1 /*
   2  * Copyright (c) 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
  23  * questions.
  24  */
  25 
  26 #include "Windows.h"
  27 #include "Utils.h"
  28 
  29 #define BUFFER_SIZE 4096
  30 
  31 wstring GetStringFromJString(JNIEnv *pEnv, jstring jstr) {
  32     const jchar *pJChars = pEnv->GetStringChars(jstr, NULL);
  33     if (pJChars == NULL) {
  34         return wstring(L"");
  35     }
  36 
  37     wstring wstr(pJChars);
  38 
  39     pEnv->ReleaseStringChars(jstr, pJChars);
  40 
  41     return wstr;
  42 }
  43 
  44 jstring GetJStringFromString(JNIEnv *pEnv,
  45             const jchar *unicodeChars, jsize len) {
  46     return pEnv->NewString(unicodeChars, len);
  47 }
  48 
  49 wstring GetLongPath(wstring path) {
  50     wstring result(L"");
  51 
  52     size_t len = path.length();
  53     if (len > 1) {
  54         if (path.at(len - 1) == '\\') {
  55             path.erase(len - 1);
  56         }
  57     }
  58 
  59     TCHAR *pBuffer = new TCHAR[BUFFER_SIZE];
  60     if (pBuffer != NULL) {
  61         DWORD dwResult = GetLongPathName(path.c_str(), pBuffer, BUFFER_SIZE);
  62         if (dwResult > 0 && dwResult < BUFFER_SIZE) {
  63             result = wstring(pBuffer);
  64         } else {
  65             delete [] pBuffer;
  66             pBuffer = new TCHAR[dwResult];
  67             if (pBuffer != NULL) {
  68                 DWORD dwResult2 =
  69                         GetLongPathName(path.c_str(), pBuffer, dwResult);
  70                 if (dwResult2 == (dwResult - 1)) {
  71                     result = wstring(pBuffer);
  72                 }
  73             }
  74         }
  75 
  76         if (pBuffer != NULL) {
  77             delete [] pBuffer;
  78         }
  79     }
  80 
  81     return result;
  82 }