Borland C++ Compiler / Java Bug with JNI?

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2 total messages Started by Raffi Ismail Wed, 14 Aug 2002 04:52

#906

Author: Raffi Ismail
Date: Wed, 14 Aug 2002 04:52

17 lines
1904 bytes

I have the following code in my Native implementation of some JNI code. A java class needs to call the setInputValues(int, float[]) native function in my DLL.

JNIEXPORT void JNICALL Java_Ryno_setInputValues (JNIEnv *env, jobject obj, jint _n, jfloatArray _v)
{
  jfloat *tmp = (*env)->GetFloatArrayElements(env, _v, 0);
  for (int i = 0; i < _size_in; i++)
  {
   inputLayer[i].acc = tmp[i];
  }
  (*env)->ReleaseFloatArrayElements(env, _v, tmp, 0);
}

Here's the problem, when I compile i get the following: error:Error E2288 J:\C\FeatureMap.hpp 62: Pointer to structure required on left side of -> or ->* in function __stdcall Java_Ryno_setInputValues(JNIEnv_ *,_jobject *,long,_jfloatArray *)
Error E2288 J:\C\FeatureMap.hpp 67: Pointer to structure required on left side of -> or ->* in function __stdcall Java_Ryno_setInputValues(JNIEnv_ *,_jobject *,long,_jfloatArray *)

I know what the error means but this code has been adapted from Sun's tutorials. *env is a pointer, so what happened?

Re: Borland C++ Compiler / Java Bug with JNI?

#910

Author: John McGrath TeamB
Date: Fri, 23 Aug 2002 05:41

24 lines
1701 bytes

On 13 Aug 2002 21:52:14 -0700, Raffi Ismail wrote:

> JNIEXPORT void JNICALL Java_Ryno_setInputValues (
>     JNIEnv *env, jobject obj, jint _n, jfloatArray _v)

>   jfloat *tmp = (*env)->GetFloatArrayElements( ...

> I know what the error means but this code has been adapted from
> Sun's tutorials. *env is a pointer, so what happened?

My C++ is rather rusty, but I do not think that is right.  "env" is a 
pointer to a JNIEnv, so "*env" is a JNIEnv, not a pointer to one.  So 
I think this should be:

    jfloat *tmp = env->GetFloatArrayElements( ...

-- 
Regards,

John McGrath [TeamB]

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