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/* java_io_VMObjectStreamClass.c -- Native methods for VMObjectStreamClass.java

   Copyright (C) 2003, 2004 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

#include <jni.h>

#include <jcl.h>

#include <stdlib.h>

#include <string.h>

#include "java_io_VMObjectStreamClass.h"

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    hasClassInitializer

 * Signature: (Ljava/lang/Class;)Z

 */

JNIEXPORT jboolean JNICALL

Java_java_io_VMObjectStreamClass_hasClassInitializer (JNIEnv * env,

                                                      jclass vmosklass

                                                      __attribute__ ((__unused__)), jclass klass)

{

  jmethodID mid = (*env)->GetStaticMethodID (env, klass, "<clinit>", "()V");

  if (mid == NULL)

    {

      (*env)->ExceptionClear (env);

      return JNI_FALSE;

    }

  return JNI_TRUE;

}

static void

throwInternalError (JNIEnv * env)

{

  jclass internalErrorClass;

  jthrowable previousException, newException;

  jmethodID initException, getMessageID, initCauseID;

  jstring message;

  internalErrorClass = (*env)->FindClass (env, "java/lang/InternalError");

  /** Just give up if this also fails. */

  if (internalErrorClass == NULL)

    return;

  previousException = (*env)->ExceptionOccurred (env);

  if (previousException == NULL)

    {

      (*env)->ThrowNew (env, internalErrorClass,

                        "Unknown error raised by the VM");

      return;

    }

  initException = (*env)->GetMethodID

    (env, internalErrorClass, "<init>", "(Ljava/lang/String;)V");

  getMessageID = (*env)->GetMethodID

    (env, (*env)->GetObjectClass (env, previousException),

     "getMessage", "()Ljava/lang/String;");

  initCauseID = (*env)->GetMethodID

    (env, internalErrorClass, "initCause", "(Ljava/lang/Throwable;)V");

  message = (*env)->CallObjectMethod (env, previousException, getMessageID);

  newException = (*env)->NewObject (env, internalErrorClass, initException,

                                    message);

  (*env)->CallVoidMethod (env, newException, initCauseID, previousException);

  (*env)->ExceptionClear (env);

  (*env)->Throw (env, newException);

}

static jfieldID

getFieldReference (JNIEnv * env, jobject field, const char *type)

{

  jclass classClass;

  jclass fieldClass;

  jclass declaringClass;

  jclass typeClass;

  jfieldID fid;

  const char *field_name;

  const char *type_name;

  int type_len;

  jmethodID mid;

  jstring name;

  jstring tname;

  int i;

  fieldClass = (*env)->GetObjectClass (env, field);

  mid =

    (*env)->GetMethodID (env, fieldClass, "getName", "()Ljava/lang/String;");

  if (mid == NULL || (*env)->ExceptionOccurred (env) != NULL)

    {

      throwInternalError (env);

      return NULL;

    }

  name = (*env)->CallObjectMethod (env, field, mid);

  field_name = (*env)->GetStringUTFChars (env, name, NULL);

  mid = (*env)->GetMethodID (env, fieldClass,

                             "getDeclaringClass", "()Ljava/lang/Class;");

  if (mid == NULL || (*env)->ExceptionOccurred (env) != NULL)

    {

      throwInternalError (env);

      return NULL;

    }

  declaringClass = (*env)->CallObjectMethod (env, field, mid);

  /* Do we need to find out the exact type descriptor of the field? */

  if (type == NULL)

    {

      char *the_type;

      mid = (*env)->GetMethodID (env, fieldClass,

                                 "getType", "()Ljava/lang/Class;");

      if (mid == NULL || (*env)->ExceptionOccurred (env) != NULL)

        {

          throwInternalError (env);

          return NULL;

        }

      typeClass = (*env)->CallObjectMethod (env, field, mid);

      classClass = (*env)->FindClass (env, "java/lang/Class");

      mid = (*env)->GetMethodID (env, classClass,

                                 "getName", "()Ljava/lang/String;");

      if (mid == NULL || (*env)->ExceptionOccurred (env) != NULL)

        {

          throwInternalError (env);

          return NULL;

        }

      tname = (*env)->CallObjectMethod (env, typeClass, mid);

      type_name = (*env)->GetStringUTFChars (env, tname, NULL);

      /*

       * If it isn't an array class then the actual field type descriptor

       * starts with 'L', ends with ';' and has '/' instead of '.'.

       */

      type_len = strlen (type_name);

      if (type_name[0] != '[')

        {

          /* XXX - FIXME - should not use dynamic allocation in core lib. */

          the_type = (char *) malloc (type_len + 3);

          the_type[0] = 'L';

          the_type[type_len + 1] = ';';

          the_type[type_len + 2] = '\0';

          the_type++;

        }

      else

        {

          /* XXX - FIXME - should not use dynamic allocation in core lib. */

          the_type = (char *) malloc (type_len + 1);

          the_type[type_len] = '\0';

        }

      for (i = 0; i < type_len; i++)

        if (type_name[i] == '.')

          the_type[i] = '/';

        else

          the_type[i] = type_name[i];

      if (type_name[0] != '[')

        the_type--;

      (*env)->ReleaseStringUTFChars (env, tname, type_name);

      fid = (*env)->GetFieldID (env, declaringClass, field_name, the_type);

      free (the_type);

    }

  else

    {

      type_len = -1;

      fid = (*env)->GetFieldID (env, declaringClass, field_name, type);

    }

  if (fid == NULL)

    {

      throwInternalError (env);

      return NULL;

    }

  (*env)->ReleaseStringUTFChars (env, name, field_name);

  return fid;

}

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    setBooleanNative

 * Signature: (Ljava/lang/reflect/Field;Ljava/lang/Object;Z)V

 */

JNIEXPORT void JNICALL

Java_java_io_VMObjectStreamClass_setBooleanNative (JNIEnv * env,

                                                   jclass vmosklass

                                                   __attribute__ ((__unused__)), jobject field, jobject object, jboolean value)

{

  jfieldID fid = getFieldReference (env, field, "Z");

  if (fid != NULL)

    (*env)->SetBooleanField (env, object, fid, value);

}

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    setCharNative

 * Signature: (Ljava/lang/reflect/Field;Ljava/lang/Object;C)V

 */

JNIEXPORT void JNICALL

Java_java_io_VMObjectStreamClass_setCharNative (JNIEnv * env,

                                                jclass vmosklass

                                                __attribute__ ((__unused__)),

                                                jobject field,

                                                jobject object, jchar value)

{

  jfieldID fid = getFieldReference (env, field, "C");

  if (fid != NULL)

    (*env)->SetCharField (env, object, fid, value);

}

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    setByteNative

 * Signature: (Ljava/lang/reflect/Field;Ljava/lang/Object;B)V

 */

JNIEXPORT void JNICALL

Java_java_io_VMObjectStreamClass_setByteNative (JNIEnv * env,

                                                jclass vmosklass

                                                __attribute__ ((__unused__)),

                                                jobject field,

                                                jobject object, jbyte value)

{

  jfieldID fid = getFieldReference (env, field, "B");

  if (fid != NULL)

    (*env)->SetByteField (env, object, fid, value);

}

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    setShortNative

 * Signature: (Ljava/lang/reflect/Field;Ljava/lang/Object;S)V

 */

JNIEXPORT void JNICALL

Java_java_io_VMObjectStreamClass_setShortNative (JNIEnv * env,

                                                 jclass vmosklass

                                                 __attribute__ ((__unused__)),

                                                 jobject field,

                                                 jobject object, jshort value)

{

  jfieldID fid = getFieldReference (env, field, "S");

  if (fid != NULL)

    (*env)->SetShortField (env, object, fid, value);

}

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    setIntNative

 * Signature: (Ljava/lang/reflect/Field;Ljava/lang/Object;I)V

 */

JNIEXPORT void JNICALL

Java_java_io_VMObjectStreamClass_setIntNative (JNIEnv * env,

                                               jclass vmosklass

                                               __attribute__ ((__unused__)),

                                               jobject field,

                                               jobject object, jint value)

{

  jfieldID fid = getFieldReference (env, field, "I");

  if (fid != NULL)

    (*env)->SetIntField (env, object, fid, value);

}

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    setLongNative

 * Signature: (Ljava/lang/reflect/Field;Ljava/lang/Object;J)V

 */

JNIEXPORT void JNICALL

Java_java_io_VMObjectStreamClass_setLongNative (JNIEnv * env,

                                                jclass vmosklass

                                                __attribute__ ((__unused__)),

                                                jobject field,

                                                jobject object, jlong value)

{

  jfieldID fid = getFieldReference (env, field, "J");

  if (fid != NULL)

    (*env)->SetLongField (env, object, fid, value);

}

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    setFloatNative

 * Signature: (Ljava/lang/reflect/Field;Ljava/lang/Object;F)V

 */

JNIEXPORT void JNICALL

Java_java_io_VMObjectStreamClass_setFloatNative (JNIEnv * env,

                                                 jclass vmosklass

                                                 __attribute__ ((__unused__)),

                                                 jobject field,

                                                 jobject object, jfloat value)

{

  jfieldID fid = getFieldReference (env, field, "F");

  if (fid != NULL)

    (*env)->SetFloatField (env, object, fid, value);

}

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    setDoubleNative

 * Signature: (Ljava/lang/reflect/Field;Ljava/lang/Object;D)V

 */

JNIEXPORT void JNICALL

Java_java_io_VMObjectStreamClass_setDoubleNative (JNIEnv * env,

                                                  jclass vmosklass

                                                  __attribute__ ((__unused__)), jobject field, jobject object, jdouble value)

{

  jfieldID fid = getFieldReference (env, field, "D");

  if (fid != NULL)

    (*env)->SetDoubleField (env, object, fid, value);

}

/*

 * Class:     java_io_VMObjectOutputStream

 * Method:    setObjectNative

 * Signature: (Ljava/lang/reflect/Field;Ljava/lang/Object;Ljava/lang/Object;)V

 */

JNIEXPORT void JNICALL

Java_java_io_VMObjectStreamClass_setObjectNative (JNIEnv * env,

                                                  jclass vmosklass

                                                  __attribute__ ((__unused__)), jobject field, jobject object, jobject value)

{

  jfieldID fid = getFieldReference (env, field, NULL);

  if (fid != NULL)

    (*env)->SetObjectField (env, object, fid, value);

}