v3.7.0

CHANGES:

• Improve performance by not doing redundant bounds checks
  in both the Bigarray and Cstruct level (#236 @Reperator @chambart)
• Ignore fields starting wih _ by skipping code generation
  but still respecting the space usage of that field. This was
  a convention before but is now enforced by the code generator
  to save space in the output (#233 @emillon)
• More warnings suppression for sizeof and enums (#231 @emillon)

v3.6.0

CHANGES:

• A [%%cstruct type ...] declaration generates many values that
  are potentially unused. The code generator in ppx_cstruct now
  guarantees that there will be no more "unused value" (warning 32)
  statements from use of the ppx form. (#228 @emillon)
• Actually run the ppx tests instead of just building them.
  (#227 @emillon to fix #226 from @XVilka)

v3.5.0

CHANGES:

• Remove trailing spaces in hexdump output (#219 @emillon)
• Add Cstruct.rev to allocate a reversed cstruct (#221 @emillon)
• Cstruct_unix now uses the post-OCaml 4.06 Unix.map_file
  instead of the deprecated Bigarray map_file that was removed
  in OCaml 4.08 (@avsm, see ocaml/ocaml#2263)
• Remove unnecessary (wrapped false) in the build system (@avsm)
• Correct ocamldoc to the right cstruct-ppx package pointer (@avsm)

v3.4.0

CHANGES:

• Remove old compatibility packages for cstruct.lwt, cstruct.async,
  cstruct.ppx and cstruct.unix. These were deprecated in
  cstruct.3.0.0 in favour of counter part libraries with a dash
  in the name (cstruct-lwt, cstruct-async, cstruct.unix)
  or ppx_cstruct for the PPX extension. (@avsm)

v3.3.0

CHANGES:

• Support for bi-endian cstructs that generate both sets of accessor
  functions (#212 by @XVilka). This generates both BE and LE
  modules to use as needed.

• Modify of_string and of_bytes to have an option ?off
  offset argument into the source bytes. (#208 by @XVilka)

• Improve tests to work on 32-bit architectures and handle
  Gc better (@samoht)

• Do not depend explicitly on deprecated ppx_driver. This was
  primarily there for older compilers, and new uses should be
  based around ppxlib. (#201 by @edwintorok).

• Upgrade opam metadata to 2.0 format. (#217 by @XVilka @avsm)

• Upgrade to dune from jbuilder and support dune-release instead
  of topkg (@avsm)

v3.2.1

v3.2.1 2017-12-13

• improve performance by using primitives instead of C stubs. the performance
  regression was introduced in #177 in 3.2.0 (#195 by @pqwy)

Fixes and additional APIs

• wrap hexdump_pp output in a box (#175 by @cfcs)
• remove dependency on ocplib-endian (#177 by @hannesm)
• add of_hex: string -> t (#179 by @hannesm and @pqwy)
• add to_bytes: t -> Bytes.t (#183 by @hannesm)
• add empty: t (#184 by @hannesm)
• sub: check the bounds more carefully for overflow (#185 by @hannesm)
• cstruct-unix: fix the build on OCaml 4.06.0 (#187 by @djs55)
• travis: test OCaml 4.04.2 and 4.06.0 (#186 by @hannesm)

Improve Windows support

• check_alignment now treats a large alignment as an unsigned value
  and so doesnt raise a signal (#171 by @yallop)
• Improve Windows support by avoiding void * pointer arithmetic and
  have more portable headers in the C stubs (#170 by @fdopen)

More bounds checking against integer overflows

• Fix arithmetic overflow in Cstruct.lenv and copyv (#159 by @yallop)
• Reject negative destination offsets in blit (#160 by @yallop)
• Add AFL fuzz tests using Crowbar, which independently discovered
  #160 and also an overflow in of_bigarray and sub, now bith
  fixed (#164 by @talex5)
• Improve performance of several allocation functions by eliminating an
  unnecessary buffer zero step (#158 by @hannesm)
• Compile the source tree with stricter flags, including dead variable
  detection and deprecation warnings (#157 by @samoht)
• Bump the required minimum OCaml version up to 4.03.0 (due to #157).

fix the cstruct-async package build

• fix the cstruct-async package build, and depend on the latest
  Async packages (>="v0.9.0") as part of this. (#152 @jnfoster)