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  • fixed division by zero in rotations of 0-length vectors (reported by Nikolaus Huber)
  • fixed integer overflows in bound tests in fill, blit, sub (fix by Nikolaus Huber)

2.0 (18/05/2024)

  • Switch to bytes-based implementation. This is simpler and faster (up to 30% faster). Bitv_string is still there but deprecated (now identical to Bitv).
  • Functions to_int... do not fail anymore when bit vectors are small (and behave as if high bits are zero).
  • New function tanimoto (Tanimoto score) (contribution by François Berenger)

1.6 (06/02/2021)

  • fixed build on 32-bit platforms e.g. js_of_ocaml (patch from Tim Bourke)
  • added exceeds_max_length to replace max_length (deprecated)

1.5 (30/01/2021)

  • new functions rotatel and rotater (patch from Tim Bourke)

1.4 (02/08/2020)

  • switch to dune build system, and opam 2.0
  • add to/of_bytes for machine-independant serialisation
  • fix binary serialisation when vector is larger than 2^32

1.3 (14/12/2017)

  • fix compilation for OCaml 4.06 (safe-string)

1.2 (10/02/2017)

  • added pop (population count, i.e., number of 1 bits)
  • suppressed some warnings with OCaml >= 4.00

1.1 (10/04/2013)

  • installation using ocamlfind (if found) or in ocamlc -where/bitv otherwise
  • fixed of_int64_(u)s on a 32-bit architecture (thanks to Florent Monnier)

1.0 (14/08/2012)

  • functions to/of_int64_s
  • new functions output_bin/input_bin for export/import in a machine-independent way (contribution from Bruno Guillaume)
  • fixed installation (patch from Bruno Guillaume)

0.9 (20/06/2012)

  • fixed tarball (test.ml was missing)
  • patched installation to use $(DESTDIR), if any (patch from Bruno Guillaume)

0.8 (28/02/2012)

  • two different modules L and M for conversions to and from string (least and most significant bits first, respectively); apologies for API incompatibility
  • improved implementation of iteri_true

0.7 (03/04/2008)

  • fixed bug with unsafe_blit when len=0 (could affect blit, sub, append, concat and fill when used with 0-length bit vectors), thanks to Pat Rondon

0.6 (18/02/2005)

  • added iteri_true
  • added foldi_left and foldi_right
  • patch for ocaml >= 3.08 (0xffffffff is no more accepted as a literal)
  • fixed Invalid_argument messages (now exactly the function name)

0.5 (22/11/2002)

  • added print : formatter -> t -> unit
  • from_list now fails on negative indexes (patch from Karl Zilles)
  • from_list_with_length to specify the length (patch from Karl Zilles)

0.4 (29/8/2002)

  • to_list/from_list to convert to/from lists of integers
  • added gray_iter to iterate over all bit vectors of length n
  • configuration with autoconf

0.3 (31/5/2000)

  • fixed bug in bw_not thanks to Damir Jamsek

0.2 (24/4/2000)

  • normalization, so that generic equality can be used
  • efficient implementations of append, sub, blit, concat and fill
  • documentation using ocamlweb
  • to_string, from_string
  • bitwise operations, all_zeros

0.1

  • first release