1/* operator<< -- mpf formatted output to an ostream. 2 3Copyright 2001, 2002 Free Software Foundation, Inc. 4 5This file is part of the GNU MP Library. 6 7The GNU MP Library is free software; you can redistribute it and/or modify 8it under the terms of the GNU Lesser General Public License as published by 9the Free Software Foundation; either version 3 of the License, or (at your 10option) any later version. 11 12The GNU MP Library is distributed in the hope that it will be useful, but 13WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15License for more details. 16 17You should have received a copy of the GNU Lesser General Public License 18along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 19 20#include <clocale> 21#include <iostream> 22#include <stdarg.h> /* for va_list and hence doprnt_funs_t */ 23#include <string.h> 24 25#include "gmp.h" 26#include "gmp-impl.h" 27 28using namespace std; 29 30 31/* The gmp_asprintf support routines never give an error, so 32 __gmp_doprnt_mpf shouldn't fail and it's return can just be checked with 33 an ASSERT. */ 34 35ostream& 36operator<< (ostream &o, mpf_srcptr f) 37{ 38 struct doprnt_params_t param; 39 struct gmp_asprintf_t d; 40 char *result; 41 int ret; 42 43 __gmp_doprnt_params_from_ios (¶m, o); 44 45#if HAVE_STD__LOCALE 46 char point[2]; 47 point[0] = use_facet< numpunct<char> >(o.getloc()).decimal_point(); 48 point[1] = '\0'; 49#else 50 const char *point = localeconv()->decimal_point; 51#endif 52 53 GMP_ASPRINTF_T_INIT (d, &result); 54 ret = __gmp_doprnt_mpf (&__gmp_asprintf_funs_noformat, &d, ¶m, point, f); 55 ASSERT (ret != -1); 56 __gmp_asprintf_final (&d); 57 58 gmp_allocated_string t (result); 59 return o.write (t.str, t.len); 60} 61