t-locale.cc
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上传日期:2022-08-06
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- /* Test locale support in C++ functions.
- Copyright 2001, 2002, 2003, 2007 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 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.
- 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 Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #include <clocale>
- #include <iostream>
- #include <cstdlib>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "tests.h"
- using namespace std;
- extern "C" {
- char point_string[2];
- }
- #if HAVE_STD__LOCALE
- // Like std::numpunct, but with decimal_point coming from point_string[].
- class my_numpunct : public numpunct<char> {
- public:
- explicit my_numpunct (size_t r = 0) : numpunct<char>(r) { }
- protected:
- char do_decimal_point() const { return point_string[0]; }
- };
- #endif
- void
- set_point (char c)
- {
- point_string[0] = c;
- #if HAVE_STD__LOCALE
- locale loc (locale::classic(), new my_numpunct ());
- locale::global (loc);
- #endif
- }
- void
- check_input (void)
- {
- static const struct {
- const char *str1;
- const char *str2;
- double want;
- } data[] = {
- { "1","", 1.0 },
- { "1","0", 1.0 },
- { "1","00", 1.0 },
- { "","5", 0.5 },
- { "0","5", 0.5 },
- { "00","5", 0.5 },
- { "00","50", 0.5 },
- { "1","5", 1.5 },
- { "1","5e1", 15.0 },
- };
- static char point[] = {
- '.', ',', 'x', 'xFF'
- };
- mpf_t got;
- mpf_init (got);
- for (size_t i = 0; i < numberof (point); i++)
- {
- set_point (point[i]);
- for (int neg = 0; neg <= 1; neg++)
- {
- for (size_t j = 0; j < numberof (data); j++)
- {
- string str = string(data[j].str1)+point[i]+string(data[j].str2);
- if (neg)
- str = "-" + str;
- istringstream is (str.c_str());
- mpf_set_ui (got, 123); // dummy initial value
- if (! (is >> got))
- {
- cout << "istream mpf_t operator>> errorn";
- cout << " point " << point[i] << "n";
- cout << " str "" << str << ""n";
- cout << " localeconv point ""
- << localeconv()->decimal_point << ""n";
- abort ();
- }
- double want = data[j].want;
- if (neg)
- want = -want;
- if (mpf_cmp_d (got, want) != 0)
- {
- cout << "istream mpf_t operator>> wrongn";
- cout << " point " << point[i] << "n";
- cout << " str "" << str << ""n";
- cout << " got " << got << "n";
- cout << " want " << want << "n";
- cout << " localeconv point ""
- << localeconv()->decimal_point << ""n";
- abort ();
- }
- }
- }
- }
- mpf_clear (got);
- }
- void
- check_output (void)
- {
- static char point[] = {
- '.', ',', 'x', 'xFF'
- };
- for (size_t i = 0; i < numberof (point); i++)
- {
- set_point (point[i]);
- ostringstream got;
- mpf_t f;
- mpf_init (f);
- mpf_set_d (f, 1.5);
- got << f;
- mpf_clear (f);
- string want = string("1") + point[i] + string("5");
- if (want.compare (got.str()) != 0)
- {
- cout << "ostream mpf_t operator<< doesn't respect localen";
- cout << " point " << point[i] << "n";
- cout << " got "" << got.str() << ""n";
- cout << " want "" << want << ""n";
- abort ();
- }
- }
- }
- int
- replacement_works (void)
- {
- set_point ('x');
- mpf_t f;
- mpf_init (f);
- mpf_set_d (f, 1.5);
- ostringstream s;
- s << f;
- mpf_clear (f);
- return (s.str().compare("1x5") == 0);
- }
- int
- main (void)
- {
- tests_start ();
- if (replacement_works())
- {
- check_input ();
- check_output ();
- }
- else
- {
- cout << "Replacing decimal point didn't work, tests skippedn";
- }
- tests_end ();
- return 0;
- }