get_pointer_size_chart.pass.cpp revision b64f8b07c104c6cc986570ac8ee0ed16a9f23976 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <istream>
11
12// basic_istream<charT,traits>& get(char_type* s, streamsize n, char_type delim);
13
14#include <istream>
15#include <cassert>
16
17template <class CharT>
18struct testbuf
19    : public std::basic_streambuf<CharT>
20{
21    typedef std::basic_string<CharT> string_type;
22    typedef std::basic_streambuf<CharT> base;
23private:
24    string_type str_;
25public:
26
27    testbuf() {}
28    testbuf(const string_type& str)
29        : str_(str)
30    {
31        base::setg(const_cast<CharT*>(str_.data()),
32                   const_cast<CharT*>(str_.data()),
33                   const_cast<CharT*>(str_.data()) + str_.size());
34    }
35
36    CharT* eback() const {return base::eback();}
37    CharT* gptr() const {return base::gptr();}
38    CharT* egptr() const {return base::egptr();}
39};
40
41int main()
42{
43    {
44        testbuf<char> sb("  *    * ");
45        std::istream is(&sb);
46        char s[5];
47        is.get(s, 5, '*');
48        assert(!is.eof());
49        assert(!is.fail());
50        assert(std::string(s) == "  ");
51        assert(is.gcount() == 2);
52        is.get(s, 5, '*');
53        assert(!is.eof());
54        assert( is.fail());
55        assert(std::string(s) == "");
56        assert(is.gcount() == 0);
57        is.clear();
58        assert(is.get() == '*');
59        is.get(s, 5, '*');
60        assert(!is.eof());
61        assert(!is.fail());
62        assert(std::string(s) == "    ");
63        assert(is.gcount() == 4);
64        assert(is.get() == '*');
65        is.get(s, 5, '*');
66        assert( is.eof());
67        assert(!is.fail());
68        assert(std::string(s) == " ");
69        assert(is.gcount() == 1);
70    }
71    {
72        testbuf<wchar_t> sb(L"  *    * ");
73        std::wistream is(&sb);
74        wchar_t s[5];
75        is.get(s, 5, L'*');
76        assert(!is.eof());
77        assert(!is.fail());
78        assert(std::wstring(s) == L"  ");
79        assert(is.gcount() == 2);
80        is.get(s, 5, L'*');
81        assert(!is.eof());
82        assert( is.fail());
83        assert(std::wstring(s) == L"");
84        assert(is.gcount() == 0);
85        is.clear();
86        assert(is.get() == L'*');
87        is.get(s, 5, L'*');
88        assert(!is.eof());
89        assert(!is.fail());
90        assert(std::wstring(s) == L"    ");
91        assert(is.gcount() == 4);
92        assert(is.get() == L'*');
93        is.get(s, 5, L'*');
94        assert( is.eof());
95        assert(!is.fail());
96        assert(std::wstring(s) == L" ");
97        assert(is.gcount() == 1);
98    }
99}
100