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 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 <cctype> 21 #include <iostream> 22 #include <string> 23 #include "gmp.h" 24 #include "gmp-impl.h" 25 26 using namespace std; 27 28 29 // For g++ libstdc++ parsing see num_get<chartype,initer>::_M_extract_int in 30 // include/bits/locale_facets.tcc. 31 32 istream & 33 __gmpz_operator_in_nowhite (istream &i, mpz_ptr z, char c) 34 { 35 int base; 36 string s; 37 bool ok = false, zero, showbase; 38 39 if (c == '-' || c == '+') // sign 40 { 41 if (c == '-') // mpz_set_str doesn't accept '+' 42 s = "-"; 43 i.get(c); 44 } 45 46 base = __gmp_istream_set_base(i, c, zero, showbase); // select the base 47 __gmp_istream_set_digits(s, i, c, ok, base); // read the number 48 49 if (i.good()) // last character read was non-numeric 50 i.putback(c); 51 else if (i.eof() && (ok || zero)) // stopped just before eof 52 i.clear(ios::eofbit); 53 54 if (ok) 55 ASSERT_NOCARRY (mpz_set_str (z, s.c_str(), base)); // extract the number 56 else if (zero) 57 mpz_set_ui(z, 0); 58 else 59 i.setstate(ios::failbit); // read failed 60 61 return i; 62 } 63