luajit-gmp's Introduction

Features

Full support of 5.1.2 API (except low-level functions)

Example code

  local gmp = require 'gmp' ('libgmp-10')

  local mpz = gmp.types.z

  local a,b = mpz(), mpz()

  gmp.z_init_set_str(a, '39679054966380032223487239670184', 10)
  gmp.z_init_set_str(b, '85186439059104575627262464195387', 10)

  gmp.z_mul(a,a,b)

  gmp.printf('Result: %Zd\n', a)

  gmp.z_clears(a,b)

Differences from the C API

Binding is so close to the original API as possible, but some things still differ.

Names lost 'gmp' prefix as not needed.
f_get_d_2exp, f_get_str return exp as second result.
Added luasprintf, for formatted output in lua string.

TODO

Wrap mpz_import and mpz_export functions

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noa

luajit-gmp's Issues

get_str functions leak memory

Hi,

It seems that there is a memory leak in all get_str functions.

In ffi interface there is a need to have a function which will free memory like the following:

void str_free(char *);

and for example z_get_str function instead of:

function mod.z_get_str(str, base, op)
return ffi.string(bind.__gmpz_get_str(str, base, op))
end

must be changed to

function mod.z_get_str(str, base, op)
local c_str = bind.__gmpz_get_str(str, base, op)
local s = ffi.string(c_str)
bind.str_free(c_str)
return s
end

Hope this helps. Thanks!

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