{-# LANGUAGE BangPatterns #-} {-# LANGUAGE CApiFFI #-} {-# LANGUAGE MagicHash #-} {-# LANGUAGE UnboxedTuples #-} {-# LANGUAGE UnliftedFFITypes #-} {-# LANGUAGE DeriveDataTypeable #-} {-# LANGUAGE GHCForeignImportPrim #-} {-# LANGUAGE CPP #-} {-# LANGUAGE StandaloneDeriving #-} {-# LANGUAGE NoImplicitPrelude #-} #include "MachDeps.h" -- | -- Module : GHC.Integer.GMP.Internals -- Copyright : (c) Herbert Valerio Riedel 2014 -- License : BSD3 -- -- Maintainer : ghc-devs@haskell.org -- Stability : provisional -- Portability : non-portable (GHC Extensions) -- -- This modules provides access to the 'Integer' constructors and -- exposes some highly optimized GMP-operations. -- -- Note that since @integer-gmp@ does not depend on `base`, error -- reporting via exceptions, 'error', or 'undefined' is not -- available. Instead, the low-level functions will crash the runtime -- if called with invalid arguments. -- -- See also -- <https://ghc.haskell.org/trac/ghc/wiki/Commentary/Libraries/Integer GHC Commentary: Libraries/Integer>. module GHC.Integer.GMP.Internals ( -- * The 'Integer' type Integer(..) , isValidInteger# -- ** Basic 'Integer' operations , module GHC.Integer -- ** Additional 'Integer' operations , gcdInteger , gcdExtInteger , lcmInteger , sqrInteger , powModInteger , powModSecInteger , recipModInteger -- ** Additional conversion operations to 'Integer' , wordToNegInteger , bigNatToInteger , bigNatToNegInteger -- * The 'BigNat' type , BigNat(..) , GmpLimb, GmpLimb# , GmpSize, GmpSize# -- ** , isValidBigNat# , sizeofBigNat# , zeroBigNat , oneBigNat , nullBigNat -- ** Conversions to/from 'BigNat' , byteArrayToBigNat# , wordToBigNat , wordToBigNat2 , bigNatToInt , bigNatToWord , indexBigNat# -- ** 'BigNat' arithmetic operations , plusBigNat , plusBigNatWord , minusBigNat , minusBigNatWord , timesBigNat , timesBigNatWord , sqrBigNat , quotRemBigNat , quotRemBigNatWord , quotBigNatWord , quotBigNat , remBigNat , remBigNatWord , gcdBigNat , gcdBigNatWord , powModBigNat , powModBigNatWord , recipModBigNat -- ** 'BigNat' logic operations , shiftRBigNat , shiftLBigNat , testBitBigNat , clearBitBigNat , complementBitBigNat , setBitBigNat , andBigNat , xorBigNat , popCountBigNat , orBigNat , bitBigNat -- ** 'BigNat' comparison predicates , isZeroBigNat , isNullBigNat# , compareBigNatWord , compareBigNat , eqBigNatWord , eqBigNatWord# , eqBigNat , eqBigNat# , gtBigNatWord# -- * Miscellaneous GMP-provided operations , gcdInt , gcdWord , powModWord , recipModWord -- * Primality tests , testPrimeInteger , testPrimeBigNat , testPrimeWord# , nextPrimeInteger , nextPrimeBigNat , nextPrimeWord# -- * Import/export functions -- ** Compute size of serialisation , sizeInBaseBigNat , sizeInBaseInteger , sizeInBaseWord# -- ** Export , exportBigNatToAddr , exportIntegerToAddr , exportWordToAddr , exportBigNatToMutableByteArray , exportIntegerToMutableByteArray , exportWordToMutableByteArray -- ** Import , importBigNatFromAddr , importIntegerFromAddr , importBigNatFromByteArray , importIntegerFromByteArray ) where import GHC.Integer.Type import GHC.Integer import GHC.Prim import GHC.Types default () -- | Compute number of digits (without sign) in given @/base/@. -- -- This function wraps @mpz_sizeinbase()@ which has some -- implementation pecularities to take into account: -- -- * \"@'sizeInBaseInteger' 0 /base/ = 1@\" -- (see also comment in 'exportIntegerToMutableByteArray'). -- -- * This function is only defined if @/base/ >= 2#@ and @/base/ <= 256#@ -- (Note: the documentation claims that only @/base/ <= 62#@ is -- supported, however the actual implementation supports up to base 256). -- -- * If @/base/@ is a power of 2, the result will be exact. In other -- cases (e.g. for @/base/ = 10#@), the result /may/ be 1 digit too large -- sometimes. -- -- * \"@'sizeInBaseInteger' /i/ 2#@\" can be used to determine the most -- significant bit of @/i/@. -- -- @since 0.5.1.0 sizeInBaseInteger :: Integer -> Int# -> Word# sizeInBaseInteger (S# i#) = sizeInBaseWord# (int2Word# (absI# i#)) sizeInBaseInteger (Jp# bn) = sizeInBaseBigNat bn sizeInBaseInteger (Jn# bn) = sizeInBaseBigNat bn -- | Version of 'sizeInBaseInteger' operating on 'BigNat' -- -- @since 1.0.0.0 sizeInBaseBigNat :: BigNat -> Int# -> Word# sizeInBaseBigNat bn@(BN# ba#) = c_mpn_sizeinbase# ba# (sizeofBigNat# bn) foreign import ccall unsafe "integer_gmp_mpn_sizeinbase" c_mpn_sizeinbase# :: ByteArray# -> GmpSize# -> Int# -> Word# -- | Version of 'sizeInBaseInteger' operating on 'Word#' -- -- @since 1.0.0.0 foreign import ccall unsafe "integer_gmp_mpn_sizeinbase1" sizeInBaseWord# :: Word# -> Int# -> Word# -- | Dump 'Integer' (without sign) to @/addr/@ in base-256 representation. -- -- @'exportIntegerToAddr' /i/ /addr/ /e/@ -- -- See description of 'exportIntegerToMutableByteArray' for more details. -- -- @since 1.0.0.0 exportIntegerToAddr :: Integer -> Addr# -> Int# -> IO Word exportIntegerToAddr (S# i#) = exportWordToAddr (W# (int2Word# (absI# i#))) exportIntegerToAddr (Jp# bn) = exportBigNatToAddr bn exportIntegerToAddr (Jn# bn) = exportBigNatToAddr bn -- | Version of 'exportIntegerToAddr' operating on 'BigNat's. exportBigNatToAddr :: BigNat -> Addr# -> Int# -> IO Word exportBigNatToAddr bn@(BN# ba#) addr e = c_mpn_exportToAddr# ba# (sizeofBigNat# bn) addr 0# e foreign import ccall unsafe "integer_gmp_mpn_export" c_mpn_exportToAddr# :: ByteArray# -> GmpSize# -> Addr# -> Int# -> Int# -> IO Word -- | Version of 'exportIntegerToAddr' operating on 'Word's. exportWordToAddr :: Word -> Addr# -> Int# -> IO Word exportWordToAddr (W# w#) addr = c_mpn_export1ToAddr# w# addr 0# -- TODO: we don't calling GMP for that foreign import ccall unsafe "integer_gmp_mpn_export1" c_mpn_export1ToAddr# :: GmpLimb# -> Addr# -> Int# -> Int# -> IO Word -- | Dump 'Integer' (without sign) to mutable byte-array in base-256 -- representation. -- -- The call -- -- @'exportIntegerToMutableByteArray' /i/ /mba/ /offset/ /msbf/@ -- -- writes -- -- * the 'Integer' @/i/@ -- -- * into the 'MutableByteArray#' @/mba/@ starting at @/offset/@ -- -- * with most significant byte first if @msbf@ is @1#@ or least -- significant byte first if @msbf@ is @0#@, and -- -- * returns number of bytes written. -- -- Use \"@'sizeInBaseInteger' /i/ 256#@\" to compute the exact number of -- bytes written in advance for @/i/ /= 0@. In case of @/i/ == 0@, -- 'exportIntegerToMutableByteArray' will write and report zero bytes -- written, whereas 'sizeInBaseInteger' report one byte. -- -- It's recommended to avoid calling 'exportIntegerToMutableByteArray' for small -- integers as this function would currently convert those to big -- integers in msbf to call @mpz_export()@. -- -- @since 1.0.0.0 exportIntegerToMutableByteArray :: Integer -> MutableByteArray# RealWorld -> Word# -> Int# -> IO Word exportIntegerToMutableByteArray (S# i#) = exportWordToMutableByteArray (W# (int2Word# (absI# i#))) exportIntegerToMutableByteArray (Jp# bn) = exportBigNatToMutableByteArray bn exportIntegerToMutableByteArray (Jn# bn) = exportBigNatToMutableByteArray bn -- | Version of 'exportIntegerToMutableByteArray' operating on 'BigNat's. -- -- @since 1.0.0.0 exportBigNatToMutableByteArray :: BigNat -> MutableByteArray# RealWorld -> Word# -> Int# -> IO Word exportBigNatToMutableByteArray bn@(BN# ba#) = c_mpn_exportToMutableByteArray# ba# (sizeofBigNat# bn) foreign import ccall unsafe "integer_gmp_mpn_export" c_mpn_exportToMutableByteArray# :: ByteArray# -> GmpSize# -> MutableByteArray# RealWorld -> Word# -> Int# -> IO Word -- | Version of 'exportIntegerToMutableByteArray' operating on 'Word's. -- -- @since 1.0.0.0 exportWordToMutableByteArray :: Word -> MutableByteArray# RealWorld -> Word# -> Int# -> IO Word exportWordToMutableByteArray (W# w#) = c_mpn_export1ToMutableByteArray# w# foreign import ccall unsafe "integer_gmp_mpn_export1" c_mpn_export1ToMutableByteArray# :: GmpLimb# -> MutableByteArray# RealWorld -> Word# -> Int# -> IO Word -- | Probalistic Miller-Rabin primality test. -- -- \"@'testPrimeInteger' /n/ /k/@\" determines whether @/n/@ is prime -- and returns one of the following results: -- -- * @2#@ is returned if @/n/@ is definitely prime, -- -- * @1#@ if @/n/@ is a /probable prime/, or -- -- * @0#@ if @/n/@ is definitely not a prime. -- -- The @/k/@ argument controls how many test rounds are performed for -- determining a /probable prime/. For more details, see -- <http://gmplib.org/manual/Number-Theoretic-Functions.html#index-mpz_005fprobab_005fprime_005fp-360 GMP documentation for `mpz_probab_prime_p()`>. -- -- @since 0.5.1.0 {-# NOINLINE testPrimeInteger #-} testPrimeInteger :: Integer -> Int# -> Int# testPrimeInteger (S# i#) = testPrimeWord# (int2Word# (absI# i#)) testPrimeInteger (Jp# n) = testPrimeBigNat n testPrimeInteger (Jn# n) = testPrimeBigNat n -- | Version of 'testPrimeInteger' operating on 'BigNat's -- -- @since 1.0.0.0 testPrimeBigNat :: BigNat -> Int# -> Int# testPrimeBigNat bn@(BN# ba#) = c_integer_gmp_test_prime# ba# (sizeofBigNat# bn) foreign import ccall unsafe "integer_gmp_test_prime" c_integer_gmp_test_prime# :: ByteArray# -> GmpSize# -> Int# -> Int# -- | Version of 'testPrimeInteger' operating on 'Word#'s -- -- @since 1.0.0.0 foreign import ccall unsafe "integer_gmp_test_prime1" testPrimeWord# :: GmpLimb# -> Int# -> Int# -- | Compute next prime greater than @/n/@ probalistically. -- -- According to the GMP documentation, the underlying function -- @mpz_nextprime()@ \"uses a probabilistic algorithm to identify -- primes. For practical purposes it's adequate, the chance of a -- composite passing will be extremely small.\" -- -- @since 0.5.1.0 {-# NOINLINE nextPrimeInteger #-} nextPrimeInteger :: Integer -> Integer nextPrimeInteger (S# i#) | isTrue# (i# ># 1#) = wordToInteger (nextPrimeWord# (int2Word# i#)) | True = S# 2# nextPrimeInteger (Jp# bn) = Jp# (nextPrimeBigNat bn) nextPrimeInteger (Jn# _) = S# 2# -- | Version of 'nextPrimeInteger' operating on 'Word#'s -- -- @since 1.0.0.0 foreign import ccall unsafe "integer_gmp_next_prime1" nextPrimeWord# :: GmpLimb# -> GmpLimb#