Patch: FYI: new JNI test

[Tom Tromey <tromey at redhat dot com>]

I'm checking this in.

This adds a new JNI test written in C++.  This lets us test that our
<jni.h> is suitable for use from C++.  Right now it isn't; see PR 5103.
(I have a patch for jni.h, too, but I'm still testing it.)

Tom

Index: ChangeLog
from  Tom Tromey  <tromey@redhat.com>

	For PR libgcj/5103:
	* libjava.jni/cxxtest.out: New file.
	* libjava.jni/cxxtest.cc: New file.
	* libjava.jni/cxxtest.java: New file.
	* libjava.jni/jni.exp (gcj_jni_test_one): If there is no .c file,
	assume there is a .cc file.

Index: libjava.jni/cxxtest.cc
===================================================================
RCS file: cxxtest.cc
diff -N cxxtest.cc
--- /dev/null	Tue May  5 13:32:27 1998
+++ libjava.jni/cxxtest.cc Fri Dec 14 13:53:31 2001
@@ -0,0 +1,24 @@
+#include <jni.h>
+#include <cxxtest.h>
+
+jobjectArray
+Java_cxxtest_fetch (JNIEnv *env, jobject _this)
+{
+  jclass cls;
+  jfieldID fid;
+  jobjectArray obj;
+
+  cls = env->GetObjectClass (_this);
+  if (! cls)
+    return 0;
+
+  fid = env->GetFieldID (cls, "F", "[Ljava/lang/Object;");
+  if (! fid)
+    return 0;
+
+  obj = reinterpret_cast<jobjectArray> (env->GetObjectField (_this, fid));
+
+  return obj;
+}
+
+
Index: libjava.jni/cxxtest.java
===================================================================
RCS file: cxxtest.java
diff -N cxxtest.java
--- /dev/null	Tue May  5 13:32:27 1998
+++ libjava.jni/cxxtest.java Fri Dec 14 13:53:31 2001
@@ -0,0 +1,25 @@
+// Test for array field lookup.
+
+public class cxxtest
+{
+  // A field for us to look up.
+  public Object[] F = new Object[7];
+
+  public native Object[] fetch ();
+
+  public void doit ()
+  {
+    System.out.println (F == fetch ());
+  }
+
+  public static void main (String[] args)
+  {
+    cxxtest q = new cxxtest ();
+    q.doit ();
+  }
+
+  static
+  {
+    System.loadLibrary ("cxxtest");
+  }
+}
Index: libjava.jni/cxxtest.out
===================================================================
RCS file: cxxtest.out
diff -N cxxtest.out
--- /dev/null	Tue May  5 13:32:27 1998
+++ libjava.jni/cxxtest.out Fri Dec 14 13:53:31 2001
@@ -0,0 +1 @@
+true
Index: libjava.jni/jni.exp
===================================================================
RCS file: /cvs/gcc/gcc/libjava/testsuite/libjava.jni/jni.exp,v
retrieving revision 1.2
diff -u -r1.2 jni.exp
--- libjava.jni/jni.exp 2001/06/25 04:48:55 1.2
+++ libjava.jni/jni.exp 2001/12/14 21:53:31
@@ -106,6 +106,13 @@
   }
 
   set cfile [file rootname $file].c
+  set cxxflags ""
+  # If there is no `.c' file, assume there is a `.cc' file.
+  if {! [file exists $cfile]} {
+    set cfile [file rootname $file].cc
+    set cxxflags "-lstdc++"
+  }
+
   if {! [gcj_jni_compile_c_to_so $cfile]} {
     # FIXME
     return 0
@@ -113,7 +120,7 @@
 
   # We use -l$main because the .so is named the same as the main
   # program.
-  set args [list "additional_flags=-fjni -L. -l$main"]
+  set args [list "additional_flags=-fjni -L. -l$main $cxxflags"]
   if {! [gcj_link $main $main $file $args]} {
     # FIXME
     return 0