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>& getline(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.getline(s, 5, '*');
48        assert(!is.eof());
49        assert(!is.fail());
50        assert(std::string(s) == "  ");
51        assert(is.gcount() == 3);
52        is.getline(s, 5, '*');
53        assert(!is.eof());
54        assert(!is.fail());
55        assert(std::string(s) == "    ");
56        assert(is.gcount() == 5);
57        is.getline(s, 5, '*');
58        assert( is.eof());
59        assert(!is.fail());
60        assert(std::string(s) == " ");
61        assert(is.gcount() == 1);
62    }
63    {
64        testbuf<wchar_t> sb(L"  *    * ");
65        std::wistream is(&sb);
66        wchar_t s[5];
67        is.getline(s, 5, L'*');
68        assert(!is.eof());
69        assert(!is.fail());
70        assert(std::wstring(s) == L"  ");
71        assert(is.gcount() == 3);
72        is.getline(s, 5, L'*');
73        assert(!is.eof());
74        assert(!is.fail());
75        assert(std::wstring(s) == L"    ");
76        assert(is.gcount() == 5);
77        is.getline(s, 5, L'*');
78        assert( is.eof());
79        assert(!is.fail());
80        assert(std::wstring(s) == L" ");
81        assert(is.gcount() == 1);
82    }
83}
84