src/JAVA/libjafs/GetNativeString.c

   1
   2 #include <jni.h>
   3 #include "GetNativeString.h"
   4
   5 char* GetNativeString(JNIEnv *env, jstring jstr){
   6   jbyteArray bytes = 0;
   7   jthrowable exc;
   8   char *result = 0;
   9
  10   if ((*env)->EnsureLocalCapacity(env, 2) < 0) {
  11     return 0; /* out of memory error */
  12   }
  13
  14   jclass stringClass=(*env)->FindClass(env,"java/lang/String");
  15
  16   if(!stringClass){
  17     return 0;
  18   }
  19
  20   jmethodID  MID_String_getBytes = (*env)->GetMethodID(env,stringClass,"getBytes","()[B");
  21   if(!MID_String_getBytes){
  22     return 0;
  23   }
  24
  25   bytes = (*env)->CallObjectMethod(env, jstr,
  26                                    MID_String_getBytes);
  27   exc = (*env)->ExceptionOccurred(env);
  28   if (!exc) {
  29     jint len = (*env)->GetArrayLength(env, bytes);
  30     result = malloc(len + 1);
  31     if (result == 0) {
  32
  33       /*JNU_ThrowByName(env, "java/lang/OutOfMemoryError",
  34         0);*/
  35
  36       (*env)->DeleteLocalRef(env, bytes);
  37       return 0;
  38     }
  39     (*env)->GetByteArrayRegion(env, bytes, 0, len,
  40                                (jbyte *)result);
  41     result[len] = 0; /* NULL-terminate */
  42   } else {
  43     (*env)->DeleteLocalRef(env, exc);
  44   }
  45   (*env)->DeleteLocalRef(env, bytes);
  46      return result;
  47 }
  48
  49 jstring GetJavaString(JNIEnv *env, char*);