151 lines
3.5 KiB
C++
151 lines
3.5 KiB
C++
#pragma once
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#include "types.h"
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#include <memory>
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#include <optional>
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#include <string>
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#include <vector>
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class CDImage;
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class ISOReader
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{
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public:
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enum : u32
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{
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SECTOR_SIZE = 2048
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};
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ISOReader();
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~ISOReader();
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bool Open(CDImage* image, u32 track_number);
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std::vector<std::string> GetFilesInDirectory(const char* path);
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bool ReadFile(const char* path, std::vector<u8>* data);
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private:
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#pragma pack(push, 1)
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struct ISOVolumeDescriptorHeader
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{
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u8 type_code;
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char standard_identifier[5];
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u8 version;
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};
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static_assert(sizeof(ISOVolumeDescriptorHeader) == 7);
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struct ISOBootRecord
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{
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ISOVolumeDescriptorHeader header;
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char boot_system_identifier[32];
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char boot_identifier[32];
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u8 data[1977];
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};
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static_assert(sizeof(ISOBootRecord) == 2048);
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struct ISOPVDDateTime
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{
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char year[4];
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char month[2];
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char day[2];
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char hour[2];
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char minute[2];
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char second[2];
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char milliseconds[2];
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s8 gmt_offset;
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};
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static_assert(sizeof(ISOPVDDateTime) == 17);
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struct ISOPrimaryVolumeDescriptor
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{
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ISOVolumeDescriptorHeader header;
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u8 unused;
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char system_identifier[32];
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char volume_identifier[32];
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char unused2[8];
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u32 total_sectors_le;
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u32 total_sectors_be;
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char unused3[32];
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u16 volume_set_size_le;
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u16 volume_set_size_be;
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u16 volume_sequence_number_le;
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u16 volume_sequence_number_be;
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u16 block_size_le;
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u16 block_size_be;
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u32 path_table_size_le;
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u32 path_table_size_be;
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u32 path_table_location_le;
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u32 optional_path_table_location_le;
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u32 path_table_location_be;
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u32 optional_path_table_location_be;
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u8 root_directory_entry[34];
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char volume_set_identifier[128];
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char publisher_identifier[128];
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char data_preparer_identifier[128];
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char application_identifier[128];
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char copyright_file_identifier[38];
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char abstract_file_identifier[36];
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char bibliographic_file_identifier[37];
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ISOPVDDateTime volume_creation_time;
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ISOPVDDateTime volume_modification_time;
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ISOPVDDateTime volume_expiration_time;
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ISOPVDDateTime volume_effective_time;
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u8 structure_version;
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u8 unused4;
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u8 application_used[512];
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u8 reserved[653];
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};
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static_assert(sizeof(ISOPrimaryVolumeDescriptor) == 2048);
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struct ISODirectoryEntryDateTime
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{
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u8 years_since_1900;
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u8 month;
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u8 day;
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u8 hour;
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u8 minute;
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u8 second;
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s8 gmt_offset;
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};
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enum ISODirectoryEntryFlags : u8
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{
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ISODirectoryEntryFlag_Hidden = (1 << 0),
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ISODirectoryEntryFlag_Directory = (1 << 1),
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ISODirectoryEntryFlag_AssociatedFile = (1 << 2),
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ISODirectoryEntryFlag_ExtendedAttributePresent = (1 << 3),
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ISODirectoryEntryFlag_OwnerGroupPermissions = (1 << 4),
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ISODirectoryEntryFlag_MoreExtents = (1 << 7),
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};
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struct ISODirectoryEntry
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{
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u8 entry_length;
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u8 extended_attribute_length;
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u32 location_le;
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u32 location_be;
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u32 length_le;
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u32 length_be;
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ISODirectoryEntryDateTime recoding_time;
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ISODirectoryEntryFlags flags;
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u8 interleaved_unit_size;
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u8 interleaved_gap_size;
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u16 sequence_le;
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u16 sequence_be;
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u8 filename_length;
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};
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#pragma pack(pop)
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bool ReadPVD();
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std::optional<ISODirectoryEntry> LocateFile(const char* path);
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std::optional<ISODirectoryEntry> LocateFile(const char* path, u8* sector_buffer, u32 directory_record_lba,
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u32 directory_record_size);
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CDImage* m_image;
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u32 m_track_number;
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ISOPrimaryVolumeDescriptor m_pvd = {};
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}; |