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ChangeLog
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Version 0.25.3 (2022-2-20)
* Update zstd to 1.5.2 and single file library
* Use of Rcpp strict headers; this and the above improve compilation speed considerably
* Use more accurate language in configure script (request from CRAN)
Version 0.25.2 (2021-12-6)
* Update documentation and fix typos (thanks to @salim-b)
* Update autoconf to version 2.6.9 (autoupdate; autoreconf --warnings=obsolete)
* Include tests/ folder in build/check process
* Add `encode_source` and `decode_source` -- helper functions for inlining files and documents
Version 0.25.1 (2021-7-20)
* Add `qcache` helper function
* Remove immediate binding expansion, as it is not part of the R API (comments from CRAN/Luke Tierney). Instead, use the `findVarsInFrame` function to extract immediate bindings from environments.
* Remove `R_restoreHashCount` function, as it is not part of the new R API
Version 0.24.4 (2021-3-13)
* Throw a proper error message for DBFS issues (https://github.com/traversc/qs/issues/51)
Version 0.24.3 (2021-3-8)
* Add github actions to test compilation on different R versions
Version 0.24.1 (2021-3-5)
* Add additional error checks on failure to read or write data
* Update xxhash version to 0.8.0
* Reduce R version requirement from R 3.5.0 to R 3.0.2 (https://github.com/traversc/qs/pull/36)
Version 0.23.6 (2020-2-7)
* Add BNDCELLS (aka immediate bindings) support added in R 4.0 (https://github.com/traversc/qs/issues/50)
Version 0.23.5 (2020-12-9)
* Correct issue in `qsavem` function (https://github.com/traversc/qs/issues/46)
Version 0.23.4 (2020-10-8)
* Correct documentation of `qreadm` and `qsavem` functions (https://github.com/traversc/qs/issues/44)
Version 0.23.3 (2020-9-24)
* Fix to https://github.com/traversc/qs/issues/43
Version 0.23.1 (2020-7-14)
* Fix to `qsavem` / `qload` functions (https://github.com/traversc/qs/issues/39)
* Update xxhash bundled library to v0.7.4
Version 0.22.1 (2020-5-31)
* Added `qsavem` and `qload`/`qreadm` functions for saving and reading multiple objects at once. Thanks to Bryce Chamberlain (https://github.com/traversc/qs/pull/36)
* `qs` now depends on R 3.5 and later. For earlier versions of R, use `remotes::install_github("traversc/qs@legacy")`
* Improved alt-rep string functionality using the stringfish package (https://cran.r-project.org/package=stringfish)
Version 0.21.2 (2020-3-8)
* Added implementations of base 85 and base 91 ASCII encoding. See `?base91_encoding` and `?base85_encoding`
* Fixed a typo in the benchmarking code (https://github.com/traversc/qs/issues/32) and updated the readme benchmark to the latest version
* Added a more descriptive error when trying to read a non-existent file (https://github.com/traversc/qs/pull/34)
* Compile LZ4 library in C++ instead of C to avoid U.B. issue (https://github.com/lz4/lz4/issues/847)
Version 0.21.1 (2020-2-6)
* Fix for active bindings in R6/environments (https://github.com/traversc/qs/issues/29)
* Correct several documentation errors (https://github.com/traversc/qs/issues/28)
* Fix for incorrect serialization of "names" attribute in S4 Raster class (https://github.com/traversc/qs/issues/27)
Version 0.20.2 (2019-12-1)
* Fix to minor bug involving serialization of locked environments
Version 0.20.1 (2019-12-1)
* More efficient serialization of S4 objects, environments and other complex types (DOTSXP, PROMSXP, CLOSXP)
* Better support for S4 objects
* S4 object flags are now correctly serialized and de-serialized (previously, the flag was ignored)
* S4SXP (non-simple S4 objects with slots) are efficiently serialized, instead of previously relying on R serialization
Version 0.19.1 (2019-9-2)
* Exposed C++ API for use in other Rcpp packages and Rcpp scripts (https://github.com/traversc/qs/issues/18)
Version 0.18.4 (2019-8-22)
* Fixed an rchk issue with a missing `PROTECT` call during serialization
* Various code refactor and optimizations
Version 0.18.3 (2019-8-20)
* `qsave` now returns invisibly the number of bytes written to file
* Fixed an issue with deserialization of large S4 objects (https://github.com/traversc/qs/issues/14)
* Additional serialization and deserialization functions for advanced usage:
* `qserialize` and `qdeserialize` reads and writes objects in memory to raw vectors
* `qsave_fd` and `qread_fd` reads and write objects to file descriptors
* `qsave_handle` and `qread_handle` reads and writes objects to Windows HANDLE pointer (Windows only)
* `qread_ptr` reads objects from a void pointer
Version 0.18.2 (2019-7-19)
* Changed license to GPL-3 (https://github.com/traversc/qs/issues/13)
Version 0.18.1 (2019-7-14)
* Revised header format in order to include more information -- files created by 0.18.1 cannot by read by earlier versions
* Remove R version restriction. Previously, `qs` required R >= 3.5.0. R alt-rep functionality will not be used in earlier versions.
Version 0.17.3 (2019-7-8)
* Fixed unprotected variable issue found by rchk (https://github.com/kalibera/rchk)
Version 0.17.2 (2019-7-6)
* Remove `restrict` keyword from R source files due to Solaris CRAN checks
* Remove executable file permission from src/* files due to OSX CRAN detecting license files as executable
Version 0.17.1 (2019-6-24)
* Re-write of `qdump` function to output more information
* Added regression unit testing for previous versions (tests/regression_testing.R")
Version 0.16.3 (2019-6-21)
* Use hash checksums for checking file integrity using the `xxhash` library
* New parameter: `qsave` -- `check_hash`, computes a checksum on the serialized data
* New paramter: `qread` -- `strict`, throws an error if checksum does not pre-computed value
* `qdump` function reports checksums
* Performance optimizations -- use C interface directly rather than Rcpp containers
* About 180% serialization speed improvement for large lists (e.g., `as.list(runif(1e6))`)
* Removed `qinspect` function as checks are now performed within serialization functiosn directly
* Additional error checking for proper compression and serialization
* The goal is R should not crash even if a file is corrupted
Version 0.16.2 (2019-6-15)
* Added `Set_elt` method for alt-rep string class (https://github.com/traversc/qs/issues/9)
* Code cleanup:
* Additional error checking during compression and de-compression
* Use of RAII for protection stack handling
* Use of templates instead of function pointers for compression and decompression
* Moved some functions to qs_common.h as templates to avoid code redundancy
Version 0.16.1 (2019-5-15)
* Support for zstd streaming interface. As opposed to block compression routines, streaming compression offers better compression ratio but is not as fast
* Re-factor configure script to not be so messy
* Changed file suffixes in examples from "q" to "qs" (https://github.com/traversc/qs/issues/5)
* (Not included) brotli compression library was evaluated, but did not offer better performance compared to zstd on average
* Updated zstd to version 1.4.0 (from 1.3.8) and lz4 to 1.9.1 (from 1.8.2)
* Updated benchmarks to include zstd streaming interface and newer versions of zstd and lz4
* C++ macro compiler warnings fixed in zstd; this needs to be done every time zstd is updated (https://github.com/facebook/zstd/issues/1538)
Version 0.15.1 (2019-04-07)
* Initial multi-threading support using C++11 concurrency
* Added support for lz4HC (high compression lz4 variant, but slower compression)
* Additional error check handling to verify file integrity; see `qinspect` function
* Additional documentation and examples
* Normalize file paths before attempting to write or read (https://github.com/traversc/qs/issues/4)
* Added star name database from the International Astronomical Union; see `?starnames`
Version 0.14.1 (2019-03-03)
* Support for LZ4 compression codec
* Defined several compression presets: "fast", "balanced" and "high" which trade speed for compression ratio
* Byte shuffling routines adapted from the BLOSC library, for higher compression ratios
* Utility functions for compressing and decompressing raw data using zstd or lz4
Version 0.13.1 (2019-02-13)
* Added configure file to detect system installation of zstd
* Fixes to "undefined behavior" (C++ unaligned type casts)
Version 0.12 (2019-02-08)
* Initial CRAN release
* This package provides serialization of R objects through block compression with zstd
* Utilizes Alt-rep data to quickly de-serialize string data