xbmc/platform/android/activity/JNIXBMCFile.cpp

   1 /*
   2  *  Copyright (C) 2018 Christian Browet
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "JNIXBMCFile.h"
  10
  11 #include "CompileInfo.h"
  12 #include "utils/FileUtils.h"
  13 #include "utils/log.h"
  14
  15 #include <memory>
  16
  17 #include <androidjni/jutils-details.hpp>
  18
  19 #define BUFFSIZE 8192
  20
  21 using namespace jni;
  22
  23 static std::string s_className = std::string(CCompileInfo::GetClass()) + "/XBMCFile";
  24
  25 CJNIXBMCFile::CJNIXBMCFile()
  26   : CJNIBase()
  27 {
  28 }
  29
  30 void CJNIXBMCFile::RegisterNatives(JNIEnv *env)
  31 {
  32   jclass cClass = env->FindClass(s_className.c_str());
  33   if(cClass)
  34   {
  35     JNINativeMethod methods[] =
  36     {
  37       {"_open", "(Ljava/lang/String;)Z", (void*)&CJNIXBMCFile::_open},
  38       {"_close", "()V", (void*)&CJNIXBMCFile::_close},
  39       {"_read", "()[B", (void*)&CJNIXBMCFile::_read},
  40       {"_eof", "()Z", (void*)&CJNIXBMCFile::_eof},
  41     };
  42
  43     env->RegisterNatives(cClass, methods, sizeof(methods)/sizeof(methods[0]));
  44   }
  45 }
  46
  47 jboolean CJNIXBMCFile::_open(JNIEnv *env, jobject thiz, jstring path)
  48 {
  49   std::string strPath = jcast<std::string>(jhstring::fromJNI(path));
  50
  51   if (find_instance(thiz))
  52     return false;
  53
  54   if (!XFILE::CFile::Exists(strPath))
  55     return false;
  56
  57   CJNIXBMCFile* file = new CJNIXBMCFile();
  58   file->m_file = std::make_unique<XFILE::CFile>();
  59   bool ret = file->m_file->Open(strPath);
  60   if (!ret)
  61   {
  62     delete file;
  63     return false;
  64   }
  65
  66   jhobject jo = jhobject::fromJNI(thiz);
  67   jo.setGlobal();
  68   add_instance(jo, file);
  69   file->m_eof = false;
  70   return true;
  71 }
  72
  73 void CJNIXBMCFile::_close(JNIEnv *env, jobject thiz)
  74 {
  75   CJNIXBMCFile *inst = find_instance(thiz);
  76   if (inst)
  77   {
  78     inst->m_file->Close();
  79     remove_instance(inst);
  80     delete inst;
  81   }
  82 }
  83
  84 jbyteArray CJNIXBMCFile::_read(JNIEnv *env, jobject thiz)
  85 {
  86   ssize_t sz = 0;
  87   char buffer[BUFFSIZE];
  88
  89   CJNIXBMCFile *inst = find_instance(thiz);
  90   if (inst && inst->m_file)
  91   {
  92     sz = inst->m_file->Read((void*)buffer, BUFFSIZE);
  93     if (sz <= 0)
  94     {
  95       inst->m_eof = true;
  96       sz = 0;
  97     }
  98   }
  99
 100   jbyteArray jba = NULL;
 101   char*   pArray;
 102   jba = env->NewByteArray(sz);
 103   if ((pArray = (char*)env->GetPrimitiveArrayCritical(jba, NULL)))
 104   {
 105     memcpy(pArray, buffer, sz);
 106     env->ReleasePrimitiveArrayCritical(jba, pArray, 0);
 107   }
 108
 109   return jba;
 110 }
 111
 112 jboolean CJNIXBMCFile::_eof(JNIEnv *env, jobject thiz)
 113 {
 114   CJNIXBMCFile *inst = find_instance(thiz);
 115   if (inst)
 116     return inst->m_eof;
 117
 118   return true;
 119 }
 120
 121
 122
 123