NEWS

---

yyjsonr 2026-04-05

• C-API: Address non-API call Rf_findVarInFrame()
• Geojson: Feature level IDs are now parsed correctly.
• yyjson: Include latest yyjson version 0.12.0
• yyjson: Expose new yyjson_read_flag options for JSON5 parsing
• opts: Added parse option for empty_array and empty_object. See opts_read_json()
• opts: Add null option when serializing. Now defaults to using JSON "null" where previously had defaulted erroneously to an empty json array. See opts_write_json()
• compat: switch from gzfread() to gzread() for centOS compatability.
• feature: Add read_geojson_conn() to handle geonjson from an R connection object
• opts: Added option arr_of_arrs_to_matrix. Logical value to control if conforming JSON []-arrays of nested []-arrays should be converted to matrices.
• Fix: Added support for raw nested data.frames (which are not in list-columns)
• Fix: ndjson error with zero-length input when parsing to data.frame. Now returns empty data.frame(). This matches the parsing of ndjson to lists, where zero-length input is not an error, and just returns empty lists.
• Fix: segfault in parse_ndjson_str_as_df_. Now freeing allocated colnames when error occurs
• Fix: free yyjson doc on error in geojson parse
• C-API: Removed support for UnboundValues when serializing environments

yyjsonr 2025-06-03

• Now get size of gzipped file in an endian-neutral way. Issue #39
• Fix underflow issue when trying to verbosely report an error at position 0
• Remove non-API calls: SETLENGTH, SET_TRUELENGTH, SET_GROWABLE_BIT
• Address valgrind/rchk errors
• Depends on R >= 4.1.0 (using new pipe and lambda syntax in examples)
• Opts: Added digits_secs to control conversion of POSIXct datetimes with fractional seconds
• Opts: Added digits_signif to control significant digits in numeric representation
• Support YYJSON_READ_NUMBER_AS_RAW to read all numbers as strings
• Opts: Add digits_promote to control decimal places when numbers in JSON []-arrays are promoted to strings.
• Opts: Add json_verbatim to write strings (with class "json") directly into the output
• Opts: Add single_null to specify R value to use for single JSON null values
• Add raw IO for json, ndjson
• Update to yyjson v0.11.1 (May 2025)

yyjsonr 2024-04-10

• Fix outstanding rchk errors

• Prepare for CRAN

yyjsonr 2024-04-09

• Fix some compilation warnings.
• Update documentation.
• Update to yyjson v0.9.0

yyjsonr 2024-04-02

• Bug fix for serializing NA in factors

yyjsonr 2024-03-16

• Re-introduce GeoJSON support

yyjsonr 2024-03-15

• Re-introduce NDJSON support
• Add read_ndjson_str()

yyjsonr 2024-03-13

• call normalizePath() on all file paths
• clarify authorship and copyright

yyjsonr 2024-03-07

• Increase maximum number of allowed data.frame columns (during parsing) to 2048

yyjsonr 2024-02-01

• Read JSON from '.gz' files in read_json_file()

yyjsonr 2024-01-25

• New fast_numerics flag when writing.
  • Default FALSE
  • If TRUE the user is guaranteeing that there are no NA, NaN or Inf values in the numeric and integer vectors, and thus a faster method for writing these vectors to JSON can be used.
• Changed writing of raw vectors to always use the fast_numerics method, as raw R vectors (by definition) will not have NA, NaN or Inf values.

yyjsonr 2024-01-22

• Fixes for CRAN
  • Adjust pointer arithmetic when calling output_verbose_error() to avoid overflow of size_t

yyjsonr 2024-01-20

• Fixes for CRAN
  • Fixed warnings when building with MAKEVARS PKG_CFLAGS = -Wconversion
  • Fixed C error where raw buffer was passed to strlen() leading to a check failure on cran with clang-ASAN

yyjsonr 2024-01-17

• Fixes for CRAN
  • DESCRIPTION fix: Write C as 'C'
  • Add link to original yyjson library
  • Fix name in LICENSE

yyjsonr 2024-01-15

• Fixes for CRAN
  • Simplify example to remove checkRd NOTE
  • Platform specific handling of error location format string to fix WARNING

yyjsonr 2024-01-13

• Add int64 = "double" option to opts_read_json()
• Preparations for CRAN

yyjsonr 2024-01-05

• Remove NDJSON and GeoJSON code to simplify preparation for CRAN. Will re-introduce this code in future releases.
• Updated to YYJSON v0.8.0

yyjsonr 2023-10-29

• Fix an off-by-one error when reporting line numbers in NDJSON handling.
• Increase buffer size when reading lines from NDJSON files.
  • MAX_LINE_LENGTH now 131072 (was 10000)

yyjsonr 2023-10-27

• Writing to JSON objects now supports a digits argument for rounding floating point values to the specified number of significant digits
  • digits = -1 means don't do any rounding
  • digits = 0 rounds floating point values to integers (and writes the values as JSON integers)

yyjsonr 2023-09-14

• Refactored options for simplification to data.frame
  • removed vectors_to_df
  • replaced with obj_of_arrs_to_df
  • added arr_of_obs_to_df
• length-1 vectors marked with class AsIs (using a call to I()) will never be unboxed i.e. will always be serialized as a JSON []-array with one element.
• Added parse option length1_array_asis. If TRUE then automatically add the class AsIs to the object object.

yyjsonr 2023-09-13

• Added pre-calculation and caching of data.frame column types for faster serialization when outputting row-by-row.

yyjsonr 2023-09-12

• Added path.expand() when handling filenames. Thanks to
  • https://github.com/shikokuchuo
  • https://github.com/hrbrmstr
• Added support for data.frames without column names to match behaviour of jsonlite (when working within the plotly package)

yyjsonr 2023-09-10

• Unifed naming scheme

yyjsonr 2023-09-04

• FEATURE: Added promote_num_to_string in opts_read_json() to enable forced promotion of numerics to string
• BUGFIX: fixes for handling of geometry collection when reading and writing.
• TESTING: More tests included for output to geojson
• TESTING: Refactored testing of 'sf' objects

yyjsonr 2023-08-31

• Bug fix for checking attributes on list columns. This surfaced more errors to do with setting XYZ geometry type.
• More extensive testing of write_geojson_str()

yyjsonr 2023-08-27

• Initial alpha GeoJSON support:
  • read_geojson_str(), read_geojson_file()
    • Needs more testing for corner cases
  • write_geojson_str(), write_geojson_file()
    • At a very alpha stage.

yyjsonr 2023-08-21

• Added validate_json_file() and validate_json_str()

yyjsonr 2023-08-20

• Added write_ndjson_file() and write_ndjson_str()

yyjsonr 2023-08-19

• Update to option setting to remove overhead
• Added read_json_raw() to parse JSON directly from a raw vector (which contains UTF-8 string data)

yyjsonr 2023-08-16

• Initial release