diff options
Diffstat (limited to 'libjava/classpath/gnu/java/io')
| -rw-r--r-- | libjava/classpath/gnu/java/io/ASN1ParsingException.java | 56 | ||||
| -rw-r--r-- | libjava/classpath/gnu/java/io/Base64InputStream.java | 220 | ||||
| -rw-r--r-- | libjava/classpath/gnu/java/io/ClassLoaderObjectInputStream.java | 73 | ||||
| -rw-r--r-- | libjava/classpath/gnu/java/io/NullOutputStream.java | 56 | ||||
| -rw-r--r-- | libjava/classpath/gnu/java/io/ObjectIdentityMap2Int.java | 292 | ||||
| -rw-r--r-- | libjava/classpath/gnu/java/io/ObjectIdentityWrapper.java | 100 | ||||
| -rw-r--r-- | libjava/classpath/gnu/java/io/PlatformHelper.java | 129 | ||||
| -rw-r--r-- | libjava/classpath/gnu/java/io/package.html | 46 |
8 files changed, 972 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/io/ASN1ParsingException.java b/libjava/classpath/gnu/java/io/ASN1ParsingException.java new file mode 100644 index 000000000..9cf98abd3 --- /dev/null +++ b/libjava/classpath/gnu/java/io/ASN1ParsingException.java @@ -0,0 +1,56 @@ +/* ASN1ParsingException.java -- ASN.1 parsing exception. + Copyright (C) 2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.io; + +/** + * Signals a malformed ASN.1 sequence. + */ +public class ASN1ParsingException extends java.io.IOException +{ + + public ASN1ParsingException() + { + super(); + } + + public ASN1ParsingException(String msg) + { + super(msg); + } +} diff --git a/libjava/classpath/gnu/java/io/Base64InputStream.java b/libjava/classpath/gnu/java/io/Base64InputStream.java new file mode 100644 index 000000000..1105b6022 --- /dev/null +++ b/libjava/classpath/gnu/java/io/Base64InputStream.java @@ -0,0 +1,220 @@ +/* Base64InputStream.java -- base-64 input stream. + Copyright (C) 2003, 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.io; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.FilterInputStream; +import java.io.IOException; +import java.io.InputStream; + +/** + * A filter input stream that decodes data encoded in the Base-64 + * encoding scheme. + * + * @author Casey Marshall (rsdio@metastatic.org) + */ +public class Base64InputStream extends FilterInputStream +{ + + // Constants and fields. + // ------------------------------------------------------------------------ + + /** Base-64 digits. */ + private static final String BASE_64 = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + + /** Base-64 padding character. */ + private static final char BASE_64_PAD = '='; + + /** Decoding state. */ + private int state; + + /** Intermediate decoded value. */ + private int temp; + + /** EOF flag. */ + private boolean eof; + + private final byte[] one = new byte[1]; + + // Constructors. + // ------------------------------------------------------------------------ + + /** + * Create a new Base-64 input stream. The input bytes must be the + * ASCII characters A-Z, a-z, 0-9, + and /, with optional whitespace, + * and will be decoded into a byte stream. + * + * @param in The source of Base-64 input. + */ + public Base64InputStream(InputStream in) + { + super(in); + state = 0; + temp = 0; + eof = false; + } + + // Class method. + // ------------------------------------------------------------------------ + + /** + * Decode a single Base-64 string to a byte array. + * + * @param base64 The Base-64 encoded data. + * @return The decoded bytes. + * @throws IOException If the given data do not compose a valid Base-64 + * sequence. + */ + public static byte[] decode(String base64) throws IOException + { + Base64InputStream in = + new Base64InputStream(new ByteArrayInputStream(base64.getBytes())); + ByteArrayOutputStream out = + new ByteArrayOutputStream((int) (base64.length() / 0.666)); + byte[] buf = new byte[1024]; + int len; + while ((len = in.read(buf)) != -1) + out.write(buf, 0, len); + return out.toByteArray(); + } + + // Instance methods. + // ------------------------------------------------------------------------ + + public int available() + { + return 0; + } + + public int read() throws IOException + { + if (read(one) == 1) + return one[0]; + return -1; + } + + public int read(byte[] buf, int off, int len) throws IOException + { + if (eof) + return -1; + int count = 0; + while (count < len) + { + int i; + while (Character.isWhitespace((char) (i = in.read()))) + ; + + int pos = BASE_64.indexOf((char) i); + if (pos >= 0) + { + switch (state) + { + case 0: + temp = pos << 2; + state = 1; + break; + case 1: + buf[count++] = (byte) (temp | (pos >>> 4)); + temp = (pos & 0x0F) << 4; + state = 2; + break; + case 2: + buf[count++] = (byte) (temp | (pos >>> 2)); + temp = (pos & 0x03) << 6; + state = 3; + break; + case 3: + buf[count++] = (byte) (temp | pos); + state = 0; + break; + } + } + else if (i == BASE_64_PAD) + { + switch (state) + { + case 0: + case 1: + throw new IOException("malformed Base-64 input"); + case 2: + while (Character.isWhitespace((char) (i = in.read()))) + ; + if (i != BASE_64_PAD) + throw new IOException("malformed Base-64 input"); + case 3: + while (Character.isWhitespace((char) (i = in.read()))) + ; + } + eof = true; + break; + } + else // First non-Base-64 character, consider it end-of-stream. + { + if (state != 0) + throw new IOException("malformed Base-64 input"); + eof = true; + break; + } + } + return count; + } + + public boolean markSupported() + { + return false; + } + + public void mark(int markLimit) { } + + public void reset() throws IOException + { + throw new IOException("reset not supported"); + } + + public long skip(long n) throws IOException + { + long skipped; + for (skipped = 0; skipped < n; skipped++) + if (read() == -1) + break; + return skipped; + } +} diff --git a/libjava/classpath/gnu/java/io/ClassLoaderObjectInputStream.java b/libjava/classpath/gnu/java/io/ClassLoaderObjectInputStream.java new file mode 100644 index 000000000..e3f3d4c42 --- /dev/null +++ b/libjava/classpath/gnu/java/io/ClassLoaderObjectInputStream.java @@ -0,0 +1,73 @@ +/* gnu.java.io.ClassLoaderObjectInputStream + Copyright (C) 1998 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.io; + +import java.io.IOException; +import java.io.InputStream; +import java.io.ObjectInputStream; +import java.io.StreamCorruptedException; + +/** + * ClassLoaderObjectInputStream is ObjectInputStream, with + * the ability to use a specific ClassLoader. + * + * @author Geoff Berry + * @version 1.1.0, 29 Jul 1998 + */ + +public class ClassLoaderObjectInputStream extends ObjectInputStream { + ClassLoader myClassLoader; + + /** Create the new ClassLoaderObjectInputStream. + * @param in the InputStream to read the Objects from. + * @param myClassLoader the ClassLoader to load classes + * with. + */ + public ClassLoaderObjectInputStream(InputStream in, ClassLoader myClassLoader) throws IOException,StreamCorruptedException { + super(in); + this.myClassLoader = myClassLoader; + } + + /** Overriden method to use the loadClass() method from + * the ClassLoader. + */ + public Class resolveClass(String name) throws IOException, ClassNotFoundException { + return myClassLoader.loadClass(name); + } +} diff --git a/libjava/classpath/gnu/java/io/NullOutputStream.java b/libjava/classpath/gnu/java/io/NullOutputStream.java new file mode 100644 index 000000000..603a2d3dd --- /dev/null +++ b/libjava/classpath/gnu/java/io/NullOutputStream.java @@ -0,0 +1,56 @@ +/* NullOutputStream.java -- OutputStream that does absolutely nothing + Copyright (C) 1998 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.io; + +import java.io.OutputStream; + +/** + This is a placeholder OutputStream that does absolutley nothing + when written to. It is intended to be used in the same manner as + /dev/null. None of this class's methods do anything at all. +*/ +public class NullOutputStream extends OutputStream +{ + public NullOutputStream() {} + public void write( int b ) {} + public void write( byte b[] ) {} + public void write( byte b[], int off, int len ) {} + public void flush() {} + public void close() {} +} diff --git a/libjava/classpath/gnu/java/io/ObjectIdentityMap2Int.java b/libjava/classpath/gnu/java/io/ObjectIdentityMap2Int.java new file mode 100644 index 000000000..ed62e8381 --- /dev/null +++ b/libjava/classpath/gnu/java/io/ObjectIdentityMap2Int.java @@ -0,0 +1,292 @@ +/* ObjectIdentityMapToInt.java -- Helper class for faster serialization + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.io; + +/** + * This class provides a map from Object to non-negative int values. + * Objects are considered equal only if their references are equal. + * + * This can be used to equip objects with an integer id. This class + * is implemented to use as little memory as possible, particularly + * not to create hashtable buckets and Integer instances for each + * mapping. + * + * @author Fridtjof Siebert (siebert@aicas.com) + */ +public class ObjectIdentityMap2Int +{ + + + /** + * Prime numbers used as size of array. We need the size to be a + * prime number since the delta used for conflict resulution must + * not have any common divisors with the length. + */ + private static final int[] PRIMES = { + 0x1f, + 0x3d, + 0x7f, + 0xfb, + 0x1fd, + 0x3fd, + 0x7f7, + 0xffd, + 0x1fff, + 0x3ffd, + 0x7fed, + 0xfff1, + 0x1ffff, + 0x3fffb, + 0x7ffff, + 0xffffd, + 0x1ffff7, + 0x3ffffd, + 0x7ffff1, + 0xfffffd, + 0x1ffffd9, + 0x3fffffb, + 0x7ffffd9, + 0xfffffc7, + 0x1ffffffd, + 0x3fffffdd, + 0x7fffffff}; + + + /** + * Object to be used instead of "null" + */ + private static final Object NIL = new Object(); + + + /** + * The objects in this map: + * + * invariant + * objectTable.size == PRIMES[cap] + */ + private Object[] objectTable; + + + /** + * The corresponding integer ids. + * + * invariant + * intTable.size == PRIMES[cap] + */ + private int[] intTable; + + + /** + * The number of entries in this map. + * + * invariant + * size < limit + */ + private int size = 0; + + + /** + * The index in primes of the size of the tables. + */ + private int cap = 0; + + + /** + * The limit for size at which the table size is increased. + * + * invariant + * limit = PRIMES[cap] / 4 * 3; + */ + private int limit = 0; + + + /** + * Constructs an empty <code>ObjectIdentityMap2Int</code>. + */ + public ObjectIdentityMap2Int() + { + alloc(0); + } + + + /** + * Helper function to alloc the object and int array for the given + * capacity. Set limit, reset size to 0. + * + * No elements will be stored in the newly allocated arrays. + * + * @param c the capacity: this is an index in PRIMES, PRIMES[c] + * gives the size of the arrays. + * + * @throws InternalError if c >= PRIMES.length (in this case, a + * normal Hashtable would throw an OutOfMemoryError or a + * NegativeArraySizeException since the array size exceeds the range + * of positive integers). + */ + private void alloc(int c) + { + if (c >= PRIMES.length) + throw new InternalError("Hash table size overflow"); + + cap = c; + int len = PRIMES[c]; + objectTable = new Object[len]; + intTable = new int[len]; + limit = len / 4 * 3; + + size = 0; + } + + + /** + * Add a mapping to this Map. + * + * ensures + * (get(o) == i); + * + * @param o object reference or null that is to be mapped. + * + * @param i the integer id to be associated with o + * + * @throws IllegalArgumentException if i<0 + * + * @throws InternalError if hash tables has grown to more then + * 0x7fffffff entries (ie., size >= 0x7fffffff*3/4). + */ + public void put(Object o, int i) + { + if (i < 0) + throw new IllegalArgumentException("int argument must be postive: "+i); + + o = (o == null) ? NIL : o; + int s = slot(o); + Object[] ot = objectTable; + intTable[s] = i; + if (objectTable[s] == null) + { + objectTable[s] = o; + size++; + if (size >= limit) + { + rehash(); + } + } + } + + + /** + * Helper function to find the index of a free or existing slot for + * object o + * + * ensure + * ((objectTable[result] != null) IMPLIES (objectTable[result] == o)); + * + * @param o an object, must not be null. + * + * @return an index of o + */ + private int slot(Object o) + { + Object[] ot = objectTable; + int hc = System.identityHashCode(o); + int len = ot.length; + int result = hc % len; + result = result < 0 ? -result : result; + int delta = 16 - (hc & 15); + Object existing = ot[result]; + while ((existing != null) && (existing != o)) + { + result += delta; + if (result >= len) + result -= len; + existing = ot[result]; + } + return result; + } + + + /** + * Helper function for put() to increaes the capacity of this table + * to the next size (approx. double the size). Keep the mapping and + * the size unchanged. + * + * ensure + * (cap == \old cap+1); + */ + private void rehash() + { + Object[] ot = objectTable; + int [] it = intTable; + alloc(cap + 1); + + for (int i = 0; i < ot.length; i++) + put(ot[i], it[i]); + } + + + /** + * Obtain an element from this map + * + * @param o an object or null + * + * @return the corresponding integer id for o or -1 if o has not + * been put into this map. + */ + public int get(Object o) + { + o = (o == null) ? NIL : o; + int s = slot(o); + return objectTable[s] == null ? -1 : intTable[s]; + } + + /** + * Clear this map + * + * ensures + * ((size == 0) && \forall Object o: get(o) == -1) + */ + public void clear() + { + Object[] ot = objectTable; + size = 0; + for (int i = 0; i < ot.length; i++) + ot[i] = null; + } + +} diff --git a/libjava/classpath/gnu/java/io/ObjectIdentityWrapper.java b/libjava/classpath/gnu/java/io/ObjectIdentityWrapper.java new file mode 100644 index 000000000..53c9943de --- /dev/null +++ b/libjava/classpath/gnu/java/io/ObjectIdentityWrapper.java @@ -0,0 +1,100 @@ +/* ObjectIdentityWrapper.java -- Wrapper class used to override equals() + and hashCode() to be as discriminating as possible + Copyright (C) 1998 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.io; + +/** + This class is a thin wrapper around <code>Object</code> that makes + the methods <code>hashCode()</code> and <code>equals(Object)</code> + as discriminating as possible. +*/ +public class ObjectIdentityWrapper +{ + + /** + Constructs a <code>ObjectIdentityWrapper</code> that is wrapped + around o. + */ + public ObjectIdentityWrapper( Object o ) + { + object = o; + } + + /** + Uses <code>System.identityHashCode(Object)</code> to compute a + hash code for the object wrapped by this + <code>ObjectIdentityWrapper</code>. + + @see java.lang.System#identityHashCode(java.lang.Object) + @see java.util.Hashtable + @see java.lang.Object#hashCode() + */ + public int hashCode() + { + return System.identityHashCode( object ); + } + + /** + Uses the <code>==</code> operator to test for equality between + the object wrapped by this <code>ObjectIdentityWrapper</code> and + the object wrapped by the <code>ObjectIdentityWrapper</code> o. + Returns false if o is not a <code>ObjectIdentityWrapper</code>. + + @see java.util.Hashtable + @see java.lang.Object#equals() + */ + public boolean equals( Object o ) + { + if( o instanceof ObjectIdentityWrapper ) + return object == ((ObjectIdentityWrapper)o).object; + else + return false; + } + + public String toString() + { + return "ObjectIdentityWrapper< " + object + ", " + hashCode() + " >"; + } + + /** + The <code>Object</code> wrapped by this + <code>ObjectIdentityWrapper</code>. + */ + public Object object; +} diff --git a/libjava/classpath/gnu/java/io/PlatformHelper.java b/libjava/classpath/gnu/java/io/PlatformHelper.java new file mode 100644 index 000000000..545241110 --- /dev/null +++ b/libjava/classpath/gnu/java/io/PlatformHelper.java @@ -0,0 +1,129 @@ +/* PlatformHelper.java -- Isolate OS-specific IO helper methods and variables + Copyright (C) 1998, 2002, 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.io; + +/** + * We had many changes in File.java, URLStreamHandler.java etc. to handle + * path representations on different platforms (Windows/Unix-family). + * Finally we'd like to collect all these ad hoc codes into this utility class. + * --Gansha + */ +public class PlatformHelper +{ + public static final boolean isWindows = System.getProperty("os.name").indexOf("Windows") >= 0; + public static final String separator = System.getProperty("file.separator"); + public static final char separatorChar = separator.charAt(0); + public static final String pathSeparator = System.getProperty("path.separator"); + public static final char pathSeparatorChar = pathSeparator.charAt(0); + + /** + * On most platforms 260 is equal or greater than a max path value, + * so we can set the initial buffer size of StringBuffer to half of this value + * to improve performance. + */ + public static final int INITIAL_MAX_PATH = 260/2; + + /** + * This routine checks the input param "path" whether it begins with root path + * prefix. + * if not, return 0; + * if yes, return the len of root path prefix; + * --for Unix-family platform, root path begins with "/" and len is 1 + * --for Windows platform, root path begins with "drive:\\" and len is 3 + */ + public static final int beginWithRootPathPrefix(String path) + { + if (path.startsWith("/") || path.startsWith("\\")) + return 1; + + if (!isWindows) + return 0; + + if (path.length() > 2 + && Character.isLetter(path.charAt(0)) + && path.charAt(1) == ':' + && (path.charAt(2) == '/' || path.charAt(2) == '\\')) + return 3; + + return 0; + } + + /** + * This routine checks the input param "path" whether it's root directory. + * --for Unix-family platform, root directory is "/" + * --for Windows platform, root directory is "\\" or "drive:\\". + */ + public static final boolean isRootDirectory(String path) + { + int len = path.length(); + return len > 0 && beginWithRootPathPrefix(path) == len; + } + + /** + * This routine checks whether input param "path" ends with separator + */ + public static final boolean endWithSeparator(String path) + { + if (path.endsWith("\\") || path.endsWith("/")) + return true; + + return false; + } + + /** + * This routine removes from input param "path" the tail separator if it exists, + * and return the remain part. + */ + public static final String removeTailSeparator(String path) + { + if (endWithSeparator(path) && !isRootDirectory(path)) + return path.substring(0, path.length() - 1); + + return path; + } + + /** + * This routine returns last index of separator in input param "path", + * and return it. + */ + public static final int lastIndexOfSeparator(String path) + { + return Math.max(path.lastIndexOf("/"), path.lastIndexOf("\\")); + } + +} diff --git a/libjava/classpath/gnu/java/io/package.html b/libjava/classpath/gnu/java/io/package.html new file mode 100644 index 000000000..74da8277f --- /dev/null +++ b/libjava/classpath/gnu/java/io/package.html @@ -0,0 +1,46 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> +<!-- package.html - describes classes in gnu.java.io package. + Copyright (C) 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. --> + +<html> +<head><title>GNU Classpath - gnu.java.io</title></head> + +<body> +<p></p> + +</body> +</html> |