1 /* operator>> -- C++-style input of mpz_t.
2
3 Copyright 2001, 2003 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 either:
9
10 * the GNU Lesser General Public License as published by the Free
11 Software Foundation; either version 3 of the License, or (at your
12 option) any later version.
13
14 or
15
16 * the GNU General Public License as published by the Free Software
17 Foundation; either version 2 of the License, or (at your option) any
18 later version.
19
20 or both in parallel, as here.
21
22 The GNU MP Library is distributed in the hope that it will be useful, but
23 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
24 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
25 for more details.
26
27 You should have received copies of the GNU General Public License and the
28 GNU Lesser General Public License along with the GNU MP Library. If not,
29 see https://www.gnu.org/licenses/. */
30
31 #include <cctype>
32 #include <iostream>
33 #include <string>
34 #include "gmp-impl.h"
35
36 using namespace std;
37
38
39 // For g++ libstdc++ parsing see num_get<chartype,initer>::_M_extract_int in
40 // include/bits/locale_facets.tcc.
41
42 istream &
operator >>(istream & i,mpz_ptr z)43 operator>> (istream &i, mpz_ptr z)
44 {
45 char c = 0;
46 i.get(c); // start reading
47
48 if (i.flags() & ios::skipws) // skip initial whitespace
49 {
50 #if HAVE_STD__LOCALE
51 const ctype<char>& ct = use_facet< ctype<char> >(i.getloc());
52 #define cxx_isspace(c) (ct.is(ctype_base::space,(c)))
53 #else
54 #define cxx_isspace(c) isspace(c)
55 #endif
56
57 while (cxx_isspace(c) && i.get(c))
58 ;
59 }
60
61 return __gmpz_operator_in_nowhite (i, z, c);
62 }
63