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