version 1.1.1.2, 2000/09/09 14:12:50 |
version 1.1.1.3, 2003/08/25 16:06:33 |
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/* mpz_cmp_ui.c -- Compare a mpz_t a with an mp_limb_t b. Return positive, |
/* mpz_cmp_ui.c -- Compare a mpz_t a with an mp_limb_t b. Return positive, |
zero, or negative based on if a > b, a == b, or a < b. |
zero, or negative based on if a > b, a == b, or a < b. |
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Copyright (C) 1991, 1993, 1994, 1995, 1996 Free Software Foundation, Inc. |
Copyright 1991, 1993, 1994, 1995, 1996, 2001, 2002 Free Software Foundation, |
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Inc. |
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This file is part of the GNU MP Library. |
This file is part of the GNU MP Library. |
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Line 24 MA 02111-1307, USA. */ |
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Line 25 MA 02111-1307, USA. */ |
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#include "gmp-impl.h" |
#include "gmp-impl.h" |
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int |
int |
#if __STDC__ |
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_mpz_cmp_ui (mpz_srcptr u, unsigned long int v_digit) |
_mpz_cmp_ui (mpz_srcptr u, unsigned long int v_digit) |
#else |
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_mpz_cmp_ui (u, v_digit) |
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mpz_srcptr u; |
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unsigned long int v_digit; |
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#endif |
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{ |
{ |
mp_size_t usize = u->_mp_size; |
mp_ptr up; |
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mp_size_t un; |
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mp_limb_t ul; |
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if (usize == 0) |
up = PTR(u); |
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un = SIZ(u); |
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if (un == 0) |
return -(v_digit != 0); |
return -(v_digit != 0); |
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if (usize == 1) |
if (un == 1) |
{ |
{ |
mp_limb_t u_digit; |
ul = up[0]; |
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if (ul > v_digit) |
u_digit = u->_mp_d[0]; |
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if (u_digit > v_digit) |
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return 1; |
return 1; |
if (u_digit < v_digit) |
if (ul < v_digit) |
return -1; |
return -1; |
return 0; |
return 0; |
} |
} |
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return (usize > 0) ? 1 : -1; |
#if GMP_NAIL_BITS != 0 |
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if (v_digit > GMP_NUMB_MAX) |
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{ |
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if (un == 2) |
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{ |
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ul = up[0] + (up[1] << GMP_NUMB_BITS); |
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if ((up[1] >> GMP_NAIL_BITS) != 0) |
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return 1; |
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if (ul > v_digit) |
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return 1; |
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if (ul < v_digit) |
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return -1; |
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return 0; |
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} |
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} |
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#endif |
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return un > 0 ? 1 : -1; |
} |
} |