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#if !defined(ASAR_VIRTUALFILE_H) |
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#define ASAR_VIRTUALFILE_H |
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#include "autoarray.h" |
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#include "assocarr.h" |
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#include "libstr.h" |
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// RPG Hacker: A virtual file system which can work with physical files |
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// as well as in-memory files. |
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typedef void* virtual_file_handle; |
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static const virtual_file_handle INVALID_VIRTUAL_FILE_HANDLE = nullptr; |
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enum virtual_file_error |
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{ |
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vfe_none, |
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vfe_doesnt_exist, |
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vfe_access_denied, |
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vfe_not_regular_file, |
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vfe_unknown, |
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vfe_num_errors |
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}; |
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struct memory_buffer |
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{ |
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const void* data; |
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size_t length; |
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}; |
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class virtual_filesystem |
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{ |
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public: |
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void initialize(const char** include_paths, size_t num_include_paths); |
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void destroy(); |
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virtual_file_handle open_file(const char* path, const char* base_path); |
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void close_file(virtual_file_handle file_handle); |
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size_t read_file(virtual_file_handle file_handle, void* out_buffer, size_t pos, size_t num_bytes); |
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size_t get_file_size(virtual_file_handle file_handle); |
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bool is_path_absolute(const char* path); |
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string create_absolute_path(const char* base, const char* target); |
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void add_memory_file(const char* name, const void* buffer, size_t length); |
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inline virtual_file_error get_last_error() |
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{ |
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return m_last_error; |
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} |
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private: |
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enum virtual_file_type |
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{ |
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vft_physical_file, |
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vft_memory_file |
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}; |
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virtual_file_type get_file_type_from_path(const char* path); |
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assocarr<memory_buffer> m_memory_files; |
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autoarray<string> m_include_paths; |
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virtual_file_error m_last_error; |
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}; |
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#endif |
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