ABP/Android V8 integration code

jni/fileOps.cpp

Index: jni/fileOps.cpp
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+/*
+ * This file is part of the Adblock Plus,
+ * Copyright (C) 2006-2012 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <android/log.h>
+#include "ops.h"
+
+v8::Handle<v8::Value> fileExistsImpl(const v8::Arguments& args)
+{
+  v8::HandleScope handle_scope;
+
+  if (args.Length() < 1)
+  {
+    return v8::ThrowException(v8::String::New("File name expected"));
+  }
+  v8::String::AsciiValue fileName(args[0]);
+  if (!*fileName)
+  {
+    return v8::ThrowException(v8::String::New("File name isn't a string"));
+  }
+  __android_log_print(ANDROID_LOG_INFO, "JS", "fileExists(%s)", *fileName);
+
+  struct stat buf;
+  int result = stat(*fileName, &buf);
+
+  return v8::Boolean::New(result == 0 && S_ISREG(buf.st_mode));
+}
+
+v8::Handle<v8::Value> fileLastModifiedImpl(const v8::Arguments& args)
+{
+  v8::HandleScope handle_scope;
+
+  if (args.Length() < 1)
+  {
+    return v8::ThrowException(v8::String::New("File name expected"));
+  }
+  v8::String::AsciiValue fileName(args[0]);
+  if (!*fileName)
+  {
+    return v8::ThrowException(v8::String::New("File name isn't a string"));
+  }
+  __android_log_print(ANDROID_LOG_INFO, "JS", "fileLastModified(%s)", *fileName);
+
+  struct stat buf;
+  int result = stat(*fileName, &buf);
+
+  return v8::Number::New((double)buf.st_mtime * 1000);
+}
+
+v8::Handle<v8::Value> fileRemoveImpl(const v8::Arguments& args)
+{
+  v8::HandleScope handle_scope;
+
+  if (args.Length() < 1)
+  {
+    return v8::ThrowException(v8::String::New("File name expected"));
+  }
+  v8::String::AsciiValue fileName(args[0]);
+  if (!*fileName)
+  {
+    return v8::ThrowException(v8::String::New("File name isn't a string"));
+  }
+  __android_log_print(ANDROID_LOG_INFO, "JS", "fileRemove(%s)", *fileName);
+
+  int result = unlink(*fileName);
+
+  if (result == 0)
+    return v8::Undefined();
+  else
+    return v8::ThrowException(v8::String::New("File couldn't be removed"));
+}
+
+v8::Handle<v8::Value> fileRenameImpl(const v8::Arguments& args)
+{
+  v8::HandleScope handle_scope;
+
+  if (args.Length() < 2)
+  {
+    return v8::ThrowException(v8::String::New("File names expected"));
+  }
+  v8::String::AsciiValue fileName(args[0]);
+  if (!*fileName)
+  {
+    return v8::ThrowException(v8::String::New("File name isn't a string"));
+  }
+
+  v8::String::AsciiValue newPath(args[1]);
+  if (!*newPath)
+  {
+    return v8::ThrowException(v8::String::New("File name isn't a string"));
+  }
+  __android_log_print(ANDROID_LOG_INFO, "JS", "fileRename(%s, %s)", *fileName, *newPath);
+
+  int result = rename(*fileName, *newPath);
+
+  if (result == 0)
+    return v8::Undefined();
+  else
+    return v8::ThrowException(v8::String::New("File couldn't be renamed"));
+}
+
+v8::Handle<v8::Value> fileReadImpl(const v8::Arguments& args)
+{
+  v8::HandleScope handle_scope;
+
+  if (args.Length() < 1)
+  {
+    return v8::ThrowException(v8::String::New("File name expected"));
+  }
+  v8::String::AsciiValue fileName(args[0]);
+  if (!*fileName)
+  {
+    return v8::ThrowException(v8::String::New("File name isn't a string"));
+  }
+  __android_log_print(ANDROID_LOG_INFO, "JS", "fileRead(%s)", *fileName);
+
+  FILE* file = fopen(*fileName, "rb");
+  if (!file)
+  {
+    v8::Handle<v8::String> fileNameString = v8::String::New(*fileName);
+    return v8::ThrowException(v8::String::Concat(v8::String::New("Failed opening file: "), fileNameString));
+  }
+
+  fseek(file, 0, SEEK_END);
+  long size = ftell(file);
+  rewind(file);
+
+  char* buffer = new char[size];
+  if (!buffer)
+  {
+    fclose(file);
+    return v8::ThrowException(v8::String::New("Out of memory"));
+  }
+  size_t readSize = fread(buffer, 1, size, file);
+  fclose(file);
+  if (size != readSize)
+  {
+    delete buffer;
+    return v8::ThrowException(v8::String::New("File read error"));
+  }
+
+  v8::Handle<v8::String> data = v8::String::New(buffer, size);
+  delete buffer;
+  return data;
+}
+
+v8::Handle<v8::Value> fileWriteImpl(const v8::Arguments& args)
+{
+  v8::HandleScope handle_scope;
+
+  if (args.Length() < 1)
+  {
+    return v8::ThrowException(v8::String::New("File name expected"));
+  }
+  v8::String::AsciiValue fileName(args[0]);
+  if (!*fileName)
+  {
+    return v8::ThrowException(v8::String::New("File name isn't a string"));
+  }
+  __android_log_print(ANDROID_LOG_INFO, "JS", "fileWrite(%s)", *fileName);
+
+  if (args.Length() < 2)
+  {
+    return v8::ThrowException(v8::String::New("Data to write expected"));
+  }
+  v8::String::Utf8Value data(args[1]);
+  if (!*data)
+  {
+    return v8::ThrowException(v8::String::New("Data to write is not a string"));
+  }
+
+  FILE* file = fopen(*fileName, "wb");
+  if (!file)
+  {
+    v8::Handle<v8::String> fileNameString = v8::String::New(*fileName);
+    return v8::ThrowException(v8::String::Concat(v8::String::New("Failed opening file: "), fileNameString));
+  }
+
+  size_t writeSize = fwrite(*data, 1, data.length(), file);
+  fclose(file);
+
+  if (data.length() != writeSize)
+  {
+    fileRemoveImpl(args);
+    return v8::ThrowException(v8::String::New("File write error"));
+  }
+
+  return v8::Undefined();
+}