diff options
author | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:36:36 +0200 |
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committer | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:42:26 +0200 |
commit | a89a14ef5da44684a16b204e7a70460cc8c4922a (patch) | |
tree | b23b4c6b155977909ef508fdae2f48d33d802813 /vendor/gmp-6.3.0/cxx/ismpznw.cc | |
parent | 1db63fcedab0b288820d66e100b1877b1a5a8851 (diff) |
Basic constant folding implementation
Diffstat (limited to 'vendor/gmp-6.3.0/cxx/ismpznw.cc')
-rw-r--r-- | vendor/gmp-6.3.0/cxx/ismpznw.cc | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/vendor/gmp-6.3.0/cxx/ismpznw.cc b/vendor/gmp-6.3.0/cxx/ismpznw.cc new file mode 100644 index 0000000..84f2806 --- /dev/null +++ b/vendor/gmp-6.3.0/cxx/ismpznw.cc @@ -0,0 +1,72 @@ +/* __gmpz_operator_in_nowhite -- C++-style input of mpz_t, no whitespace skip. + +Copyright 2001, 2003 Free Software Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP Library is free software; you can redistribute it and/or modify +it under the terms of either: + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your + option) any later version. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +The GNU MP Library is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include <cctype> +#include <iostream> +#include <string> +#include "gmp-impl.h" + +using namespace std; + + +// For g++ libstdc++ parsing see num_get<chartype,initer>::_M_extract_int in +// include/bits/locale_facets.tcc. + +istream & +__gmpz_operator_in_nowhite (istream &i, mpz_ptr z, char c) +{ + int base; + string s; + bool ok = false, zero, showbase; + + if (c == '-' || c == '+') // sign + { + if (c == '-') // mpz_set_str doesn't accept '+' + s = "-"; + i.get(c); + } + + base = __gmp_istream_set_base(i, c, zero, showbase); // select the base + __gmp_istream_set_digits(s, i, c, ok, base); // read the number + + if (i.good()) // last character read was non-numeric + i.putback(c); + else if (i.eof() && (ok || zero)) // stopped just before eof + i.clear(ios::eofbit); + + if (ok) + ASSERT_NOCARRY (mpz_set_str (z, s.c_str(), base)); // extract the number + else if (zero) + mpz_set_ui(z, 0); + else + i.setstate(ios::failbit); // read failed + + return i; +} |