72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2013 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#ifndef XENIA_VFS_DEVICES_DISC_IMAGE_DEVICE_H_
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#define XENIA_VFS_DEVICES_DISC_IMAGE_DEVICE_H_
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#include <memory>
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#include <string>
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#include "xenia/base/mapped_memory.h"
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#include "xenia/vfs/device.h"
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namespace xe {
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namespace vfs {
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class DiscImageEntry;
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class DiscImageDevice : public Device {
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public:
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DiscImageDevice(const std::string& mount_path,
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const std::wstring& local_path);
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~DiscImageDevice() override;
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bool Initialize() override;
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uint32_t total_allocation_units() const override {
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return uint32_t(mmap_->size() / sectors_per_allocation_unit() /
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bytes_per_sector());
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}
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uint32_t available_allocation_units() const override { return 0; }
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uint32_t sectors_per_allocation_unit() const override { return 1; }
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uint32_t bytes_per_sector() const override { return 2 * 1024; }
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private:
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enum class Error {
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kSuccess = 0,
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kErrorOutOfMemory = -1,
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kErrorReadError = -10,
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kErrorFileMismatch = -30,
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kErrorDamagedFile = -31,
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};
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std::wstring local_path_;
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std::unique_ptr<MappedMemory> mmap_;
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typedef struct {
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uint8_t* ptr;
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size_t size; // Size (bytes) of total image.
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size_t game_offset; // Offset (bytes) of game partition.
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size_t root_sector; // Offset (sector) of root.
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size_t root_offset; // Offset (bytes) of root.
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size_t root_size; // Size (bytes) of root.
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} ParseState;
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Error Verify(ParseState* state);
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bool VerifyMagic(ParseState* state, size_t offset);
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Error ReadAllEntries(ParseState* state, const uint8_t* root_buffer);
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bool ReadEntry(ParseState* state, const uint8_t* buffer,
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uint16_t entry_ordinal, DiscImageEntry* parent);
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};
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} // namespace vfs
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} // namespace xe
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#endif // XENIA_VFS_DEVICES_DISC_IMAGE_DEVICE_H_
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