1 /*
   2  * Copyright (c) 2014, 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 #ifndef PLATFORMSTRING_H
  27 #define PLATFORMSTRING_H
  28 
  29 
  30 #include <string>
  31 #include <list>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 
  35 #include "jni.h"
  36 #include "Platform.h"
  37 
  38 
  39 template <typename T>
  40 class DynamicBuffer {
  41 private:
  42     T* FData;
  43     size_t FSize;
  44 
  45 public:
  46     DynamicBuffer(size_t Size) {
  47         FSize = 0;
  48         FData = NULL;
  49         Resize(Size);
  50     }
  51 
  52     ~DynamicBuffer() {
  53         delete[] FData;
  54     }
  55 
  56     T* GetData() { return FData; }
  57     size_t GetSize() { return FSize; }
  58 
  59     bool Resize(size_t Size) {
  60         FSize = Size;
  61 
  62         if (FData != NULL) {
  63             delete[] FData;
  64             FData = NULL;
  65         }
  66 
  67         if (FSize != 0) {
  68             FData = new T[FSize];
  69             if (FData != NULL) {
  70                 Zero();
  71             } else {
  72                 return false;
  73             }
  74         }
  75 
  76         return true;
  77     }
  78 
  79     void Zero() {
  80         memset(FData, 0, FSize * sizeof(T));
  81     }
  82 
  83     T& operator[](size_t index) {
  84         return FData[index];
  85     }
  86 };
  87 
  88 class PlatformString {
  89 private:
  90     char* FData; // Stored as UTF-8
  91     size_t FLength;
  92     wchar_t* FWideTStringToFree;
  93 
  94     void initialize();
  95 
  96 // Prohibit Heap-Based PlatformStrings
  97 private:
  98     static void *operator new(size_t size);
  99     static void operator delete(void *ptr);
 100 
 101 public:
 102     PlatformString(void);
 103     PlatformString(const PlatformString &value);
 104     PlatformString(const char* value);
 105     PlatformString(const wchar_t* value);
 106     PlatformString(const std::string &value);
 107     PlatformString(const std::wstring &value);
 108     PlatformString(size_t Value);
 109 
 110     static TString Format(const TString value, ...);
 111 
 112     ~PlatformString(void);
 113 
 114     size_t length();
 115 
 116     char* c_str();
 117     char* toMultibyte();
 118     wchar_t* toWideString();
 119     std::wstring toUnicodeString();
 120     std::string toStdString();
 121     TCHAR* toPlatformString();
 122     TString toString();
 123 
 124     operator char* ();
 125     operator wchar_t* ();
 126     operator std::wstring ();
 127 
 128     // Caller must free result using delete[].
 129     static char* duplicate(const char* Value);
 130 
 131     // Caller must free result using delete[].
 132     static wchar_t* duplicate(const wchar_t* Value);
 133 };
 134 
 135 
 136 #endif // PLATFORMSTRING_H