emulators/emulator-base-native/c/jniHelper.c

   1 /* -*- Mode: C; indent-tabs-mode: t; tab-width: 4 -*-
   2 // ---------------------------------------------------------------------------
   3 // SquirrelJME
   4 //     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
   5 // ---------------------------------------------------------------------------
   6 // SquirrelJME is under the Mozilla Public License Version 2.0.
   7 // See license.mkd for licensing and copyright information.
   8 // -------------------------------------------------------------------------*/
   9
  10 #include <string.h>
  11 #include <jni.h>
  12
  13 #include "squirreljme.h"
  14 #include "sjme/debug.h"
  15
  16 sjme_jboolean sjme_jni_checkVMException(JNIEnv* env)
  17 {
  18         /* Was there an exception? */
  19         if ((*env)->ExceptionCheck(env))
  20         {
  21                 /* Debug print it. */
  22                 (*env)->ExceptionDescribe(env);
  23
  24                 /* Did fail! */
  25                 return SJME_JNI_TRUE;
  26         }
  27
  28         return SJME_JNI_FALSE;
  29 }
  30
  31 void sjme_jni_throwMLECallError(JNIEnv* env, sjme_errorCode code)
  32 {
  33         sjme_jni_throwThrowable(env, code,
  34                 "cc/squirreljme/jvm/mle/exceptions/MLECallError");
  35 }
  36
  37 void sjme_jni_throwThrowable(JNIEnv* env, sjme_errorCode code,
  38         sjme_lpcstr type)
  39 {
  40 #define BUF_SIZE 512
  41         jclass tossingClass;
  42         char buf[BUF_SIZE];
  43
  44         /* Get the class where the exception is. */
  45         tossingClass = (*env)->FindClass(env, type);
  46         if (tossingClass == NULL)
  47         {
  48                 sjme_die("Could not find exception class?");
  49                 return;
  50         }
  51
  52         /* Generate a message accordingly. */
  53         memset(buf, 0, sizeof(buf));
  54         snprintf(buf, BUF_SIZE - 1, "Native error: %d",
  55                 (int)sjme_error_default(code));
  56         buf[BUF_SIZE - 1] = 0;
  57
  58         /* Throw it. */
  59         if ((*env)->ThrowNew(env, tossingClass, buf) != 0)
  60                 sjme_die("Could not throw a new throwable?");
  61 #undef BUF_SIZE
  62 }
  63
  64 void sjme_jni_throwVMException(JNIEnv* env, sjme_errorCode code)
  65 {
  66         sjme_jni_throwThrowable(env, code,
  67                 "cc/squirreljme/emulator/vm/VMException");
  68 }