ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/regex/v4/primary_transform.hpp b/include/ndnboost/regex/v4/primary_transform.hpp
new file mode 100644
index 0000000..0c9bc68
--- /dev/null
+++ b/include/ndnboost/regex/v4/primary_transform.hpp
@@ -0,0 +1,146 @@
+/*
+ *
+ * Copyright (c) 1998-2002
+ * John Maddock
+ *
+ * Use, modification and distribution are subject to the
+ * Boost Software License, Version 1.0. (See accompanying file
+ * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ *
+ */
+
+ /*
+ * LOCATION: see http://www.boost.org for most recent version.
+ * FILE: primary_transform.hpp
+ * VERSION: see <ndnboost/version.hpp>
+ * DESCRIPTION: Heuristically determines the sort string format in use
+ * by the current locale.
+ */
+
+#ifndef NDNBOOST_REGEX_PRIMARY_TRANSFORM
+#define NDNBOOST_REGEX_PRIMARY_TRANSFORM
+
+#ifdef NDNBOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable: 4103)
+#endif
+#ifdef NDNBOOST_HAS_ABI_HEADERS
+# include NDNBOOST_ABI_PREFIX
+#endif
+#ifdef NDNBOOST_MSVC
+#pragma warning(pop)
+#endif
+
+namespace ndnboost{
+ namespace re_detail{
+
+
+enum{
+ sort_C,
+ sort_fixed,
+ sort_delim,
+ sort_unknown
+};
+
+template <class S, class charT>
+unsigned count_chars(const S& s, charT c)
+{
+ //
+ // Count how many occurances of character c occur
+ // in string s: if c is a delimeter between collation
+ // fields, then this should be the same value for all
+ // sort keys:
+ //
+ unsigned int count = 0;
+ for(unsigned pos = 0; pos < s.size(); ++pos)
+ {
+ if(s[pos] == c) ++count;
+ }
+ return count;
+}
+
+
+template <class traits, class charT>
+unsigned find_sort_syntax(const traits* pt, charT* delim)
+{
+ //
+ // compare 'a' with 'A' to see how similar they are,
+ // should really use a-accute but we can't portably do that,
+ //
+ typedef typename traits::string_type string_type;
+ typedef typename traits::char_type char_type;
+
+ // Suppress incorrect warning for MSVC
+ (void)pt;
+
+ char_type a[2] = {'a', '\0', };
+ string_type sa(pt->transform(a, a+1));
+ if(sa == a)
+ {
+ *delim = 0;
+ return sort_C;
+ }
+ char_type A[2] = { 'A', '\0', };
+ string_type sA(pt->transform(A, A+1));
+ char_type c[2] = { ';', '\0', };
+ string_type sc(pt->transform(c, c+1));
+
+ int pos = 0;
+ while((pos <= static_cast<int>(sa.size())) && (pos <= static_cast<int>(sA.size())) && (sa[pos] == sA[pos])) ++pos;
+ --pos;
+ if(pos < 0)
+ {
+ *delim = 0;
+ return sort_unknown;
+ }
+ //
+ // at this point sa[pos] is either the end of a fixed width field
+ // or the character that acts as a delimiter:
+ //
+ charT maybe_delim = sa[pos];
+ if((pos != 0) && (count_chars(sa, maybe_delim) == count_chars(sA, maybe_delim)) && (count_chars(sa, maybe_delim) == count_chars(sc, maybe_delim)))
+ {
+ *delim = maybe_delim;
+ return sort_delim;
+ }
+ //
+ // OK doen't look like a delimiter, try for fixed width field:
+ //
+ if((sa.size() == sA.size()) && (sa.size() == sc.size()))
+ {
+ // note assumes that the fixed width field is less than
+ // (numeric_limits<charT>::max)(), should be true for all types
+ // I can't imagine 127 character fields...
+ *delim = static_cast<charT>(++pos);
+ return sort_fixed;
+ }
+ //
+ // don't know what it is:
+ //
+ *delim = 0;
+ return sort_unknown;
+}
+
+
+ } // namespace re_detail
+} // namespace ndnboost
+
+#ifdef NDNBOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable: 4103)
+#endif
+#ifdef NDNBOOST_HAS_ABI_HEADERS
+# include NDNBOOST_ABI_SUFFIX
+#endif
+#ifdef NDNBOOST_MSVC
+#pragma warning(pop)
+#endif
+
+#endif
+
+
+
+
+
+
+