1 /* operator<< -- mpf formatted output to an ostream. 2 3 Copyright 2001, 2002 Free Software Foundation, Inc. 4 5 This file is part of the GNU MP Library. 6 7 The GNU MP Library is free software; you can redistribute it and/or modify 8 it under the terms of the GNU Lesser General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or (at your 10 option) any later version. 11 12 The GNU MP Library is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15 License for more details. 16 17 You should have received a copy of the GNU Lesser General Public License 18 along 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 28 using 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 35 ostream& 36 operator<< (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