Core.OS.FileSystem.File (Visera.Core.OS.FileSystem.File)

Core.OS.FileSystem.File provides file handle FFile wrapping FILE* for open, read, write, seek and flush. Block Read/Write, ReadAll, Seek/Tell/IsEOF/error/Flush for binary or text block I/O. Move-only; handle closed on destruct.

Responsibilities

• Wraps FILE*; takes or releases handle on ctor/move; closes on destruct.
• Read(I_Buffer, I_Size, I_Count), Write(I_Data, I_Size, I_Count) (fread/fwrite semantics); ReadAll() reads entire file into TArray.
• Seek(I_Offset, I_Whence), Tell(), IsEOF(), GetError()/ClearError(), Flush() match C library behavior.
• Non-copyable, move-only; GetHandle() for underlying FILE* (C or third-party interop).

Main API

API	Description
IsOpen()	Whether a valid handle is held.
Read(buffer, size, count)	Read blocks; returns number of blocks read.
Write(data, size, count)	Write blocks; returns number of blocks written.
ReadAll()	Read entire file into TArray.
Seek(offset, whence)	Move file position (SEEK_SET/SEEK_CUR/SEEK_END).
Tell()	Current file position.
IsEOF() / GetError() / ClearError() / Flush()	Status and flush.

See also

• FileSystem — Parent module; get FFile via FFileSystem::OpenFile
• OS — Parent module
• Types.Path — Path type