Struct zstd::bulk::Decompressor [−][src]
pub struct Decompressor<'a> { /* fields omitted */ }
Expand description
Allows to decompress independently multiple blocks of data.
This reduces memory usage compared to calling decompress
multiple times.
Implementations
pub fn with_prepared_dictionary<'b>(
dictionary: &'a DecoderDictionary<'b>
) -> Result<Self> where
'b: 'a,
pub fn with_prepared_dictionary<'b>(
dictionary: &'a DecoderDictionary<'b>
) -> Result<Self> where
'b: 'a,
Creates a new decompressor using an existing DecoderDictionary
.
Note that using a dictionary means that compression will need to use the same dictionary.
Changes the dictionary used by this decompressor.
Will affect future compression jobs.
Note that using a dictionary means that compression will need to use the same dictionary.
pub fn set_prepared_dictionary<'b>(
&mut self,
dictionary: &'a DecoderDictionary<'b>
) -> Result<()> where
'b: 'a,
pub fn set_prepared_dictionary<'b>(
&mut self,
dictionary: &'a DecoderDictionary<'b>
) -> Result<()> where
'b: 'a,
Changes the dictionary used by this decompressor.
Note that using a dictionary means that compression will need to use the same dictionary.
Deompress a single block of data to the given destination buffer.
Returns the number of bytes written, or an error if something happened (for instance if the destination buffer was too small).
Decompress a block of data, and return the result in a Vec<u8>
.
The decompressed data should be less than capacity
bytes,
or an error will be returned.
Sets a decompression parameter for this decompressor.
Sets the maximum back-reference distance.
The actual maximum distance is going to be 2^log_distance
.
This will need to at least match the value set when compressing.
Get an upper bound on the decompressed size of data, if available
This can be used to pre-allocate enough capacity for decompress_to_buffer
and is used by decompress
to ensure that it does not over-allocate if
you supply a large capacity
.
Will return None
if the upper bound cannot be determined or is larger than usize::MAX
Note that unless the experimental
feature is enabled, this will always return None
.
Trait Implementations
Returns the “default value” for a type. Read more