Crate zstd_safe

Minimal safe wrapper around zstd-sys.

This crates provides a minimal translation of the zstd-sys methods. For a more comfortable high-level library, see the zstd crate.

Most of the functions here map 1-for-1 to a function from the C zstd library mentioned in their descriptions. Check the source documentation for more information on their behaviour.

Features denoted as experimental in the C library are hidden behind an experimental feature.

Re-exports

• pub use zstd_sys;

Structs

• CCtx
  Compression context
• CDict
  Compression dictionary.
• ContentSizeError
  Indicates an error happened when parsing the frame content size.
• DCtx
  A Decompression Context.
• DDict
  A digested decompression dictionary.
• InBuffer
  Wrapper around an input buffer.
• OutBuffer
  Wrapper around an output buffer.

Enums

• CParameter
  A compression parameter.
• DParameter
  A decompression parameter.
• DictAttachPrefexperimental
• FrameFormatexperimental
• ParamSwitchexperimental
• ResetDirective
  What kind of context reset should be applied.
• Strategy
  How to compress data. Advanced compression API (Requires v1.4.0+)

Constants

• BLOCKSIZELOG_MAX
• BLOCKSIZE_MAX
• BLOCKSIZE_MAX_MIN
• CHAINLOG_MAX_32
• CHAINLOG_MAX_64
• CHAINLOG_MIN
• CLEVEL_DEFAULT
• CONTENTSIZE_ERROR
• CONTENTSIZE_UNKNOWN
• FRAMEHEADERSIZE_MAX
• HASHLOG_MIN
• LDM_BUCKETSIZELOG_MAX
• LDM_BUCKETSIZELOG_MIN
• LDM_HASHLOG_MIN
• LDM_HASHRATELOG_MIN
• LDM_MINMATCH_MAX
• LDM_MINMATCH_MIN
• MAGICNUMBER
• MAGIC_DICTIONARY
• MAGIC_SKIPPABLE_MASK
• MAGIC_SKIPPABLE_START
• MINMATCH_MAX
• MINMATCH_MIN
• OVERLAPLOG_MAX
• OVERLAPLOG_MIN
• SEARCHLOG_MIN
• SKIPPABLEHEADERSIZE
• SRCSIZEHINT_MIN
• TARGETCBLOCKSIZE_MAX
• TARGETCBLOCKSIZE_MIN
• TARGETLENGTH_MAX
• TARGETLENGTH_MIN
• VERSION_MAJOR
• VERSION_MINOR
• VERSION_NUMBER
• VERSION_RELEASE
• WINDOWLOG_LIMIT_DEFAULT
• WINDOWLOG_MAX_32
• WINDOWLOG_MAX_64
• WINDOWLOG_MIN

Traits

• WriteBuf
  Describe a resizeable bytes container like Vec<u8>.

Functions

• compress
  Wraps the ZSTD_compress function.
• compress_bound
  Maximum compressed size in worst case single-pass scenario
• compress_using_cdict
  Wraps the ZSTD_compress_usingCDict() function.
• create_cdict
  Wraps the ZSTD_createCDict() function.
• create_cstream
  Allocates a new CStream.
• create_ddict
  Wraps the ZSTD_createDDict() function.
• decompress
  Wraps the ZSTD_decompress function.
• decompress_boundexperimental
  Wraps the ZSTD_decompressBound function
• decompress_using_ddict
  Wraps the ZSTD_decompress_usingDDict() function.
• decompression_marginexperimental
  Returns the minimum extra space when output and input buffer overlap.
• find_decompressed_sizeexperimental
  Wraps the ZSTD_findDecompressedSize() function.
• find_frame_compressed_size
  Wraps the ZSTD_findFrameCompressedSize() function.
• get_block_sizeexperimental
  Wraps the ZSTD_getBlockSize() function.
• get_decompressed_sizeDeprecated
  Wraps the ZSTD_getDecompressedSize function.
• get_dict_idzdict_builder
  Wraps the ZDICT_getDictID() function.
• get_dict_id_from_dict
  Wraps the ZSTD_getDictID_fromDict() function.
• get_dict_id_from_frame
  Wraps the ZSTD_getDictID_fromFrame() function.
• get_error_name
  Returns the error string associated with an error code.
• get_frame_content_size
  Wraps the ZSTD_getFrameContentSize() function.
• init_cstream
  Prepares an existing CStream for compression at the given level.
• is_frameexperimental
  Wraps the ZSTD_isFrame() function.
• max_c_level
  Returns the maximum (slowest) compression level supported.
• min_c_level
  Returns the minimum (fastest) compression level supported.
• sequence_boundexperimental
  Given a buffer of size src_size, returns the maximum number of sequences that can ge generated.
• train_from_bufferzdict_builder
  Wraps the ZDICT_trainFromBuffer() function.
• version_number
  Returns the ZSTD version.
• version_string
  Returns a string representation of the ZSTD version.

Type Definitions

• CStream
  Compression stream.
• CompressionLevel
  Represents the compression level used by zstd.
• DStream
  A Decompression stream.
• ErrorCode
  Represents a possible error from the zstd library.
• SafeResult
  Wrapper result around most zstd functions.