96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2011 Andy Novocin
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******************************************************************************/
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#include "fmpz_mat.h"
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int
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fmpz_mat_fread(FILE* file, fmpz_mat_t mat)
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{
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slong r, c, i, j;
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int byte_count;
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mpz_t t;
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/* first number in file should be row dimension */
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mpz_init(t);
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byte_count = mpz_inp_str(t, file, 10);
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if (byte_count == 0)
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{
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mpz_clear(t);
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return 0;
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}
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if (!mpz_fits_slong_p(t))
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{
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flint_printf("Exception (fmpz_mat_fread). "
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"Number of rows does not fit into a slong.\n");
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abort();
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}
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r = flint_mpz_get_si(t);
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/* second number in file should be column dimension */
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byte_count = mpz_inp_str(t, file, 10);
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if (byte_count == 0)
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{
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mpz_clear(t);
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return 0;
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}
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if (!mpz_fits_slong_p(t))
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{
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flint_printf("Exception (fmpz_mat_fread). "
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"Number of columns does not fit into a slong.\n");
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abort();
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}
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c = flint_mpz_get_si(t);
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mpz_clear(t);
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/* if the input is 0 by 0 then set the dimensions to r and c */
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if (mat->r == 0 && mat->c == 0)
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{
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fmpz_mat_clear(mat);
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fmpz_mat_init(mat,r,c);
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}
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else if (mat->r == 0 && mat->c == 0)
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{
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flint_printf("Exception (fmpz_mat_fread). \n"
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"Dimensions are non-zero and do not match input dimensions.\n");
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abort();
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}
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for (i = 0; i < r; i++)
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{
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for (j = 0; j < c; j++)
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{
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if (!fmpz_fread(file, fmpz_mat_entry(mat, i, j)))
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return 0;
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}
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}
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/* a return value of 0 means a problem with
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the file stream a value of 1 means success*/
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return 1;
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}
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