#include "javatech_jni22_StringExample.h"
#include <stdio.h>
#include <string.h>

JNIEXPORT jstring JNICALL
    Java_javatech_jni22_StringExample_nativeProcessString
    (JNIEnv *jenv, jobject jo, jstring js)
{
    // Get jstring into C string format.
    const char* cs = jenv->GetStringUTFChars (js, NULL);
    char *cstring = new char [strlen (cs) + 1]; // +1 for null terminator
    sprintf (cstring, "%s", cs);
    jenv->ReleaseStringUTFChars (js, cs);

    // Reverse the order of characters.
    int len = strlen (cstring);
    char *reverse = new char [len+1]; // + 1 for null terminator
    for (int i=0; i < len; i++)
	reverse[i] = cstring[len-i-1];
    reverse[len] = 0; // null terminate

    // Create a new jstring for return.
    jstring jreverse = jenv->NewStringUTF (reverse);
    return jreverse;
} // nativeProcessString