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authordoko <doko@138bc75d-0d04-0410-961f-82ee72b054a4>2007-06-03 23:18:43 +0000
committerdoko <doko@138bc75d-0d04-0410-961f-82ee72b054a4>2007-06-03 23:18:43 +0000
commit5bf762459121cc397663d22498d62d71fa179ef6 (patch)
treea9c9e7d91c484d53fe154f9285fc57325572ce50 /libjava/classpath/gnu/java/math/Fixed.java
parent6d7301dc346a198a89ac987c1008aac09f191ee6 (diff)
downloadgcc-5bf762459121cc397663d22498d62d71fa179ef6.tar.gz
libjava/classpath/ChangeLog.gcj:
2007-05-31 Matthias Klose <doko@ubuntu.com> * 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 <doko@ubuntu.com> * java/io/natFileWin32.cc (setFilePermissions): New (stub only). _access: Handle EXEC query, stub only. 2007-06-03 Matthias Klose <doko@ubuntu.com> 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 <doko@ubuntu.com> * 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 <doko@ubuntu.com> 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. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@125302 138bc75d-0d04-0410-961f-82ee72b054a4
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+/* 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 <code>n</code> 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 <code>a / b</code> 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 <code>n</code> 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 <code>a * b</code> 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 <code>a</code> with
+ * the <code>n</code> digits.
+ *
+ * @param n the number of digits
+ * @param a the fixed point value
+ *
+ * @return <code>ceil(a)</code> 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 <code>a</code> with
+ * <code>n</code> digits.
+ *
+ * @param n the number of digits
+ * @param a the fixed point value
+ *
+ * @return <code>floor(a)</code> 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 <code>a</code> with
+ * the <code>n</code> digits.
+ *
+ * @param n the number of digits
+ * @param a the fixed point value
+ *
+ * @return <code>round(a)</code> as fixed point value
+ */
+ public static int round(int n, int a)
+ {
+ return (a + (1 << (n - 1))) & -(1 << n);
+ }
+
+ /**
+ * Returns the fixed point value <code>a</code> with <code>n</code> digits
+ * as float.
+ *
+ * @param n the number of digits
+ * @param a the fixed point value
+ *
+ * @return the float value of <code>a</code>
+ */
+ public static float floatValue(int n, int a)
+ {
+ return ((float) a) / (1 << n);
+ }
+
+ /**
+ * Returns the fixed point value <code>a</code> with <code>n</code> digits
+ * as double.
+ *
+ * @param n the number of digits
+ * @param a the fixed point value
+ *
+ * @return the double value of <code>a</code>
+ */
+ 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 <code>a</code> with <code>n</code> 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 <code>a</code> with <code>n</code> 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
+ * <code>a</code>. 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;
+ }
+}