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// Copyright 2013 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 "webkit/fileapi/media/picasa/pmp_test_helper.h"
#include <algorithm>
#include <iterator>
#include "base/file_util.h"
#include "base/logging.h"
#include "base/utf_string_conversions.h"
#include "webkit/fileapi/media/picasa/pmp_column_reader.h"
namespace picasaimport {
namespace {
bool WriteToFile(const base::FilePath& path, std::vector<uint8> data) {
// Cast for usage in WriteFile function
const char* data_char = reinterpret_cast<const char*>(&data[0]);
size_t bytes_written = file_util::WriteFile(path, data_char, data.size());
return (bytes_written == data.size());
}
// Flatten a vector of elements into an array of bytes.
template<class T>
std::vector<uint8> Flatten(const std::vector<T>& elems) {
const uint8* elems0 = reinterpret_cast<const uint8*>(&elems[0]);
std::vector<uint8> data_body(elems0, elems0 + sizeof(T)*elems.size());
return data_body;
}
// Custom specialization for std::string.
template<>
std::vector<uint8> Flatten(const std::vector<std::string>& strings) {
std::vector<uint8> totalchars;
for(std::vector<std::string>::const_iterator it = strings.begin();
it != strings.end(); ++it) {
std::copy(it->begin(), it->end(), std::back_inserter(totalchars));
totalchars.push_back('\0'); // Add the null termination too.
}
return totalchars;
}
// Returns a new vector with the concatenated contents of |a| and |b|.
std::vector<uint8> CombinedVectors(const std::vector<uint8>& a,
const std::vector<uint8>& b) {
std::vector<uint8> total;
std::copy(a.begin(), a.end(), std::back_inserter(total));
std::copy(b.begin(), b.end(), std::back_inserter(total));
return total;
}
} // namespace
PmpTestHelper::PmpTestHelper() { }
bool PmpTestHelper::Init() {
return temp_dir_.CreateUniqueTempDir();
}
base::FilePath PmpTestHelper::GetTempDirPath() {
DCHECK(temp_dir_.IsValid());
return temp_dir_.path();
}
template<class T>
bool PmpTestHelper::WriteColumnFileFromVector(
const std::string& table_name, const std::string& column_name,
const PmpFieldType field_type, const std::vector<T>& elements_vector) {
DCHECK(temp_dir_.IsValid());
std::string file_name = table_name + "_" + column_name + "." + kPmpExtension;
base::FilePath path = temp_dir_.path().Append(
base::FilePath::FromUTF8Unsafe(file_name));
std::vector<uint8> data = PmpTestHelper::MakeHeaderAndBody(
field_type, elements_vector.size(), elements_vector);
return WriteToFile(path, data);
}
// Explicit Instantiation for all the valid types.
template bool PmpTestHelper::WriteColumnFileFromVector<std::string>(
const std::string&, const std::string&, const PmpFieldType,
const std::vector<std::string>&);
template bool PmpTestHelper::WriteColumnFileFromVector<uint32>(
const std::string&, const std::string&, const PmpFieldType,
const std::vector<uint32>&);
template bool PmpTestHelper::WriteColumnFileFromVector<double>(
const std::string&, const std::string&, const PmpFieldType,
const std::vector<double>&);
template bool PmpTestHelper::WriteColumnFileFromVector<uint8>(
const std::string&, const std::string&, const PmpFieldType,
const std::vector<uint8>&);
template bool PmpTestHelper::WriteColumnFileFromVector<uint64>(
const std::string&, const std::string&, const PmpFieldType,
const std::vector<uint64>&);
bool PmpTestHelper::InitColumnReaderFromBytes(
PmpColumnReader* const reader, const std::vector<uint8>& data,
uint32* rows_read) {
DCHECK(temp_dir_.IsValid());
base::FilePath temp_path;
if (!file_util::CreateTemporaryFileInDir(temp_dir_.path(), &temp_path) ||
!WriteToFile(temp_path, data)) {
return false;
}
bool success = reader->Init(temp_path, rows_read);
file_util::Delete(temp_path, true);
return success;
}
// Return a vector so we don't have to worry about memory management.
std::vector<uint8> PmpTestHelper::MakeHeader(const PmpFieldType field_type,
const uint32 row_count) {
std::vector<uint8> header(picasaimport::kPmpHeaderSize);
// Copy in magic bytes.
memcpy(&header[picasaimport::kPmpMagic1Offset], &picasaimport::kPmpMagic1,
sizeof(picasaimport::kPmpMagic1));
memcpy(&header[picasaimport::kPmpMagic2Offset], &picasaimport::kPmpMagic2,
sizeof(picasaimport::kPmpMagic2));
memcpy(&header[picasaimport::kPmpMagic3Offset], &picasaimport::kPmpMagic3,
sizeof(picasaimport::kPmpMagic3));
memcpy(&header[picasaimport::kPmpMagic4Offset], &picasaimport::kPmpMagic4,
sizeof(picasaimport::kPmpMagic4));
// Copy in field type.
memcpy(&header[picasaimport::kPmpFieldType1Offset], &field_type, 2);
memcpy(&header[picasaimport::kPmpFieldType2Offset], &field_type, 2);
// Copy in row count.
memcpy(&header[picasaimport::kPmpRowCountOffset], &row_count, 4);
return header;
}
template<class T>
std::vector<uint8> PmpTestHelper::MakeHeaderAndBody(
const PmpFieldType field_type, const uint32 row_count,
const std::vector<T>& elems) {
return CombinedVectors(PmpTestHelper::MakeHeader(field_type, row_count),
Flatten(elems));
}
// Explicit Instantiation for all the valid types.
template std::vector<uint8> PmpTestHelper::MakeHeaderAndBody<std::string>(
const PmpFieldType, const uint32, const std::vector<std::string>&);
template std::vector<uint8> PmpTestHelper::MakeHeaderAndBody<uint32>(
const PmpFieldType, const uint32, const std::vector<uint32>&);
template std::vector<uint8> PmpTestHelper::MakeHeaderAndBody<double>(
const PmpFieldType, const uint32, const std::vector<double>&);
template std::vector<uint8> PmpTestHelper::MakeHeaderAndBody<uint8>(
const PmpFieldType, const uint32, const std::vector<uint8>&);
template std::vector<uint8> PmpTestHelper::MakeHeaderAndBody<uint64>(
const PmpFieldType, const uint32, const std::vector<uint64>&);
} // namespace picasaimport
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