jdk/src/windows/native/java/lang/ProcessEnvironment_md.c
changeset 2 90ce3da70b43
child 5506 202f599c92aa
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/windows/native/java/lang/ProcessEnvironment_md.c	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2003 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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 =
+        (*env)->GetMethodID(env, JNU_ClassString(env), "<init>", "([B)V");
+    jbyteArray bytes;
+    jbyte *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) return NULL;
+    (*env)->SetByteArrayRegion(env, bytes, 0, i, blockA);
+    FreeEnvironmentStringsA(blockA);
+    return (*env)->NewObject(env, JNU_ClassString(env),
+                             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;
+}