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src/java.base/windows/native/libnio/ch/Iocp.c

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   1 /*
   2  * Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


 125     }
 126 }
 127 
 128 JNIEXPORT jstring JNICALL
 129 Java_sun_nio_ch_Iocp_getErrorMessage(JNIEnv* env, jclass this, jint errorCode)
 130 {
 131     WCHAR message[255];
 132 
 133     DWORD len = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM,
 134                                NULL,
 135                                (DWORD)errorCode,
 136                                0,
 137                                &message[0],
 138                                255,
 139                                NULL);
 140 
 141 
 142     if (len == 0) {
 143         return NULL;
 144     } else {
 145         if (len > 3) {
 146             // Drop final '.', CR, LF
 147             if (message[len - 1] == L'\n') len--;
 148             if (message[len - 1] == L'\r') len--;
 149             if (message[len - 1] == L'.') len--;
 150             message[len] = L'\0';
 151         }
 152 
 153         return (*env)->NewString(env, (const jchar *)message, (jsize)wcslen(message));
 154     }
 155 }
   1 /*
   2  * Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


 125     }
 126 }
 127 
 128 JNIEXPORT jstring JNICALL
 129 Java_sun_nio_ch_Iocp_getErrorMessage(JNIEnv* env, jclass this, jint errorCode)
 130 {
 131     WCHAR message[255];
 132 
 133     DWORD len = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM,
 134                                NULL,
 135                                (DWORD)errorCode,
 136                                0,
 137                                &message[0],
 138                                255,
 139                                NULL);
 140 
 141 
 142     if (len == 0) {
 143         return NULL;
 144     } else {








 145         return (*env)->NewString(env, (const jchar *)message, (jsize)wcslen(message));
 146     }
 147 }
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