osmpf.cc
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上传日期:2022-08-06
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- /* operator<< -- mpf formatted output to an ostream.
- Copyright 2001, 2002 Free Software Foundation, Inc.
- This file is part of the GNU MP Library.
- The GNU MP Library is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 3 of the License, or (at your
- option) any later version.
- The GNU MP Library 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 Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #include <clocale>
- #include <iostream>
- #include <stdarg.h> /* for va_list and hence doprnt_funs_t */
- #include <string.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- using namespace std;
- /* The gmp_asprintf support routines never give an error, so
- __gmp_doprnt_mpf shouldn't fail and it's return can just be checked with
- an ASSERT. */
- ostream&
- operator<< (ostream &o, mpf_srcptr f)
- {
- struct doprnt_params_t param;
- struct gmp_asprintf_t d;
- char *result;
- int ret;
- __gmp_doprnt_params_from_ios (¶m, o);
- #if HAVE_STD__LOCALE
- char point[2];
- point[0] = use_facet< numpunct<char> >(o.getloc()).decimal_point();
- point[1] = ' ';
- #else
- const char *point = localeconv()->decimal_point;
- #endif
- GMP_ASPRINTF_T_INIT (d, &result);
- ret = __gmp_doprnt_mpf (&__gmp_asprintf_funs_noformat, &d, ¶m, point, f);
- ASSERT (ret != -1);
- __gmp_asprintf_final (&d);
- gmp_allocated_string t (result);
- return o.write (t.str, t.len);
- }