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Diffstat (limited to 'src/core/file_sys/archive_backend.h')
| -rw-r--r-- | src/core/file_sys/archive_backend.h | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/src/core/file_sys/archive_backend.h b/src/core/file_sys/archive_backend.h new file mode 100644 index 000000000..0558698f6 --- /dev/null +++ b/src/core/file_sys/archive_backend.h @@ -0,0 +1,255 @@ +// Copyright 2014 Citra Emulator Project +// Licensed under GPLv2 +// Refer to the license.txt file included. + +#pragma once + +#include <memory> + +#include "common/common_types.h" +#include "common/string_util.h" +#include "common/bit_field.h" + +#include "core/file_sys/file.h" +#include "core/file_sys/directory.h" + +#include "core/mem_map.h" +#include "core/hle/kernel/kernel.h" + +//////////////////////////////////////////////////////////////////////////////////////////////////// +// FileSys namespace + +namespace FileSys { + +// Path string type +enum LowPathType : u32 { + Invalid = 0, + Empty = 1, + Binary = 2, + Char = 3, + Wchar = 4 +}; + +union Mode { + u32 hex; + BitField<0, 1, u32> read_flag; + BitField<1, 1, u32> write_flag; + BitField<2, 1, u32> create_flag; +}; + +class Path { +public: + + Path(): + type(Invalid) + { + } + + Path(LowPathType type, u32 size, u32 pointer): + type(type) + { + switch (type) { + case Binary: + { + u8* data = Memory::GetPointer(pointer); + binary = std::vector<u8>(data, data + size); + break; + } + case Char: + { + const char* data = reinterpret_cast<const char*>(Memory::GetPointer(pointer)); + string = std::string(data, size - 1); // Data is always null-terminated. + break; + } + case Wchar: + { + const char16_t* data = reinterpret_cast<const char16_t*>(Memory::GetPointer(pointer)); + u16str = std::u16string(data, size/2 - 1); // Data is always null-terminated. + break; + } + default: + break; + } + } + + LowPathType GetType() const { + return type; + } + + /** + * Gets the string representation of the path for debugging + * @return String representation of the path for debugging + */ + const std::string DebugStr() const { + switch (GetType()) { + case Invalid: + return "[Invalid]"; + case Empty: + return "[Empty]"; + case Binary: + { + std::stringstream res; + res << "[Binary: "; + for (unsigned byte : binary) + res << std::hex << std::setw(2) << std::setfill('0') << byte; + res << ']'; + return res.str(); + } + case Char: + return "[Char: " + AsString() + ']'; + case Wchar: + return "[Wchar: " + AsString() + ']'; + default: + // TODO(yuriks): Add assert + LOG_ERROR(Service_FS, "LowPathType cannot be converted to string!"); + return {}; + } + } + + const std::string AsString() const { + switch (GetType()) { + case Char: + return string; + case Wchar: + return Common::UTF16ToUTF8(u16str); + case Empty: + return {}; + default: + // TODO(yuriks): Add assert + LOG_ERROR(Service_FS, "LowPathType cannot be converted to string!"); + return {}; + } + } + + const std::u16string AsU16Str() const { + switch (GetType()) { + case Char: + return Common::UTF8ToUTF16(string); + case Wchar: + return u16str; + case Empty: + return {}; + default: + // TODO(yuriks): Add assert + LOG_ERROR(Service_FS, "LowPathType cannot be converted to u16string!"); + return {}; + } + } + + const std::vector<u8> AsBinary() const { + switch (GetType()) { + case Binary: + return binary; + case Char: + return std::vector<u8>(string.begin(), string.end()); + case Wchar: + return std::vector<u8>(u16str.begin(), u16str.end()); + case Empty: + return {}; + default: + // TODO(yuriks): Add assert + LOG_ERROR(Service_FS, "LowPathType cannot be converted to binary!"); + return {}; + } + } + +private: + LowPathType type; + std::vector<u8> binary; + std::string string; + std::u16string u16str; +}; + +class ArchiveBackend : NonCopyable { +public: + virtual ~ArchiveBackend() { } + + /** + * Get a descriptive name for the archive (e.g. "RomFS", "SaveData", etc.) + */ + virtual std::string GetName() const = 0; + + /** + * Open a file specified by its path, using the specified mode + * @param path Path relative to the archive + * @param mode Mode to open the file with + * @return Opened file, or nullptr + */ + virtual std::unique_ptr<File> OpenFile(const Path& path, const Mode mode) const = 0; + + /** + * Delete a file specified by its path + * @param path Path relative to the archive + * @return Whether the file could be deleted + */ + virtual bool DeleteFile(const FileSys::Path& path) const = 0; + + /** + * Rename a File specified by its path + * @param src_path Source path relative to the archive + * @param dest_path Destination path relative to the archive + * @return Whether rename succeeded + */ + virtual bool RenameFile(const FileSys::Path& src_path, const FileSys::Path& dest_path) const = 0; + + /** + * Delete a directory specified by its path + * @param path Path relative to the archive + * @return Whether the directory could be deleted + */ + virtual bool DeleteDirectory(const FileSys::Path& path) const = 0; + + /** + * Create a directory specified by its path + * @param path Path relative to the archive + * @return Whether the directory could be created + */ + virtual bool CreateDirectory(const Path& path) const = 0; + + /** + * Rename a Directory specified by its path + * @param src_path Source path relative to the archive + * @param dest_path Destination path relative to the archive + * @return Whether rename succeeded + */ + virtual bool RenameDirectory(const FileSys::Path& src_path, const FileSys::Path& dest_path) const = 0; + + /** + * Open a directory specified by its path + * @param path Path relative to the archive + * @return Opened directory, or nullptr + */ + virtual std::unique_ptr<Directory> OpenDirectory(const Path& path) const = 0; + + /** + * Read data from the archive + * @param offset Offset in bytes to start reading data from + * @param length Length in bytes of data to read from archive + * @param buffer Buffer to read data into + * @return Number of bytes read + */ + virtual size_t Read(const u64 offset, const u32 length, u8* buffer) const = 0; + + /** + * Write data to the archive + * @param offset Offset in bytes to start writing data to + * @param length Length in bytes of data to write to archive + * @param buffer Buffer to write data from + * @param flush The flush parameters (0 == do not flush) + * @return Number of bytes written + */ + virtual size_t Write(const u64 offset, const u32 length, const u32 flush, u8* buffer) = 0; + + /** + * Get the size of the archive in bytes + * @return Size of the archive in bytes + */ + virtual size_t GetSize() const = 0; + + /** + * Set the size of the archive in bytes + */ + virtual void SetSize(const u64 size) = 0; +}; + +} // namespace FileSys |