| Austin Schuh | dace2a6 | 2020-08-18 10:56:48 -0700 | [diff] [blame] | 1 | /* __gmpz_operator_in_nowhite -- C++-style input of mpz_t, no whitespace skip. |
| 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 & |
| 43 | __gmpz_operator_in_nowhite (istream &i, mpz_ptr z, char c) |
| 44 | { |
| 45 | int base; |
| 46 | string s; |
| 47 | bool ok = false, zero, showbase; |
| 48 | |
| 49 | if (c == '-' || c == '+') // sign |
| 50 | { |
| 51 | if (c == '-') // mpz_set_str doesn't accept '+' |
| 52 | s = "-"; |
| 53 | i.get(c); |
| 54 | } |
| 55 | |
| 56 | base = __gmp_istream_set_base(i, c, zero, showbase); // select the base |
| 57 | __gmp_istream_set_digits(s, i, c, ok, base); // read the number |
| 58 | |
| 59 | if (i.good()) // last character read was non-numeric |
| 60 | i.putback(c); |
| 61 | else if (i.eof() && (ok || zero)) // stopped just before eof |
| 62 | i.clear(ios::eofbit); |
| 63 | |
| 64 | if (ok) |
| 65 | ASSERT_NOCARRY (mpz_set_str (z, s.c_str(), base)); // extract the number |
| 66 | else if (zero) |
| 67 | mpz_set_ui(z, 0); |
| 68 | else |
| 69 | i.setstate(ios::failbit); // read failed |
| 70 | |
| 71 | return i; |
| 72 | } |