145 lines
3.7 KiB
C++
145 lines
3.7 KiB
C++
// natSystem.cc - Native code implementing System class.
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/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#include <platform.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java/lang/System.h>
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#include <java/lang/Class.h>
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#include <java/lang/ArrayStoreException.h>
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#include <java/lang/ArrayIndexOutOfBoundsException.h>
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#include <java/lang/NullPointerException.h>
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#include <java/io/PrintStream.h>
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#include <java/io/InputStream.h>
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void
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java::lang::System::setErr0 (java::io::PrintStream *newErr)
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{
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err = newErr;
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}
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void
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java::lang::System::setIn0 (java::io::InputStream *newIn)
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{
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in = newIn;
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}
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void
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java::lang::System::setOut0 (java::io::PrintStream *newOut)
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{
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out = newOut;
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}
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void
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java::lang::System::arraycopy (jobject src, jint src_offset,
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jobject dst, jint dst_offset,
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jint count)
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{
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if (! src || ! dst)
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throw new NullPointerException;
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jclass src_c = src->getClass();
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jclass dst_c = dst->getClass();
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jclass src_comp = src_c->getComponentType();
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jclass dst_comp = dst_c->getComponentType();
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if (! src_c->isArray() || ! dst_c->isArray()
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|| src_comp->isPrimitive() != dst_comp->isPrimitive()
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|| (src_comp->isPrimitive() && src_comp != dst_comp))
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throw new ArrayStoreException;
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__JArray *src_a = (__JArray *) src;
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__JArray *dst_a = (__JArray *) dst;
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if (src_offset < 0 || dst_offset < 0 || count < 0
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|| (unsigned jint) src_offset > (unsigned jint) src_a->length
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|| (unsigned jint) (src_offset + count) > (unsigned jint) src_a->length
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|| (unsigned jint) dst_offset > (unsigned jint) dst_a->length
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|| (unsigned jint) (dst_offset + count) > (unsigned jint) dst_a->length)
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throw new ArrayIndexOutOfBoundsException;
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// Do-nothing cases.
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if ((src == dst && src_offset == dst_offset)
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|| ! count)
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return;
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// If both are primitive, we can optimize trivially. If DST
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// components are always assignable from SRC components, then we
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// will never need to raise an error, and thus can do the
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// optimization. If source and destinations are the same, then we
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// know that the assignability premise always holds.
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const bool prim = src_comp->isPrimitive();
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if (prim || dst_comp->isAssignableFrom(src_comp) || src == dst)
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{
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const size_t size = (prim ? src_comp->size()
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: sizeof elements((jobjectArray)src)[0]);
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char *src_elts = _Jv_GetArrayElementFromElementType (src, src_comp);
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src_elts += size * src_offset;
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char *dst_elts = _Jv_GetArrayElementFromElementType (dst, dst_comp);
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dst_elts += size * dst_offset;
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#if HAVE_MEMMOVE
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// We don't bother trying memcpy. It can't be worth the cost of
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// the check.
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// Don't cast to (void*), as memmove may expect (char*)
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memmove (dst_elts, src_elts, count * size);
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#else
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bcopy (src_elts, dst_elts, count * size);
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#endif
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}
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else
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{
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jobject *src_elts = elements ((jobjectArray) src_a) + src_offset;
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jobject *dst_elts = elements ((jobjectArray) dst_a) + dst_offset;
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for (int i = 0; i < count; ++i)
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{
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if (*src_elts
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&& ! dst_comp->isAssignableFrom((*src_elts)->getClass()))
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throw new ArrayStoreException;
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*dst_elts++ = *src_elts++;
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}
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}
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}
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jlong
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java::lang::System::currentTimeMillis (void)
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{
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return _Jv_platform_gettimeofday ();
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}
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jint
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java::lang::System::identityHashCode (jobject obj)
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{
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return _Jv_HashCode (obj);
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}
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jboolean
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java::lang::System::isWordsBigEndian (void)
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{
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union
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{
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long lval;
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char cval;
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} u;
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u.lval = 1;
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return u.cval == 0;
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}
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