/***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2008 JRuby project
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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package org.jruby.ext.ffi;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import org.jruby.Ruby;
import org.jruby.RubyBignum;
import org.jruby.RubyHash;
import org.jruby.RubyInteger;
import org.jruby.RubyModule;
import org.jruby.RubyNumeric;
import org.jruby.RubyString;
import org.jruby.RubySymbol;
import org.jruby.javasupport.JavaObject;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.ByteList;
/**
*
*/
public final class Util {
private Util() {}
public static final byte int8Value(IRubyObject parameter) {
return (byte) longValue(parameter);
}
public static final short uint8Value(IRubyObject parameter) {
return (short) longValue(parameter);
}
public static final short int16Value(IRubyObject parameter) {
return (short) longValue(parameter);
}
public static final int uint16Value(IRubyObject parameter) {
return (int) longValue(parameter);
}
public static final int int32Value(IRubyObject parameter) {
return (int) longValue(parameter);
}
public static final long uint32Value(IRubyObject parameter) {
return longValue(parameter);
}
public static final long int64Value(IRubyObject parameter) {
return longValue(parameter);
}
public static final long uint64Value(IRubyObject parameter) {
final long value = parameter instanceof RubyBignum
? ((RubyBignum) parameter).getValue().longValue()
:longValue(parameter);
return value;
}
public static final float floatValue(IRubyObject parameter) {
return (float) RubyNumeric.num2dbl(parameter);
}
public static final double doubleValue(IRubyObject parameter) {
return RubyNumeric.num2dbl(parameter);
}
/**
* Converts characters like 'a' or 't' to an integer value
*
* @param parameter
* @return
*/
public static final long longValue(IRubyObject parameter) {
if (parameter instanceof RubyNumeric) {
return ((RubyNumeric) parameter).getLongValue();
} else if (parameter.isNil()) {
return 0L;
} else if (parameter instanceof RubyString) {
return longValue((RubyString) parameter);
}
throw parameter.getRuntime().newRangeError("Value "
+ parameter + " is not an integer");
}
private static final long longValue(RubyString parameter) {
CharSequence cs = parameter.asJavaString();
if (cs.length() == 1) {
return cs.charAt(0);
}
throw parameter.getRuntime().newRangeError("Value "
+ parameter + " is not an integer");
}
public static int intValue(IRubyObject obj, RubyHash enums) {
if (obj instanceof RubyInteger) {
return (int) ((RubyInteger) obj).getLongValue();
} else if (obj instanceof RubySymbol) {
IRubyObject value = enums.fastARef(obj);
if (value.isNil()) {
throw obj.getRuntime().newArgumentError("invalid enum value, " + obj.inspect());
}
return (int) longValue(value);
} else {
return (int) longValue(obj);
}
}
public static final IRubyObject newSigned8(Ruby runtime, byte value) {
return runtime.newFixnum(value);
}
public static final IRubyObject newUnsigned8(Ruby runtime, byte value) {
return runtime.newFixnum(value < 0 ? (long)((value & 0x7FL) + 0x80L) : value);
}
public static final IRubyObject newSigned16(Ruby runtime, short value) {
return runtime.newFixnum(value);
}
public static final IRubyObject newUnsigned16(Ruby runtime, short value) {
return runtime.newFixnum(value < 0 ? (long)((value & 0x7FFFL) + 0x8000L) : value);
}
public static final IRubyObject newSigned32(Ruby runtime, int value) {
return runtime.newFixnum(value);
}
public static final IRubyObject newUnsigned32(Ruby runtime, int value) {
return runtime.newFixnum(value < 0 ? (long)((value & 0x7FFFFFFFL) + 0x80000000L) : value);
}
public static final IRubyObject newSigned64(Ruby runtime, long value) {
return runtime.newFixnum(value);
}
private static final BigInteger UINT64_BASE = BigInteger.valueOf(Long.MAX_VALUE).add(BigInteger.ONE);
public static final IRubyObject newUnsigned64(Ruby runtime, long value) {
return value < 0
? RubyBignum.newBignum(runtime, BigInteger.valueOf(value & 0x7fffffffffffffffL).add(UINT64_BASE))
: runtime.newFixnum(value);
}
@Deprecated
public static final <T> T convertParameter(IRubyObject parameter, Class<T> paramClass) {
return paramClass.cast(parameter instanceof JavaObject
? ((JavaObject) parameter).getValue()
: parameter.toJava(paramClass));
}
public static final ByteBuffer slice(ByteBuffer buf, int offset) {
ByteBuffer tmp = buf.duplicate();
tmp.position((int) offset);
return tmp.slice();
}
public static final void checkBounds(Ruby runtime, long size, long off, long len) {
if ((off | len | (off + len) | (size - (off + len))) < 0) {
throw runtime.newIndexError("Memory access offset="
+ off + " size=" + len + " is out of bounds");
}
}
public static final Type findType(ThreadContext context, IRubyObject name) {
if (name instanceof Type) {
return (Type) name;
}
final RubyModule ffi = context.getRuntime().fastGetModule("FFI");
final IRubyObject typeDefs = ffi.fastFetchConstant("TypeDefs");
final IRubyObject type = ((RubyHash) typeDefs).fastARef(name);
return type instanceof Type ? (Type) type : (Type) ffi.callMethod(context, "find_type", name);
}
public static ByteOrder parseByteOrder(Ruby runtime, IRubyObject byte_order) {
if (byte_order instanceof RubySymbol || byte_order instanceof RubyString) {
String orderName = byte_order.asJavaString();
if ("network".equals(orderName) || "big".equals(orderName)) {
return ByteOrder.BIG_ENDIAN;
} else if ("little".equals(orderName)) {
return ByteOrder.LITTLE_ENDIAN;
} else {
return ByteOrder.nativeOrder();
}
} else {
throw runtime.newTypeError(byte_order, runtime.getSymbol());
}
}
}