No API changes.

Lua 5.3 support has been improved: LUA_COMPAT_MATLIB is no longer required, although if you have it, vstruct will use the faster builtin math.frexp for floating-point operations rather than a slower Lua-only version.

Fixes

• Several of the rockspecs had incorrect version bounds. These have now been fixed.

New features

• when invoking the random test generator, you can now pass multiple test kinds on the command line, e.g. lua test.lua NROF_TESTS=8192 read write to run both read and write tests.
• passing DISABLE_FREXP as the first argument to test.lua will cause it to disable the builtin math.frexp for all tests, and run them with the lua-only version

No API changes.

This version supports Lua 5.3 (and retains support for lua 5.1, 5.2, and luajit). Lua 5.3 support requires it to have been compiled with LUA_COMPAT_MATHLIB defined.

• Added some basic performance tests
• Dramatically improved performance when packing large arrays into strings
• Moved the contents of ./vstruct/ into ./; this directory structure originally existed to support luadist, but made it harder for non-luadist users to install
• LuaRocks support (thanks to @deepakjois)

This is an enhancement release.

THIS RELEASE BREAKS BACKWARDS COMPATIBILITY. See README.md for details. In most cases migrating existing code to 2.0 should be trivial.

New in 2.0:

• Major internal redesign and refactoring.
• API uses read/write instead of pack/unpack.
• Compiled format strings behave slightly differently.
• Added vstruct.records() iterator.
• Added vstruct.register() and format string splicing.
• Improved test coverage.
• Improved error reporting for invalid arguments to API functions.

This is a bugfix release. If you use format p or pass non-integer values to formats i or u you should upgrade to this version to fix potentially serious bugs in these formats.

• Fixed a bug where certain non-integer values passed to format p, i, or u can crash the library outright or cause it to silently write incorrect data. The root cause was an incorrect assumption that string.char would truncate rather than rounding.
• Improvements to documentation and unit tests.

This is an enhancement release.

New in this version:

• x format extended to permit padding with a specific value: "x8,15" writes 8 bytes of 0x0F.
• Improved error reporting for compile and runtime errors.
• Improved test coverage, especially for error reporting.
• README now uses markdown.
• Documentation updates and clarification.