gcc/libstdc++-v3/testsuite/21_strings/char_traits.cc

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// 1999-06-03 bkoz
// Copyright (C) 1999, 2000 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
// This 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 a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// 21.1 Characher traits
#include <string>
#ifdef DEBUG_ASSERT
#include <assert.h>
#endif
int test01(void)
{
bool test = true;
const std::string str_01("zuma beach");
const std::string str_02("montara and ocean beach");
// 21.1.1 character traits requirements
// Key for decoding what function signatures really mean:
// X == char_traits<_CharT>
// [c,d] == _CharT
// [p,q] == const _CharT*
// s == _CharT*
// [n,i,j] == size_t
// f == X::int_type
// pos == X::pos_type
// state == X::state_type
// void X::assign(char c, char d)
// assigns c = d;
char c1 = 'z';
char c2 = 'u';
test &= c1 != c2;
std::char_traits<char>::assign(c1,c2);
test &= c1 == 'u';
// char* X::move(char* s, const char* p, size_t n)
// for each i in [0,n) performs X::assign(s[i], p[i]). Copies
// correctly even where p is in [s, s + n), and yields s.
char array1[] = {'z', 'u', 'm', 'a', ' ', 'b', 'e', 'a', 'c', 'h', 0};
const char str_lit1[] = "montara and ocean beach";
int len = sizeof(str_lit1) + sizeof(array1) - 1; // two terminating chars
char array2[len];
test &= str_lit1[0] == 'm';
c1 = array2[0];
c2 = str_lit1[0];
char c3 = array2[1];
char c4 = str_lit1[1];
std::char_traits<char>::move(array2, str_lit1, 0);
test &= array2[0] == c1;
test &= str_lit1[0] == c2;
std::char_traits<char>::move(array2, str_lit1, 1);
test &= array2[0] == c2;
test &= str_lit1[0] == c2;
test &= array2[1] == c3;
test &= str_lit1[1] == c4;
std::char_traits<char>::move(array2, str_lit1, 2);
test &= array2[0] == c2;
test &= str_lit1[0] == c2;
test &= array2[1] == c4;
test &= str_lit1[1] == c4;
char* pc1 = array1 + 1;
c1 = pc1[0];
c2 = array1[0];
test &= c1 != c2;
char* pc2 = std::char_traits<char>::move(array1, pc1, 0);
c3 = pc1[0];
c4 = array1[0];
test &= c1 == c3;
test &= c2 == c4;
test &= pc2 == array1;
c1 = pc1[0];
c2 = array1[0];
char* pc3 = pc1;
pc2 = std::char_traits<char>::move(array1, pc1, 10);
c3 = pc1[0];
c4 = array1[0];
test &= c1 != c3; // underlying char array changed.
test &= c4 != c3;
test &= pc2 == array1;
test &= pc3 == pc1; // but pointers o-tay
c1 = *(str_01.data());
c2 = array1[0];
test &= c1 != c2;
#ifdef DEBUG_ASSERT
assert(test);
#endif
return test;
}
#if _GLIBCPP_USE_WCHAR_T
int test02(void)
{
bool test = true;
const std::wstring str_01(L"zuma beach");
const std::wstring str_02(L"montara and ocean beach");
// 21.1.1 character traits requirements
// Key for decoding what function signatures really mean:
// X == char_traits<_CharT>
// [c,d] == _CharT
// [p,q] == const _CharT*
// s == _CharT*
// [n,i,j] == size_t
// f == X::int_type
// pos == X::pos_type
// state == X::state_type
// void X::assign(wchar_t c, wchar_t d)
// assigns c = d;
wchar_t c1 = L'z';
wchar_t c2 = L'u';
test &= c1 != c2;
std::char_traits<wchar_t>::assign(c1,c2);
test &= c1 == L'u';
// char* X::move(char* s, const char* p, size_t n)
// for each i in [0,n) performs X::assign(s[i], p[i]). Copies
// correctly even where p is in [s, s + n), and yields s.
wchar_t array1[] = {L'z', L'u', L'm', L'a', L' ', L'b', L'e', L'a', L'c', L'h', 0};
const wchar_t str_lit1[] = L"montara and ocean beach";
int len = sizeof(str_lit1) + sizeof(array1) - 1; // two terminating chars
wchar_t array2[len];
test &= str_lit1[0] == 'm';
c1 = array2[0];
c2 = str_lit1[0];
wchar_t c3 = array2[1];
wchar_t c4 = str_lit1[1];
std::char_traits<wchar_t>::move(array2, str_lit1, 0);
test &= array2[0] == c1;
test &= str_lit1[0] == c2;
std::char_traits<wchar_t>::move(array2, str_lit1, 1);
test &= array2[0] == c2;
test &= str_lit1[0] == c2;
test &= array2[1] == c3;
test &= str_lit1[1] == c4;
std::char_traits<wchar_t>::move(array2, str_lit1, 2);
test &= array2[0] == c2;
test &= str_lit1[0] == c2;
test &= array2[1] == c4;
test &= str_lit1[1] == c4;
wchar_t* pc1 = array1 + 1;
c1 = pc1[0];
c2 = array1[0];
test &= c1 != c2;
wchar_t* pc2 = std::char_traits<wchar_t>::move(array1, pc1, 0);
c3 = pc1[0];
c4 = array1[0];
test &= c1 == c3;
test &= c2 == c4;
test &= pc2 == array1;
c1 = pc1[0];
c2 = array1[0];
wchar_t* pc3 = pc1;
pc2 = std::char_traits<wchar_t>::move(array1, pc1, 10);
c3 = pc1[0];
c4 = array1[0];
test &= c1 != c3; // underlying wchar_t array changed.
test &= c4 != c3;
test &= pc2 == array1;
test &= pc3 == pc1; // but pointers o-tay
c1 = *(str_01.data());
c2 = array1[0];
test &= c1 != c2;
#ifdef DEBUG_ASSERT
assert(test);
#endif
return test;
}
#endif //_GLIBCPP_USE_WCHAR_T
int main()
{
test01();
#if _GLIBCPP_USE_WCHAR_T
test02();
#endif
}