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Diffstat (limited to 'contrib/libgmp/mpz/mul_ui.c')
-rw-r--r-- | contrib/libgmp/mpz/mul_ui.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/contrib/libgmp/mpz/mul_ui.c b/contrib/libgmp/mpz/mul_ui.c new file mode 100644 index 0000000..f1f7269 --- /dev/null +++ b/contrib/libgmp/mpz/mul_ui.c @@ -0,0 +1,64 @@ +/* mpz_mul_ui(product, multiplier, small_multiplicand) -- Set + PRODUCT to MULTIPLICATOR times SMALL_MULTIPLICAND. + +Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP Library is free software; you can redistribute it and/or modify +it under the terms of the GNU Library General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at your +option) any later version. + +The GNU MP Library is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public +License for more details. + +You should have received a copy of the GNU Library General Public License +along with the GNU MP Library; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +MA 02111-1307, USA. */ + +#include "gmp.h" +#include "gmp-impl.h" + +void +#if __STDC__ +mpz_mul_ui (mpz_ptr prod, mpz_srcptr mult, unsigned long int small_mult) +#else +mpz_mul_ui (prod, mult, small_mult) + mpz_ptr prod; + mpz_srcptr mult; + unsigned long int small_mult; +#endif +{ + mp_size_t size = mult->_mp_size; + mp_size_t sign_product = size; + mp_limb_t cy; + mp_size_t prod_size; + mp_ptr prod_ptr; + + size = ABS (size); + + if (size == 0 || small_mult == 0) + { + prod->_mp_size = 0; + return; + } + + prod_size = size + 1; + if (prod->_mp_alloc < prod_size) + _mpz_realloc (prod, prod_size); + + prod_ptr = prod->_mp_d; + + cy = mpn_mul_1 (prod_ptr, mult->_mp_d, size, (mp_limb_t) small_mult); + if (cy != 0) + { + prod_ptr[size] = cy; + size++; + } + + prod->_mp_size = sign_product >= 0 ? size : -size; +} |