Type Definition dart_sys::Dart_FileOpenCallback

type Dart_FileOpenCallback = Option<unsafe extern "C" fn(name: *const c_char, write: bool) -> *mut c_void>;

Callbacks provided by the embedder for file operations. If the embedder does not allow file operations these callbacks can be NULL.

Dart_FileOpenCallback - opens a file for reading or writing. \param name The name of the file to open. \param write A boolean variable which indicates if the file is to opened for writing. If there is an existing file it needs to truncated.

Dart_FileReadCallback - Read contents of file. \param data Buffer allocated in the callback into which the contents of the file are read into. It is the responsibility of the caller to free this buffer. \param file_length A variable into which the length of the file is returned. In the case of an error this value would be -1. \param stream Handle to the opened file.

Dart_FileWriteCallback - Write data into file. \param data Buffer which needs to be written into the file. \param length Length of the buffer. \param stream Handle to the opened file.

Dart_FileCloseCallback - Closes the opened file. \param stream Handle to the opened file.