| /* |
| * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.nio.fs; |
| |
| import java.nio.file.Path; |
| import java.io.File; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.Arrays; |
| |
| /** |
| * Unix specific Path <--> URI conversion |
| */ |
| |
| class UnixUriUtils { |
| private UnixUriUtils() { } |
| |
| /** |
| * Converts URI to Path |
| */ |
| static Path fromUri(UnixFileSystem fs, URI uri) { |
| if (!uri.isAbsolute()) |
| throw new IllegalArgumentException("URI is not absolute"); |
| if (uri.isOpaque()) |
| throw new IllegalArgumentException("URI is not hierarchical"); |
| String scheme = uri.getScheme(); |
| if ((scheme == null) || !scheme.equalsIgnoreCase("file")) |
| throw new IllegalArgumentException("URI scheme is not \"file\""); |
| if (uri.getRawAuthority() != null) |
| throw new IllegalArgumentException("URI has an authority component"); |
| if (uri.getRawFragment() != null) |
| throw new IllegalArgumentException("URI has a fragment component"); |
| if (uri.getRawQuery() != null) |
| throw new IllegalArgumentException("URI has a query component"); |
| |
| // compatibility with java.io.File |
| if (!uri.toString().startsWith("file:///")) |
| return new File(uri).toPath(); |
| |
| // transformation use raw path |
| String p = uri.getRawPath(); |
| int len = p.length(); |
| if (len == 0) |
| throw new IllegalArgumentException("URI path component is empty"); |
| |
| // transform escaped octets and unescaped characters to bytes |
| if (p.endsWith("/") && len > 1) |
| len--; |
| byte[] result = new byte[len]; |
| int rlen = 0; |
| int pos = 0; |
| while (pos < len) { |
| char c = p.charAt(pos++); |
| byte b; |
| if (c == '%') { |
| assert (pos+2) <= len; |
| char c1 = p.charAt(pos++); |
| char c2 = p.charAt(pos++); |
| b = (byte)((decode(c1) << 4) | decode(c2)); |
| if (b == 0) |
| throw new IllegalArgumentException("Nul character not allowed"); |
| } else { |
| assert c < 0x80; |
| b = (byte)c; |
| } |
| result[rlen++] = b; |
| } |
| if (rlen != result.length) |
| result = Arrays.copyOf(result, rlen); |
| |
| return new UnixPath(fs, result); |
| } |
| |
| /** |
| * Converts Path to URI |
| */ |
| static URI toUri(UnixPath up) { |
| byte[] path = up.toAbsolutePath().asByteArray(); |
| StringBuilder sb = new StringBuilder("file:///"); |
| assert path[0] == '/'; |
| for (int i=1; i<path.length; i++) { |
| char c = (char)(path[i] & 0xff); |
| if (match(c, L_PATH, H_PATH)) { |
| sb.append(c); |
| } else { |
| sb.append('%'); |
| sb.append(hexDigits[(c >> 4) & 0x0f]); |
| sb.append(hexDigits[(c) & 0x0f]); |
| } |
| } |
| |
| // trailing slash if directory |
| if (sb.charAt(sb.length()-1) != '/') { |
| int mode = UnixNativeDispatcher.stat(up); |
| if ((mode & UnixConstants.S_IFMT) == UnixConstants.S_IFDIR) |
| sb.append('/'); |
| } |
| |
| try { |
| return new URI(sb.toString()); |
| } catch (URISyntaxException x) { |
| throw new AssertionError(x); // should not happen |
| } |
| } |
| |
| // The following is copied from java.net.URI |
| |
| // Compute the low-order mask for the characters in the given string |
| private static long lowMask(String chars) { |
| int n = chars.length(); |
| long m = 0; |
| for (int i = 0; i < n; i++) { |
| char c = chars.charAt(i); |
| if (c < 64) |
| m |= (1L << c); |
| } |
| return m; |
| } |
| |
| // Compute the high-order mask for the characters in the given string |
| private static long highMask(String chars) { |
| int n = chars.length(); |
| long m = 0; |
| for (int i = 0; i < n; i++) { |
| char c = chars.charAt(i); |
| if ((c >= 64) && (c < 128)) |
| m |= (1L << (c - 64)); |
| } |
| return m; |
| } |
| |
| // Compute a low-order mask for the characters |
| // between first and last, inclusive |
| private static long lowMask(char first, char last) { |
| long m = 0; |
| int f = Math.max(Math.min(first, 63), 0); |
| int l = Math.max(Math.min(last, 63), 0); |
| for (int i = f; i <= l; i++) |
| m |= 1L << i; |
| return m; |
| } |
| |
| // Compute a high-order mask for the characters |
| // between first and last, inclusive |
| private static long highMask(char first, char last) { |
| long m = 0; |
| int f = Math.max(Math.min(first, 127), 64) - 64; |
| int l = Math.max(Math.min(last, 127), 64) - 64; |
| for (int i = f; i <= l; i++) |
| m |= 1L << i; |
| return m; |
| } |
| |
| // Tell whether the given character is permitted by the given mask pair |
| private static boolean match(char c, long lowMask, long highMask) { |
| if (c < 64) |
| return ((1L << c) & lowMask) != 0; |
| if (c < 128) |
| return ((1L << (c - 64)) & highMask) != 0; |
| return false; |
| } |
| |
| // decode |
| private static int decode(char c) { |
| if ((c >= '0') && (c <= '9')) |
| return c - '0'; |
| if ((c >= 'a') && (c <= 'f')) |
| return c - 'a' + 10; |
| if ((c >= 'A') && (c <= 'F')) |
| return c - 'A' + 10; |
| throw new AssertionError(); |
| } |
| |
| // digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | |
| // "8" | "9" |
| private static final long L_DIGIT = lowMask('0', '9'); |
| private static final long H_DIGIT = 0L; |
| |
| // upalpha = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | |
| // "J" | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | |
| // "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z" |
| private static final long L_UPALPHA = 0L; |
| private static final long H_UPALPHA = highMask('A', 'Z'); |
| |
| // lowalpha = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | |
| // "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | |
| // "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z" |
| private static final long L_LOWALPHA = 0L; |
| private static final long H_LOWALPHA = highMask('a', 'z'); |
| |
| // alpha = lowalpha | upalpha |
| private static final long L_ALPHA = L_LOWALPHA | L_UPALPHA; |
| private static final long H_ALPHA = H_LOWALPHA | H_UPALPHA; |
| |
| // alphanum = alpha | digit |
| private static final long L_ALPHANUM = L_DIGIT | L_ALPHA; |
| private static final long H_ALPHANUM = H_DIGIT | H_ALPHA; |
| |
| // mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | |
| // "(" | ")" |
| private static final long L_MARK = lowMask("-_.!~*'()"); |
| private static final long H_MARK = highMask("-_.!~*'()"); |
| |
| // unreserved = alphanum | mark |
| private static final long L_UNRESERVED = L_ALPHANUM | L_MARK; |
| private static final long H_UNRESERVED = H_ALPHANUM | H_MARK; |
| |
| // pchar = unreserved | escaped | |
| // ":" | "@" | "&" | "=" | "+" | "$" | "," |
| private static final long L_PCHAR |
| = L_UNRESERVED | lowMask(":@&=+$,"); |
| private static final long H_PCHAR |
| = H_UNRESERVED | highMask(":@&=+$,"); |
| |
| // All valid path characters |
| private static final long L_PATH = L_PCHAR | lowMask(";/"); |
| private static final long H_PATH = H_PCHAR | highMask(";/"); |
| |
| private static final char[] hexDigits = { |
| '0', '1', '2', '3', '4', '5', '6', '7', |
| '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' |
| }; |
| } |