e554550755
for file in $(find -name \*.h ) ; do sed -e "s/#include \"gmp\.h\"/#include \"mpir.h\"/g" $file > temp ; mv temp $file ; done for file in $(find -name \*.cc) ; do sed -e "s/#include \"gmp\.h\"/#include \"mpir.h\"/g" $file > temp ; mv temp $file ; done
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/* mpq_cmp_ui(u,vn,vd) -- Compare U with Vn/Vd. Return positive, zero, or
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negative based on if U > V, U == V, or U < V. Vn and Vd may have
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common factors.
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Copyright 1993, 1994, 1996, 2000, 2001, 2002, 2003, 2005 Free Software
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Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "mpir.h"
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#include "gmp-impl.h"
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int
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_mpq_cmp_ui (const MP_RAT *op1, unsigned long int num2, unsigned long int den2)
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{
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mp_size_t num1_size = op1->_mp_num._mp_size;
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mp_size_t den1_size = op1->_mp_den._mp_size;
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mp_size_t tmp1_size, tmp2_size;
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mp_ptr tmp1_ptr, tmp2_ptr;
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mp_limb_t cy_limb;
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int cc;
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TMP_DECL;
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#if GMP_NAIL_BITS != 0
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if ((num2 | den2) > GMP_NUMB_MAX)
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{
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mpq_t op2;
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mpq_init (op2);
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mpz_set_ui (mpq_numref (op2), num2);
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mpz_set_ui (mpq_denref (op2), den2);
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cc = mpq_cmp (op1, op2);
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mpq_clear (op2);
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return cc;
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}
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#endif
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/* need canonical sign to get right result */
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ASSERT (den1_size > 0);
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if (den2 == 0)
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DIVIDE_BY_ZERO;
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if (num1_size == 0)
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return -(num2 != 0);
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if (num1_size < 0)
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return num1_size;
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if (num2 == 0)
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return num1_size;
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/* NUM1 x DEN2 is either TMP1_SIZE limbs or TMP1_SIZE-1 limbs.
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Same for NUM1 x DEN1 with respect to TMP2_SIZE. */
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if (num1_size > den1_size + 1)
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/* NUM1 x DEN2 is surely larger in magnitude than NUM2 x DEN1. */
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return num1_size;
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if (den1_size > num1_size + 1)
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/* NUM1 x DEN2 is surely smaller in magnitude than NUM2 x DEN1. */
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return -num1_size;
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TMP_MARK;
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tmp1_ptr = (mp_ptr) TMP_ALLOC ((num1_size + 1) * BYTES_PER_MP_LIMB);
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tmp2_ptr = (mp_ptr) TMP_ALLOC ((den1_size + 1) * BYTES_PER_MP_LIMB);
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cy_limb = mpn_mul_1 (tmp1_ptr, op1->_mp_num._mp_d, num1_size,
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(mp_limb_t) den2);
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tmp1_ptr[num1_size] = cy_limb;
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tmp1_size = num1_size + (cy_limb != 0);
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cy_limb = mpn_mul_1 (tmp2_ptr, op1->_mp_den._mp_d, den1_size,
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(mp_limb_t) num2);
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tmp2_ptr[den1_size] = cy_limb;
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tmp2_size = den1_size + (cy_limb != 0);
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cc = tmp1_size - tmp2_size != 0
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? tmp1_size - tmp2_size : mpn_cmp (tmp1_ptr, tmp2_ptr, tmp1_size);
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TMP_FREE;
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return cc;
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}
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