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79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
/*++
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Copyright (c) 2011 Microsoft Corporation
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Module Name:
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mpn.h
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Abstract:
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Multi Precision Natural Numbers
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Author:
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Christoph Wintersteiger (cwinter) 2011-11-16.
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Revision History:
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--*/
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#pragma once
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#include<ostream>
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#include "util/util.h"
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#include "util/buffer.h"
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typedef unsigned int mpn_digit;
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class mpn_manager {
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public:
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int compare(mpn_digit const * a, unsigned lnga,
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mpn_digit const * b, unsigned lngb) const;
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bool add(mpn_digit const * a, unsigned lnga,
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mpn_digit const * b, unsigned lngb,
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mpn_digit *c, unsigned lngc_alloc,
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unsigned * plngc) const;
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bool sub(mpn_digit const * a, unsigned lnga,
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mpn_digit const * b, unsigned lngb,
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mpn_digit * c, mpn_digit * pborrow) const;
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bool mul(mpn_digit const * a, unsigned lnga,
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mpn_digit const * b, unsigned lngb,
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mpn_digit * c) const;
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bool div(mpn_digit const * numer, unsigned lnum,
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mpn_digit const * denom, unsigned lden,
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mpn_digit * quot,
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mpn_digit * rem);
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char * to_string(mpn_digit const * a, unsigned lng,
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char * buf, unsigned lbuf) const;
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private:
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using mpn_sbuffer = sbuffer<mpn_digit>;
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void display_raw(std::ostream & out, mpn_digit const * a, unsigned lng) const;
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unsigned div_normalize(mpn_digit const * numer, unsigned lnum,
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mpn_digit const * denom, unsigned lden,
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mpn_sbuffer & n_numer,
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mpn_sbuffer & n_denom) const;
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void div_unnormalize(mpn_sbuffer & numer, mpn_sbuffer & denom,
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unsigned d, mpn_digit * rem) const;
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bool div_1(mpn_sbuffer & numer, mpn_digit denom,
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mpn_digit * quot) const;
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bool div_n(mpn_sbuffer & numer, mpn_sbuffer const & denom,
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mpn_digit * quot, mpn_digit * rem,
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mpn_sbuffer & ms, mpn_sbuffer & ab) const;
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void trace(mpn_digit const * a, unsigned lnga,
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mpn_digit const * b, unsigned lngb,
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const char * op) const;
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void trace(mpn_digit const * a, unsigned lnga) const;
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void trace_nl(mpn_digit const * a, unsigned lnga) const;
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};
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