mirror of
https://github.com/libretro/dolphin
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117 lines
2.8 KiB
C++
117 lines
2.8 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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#include "Common/Assert.h"
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#include "Common/FileUtil.h"
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#include "Common/MsgHandler.h"
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#include "DiscIO/FileBlob.h"
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namespace DiscIO
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{
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PlainFileReader::PlainFileReader(File::IOFile file) : m_file(std::move(file))
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{
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m_size = m_file.GetSize();
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}
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std::unique_ptr<PlainFileReader> PlainFileReader::Create(File::IOFile file)
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{
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if (file)
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return std::unique_ptr<PlainFileReader>(new PlainFileReader(std::move(file)));
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return nullptr;
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}
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bool PlainFileReader::Read(u64 offset, u64 nbytes, u8* out_ptr)
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{
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if (m_file.Seek(offset, SEEK_SET) && m_file.ReadBytes(out_ptr, nbytes))
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{
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return true;
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}
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else
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{
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m_file.Clear();
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return false;
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}
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}
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bool ConvertToPlain(BlobReader* infile, const std::string& infile_path,
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const std::string& outfile_path, CompressCB callback, void* arg)
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{
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ASSERT(infile->IsDataSizeAccurate());
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File::IOFile outfile(outfile_path, "wb");
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if (!outfile)
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{
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PanicAlertT("Failed to open the output file \"%s\".\n"
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"Check that you have permissions to write the target folder and that the media can "
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"be written.",
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outfile_path.c_str());
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return false;
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}
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constexpr size_t DESIRED_BUFFER_SIZE = 0x80000;
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u64 buffer_size = infile->GetBlockSize();
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if (buffer_size == 0)
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{
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buffer_size = DESIRED_BUFFER_SIZE;
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}
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else
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{
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while (buffer_size < DESIRED_BUFFER_SIZE)
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buffer_size *= 2;
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}
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std::vector<u8> buffer(buffer_size);
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const u64 num_buffers = (infile->GetDataSize() + buffer_size - 1) / buffer_size;
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int progress_monitor = std::max<int>(1, num_buffers / 100);
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bool success = true;
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for (u64 i = 0; i < num_buffers; i++)
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{
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if (i % progress_monitor == 0)
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{
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const bool was_cancelled =
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!callback(Common::GetStringT("Unpacking"), (float)i / (float)num_buffers, arg);
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if (was_cancelled)
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{
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success = false;
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break;
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}
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}
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const u64 inpos = i * buffer_size;
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const u64 sz = std::min(buffer_size, infile->GetDataSize() - inpos);
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if (!infile->Read(inpos, sz, buffer.data()))
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{
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PanicAlertT("Failed to read from the input file \"%s\".", infile_path.c_str());
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success = false;
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break;
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}
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if (!outfile.WriteBytes(buffer.data(), sz))
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{
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PanicAlertT("Failed to write the output file \"%s\".\n"
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"Check that you have enough space available on the target drive.",
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outfile_path.c_str());
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success = false;
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break;
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}
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}
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if (!success)
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{
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// Remove the incomplete output file.
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outfile.Close();
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File::Delete(outfile_path);
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}
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return success;
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}
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} // namespace DiscIO
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