Struct glib::Checksum

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pub struct Checksum { /* private fields */ }
Expand description

GLib provides a generic API for computing checksums (or ‘digests’) for a sequence of arbitrary bytes, using various hashing algorithms like MD5, SHA-1 and SHA-256. Checksums are commonly used in various environments and specifications.

To create a new GChecksum, use GLib::Checksum::new(). To free a GChecksum, use GLib::Checksum::free().

GLib supports incremental checksums using the GChecksum data structure, by calling update() as long as there’s data available and then using string() or digest() to compute the checksum and return it either as a string in hexadecimal form, or as a raw sequence of bytes. To compute the checksum for binary blobs and nul-terminated strings in one go, use the convenience functions compute_checksum_for_data() and compute_checksum_for_string(), respectively. GLib provides a generic API for computing checksums (or ‘digests’) for a sequence of arbitrary bytes, using various hashing algorithms like MD5, SHA-1 and SHA-256. Checksums are commonly used in various environments and specifications.

To create a new GChecksum, use GLib::Checksum::new(). To free a GChecksum, use GLib::Checksum::free().

GLib supports incremental checksums using the GChecksum data structure, by calling update() as long as there’s data available and then using string() or digest() to compute the checksum and return it either as a string in hexadecimal form, or as a raw sequence of bytes. To compute the checksum for binary blobs and nul-terminated strings in one go, use the convenience functions compute_checksum_for_data() and compute_checksum_for_string(), respectively.

GLib type: Boxed type with copy-on-clone semantics.

Implementations§

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impl Checksum

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pub fn as_ptr(&self) -> *mut GChecksum

Return the inner pointer to the underlying C value.

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pub unsafe fn from_glib_ptr_borrow(ptr: &*mut GChecksum) -> &Self

Borrows the underlying C value.

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pub unsafe fn from_glib_ptr_borrow_mut(ptr: &mut *mut GChecksum) -> &mut Self

Borrows the underlying C value mutably.

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impl Checksum

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pub fn new(checksum_type: ChecksumType) -> Option<Checksum>

Creates a new #GChecksum, using the checksum algorithm @checksum_type. If the @checksum_type is not known, None is returned. A #GChecksum can be used to compute the checksum, or digest, of an arbitrary binary blob, using different hashing algorithms.

A #GChecksum works by feeding a binary blob through g_checksum_update() until there is data to be checked; the digest can then be extracted using g_checksum_get_string(), which will return the checksum as a hexadecimal string; or g_checksum_get_digest(), which will return a vector of raw bytes. Once either g_checksum_get_string() or g_checksum_get_digest() have been called on a #GChecksum, the checksum will be closed and it won’t be possible to call g_checksum_update() on it anymore.

§checksum_type

the desired type of checksum

§Returns

the newly created #GChecksum, or None. Use g_checksum_free() to free the memory allocated by it. Creates a new #GChecksum, using the checksum algorithm @checksum_type. If the @checksum_type is not known, None is returned. A #GChecksum can be used to compute the checksum, or digest, of an arbitrary binary blob, using different hashing algorithms.

A #GChecksum works by feeding a binary blob through g_checksum_update() until there is data to be checked; the digest can then be extracted using g_checksum_get_string(), which will return the checksum as a hexadecimal string; or g_checksum_get_digest(), which will return a vector of raw bytes. Once either g_checksum_get_string() or g_checksum_get_digest() have been called on a #GChecksum, the checksum will be closed and it won’t be possible to call g_checksum_update() on it anymore.

§checksum_type

the desired type of checksum

§Returns

the newly created #GChecksum, or None. Use g_checksum_free() to free the memory allocated by it.

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pub fn reset(&mut self)

Resets the state of the @self back to its initial state. Resets the state of the @self back to its initial state.

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pub fn update(&mut self, data: &[u8])

Feeds @data into an existing #GChecksum. The checksum must still be open, that is g_checksum_get_string() or g_checksum_get_digest() must not have been called on @self.

§data

buffer used to compute the checksum Feeds @data into an existing #GChecksum. The checksum must still be open, that is g_checksum_get_string() or g_checksum_get_digest() must not have been called on @self.

§data

buffer used to compute the checksum

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pub fn type_get_length(checksum_type: ChecksumType) -> isize

Gets the length in bytes of digests of type @checksum_type

§checksum_type

a #GChecksumType

§Returns

the checksum length, or -1 if @checksum_type is not supported. Gets the length in bytes of digests of type @checksum_type

§checksum_type

a #GChecksumType

§Returns

the checksum length, or -1 if @checksum_type is not supported.

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impl Checksum

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pub fn digest(self) -> Vec<u8>

Gets the digest from @self as a raw binary vector and places it into @buffer. The size of the digest depends on the type of checksum.

Once this function has been called, the #GChecksum is closed and can no longer be updated with g_checksum_update().

§buffer

output buffer Gets the digest from @self as a raw binary vector and places it into @buffer. The size of the digest depends on the type of checksum.

Once this function has been called, the #GChecksum is closed and can no longer be updated with g_checksum_update().

§buffer

output buffer

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pub fn string(self) -> Option<String>

Gets the digest as a hexadecimal string.

Once this function has been called the #GChecksum can no longer be updated with g_checksum_update().

The hexadecimal characters will be lower case.

§Returns

the hexadecimal representation of the checksum. The returned string is owned by the checksum and should not be modified or freed. Gets the digest as a hexadecimal string.

Once this function has been called the #GChecksum can no longer be updated with g_checksum_update().

The hexadecimal characters will be lower case.

§Returns

the hexadecimal representation of the checksum. The returned string is owned by the checksum and should not be modified or freed.

Trait Implementations§

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impl Clone for Checksum

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fn clone(&self) -> Self

Copies the boxed type with the type-specific copy function.

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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 Checksum

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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 From<Checksum> for Value

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fn from(o: Checksum) -> Self

Converts to this type from the input type.
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impl HasParamSpec for Checksum

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type ParamSpec = ParamSpecBoxed

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type SetValue = Checksum

Preferred value to be used as setter for the associated ParamSpec.
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type BuilderFn = fn(_: &str) -> ParamSpecBoxedBuilder<'_, Checksum>

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fn param_spec_builder() -> Self::BuilderFn

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impl Hash for Checksum

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Checksum

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fn cmp(&self, other: &Checksum) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for Checksum

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fn eq(&self, other: &Checksum) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for Checksum

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fn partial_cmp(&self, other: &Checksum) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl StaticType for Checksum

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fn static_type() -> Type

Returns the type identifier of Self.
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impl Eq for Checksum

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impl Send for Checksum

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impl StructuralPartialEq for Checksum

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impl Sync for Checksum

Auto Trait Implementations§

Blanket Implementations§

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

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Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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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> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *const GList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(_: *const GList, _: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(_: *const GList, _: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GPtrArray> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *const GPtrArray, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec( _: *const GPtrArray, _: usize, ) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(_: *const GPtrArray, _: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GSList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *const GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(_: *const GSList, _: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(_: *const GSList, _: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GPtrArray> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GPtrArray, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec( ptr: *mut GPtrArray, num: usize, ) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GPtrArray, num: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GSList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GList> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(_: *const GList) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GPtrArray> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GPtrArray) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GPtrArray) -> Vec<T>

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unsafe fn from_glib_full_as_vec(_: *const GPtrArray) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GSList> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GSList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GSList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(_: *const GSList) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GList> for T

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unsafe fn from_glib_none_as_vec(ptr: *mut GList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(ptr: *mut GList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GList) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GPtrArray> for T

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unsafe fn from_glib_none_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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unsafe fn from_glib_container_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GSList> for T

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unsafe fn from_glib_none_as_vec(ptr: *mut GSList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(ptr: *mut GSList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GSList) -> Vec<T>

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