
148 }
149 return flags;
150 }
151
152 /*
153 * Writes a 16-bit short to the output stream in little-endian byte order.
154 */
155 public static void writeShort(OutputStream os, int v) throws IOException {
156 os.write(v & 0xff);
157 os.write((v >>> 8) & 0xff);
158 }
159
160 /*
161 * Writes a 32-bit int to the output stream in little-endian byte order.
162 */
163 public static void writeInt(OutputStream os, long v) throws IOException {
164 os.write((int)(v & 0xff));
165 os.write((int)((v >>> 8) & 0xff));
166 os.write((int)((v >>> 16) & 0xff));
167 os.write((int)((v >>> 24) & 0xff));
168 }
169
170 /*
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