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90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
/*
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* Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdlib.h>
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#include "jni.h"
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#include "jni_util.h"
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#include <windows.h>
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static jstring
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environmentBlock9x(JNIEnv *env)
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{
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int i;
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jmethodID String_init_ID;
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jbyteArray bytes;
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jbyte *blockA;
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jclass string_class;
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string_class = JNU_ClassString(env);
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CHECK_NULL_RETURN(string_class, NULL);
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String_init_ID =
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(*env)->GetMethodID(env, string_class, "<init>", "([B)V");
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CHECK_NULL_RETURN(String_init_ID, NULL);
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blockA = (jbyte *) GetEnvironmentStringsA();
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if (blockA == NULL) {
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/* Both GetEnvironmentStringsW and GetEnvironmentStringsA
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* failed. Out of memory is our best guess. */
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JNU_ThrowOutOfMemoryError(env, "GetEnvironmentStrings failed");
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return NULL;
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}
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/* Don't search for "\0\0", since an empty environment block may
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legitimately consist of a single "\0". */
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for (i = 0; blockA[i];)
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while (blockA[i++])
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;
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if ((bytes = (*env)->NewByteArray(env, i)) == NULL) {
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FreeEnvironmentStringsA(blockA);
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return NULL;
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}
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(*env)->SetByteArrayRegion(env, bytes, 0, i, blockA);
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FreeEnvironmentStringsA(blockA);
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return (*env)->NewObject(env, string_class,
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String_init_ID, bytes);
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}
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/* Returns a Windows style environment block, discarding final trailing NUL */
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JNIEXPORT jstring JNICALL
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Java_java_lang_ProcessEnvironment_environmentBlock(JNIEnv *env, jclass klass)
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{
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int i;
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jstring envblock;
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jchar *blockW = (jchar *) GetEnvironmentStringsW();
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if (blockW == NULL)
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return environmentBlock9x(env);
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/* Don't search for "\u0000\u0000", since an empty environment
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block may legitimately consist of a single "\u0000". */
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for (i = 0; blockW[i];)
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while (blockW[i++])
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;
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envblock = (*env)->NewString(env, blockW, i);
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FreeEnvironmentStringsW(blockW);
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return envblock;
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}
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