pqc/external/flint-2.4.3/fmpq/get_str.c
2014-05-24 23:16:06 +02:00

64 lines
1.8 KiB
C

/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FLINT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2011 Sebastian Pancratz
******************************************************************************/
#include "fmpq.h"
char * _fmpq_get_str(char * str, int b, const fmpz_t num, const fmpz_t den)
{
char *s;
if (str == NULL)
{
str = flint_malloc(fmpz_sizeinbase(num, b) + fmpz_sizeinbase(den, b) + 3);
if (str == NULL)
{
flint_printf("Exception (_fmpq_get_str). Not enough memory.\n");
abort();
}
}
fmpz_get_str(str, b, num);
if (!fmpz_is_one(den))
{
s = str;
while (*s != '\0')
s++;
*s = '/';
s++;
fmpz_get_str(s, b, den);
}
return str;
}
char * fmpq_get_str(char * str, int b, const fmpq_t f)
{
return _fmpq_get_str(str, b, fmpq_numref(f), fmpq_denref(f));
}