deps: Intl: Check in "small-icu" 57.1

* this commit has "small" ICU 57.1.
See other related commit for tools to generate this commit.

Fixes: https://github.com/nodejs/node/issues/3476
PR-URL: https://github.com/nodejs/node/pull/6088
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/deps/icu-small/source/io/unicode/ustream.h b/deps/icu-small/source/io/unicode/ustream.h
new file mode 100644
index 0000000000..41ccf5ae03
--- /dev/null
+++ b/deps/icu-small/source/io/unicode/ustream.h
@@ -0,0 +1,68 @@
+/*
+**********************************************************************
+*   Copyright (C) 2001-2014 International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*  FILE NAME : ustream.h
+*
+*   Modification History:
+*
+*   Date        Name        Description
+*   06/25/2001  grhoten     Move iostream from unistr.h
+******************************************************************************
+*/
+
+#ifndef USTREAM_H
+#define USTREAM_H
+
+#include "unicode/unistr.h"
+
+#if !UCONFIG_NO_CONVERSION  // not available without conversion
+
+/**
+ * \file
+ * \brief C++ API: Unicode iostream like API
+ *
+ * At this time, this API is very limited. It contains
+ * operator<< and operator>> for UnicodeString manipulation with the
+ * C++ I/O stream API.
+ */
+
+#if !defined(_MSC_VER)
+namespace std { class type_info; } // WORKAROUND: http://llvm.org/bugs/show_bug.cgi?id=13364
+#endif
+
+#if U_IOSTREAM_SOURCE >= 199711
+#if (__GNUC__ == 2)
+#include <iostream>
+#else
+#include <istream>
+#include <ostream>
+#endif
+
+U_NAMESPACE_BEGIN
+
+/**
+ * Write the contents of a UnicodeString to a C++ ostream. This functions writes
+ * the characters in a UnicodeString to an ostream. The UChars in the
+ * UnicodeString are converted to the char based ostream with the default
+ * converter.
+ * @stable 3.0
+ */
+U_IO_API std::ostream & U_EXPORT2 operator<<(std::ostream& stream, const UnicodeString& s);
+
+/**
+ * Write the contents from a C++ istream to a UnicodeString. The UChars in the
+ * UnicodeString are converted from the char based istream with the default
+ * converter.
+ * @stable 3.0
+ */
+U_IO_API std::istream & U_EXPORT2 operator>>(std::istream& stream, UnicodeString& s);
+U_NAMESPACE_END
+
+#endif
+
+/* No operator for UChar because it can conflict with wchar_t  */
+
+#endif
+#endif