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
17 template <class CharT>
18 struct testbuf
19 : public std::basic_streambuf<CharT>
20 {
21 typedef std::basic_string<CharT> string_type;
22 typedef std::basic_streambuf<CharT> base;
23 private:
24 string_type str_;
25 public:
26
testbuftestbuf27 testbuf() {}
testbuftestbuf28 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
ebacktestbuf36 CharT* eback() const {return base::eback();}
gptrtestbuf37 CharT* gptr() const {return base::gptr();}
egptrtestbuf38 CharT* egptr() const {return base::egptr();}
39 };
40
main()41 int 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