/*

 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

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

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <stdlib.h>

#include "jni.h"

#include "jni_util.h"

#include <windows.h>

static jstring

environmentBlock9x(JNIEnv *env)

{

    int i;

    jmethodID String_init_ID;

    jbyteArray bytes;

    jbyte *blockA;

    jclass string_class;

    string_class = JNU_ClassString(env);

    CHECK_NULL_RETURN(string_class, NULL);

    String_init_ID =

        (*env)->GetMethodID(env, string_class, "<init>", "([B)V");

    CHECK_NULL_RETURN(String_init_ID, NULL);

    blockA = (jbyte *) GetEnvironmentStringsA();

    if (blockA == NULL) {

        /* Both GetEnvironmentStringsW and GetEnvironmentStringsA

         * failed.  Out of memory is our best guess.  */

        JNU_ThrowOutOfMemoryError(env, "GetEnvironmentStrings failed");

        return NULL;

    }

    /* Don't search for "\0\0", since an empty environment block may

       legitimately consist of a single "\0". */

    for (i = 0; blockA[i];)

        while (blockA[i++])

            ;

    if ((bytes = (*env)->NewByteArray(env, i)) == NULL) {

        FreeEnvironmentStringsA(blockA);

        return NULL;

    }

    (*env)->SetByteArrayRegion(env, bytes, 0, i, blockA);

    FreeEnvironmentStringsA(blockA);

    return (*env)->NewObject(env, string_class,

                             String_init_ID, bytes);

}

/* Returns a Windows style environment block, discarding final trailing NUL */

JNIEXPORT jstring JNICALL

Java_java_lang_ProcessEnvironment_environmentBlock(JNIEnv *env, jclass klass)

{

    int i;

    jstring envblock;

    jchar *blockW = (jchar *) GetEnvironmentStringsW();

    if (blockW == NULL)

        return environmentBlock9x(env);

    /* Don't search for "\u0000\u0000", since an empty environment

       block may legitimately consist of a single "\u0000".  */

    for (i = 0; blockW[i];)

        while (blockW[i++])

            ;

    envblock = (*env)->NewString(env, blockW, i);

    FreeEnvironmentStringsW(blockW);

    return envblock;

}