| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ppapi/cpp/file_io.h" |
| |
| #include <string.h> // memcpy |
| |
| #include "ppapi/c/ppb_file_io.h" |
| #include "ppapi/c/pp_errors.h" |
| #include "ppapi/cpp/completion_callback.h" |
| #include "ppapi/cpp/file_ref.h" |
| #include "ppapi/cpp/instance_handle.h" |
| #include "ppapi/cpp/module.h" |
| #include "ppapi/cpp/module_impl.h" |
| |
| namespace pp { |
| |
| namespace { |
| |
| template <> const char* interface_name<PPB_FileIO_1_0>() { |
| return PPB_FILEIO_INTERFACE_1_0; |
| } |
| |
| template <> const char* interface_name<PPB_FileIO_1_1>() { |
| return PPB_FILEIO_INTERFACE_1_1; |
| } |
| |
| } // namespace |
| |
| FileIO::FileIO() { |
| } |
| |
| FileIO::FileIO(const InstanceHandle& instance) { |
| if (has_interface<PPB_FileIO_1_1>()) { |
| PassRefFromConstructor(get_interface<PPB_FileIO_1_1>()->Create( |
| instance.pp_instance())); |
| } else if (has_interface<PPB_FileIO_1_0>()) { |
| PassRefFromConstructor(get_interface<PPB_FileIO_1_0>()->Create( |
| instance.pp_instance())); |
| } |
| } |
| |
| FileIO::FileIO(const FileIO& other) |
| : Resource(other) { |
| } |
| |
| int32_t FileIO::Open(const FileRef& file_ref, |
| int32_t open_flags, |
| const CompletionCallback& cc) { |
| if (has_interface<PPB_FileIO_1_1>()) { |
| return get_interface<PPB_FileIO_1_1>()->Open( |
| pp_resource(), file_ref.pp_resource(), open_flags, |
| cc.pp_completion_callback()); |
| } else if (has_interface<PPB_FileIO_1_0>()) { |
| return get_interface<PPB_FileIO_1_0>()->Open( |
| pp_resource(), file_ref.pp_resource(), open_flags, |
| cc.pp_completion_callback()); |
| } |
| return cc.MayForce(PP_ERROR_NOINTERFACE); |
| } |
| |
| int32_t FileIO::Query(PP_FileInfo* result_buf, |
| const CompletionCallback& cc) { |
| if (has_interface<PPB_FileIO_1_1>()) { |
| return get_interface<PPB_FileIO_1_1>()->Query( |
| pp_resource(), result_buf, cc.pp_completion_callback()); |
| } else if (has_interface<PPB_FileIO_1_0>()) { |
| return get_interface<PPB_FileIO_1_0>()->Query( |
| pp_resource(), result_buf, cc.pp_completion_callback()); |
| } |
| return cc.MayForce(PP_ERROR_NOINTERFACE); |
| } |
| |
| int32_t FileIO::Touch(PP_Time last_access_time, |
| PP_Time last_modified_time, |
| const CompletionCallback& cc) { |
| if (has_interface<PPB_FileIO_1_1>()) { |
| return get_interface<PPB_FileIO_1_1>()->Touch( |
| pp_resource(), last_access_time, last_modified_time, |
| cc.pp_completion_callback()); |
| } else if (has_interface<PPB_FileIO_1_0>()) { |
| return get_interface<PPB_FileIO_1_0>()->Touch( |
| pp_resource(), last_access_time, last_modified_time, |
| cc.pp_completion_callback()); |
| } |
| return cc.MayForce(PP_ERROR_NOINTERFACE); |
| } |
| |
| int32_t FileIO::Read(int64_t offset, |
| char* buffer, |
| int32_t bytes_to_read, |
| const CompletionCallback& cc) { |
| if (has_interface<PPB_FileIO_1_1>()) { |
| return get_interface<PPB_FileIO_1_1>()->Read(pp_resource(), |
| offset, buffer, bytes_to_read, cc.pp_completion_callback()); |
| } else if (has_interface<PPB_FileIO_1_0>()) { |
| return get_interface<PPB_FileIO_1_0>()->Read(pp_resource(), |
| offset, buffer, bytes_to_read, cc.pp_completion_callback()); |
| } |
| return cc.MayForce(PP_ERROR_NOINTERFACE); |
| } |
| |
| int32_t FileIO::Read( |
| int32_t offset, |
| int32_t max_read_length, |
| const CompletionCallbackWithOutput< std::vector<char> >& cc) { |
| if (has_interface<PPB_FileIO_1_1>()) { |
| PP_ArrayOutput array_output = cc.output(); |
| return get_interface<PPB_FileIO_1_1>()->ReadToArray(pp_resource(), |
| offset, max_read_length, &array_output, |
| cc.pp_completion_callback()); |
| } else if (has_interface<PPB_FileIO_1_0>()) { |
| // Data for our callback wrapper. The callback handler will delete it and |
| // temp_buffer. |
| CallbackData1_0* data = new CallbackData1_0; |
| data->output = cc.output(); |
| data->temp_buffer = max_read_length >= 0 ? new char[max_read_length] : NULL; |
| data->original_callback = cc.pp_completion_callback(); |
| |
| // Actual returned bytes might not equals to max_read_length. We need to |
| // read to a temporary buffer first and copy later to make sure the array |
| // buffer has correct size. |
| return get_interface<PPB_FileIO_1_0>()->Read( |
| pp_resource(), offset, data->temp_buffer, max_read_length, |
| PP_MakeCompletionCallback(&CallbackConverter, data)); |
| } |
| return cc.MayForce(PP_ERROR_NOINTERFACE); |
| } |
| |
| int32_t FileIO::Write(int64_t offset, |
| const char* buffer, |
| int32_t bytes_to_write, |
| const CompletionCallback& cc) { |
| if (has_interface<PPB_FileIO_1_1>()) { |
| return get_interface<PPB_FileIO_1_1>()->Write( |
| pp_resource(), offset, buffer, bytes_to_write, |
| cc.pp_completion_callback()); |
| } else if (has_interface<PPB_FileIO_1_0>()) { |
| return get_interface<PPB_FileIO_1_0>()->Write( |
| pp_resource(), offset, buffer, bytes_to_write, |
| cc.pp_completion_callback()); |
| } |
| return cc.MayForce(PP_ERROR_NOINTERFACE); |
| } |
| |
| int32_t FileIO::SetLength(int64_t length, |
| const CompletionCallback& cc) { |
| if (has_interface<PPB_FileIO_1_1>()) { |
| return get_interface<PPB_FileIO_1_1>()->SetLength( |
| pp_resource(), length, cc.pp_completion_callback()); |
| } else if (has_interface<PPB_FileIO_1_0>()) { |
| return get_interface<PPB_FileIO_1_0>()->SetLength( |
| pp_resource(), length, cc.pp_completion_callback()); |
| } |
| return cc.MayForce(PP_ERROR_NOINTERFACE); |
| } |
| |
| int32_t FileIO::Flush(const CompletionCallback& cc) { |
| if (has_interface<PPB_FileIO_1_1>()) { |
| return get_interface<PPB_FileIO_1_1>()->Flush( |
| pp_resource(), cc.pp_completion_callback()); |
| } else if (has_interface<PPB_FileIO_1_0>()) { |
| return get_interface<PPB_FileIO_1_0>()->Flush( |
| pp_resource(), cc.pp_completion_callback()); |
| } |
| return cc.MayForce(PP_ERROR_NOINTERFACE); |
| } |
| |
| void FileIO::Close() { |
| if (has_interface<PPB_FileIO_1_1>()) |
| get_interface<PPB_FileIO_1_1>()->Close(pp_resource()); |
| else if (has_interface<PPB_FileIO_1_0>()) |
| get_interface<PPB_FileIO_1_0>()->Close(pp_resource()); |
| } |
| |
| // static |
| void FileIO::CallbackConverter(void* user_data, int32_t result) { |
| CallbackData1_0* data = static_cast<CallbackData1_0*>(user_data); |
| |
| if (result >= 0) { |
| // Copy to the destination buffer owned by the callback. |
| char* buffer = static_cast<char*>(data->output.GetDataBuffer( |
| data->output.user_data, result, sizeof(char))); |
| memcpy(buffer, data->temp_buffer, result); |
| delete[] data->temp_buffer; |
| } |
| |
| // Now execute the original callback. |
| PP_RunCompletionCallback(&data->original_callback, result); |
| delete data; |
| } |
| |
| } // namespace pp |