From e1bea0c0687c5f4551b3a6058ec37ce3705fa6cc Mon Sep 17 00:00:00 2001 From: Matthias Klose Date: Sun, 3 Jun 2007 23:18:43 +0000 Subject: libjava/classpath/ChangeLog.gcj: 2007-05-31 Matthias Klose * javax/management/NotificationBroadcasterSupport.java (getNotificationInfo): Add cast. * native/jni/qt-peer/Makefile.am (AM_CXXFLAGS): Add libstdc++ include directories. * native/jni/qt-peer/Makefile.in: Regenerate. libjava/ChangeLog: 2007-06-03 Matthias Klose * java/io/natFileWin32.cc (setFilePermissions): New (stub only). _access: Handle EXEC query, stub only. 2007-06-03 Matthias Klose Merged from classpath: * gnu/java/nio/SelectorProviderImpl.java: Whitespace merge. * java/lang/System.java(inheritedChannel): New. * java/lang/Character.java: Remove stray`;'. * java/net/MulticastSocket.java: Merged. * java/text/DateFormatSymbols.java(getInstance): New, comment updates. * java/text/Collator.java(getInstance): Merged. * java/util/Calendar.java: New attributes ALL_STYLES, SHORT, LONG. getDisplayName, getDisplayNames: New. * java/util/logging/Logger.java: Merged. * Regenerate .class and .h files. 2007-06-03 Matthias Klose * java/io/File.java: Merge with classpath-0.95, new method setFilePermissions, new attribute EXEC. * java/io/natFilePosix.cc (setFilePermissions): New. _access: Handle EXEC query. * classpath/lib/java/io/File.class, java/io/File.h: Regenerate. 2007-06-03 Matthias Klose Imported GNU Classpath 0.95. * classpath/Makefile.in, classpath/native/jni/midi-dssi/Makefile.in, classpath/native/jni/classpath/Makefile.in, classpath/native/jni/Makefile.in, classpath/native/jni/gconf-peer/Makefile.in, classpath/native/jni/java-io/Makefile.in, classpath/native/jni/native-lib/Makefile.in, classpath/native/jni/java-util/Makefile.in, classpath/native/jni/midi-alsa/Makefile.in, classpath/native/jni/java-lang/Makefile.in, classpath/native/jni/java-nio/Makefile.in, classpath/native/jni/java-net/Makefile.in, classpath/native/jni/xmlj/Makefile.in, classpath/native/jni/qt-peer/Makefile.in, classpath/native/jni/gtk-peer/Makefile.in, classpath/native/Makefile.in, classpath/native/jawt/Makefile.in, classpath/native/fdlibm/Makefile.in, classpath/native/plugin/Makefile.in, classpath/resource/Makefile.in, classpath/scripts/Makefile.in, classpath/tools/Makefile.in, classpath/doc/Makefile.in, classpath/doc/api/Makefile.in, classpath/lib/Makefile.in, classpath/external/Makefile.in, classpath/external/jsr166/Makefile.in, classpath/external/sax/Makefile.in, classpath/external/w3c_dom/Makefile.in, classpath/external/relaxngDatatype/Makefile.in, classpath/include/Makefile.in, classpath/examples/Makefile.in: Regenerate. * classpath/config.guess, classpath/config.sub, classpath/ltmain.sh : Update. * classpath/configure, classpath/depcomp, classpath/missing, classpath/aclocal.m4, classpath/install-sh: Regenerate. * gnu/classpath/Configuration.java (CLASSPATH_VERSION): Now 0.95. * sources.am: Regenerate. * Makefile.in: Regenerate. * Update the .class files and generated CNI header files, add new .class and generated CNI header files. * Remove generated files for removed java source files: classpath/gnu/java/net/BASE64.java, classpath/gnu/java/security/util/Base64.java, classpath/gnu/java/awt/peer/gtk/GThreadMutex.java, classpath/gnu/java/awt/peer/gtk/GThreadNativeMethodRunner.java, classpath/gnu/java/awt/font/autofit/Scaler.java, classpath/gnu/classpath/jdwp/util/Value.java, classpath/gnu/javax/net/ssl/Base64.java. * Remove empty directories. * Makefile.am(nat_source_files): Add natVMOperatingSystemMXBeanImpl.cc. * java/lang/Class.java(setAccessible): Merge from classpath. * java/util/Locale.java: Remove. * gnu/java/lang/management/VMOperatingSystemMXBeanImpl.java, gnu/java/lang/management/natVMOperatingSystemMXBeanImpl.cc: New. * gcj/javaprims.h: Update class declarations. * scripts/classes.pl: Update usage. * HACKING: Mention to build all peers. From-SVN: r125302 --- libjava/classpath/gnu/java/math/Fixed.java | 207 +++++++++++++++++++++++++++++ 1 file changed, 207 insertions(+) create mode 100644 libjava/classpath/gnu/java/math/Fixed.java (limited to 'libjava/classpath/gnu/java/math/Fixed.java') diff --git a/libjava/classpath/gnu/java/math/Fixed.java b/libjava/classpath/gnu/java/math/Fixed.java new file mode 100644 index 0000000..e0284c3 --- /dev/null +++ b/libjava/classpath/gnu/java/math/Fixed.java @@ -0,0 +1,207 @@ +/* Fixed.java -- Utility methods for fixed point arithmetics + 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.math; + +/** + * Utility methods for fixed point arithmetics. + */ +public final class Fixed +{ + + /** + * Private constructor to avoid instantiation. + */ + private Fixed() + { + // Forbidden constructor. + } + + /** + * Divides two fixed point values with n digits. + * + * @param n the number of digits + * @param a the first operand as fixed point value + * @param b the second operand as fixed point value + * + * @return a / b as fixed point value + */ + public static int div(int n, int a, int b) + { + return (int) ((((long) a) << n) / b); + } + + /** + * Multiplies two fixed point values with n digits. + * + * @param n the number of digits + * @param a the first operand as fixed point value + * @param b the second operand as fixed point value + * + * @return a * b as fixed point value + */ + public static int mul(int n, int a, int b) + { + return (int) ((((long) a) * b) >> n); + } + + /** + * Returns the ceiling value of a fixed point value a with + * the n digits. + * + * @param n the number of digits + * @param a the fixed point value + * + * @return ceil(a) as fixed point value + */ + public static int ceil(int n, int a) + { + return (a + (1 << n - 1)) & -(1 << n); + } + + /** + * Returns the floor value of a fixed point value a with + * n digits. + * + * @param n the number of digits + * @param a the fixed point value + * + * @return floor(a) as fixed point value + */ + public static int floor(int n, int a) + { + return a & -(1 << n); + } + + /** + * Returns the round value of a fixed point value a with + * the n digits. + * + * @param n the number of digits + * @param a the fixed point value + * + * @return round(a) as fixed point value + */ + public static int round(int n, int a) + { + return (a + (1 << (n - 1))) & -(1 << n); + } + + /** + * Returns the fixed point value a with n digits + * as float. + * + * @param n the number of digits + * @param a the fixed point value + * + * @return the float value of a + */ + public static float floatValue(int n, int a) + { + return ((float) a) / (1 << n); + } + + /** + * Returns the fixed point value a with n digits + * as double. + * + * @param n the number of digits + * @param a the fixed point value + * + * @return the double value of a + */ + public static double doubleValue(int n, int a) + { + return ((double) a) / (1 << n); + } + + /** + * Returns the fixed point value that corresponds to the specified float + * value a with n digits. + * + * @param n the number of digits + * @param a the float value + * + * @return the fixed point value + */ + public static int fixedValue(int n, float a) + { + return (int) (a * (1 << n)); + } + + /** + * Returns the fixed point value that corresponds to the specified double + * value a with n digits. + * + * @param n the number of digits + * @param a the double value + * + * @return the fixed point value + */ + public static int fixedValue(int n, double a) + { + return (int) (a * (1 << n)); + } + + /** + * Returns the integer value of the specified fixed point value + * a. This simply cuts of the digits (== floor(a)). + * + * @param n the number of digits + * @param a the fixed point value + * + * @return the integer value + */ + public static int intValue(int n, int a) + { + return a >> n; + } + + /** + * Returns a fixed point decimal as rounded integer value. + * + * @param n the number of digits + * @param a the fixed point number + * + * @return the fixed point decimal as rounded integer value + */ + public static int roundIntValue(int n, int a) + { + return (a + (1 << (n - 1))) >> n; + } +} -- cgit v1.1