src/java.base/share/native/libjimage/NativeImageBuffer.cpp

/*
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 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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#include <string.h>

#include "jni.h"
#include "jni_util.h"

#include "endian.hpp"
#include "imageDecompressor.hpp"
#include "imageFile.hpp"
#include "inttypes.hpp"
#include "jimage.hpp"
#include "osSupport.hpp"

#include "jdk_internal_jimage_NativeImageBuffer.h"


JNIEXPORT jobject JNICALL
Java_jdk_internal_jimage_NativeImageBuffer_getNativeMap(JNIEnv *env,
        jclass cls, jstring path) {
    const char *nativePath = env->GetStringUTFChars(path, NULL);
    ImageFileReader* reader = ImageFileReader::find_image(nativePath);
    env->ReleaseStringUTFChars(path, nativePath);

    if (reader != NULL) {
        return env->NewDirectByteBuffer(reader->get_index_address(), (jlong)reader->map_size());
    }

    return 0;
}