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natSystem.cc (arraycopy): Don't always use jbyteArray; instead switch on actual element type.

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* java/lang/natSystem.cc (arraycopy): Don't always use jbyteArray;
	instead switch on actual element type.

From-SVN: r26405
This commit is contained in:
Tom Tromey 1999-04-13 12:16:41 +00:00 • committed by Tom Tromey
parent 3b5e5fb33f
commit b81194219b
2 changed files with 53 additions and 8 deletions
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58
libjava/java/lang/natSystem.cc
View file

@ -116,15 +116,57 @@ java::lang::System::arraycopy (jobject src, jint src_offset,
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];
const size_t size = (prim ? src_comp->size()
: sizeof elements((jobjectArray)src)[0]);
// In an ideal world we would do this via a virtual function in
// __JArray. However, we can't have virtual functions in
// __JArray due to the need to copy an array's virtual table in
// _Jv_FindArrayClass.
// We can't just pick a single subtype of __JArray to use due to
// alignment concerns.
char *src_elts = NULL;
if (! prim)
src_elts = (char *) elements ((jobjectArray) src);
else if (src_comp == JvPrimClass (byte))
src_elts = (char *) elements ((jbyteArray) src);
else if (src_comp == JvPrimClass (short))
src_elts = (char *) elements ((jshortArray) src);
else if (src_comp == JvPrimClass (int))
src_elts = (char *) elements ((jintArray) src);
else if (src_comp == JvPrimClass (long))
src_elts = (char *) elements ((jlongArray) src);
else if (src_comp == JvPrimClass (boolean))
src_elts = (char *) elements ((jbooleanArray) src);
else if (src_comp == JvPrimClass (char))
src_elts = (char *) elements ((jcharArray) src);
else if (src_comp == JvPrimClass (float))
src_elts = (char *) elements ((jfloatArray) src);
else if (src_comp == JvPrimClass (double))
src_elts = (char *) elements ((jdoubleArray) src);
src_elts += size * src_offset;
char *dst_elts = NULL;
if (! prim)
dst_elts = (char *) elements ((jobjectArray) dst);
else if (dst_comp == JvPrimClass (byte))
dst_elts = (char *) elements ((jbyteArray) dst);
else if (dst_comp == JvPrimClass (short))
dst_elts = (char *) elements ((jshortArray) dst);
else if (dst_comp == JvPrimClass (int))
dst_elts = (char *) elements ((jintArray) dst);
else if (dst_comp == JvPrimClass (long))
dst_elts = (char *) elements ((jlongArray) dst);
else if (dst_comp == JvPrimClass (boolean))
dst_elts = (char *) elements ((jbooleanArray) dst);
else if (dst_comp == JvPrimClass (char))
dst_elts = (char *) elements ((jcharArray) dst);
else if (dst_comp == JvPrimClass (float))
dst_elts = (char *) elements ((jfloatArray) dst);
else if (dst_comp == JvPrimClass (double))
dst_elts = (char *) elements ((jdoubleArray) dst);
dst_elts += size * dst_offset;
// We need a particular type to get the pointer to the data. So
// we choose bytes.
char *src_elts = (((char *) elements ((jbyteArray) src))
+ src_offset * size);
char *dst_elts = (((char *) elements ((jbyteArray) dst))
+ dst_offset * size);
// We don't bother trying memcpy. It can't be worth the cost of
// the check.
memmove ((void *) dst_elts, (void *) src_elts, count * size);