Struct riot_sys::vfs_dir_ops

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#[repr(C)]
pub struct vfs_dir_ops { pub opendir: Option<unsafe extern "C" fn(dirp: *mut vfs_DIR, dirname: *const c_char) -> c_int>, pub readdir: Option<unsafe extern "C" fn(dirp: *mut vfs_DIR, entry: *mut vfs_dirent_t) -> c_int>, pub closedir: Option<unsafe extern "C" fn(dirp: *mut vfs_DIR) -> c_int>, }
Expand description

@brief Operations on open directories

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§opendir: Option<unsafe extern "C" fn(dirp: *mut vfs_DIR, dirname: *const c_char) -> c_int>

@brief Open a directory for reading with readdir

@param[in] dirp pointer to open directory @param[in] name null-terminated name of the dir to open, relative to the file system root, including a leading slash

@return 0 on success @return <0 on error

§readdir: Option<unsafe extern "C" fn(dirp: *mut vfs_DIR, entry: *mut vfs_dirent_t) -> c_int>

@brief Read a single entry from the open directory dirp and advance the read position by one

@p entry will be populated with information about the next entry in the directory stream @p dirp

If @p entry was updated successfully, @c readdir shall return 1.

If the end of stream was reached, @c readdir shall return 0 and @p entry shall remain untouched.

@param[in] dirp pointer to open directory @param[out] entry directory entry information

@return 1 if @p entry was updated @return 0 if @p dirp has reached the end of the directory index @return <0 on error

§closedir: Option<unsafe extern "C" fn(dirp: *mut vfs_DIR) -> c_int>

@brief Close an open directory

@param[in] dirp pointer to open directory

@return 0 on success @return <0 on error, the directory stream dirp should be considered invalid

Trait Implementations§

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impl Clone for vfs_dir_ops

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fn clone(&self) -> vfs_dir_ops

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for vfs_dir_ops

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for vfs_dir_ops

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fn default() -> vfs_dir_ops

Returns the “default value” for a type. Read more
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impl Copy for vfs_dir_ops

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.