libcxx initial import
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/input.output/iostream.format/input.streams/istream.unformatted/seekg_off.pass.cpp b/test/input.output/iostream.format/input.streams/istream.unformatted/seekg_off.pass.cpp
new file mode 100644
index 0000000..b185d5a
--- /dev/null
+++ b/test/input.output/iostream.format/input.streams/istream.unformatted/seekg_off.pass.cpp
@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <istream>
+
+// basic_istream<charT,traits>& seekg(off_type off, ios_base::seekdir dir);
+
+#include <istream>
+#include <cassert>
+
+int seekoff_called = 0;
+
+template <class CharT>
+struct testbuf
+ : public std::basic_streambuf<CharT>
+{
+ typedef std::basic_string<CharT> string_type;
+ typedef std::basic_streambuf<CharT> base;
+private:
+ string_type str_;
+public:
+
+ testbuf() {}
+ testbuf(const string_type& str)
+ : str_(str)
+ {
+ base::setg(const_cast<CharT*>(str_.data()),
+ const_cast<CharT*>(str_.data()),
+ const_cast<CharT*>(str_.data()) + str_.size());
+ }
+
+ CharT* eback() const {return base::eback();}
+ CharT* gptr() const {return base::gptr();}
+ CharT* egptr() const {return base::egptr();}
+protected:
+ typename base::pos_type seekoff(typename base::off_type off,
+ std::ios_base::seekdir way,
+ std::ios_base::openmode which)
+ {
+ assert(which == std::ios_base::in);
+ ++seekoff_called;
+ return off;
+ }
+};
+
+int main()
+{
+ {
+ testbuf<char> sb(" 123456789");
+ std::istream is(&sb);
+ is.seekg(5, std::ios_base::cur);
+ assert(is.good());
+ assert(seekoff_called == 1);
+ }
+ {
+ testbuf<wchar_t> sb(L" 123456789");
+ std::wistream is(&sb);
+ is.seekg(5, std::ios_base::cur);
+ assert(is.good());
+ assert(seekoff_called == 2);
+ }
+}