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// 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
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