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b58ddff026
* merged mpfr 3.0.0 and gmp 5.0.1 in buildtools trunk git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@37378 a95241bf-73f2-0310-859d-f6bbb57e9c96
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/* mpq_get_str -- mpq to string conversion.
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Copyright 2001, 2002, 2006 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
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#include <stdio.h>
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#include <string.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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char *
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mpq_get_str (char *str, int base, mpq_srcptr q)
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{
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size_t str_alloc, len;
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ASSERT (ABS(base) >= 2);
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ASSERT (ABS(base) <= 62);
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str_alloc = 0;
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if (str == NULL)
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{
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/* This is an overestimate since we don't bother checking how much of
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the high limbs of num and den are used. +2 for rounding up the
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chars per bit of num and den. +3 for sign, slash and '\0'. */
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str_alloc = ((size_t) ((ABS (q->_mp_num._mp_size) + q->_mp_den._mp_size)
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* GMP_LIMB_BITS
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* mp_bases[ABS(base)].chars_per_bit_exactly))
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+ 5;
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str = (char *) (*__gmp_allocate_func) (str_alloc);
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}
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mpz_get_str (str, base, mpq_numref(q));
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len = strlen (str);
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if (! MPZ_EQUAL_1_P (mpq_denref (q)))
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{
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str[len++] = '/';
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mpz_get_str (str+len, base, mpq_denref(q));
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len += strlen (str+len);
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}
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ASSERT (len == strlen(str));
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ASSERT (str_alloc == 0 || len+1 <= str_alloc);
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ASSERT (len+1 <= /* size recommended to applications */
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mpz_sizeinbase (mpq_numref(q), ABS(base)) +
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mpz_sizeinbase (mpq_denref(q), ABS(base)) + 3);
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if (str_alloc != 0)
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__GMP_REALLOCATE_FUNC_MAYBE_TYPE (str, str_alloc, len+1, char);
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return str;
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}
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