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62 lines
2.5 KiB
C
62 lines
2.5 KiB
C
/*
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* Copyright (c) 2014 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef CRYB_MPI_H_INCLUDED
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#define CRYB_MPI_H_INCLUDED
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#define CRYB_MPI_SWORDS 16
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typedef struct cryb_mpi {
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uint32_t *words; /* pointer to words */
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size_t size; /* number of words */
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unsigned int msb; /* most significant bit */
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unsigned int neg:1; /* negative */
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uint32_t swords[CRYB_MPI_SWORDS];
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} cryb_mpi;
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/* all-zeroes MPI - not the same as a zero-value MPI! */
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#define CRYB_MPI_ZERO { 0, 0, 0, 0, { 0 } }
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void mpi_init(cryb_mpi *);
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void mpi_destroy(cryb_mpi *);
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int mpi_grow(cryb_mpi *, unsigned int);
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void mpi_zero(cryb_mpi *);
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void mpi_negate(cryb_mpi *);
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int mpi_copy(cryb_mpi *, const cryb_mpi *);
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void mpi_swap(cryb_mpi *, cryb_mpi *);
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int mpi_load(cryb_mpi *, const uint8_t *, size_t);
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int mpi_set(cryb_mpi *, int32_t);
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int mpi_lshift(cryb_mpi *, unsigned int);
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int mpi_rshift(cryb_mpi *, unsigned int);
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int mpi_add_abs(cryb_mpi *, cryb_mpi *, cryb_mpi *);
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int mpi_sub_abs(cryb_mpi *, cryb_mpi *, cryb_mpi *);
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int mpi_cmp_abs(cryb_mpi *, cryb_mpi *);
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int mpi_cmp(cryb_mpi *, cryb_mpi *);
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#endif
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