ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/regex/pending/unicode_iterator.hpp b/include/ndnboost/regex/pending/unicode_iterator.hpp
new file mode 100644
index 0000000..d66d3b9
--- /dev/null
+++ b/include/ndnboost/regex/pending/unicode_iterator.hpp
@@ -0,0 +1,776 @@
+/*
+ *
+ * Copyright (c) 2004
+ * 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 unicode_iterator.hpp
+ * VERSION see <ndnboost/version.hpp>
+ * DESCRIPTION: Iterator adapters for converting between different Unicode encodings.
+ */
+
+/****************************************************************************
+
+Contents:
+~~~~~~~~~
+
+1) Read Only, Input Adapters:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+template <class BaseIterator, class U8Type = ::ndnboost::uint8_t>
+class u32_to_u8_iterator;
+
+Adapts sequence of UTF-32 code points to "look like" a sequence of UTF-8.
+
+template <class BaseIterator, class U32Type = ::ndnboost::uint32_t>
+class u8_to_u32_iterator;
+
+Adapts sequence of UTF-8 code points to "look like" a sequence of UTF-32.
+
+template <class BaseIterator, class U16Type = ::ndnboost::uint16_t>
+class u32_to_u16_iterator;
+
+Adapts sequence of UTF-32 code points to "look like" a sequence of UTF-16.
+
+template <class BaseIterator, class U32Type = ::ndnboost::uint32_t>
+class u16_to_u32_iterator;
+
+Adapts sequence of UTF-16 code points to "look like" a sequence of UTF-32.
+
+2) Single pass output iterator adapters:
+
+template <class BaseIterator>
+class utf8_output_iterator;
+
+Accepts UTF-32 code points and forwards them on as UTF-8 code points.
+
+template <class BaseIterator>
+class utf16_output_iterator;
+
+Accepts UTF-32 code points and forwards them on as UTF-16 code points.
+
+****************************************************************************/
+
+#ifndef NDNBOOST_REGEX_UNICODE_ITERATOR_HPP
+#define NDNBOOST_REGEX_UNICODE_ITERATOR_HPP
+#include <ndnboost/cstdint.hpp>
+#include <ndnboost/assert.hpp>
+#include <ndnboost/iterator/iterator_facade.hpp>
+#include <ndnboost/static_assert.hpp>
+#include <ndnboost/throw_exception.hpp>
+#include <stdexcept>
+#ifndef NDNBOOST_NO_STD_LOCALE
+#include <sstream>
+#include <ios>
+#endif
+#include <limits.h> // CHAR_BIT
+
+namespace ndnboost{
+
+namespace detail{
+
+static const ::ndnboost::uint16_t high_surrogate_base = 0xD7C0u;
+static const ::ndnboost::uint16_t low_surrogate_base = 0xDC00u;
+static const ::ndnboost::uint32_t ten_bit_mask = 0x3FFu;
+
+inline bool is_high_surrogate(::ndnboost::uint16_t v)
+{
+ return (v & 0xFFFFFC00u) == 0xd800u;
+}
+inline bool is_low_surrogate(::ndnboost::uint16_t v)
+{
+ return (v & 0xFFFFFC00u) == 0xdc00u;
+}
+template <class T>
+inline bool is_surrogate(T v)
+{
+ return (v & 0xFFFFF800u) == 0xd800;
+}
+
+inline unsigned utf8_byte_count(ndnboost::uint8_t c)
+{
+ // if the most significant bit with a zero in it is in position
+ // 8-N then there are N bytes in this UTF-8 sequence:
+ ndnboost::uint8_t mask = 0x80u;
+ unsigned result = 0;
+ while(c & mask)
+ {
+ ++result;
+ mask >>= 1;
+ }
+ return (result == 0) ? 1 : ((result > 4) ? 4 : result);
+}
+
+inline unsigned utf8_trailing_byte_count(ndnboost::uint8_t c)
+{
+ return utf8_byte_count(c) - 1;
+}
+
+#ifdef NDNBOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable:4100)
+#endif
+inline void invalid_utf32_code_point(::ndnboost::uint32_t val)
+{
+#ifndef NDNBOOST_NO_STD_LOCALE
+ std::stringstream ss;
+ ss << "Invalid UTF-32 code point U+" << std::showbase << std::hex << val << " encountered while trying to encode UTF-16 sequence";
+ std::out_of_range e(ss.str());
+#else
+ std::out_of_range e("Invalid UTF-32 code point encountered while trying to encode UTF-16 sequence");
+#endif
+ ndnboost::throw_exception(e);
+}
+#ifdef NDNBOOST_MSVC
+#pragma warning(pop)
+#endif
+
+
+} // namespace detail
+
+template <class BaseIterator, class U16Type = ::ndnboost::uint16_t>
+class u32_to_u16_iterator
+ : public ndnboost::iterator_facade<u32_to_u16_iterator<BaseIterator, U16Type>, U16Type, std::bidirectional_iterator_tag, const U16Type>
+{
+ typedef ndnboost::iterator_facade<u32_to_u16_iterator<BaseIterator, U16Type>, U16Type, std::bidirectional_iterator_tag, const U16Type> base_type;
+
+#if !defined(NDNBOOST_NO_STD_ITERATOR_TRAITS) && !defined(NDNBOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+ typedef typename std::iterator_traits<BaseIterator>::value_type base_value_type;
+
+ NDNBOOST_STATIC_ASSERT(sizeof(base_value_type)*CHAR_BIT == 32);
+ NDNBOOST_STATIC_ASSERT(sizeof(U16Type)*CHAR_BIT == 16);
+#endif
+
+public:
+ typename base_type::reference
+ dereference()const
+ {
+ if(m_current == 2)
+ extract_current();
+ return m_values[m_current];
+ }
+ bool equal(const u32_to_u16_iterator& that)const
+ {
+ if(m_position == that.m_position)
+ {
+ // Both m_currents must be equal, or both even
+ // this is the same as saying their sum must be even:
+ return (m_current + that.m_current) & 1u ? false : true;
+ }
+ return false;
+ }
+ void increment()
+ {
+ // if we have a pending read then read now, so that we know whether
+ // to skip a position, or move to a low-surrogate:
+ if(m_current == 2)
+ {
+ // pending read:
+ extract_current();
+ }
+ // move to the next surrogate position:
+ ++m_current;
+ // if we've reached the end skip a position:
+ if(m_values[m_current] == 0)
+ {
+ m_current = 2;
+ ++m_position;
+ }
+ }
+ void decrement()
+ {
+ if(m_current != 1)
+ {
+ // decrementing an iterator always leads to a valid position:
+ --m_position;
+ extract_current();
+ m_current = m_values[1] ? 1 : 0;
+ }
+ else
+ {
+ m_current = 0;
+ }
+ }
+ BaseIterator base()const
+ {
+ return m_position;
+ }
+ // construct:
+ u32_to_u16_iterator() : m_position(), m_current(0)
+ {
+ m_values[0] = 0;
+ m_values[1] = 0;
+ m_values[2] = 0;
+ }
+ u32_to_u16_iterator(BaseIterator b) : m_position(b), m_current(2)
+ {
+ m_values[0] = 0;
+ m_values[1] = 0;
+ m_values[2] = 0;
+ }
+private:
+
+ void extract_current()const
+ {
+ // begin by checking for a code point out of range:
+ ::ndnboost::uint32_t v = *m_position;
+ if(v >= 0x10000u)
+ {
+ if(v > 0x10FFFFu)
+ detail::invalid_utf32_code_point(*m_position);
+ // split into two surrogates:
+ m_values[0] = static_cast<U16Type>(v >> 10) + detail::high_surrogate_base;
+ m_values[1] = static_cast<U16Type>(v & detail::ten_bit_mask) + detail::low_surrogate_base;
+ m_current = 0;
+ NDNBOOST_ASSERT(detail::is_high_surrogate(m_values[0]));
+ NDNBOOST_ASSERT(detail::is_low_surrogate(m_values[1]));
+ }
+ else
+ {
+ // 16-bit code point:
+ m_values[0] = static_cast<U16Type>(*m_position);
+ m_values[1] = 0;
+ m_current = 0;
+ // value must not be a surrogate:
+ if(detail::is_surrogate(m_values[0]))
+ detail::invalid_utf32_code_point(*m_position);
+ }
+ }
+ BaseIterator m_position;
+ mutable U16Type m_values[3];
+ mutable unsigned m_current;
+};
+
+template <class BaseIterator, class U32Type = ::ndnboost::uint32_t>
+class u16_to_u32_iterator
+ : public ndnboost::iterator_facade<u16_to_u32_iterator<BaseIterator, U32Type>, U32Type, std::bidirectional_iterator_tag, const U32Type>
+{
+ typedef ndnboost::iterator_facade<u16_to_u32_iterator<BaseIterator, U32Type>, U32Type, std::bidirectional_iterator_tag, const U32Type> base_type;
+ // special values for pending iterator reads:
+ NDNBOOST_STATIC_CONSTANT(U32Type, pending_read = 0xffffffffu);
+
+#if !defined(NDNBOOST_NO_STD_ITERATOR_TRAITS) && !defined(NDNBOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+ typedef typename std::iterator_traits<BaseIterator>::value_type base_value_type;
+
+ NDNBOOST_STATIC_ASSERT(sizeof(base_value_type)*CHAR_BIT == 16);
+ NDNBOOST_STATIC_ASSERT(sizeof(U32Type)*CHAR_BIT == 32);
+#endif
+
+public:
+ typename base_type::reference
+ dereference()const
+ {
+ if(m_value == pending_read)
+ extract_current();
+ return m_value;
+ }
+ bool equal(const u16_to_u32_iterator& that)const
+ {
+ return m_position == that.m_position;
+ }
+ void increment()
+ {
+ // skip high surrogate first if there is one:
+ if(detail::is_high_surrogate(*m_position)) ++m_position;
+ ++m_position;
+ m_value = pending_read;
+ }
+ void decrement()
+ {
+ --m_position;
+ // if we have a low surrogate then go back one more:
+ if(detail::is_low_surrogate(*m_position))
+ --m_position;
+ m_value = pending_read;
+ }
+ BaseIterator base()const
+ {
+ return m_position;
+ }
+ // construct:
+ u16_to_u32_iterator() : m_position()
+ {
+ m_value = pending_read;
+ }
+ u16_to_u32_iterator(BaseIterator b) : m_position(b)
+ {
+ m_value = pending_read;
+ }
+ //
+ // Range checked version:
+ //
+ u16_to_u32_iterator(BaseIterator b, BaseIterator start, BaseIterator end) : m_position(b)
+ {
+ m_value = pending_read;
+ //
+ // The range must not start with a low surrogate, or end in a high surrogate,
+ // otherwise we run the risk of running outside the underlying input range.
+ // Likewise b must not be located at a low surrogate.
+ //
+ ndnboost::uint16_t val;
+ if(start != end)
+ {
+ if((b != start) && (b != end))
+ {
+ val = *b;
+ if(detail::is_surrogate(val) && ((val & 0xFC00u) == 0xDC00u))
+ invalid_code_point(val);
+ }
+ val = *start;
+ if(detail::is_surrogate(val) && ((val & 0xFC00u) == 0xDC00u))
+ invalid_code_point(val);
+ val = *--end;
+ if(detail::is_high_surrogate(val))
+ invalid_code_point(val);
+ }
+ }
+private:
+ static void invalid_code_point(::ndnboost::uint16_t val)
+ {
+#ifndef NDNBOOST_NO_STD_LOCALE
+ std::stringstream ss;
+ ss << "Misplaced UTF-16 surrogate U+" << std::showbase << std::hex << val << " encountered while trying to encode UTF-32 sequence";
+ std::out_of_range e(ss.str());
+#else
+ std::out_of_range e("Misplaced UTF-16 surrogate encountered while trying to encode UTF-32 sequence");
+#endif
+ ndnboost::throw_exception(e);
+ }
+ void extract_current()const
+ {
+ m_value = static_cast<U32Type>(static_cast< ::ndnboost::uint16_t>(*m_position));
+ // if the last value is a high surrogate then adjust m_position and m_value as needed:
+ if(detail::is_high_surrogate(*m_position))
+ {
+ // precondition; next value must have be a low-surrogate:
+ BaseIterator next(m_position);
+ ::ndnboost::uint16_t t = *++next;
+ if((t & 0xFC00u) != 0xDC00u)
+ invalid_code_point(t);
+ m_value = (m_value - detail::high_surrogate_base) << 10;
+ m_value |= (static_cast<U32Type>(static_cast< ::ndnboost::uint16_t>(t)) & detail::ten_bit_mask);
+ }
+ // postcondition; result must not be a surrogate:
+ if(detail::is_surrogate(m_value))
+ invalid_code_point(static_cast< ::ndnboost::uint16_t>(m_value));
+ }
+ BaseIterator m_position;
+ mutable U32Type m_value;
+};
+
+template <class BaseIterator, class U8Type = ::ndnboost::uint8_t>
+class u32_to_u8_iterator
+ : public ndnboost::iterator_facade<u32_to_u8_iterator<BaseIterator, U8Type>, U8Type, std::bidirectional_iterator_tag, const U8Type>
+{
+ typedef ndnboost::iterator_facade<u32_to_u8_iterator<BaseIterator, U8Type>, U8Type, std::bidirectional_iterator_tag, const U8Type> base_type;
+
+#if !defined(NDNBOOST_NO_STD_ITERATOR_TRAITS) && !defined(NDNBOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+ typedef typename std::iterator_traits<BaseIterator>::value_type base_value_type;
+
+ NDNBOOST_STATIC_ASSERT(sizeof(base_value_type)*CHAR_BIT == 32);
+ NDNBOOST_STATIC_ASSERT(sizeof(U8Type)*CHAR_BIT == 8);
+#endif
+
+public:
+ typename base_type::reference
+ dereference()const
+ {
+ if(m_current == 4)
+ extract_current();
+ return m_values[m_current];
+ }
+ bool equal(const u32_to_u8_iterator& that)const
+ {
+ if(m_position == that.m_position)
+ {
+ // either the m_current's must be equal, or one must be 0 and
+ // the other 4: which means neither must have bits 1 or 2 set:
+ return (m_current == that.m_current)
+ || (((m_current | that.m_current) & 3) == 0);
+ }
+ return false;
+ }
+ void increment()
+ {
+ // if we have a pending read then read now, so that we know whether
+ // to skip a position, or move to a low-surrogate:
+ if(m_current == 4)
+ {
+ // pending read:
+ extract_current();
+ }
+ // move to the next surrogate position:
+ ++m_current;
+ // if we've reached the end skip a position:
+ if(m_values[m_current] == 0)
+ {
+ m_current = 4;
+ ++m_position;
+ }
+ }
+ void decrement()
+ {
+ if((m_current & 3) == 0)
+ {
+ --m_position;
+ extract_current();
+ m_current = 3;
+ while(m_current && (m_values[m_current] == 0))
+ --m_current;
+ }
+ else
+ --m_current;
+ }
+ BaseIterator base()const
+ {
+ return m_position;
+ }
+ // construct:
+ u32_to_u8_iterator() : m_position(), m_current(0)
+ {
+ m_values[0] = 0;
+ m_values[1] = 0;
+ m_values[2] = 0;
+ m_values[3] = 0;
+ m_values[4] = 0;
+ }
+ u32_to_u8_iterator(BaseIterator b) : m_position(b), m_current(4)
+ {
+ m_values[0] = 0;
+ m_values[1] = 0;
+ m_values[2] = 0;
+ m_values[3] = 0;
+ m_values[4] = 0;
+ }
+private:
+
+ void extract_current()const
+ {
+ ndnboost::uint32_t c = *m_position;
+ if(c > 0x10FFFFu)
+ detail::invalid_utf32_code_point(c);
+ if(c < 0x80u)
+ {
+ m_values[0] = static_cast<unsigned char>(c);
+ m_values[1] = static_cast<unsigned char>(0u);
+ m_values[2] = static_cast<unsigned char>(0u);
+ m_values[3] = static_cast<unsigned char>(0u);
+ }
+ else if(c < 0x800u)
+ {
+ m_values[0] = static_cast<unsigned char>(0xC0u + (c >> 6));
+ m_values[1] = static_cast<unsigned char>(0x80u + (c & 0x3Fu));
+ m_values[2] = static_cast<unsigned char>(0u);
+ m_values[3] = static_cast<unsigned char>(0u);
+ }
+ else if(c < 0x10000u)
+ {
+ m_values[0] = static_cast<unsigned char>(0xE0u + (c >> 12));
+ m_values[1] = static_cast<unsigned char>(0x80u + ((c >> 6) & 0x3Fu));
+ m_values[2] = static_cast<unsigned char>(0x80u + (c & 0x3Fu));
+ m_values[3] = static_cast<unsigned char>(0u);
+ }
+ else
+ {
+ m_values[0] = static_cast<unsigned char>(0xF0u + (c >> 18));
+ m_values[1] = static_cast<unsigned char>(0x80u + ((c >> 12) & 0x3Fu));
+ m_values[2] = static_cast<unsigned char>(0x80u + ((c >> 6) & 0x3Fu));
+ m_values[3] = static_cast<unsigned char>(0x80u + (c & 0x3Fu));
+ }
+ m_current= 0;
+ }
+ BaseIterator m_position;
+ mutable U8Type m_values[5];
+ mutable unsigned m_current;
+};
+
+template <class BaseIterator, class U32Type = ::ndnboost::uint32_t>
+class u8_to_u32_iterator
+ : public ndnboost::iterator_facade<u8_to_u32_iterator<BaseIterator, U32Type>, U32Type, std::bidirectional_iterator_tag, const U32Type>
+{
+ typedef ndnboost::iterator_facade<u8_to_u32_iterator<BaseIterator, U32Type>, U32Type, std::bidirectional_iterator_tag, const U32Type> base_type;
+ // special values for pending iterator reads:
+ NDNBOOST_STATIC_CONSTANT(U32Type, pending_read = 0xffffffffu);
+
+#if !defined(NDNBOOST_NO_STD_ITERATOR_TRAITS) && !defined(NDNBOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+ typedef typename std::iterator_traits<BaseIterator>::value_type base_value_type;
+
+ NDNBOOST_STATIC_ASSERT(sizeof(base_value_type)*CHAR_BIT == 8);
+ NDNBOOST_STATIC_ASSERT(sizeof(U32Type)*CHAR_BIT == 32);
+#endif
+
+public:
+ typename base_type::reference
+ dereference()const
+ {
+ if(m_value == pending_read)
+ extract_current();
+ return m_value;
+ }
+ bool equal(const u8_to_u32_iterator& that)const
+ {
+ return m_position == that.m_position;
+ }
+ void increment()
+ {
+ // We must not start with a continuation character:
+ if((static_cast<ndnboost::uint8_t>(*m_position) & 0xC0) == 0x80)
+ invalid_sequence();
+ // skip high surrogate first if there is one:
+ unsigned c = detail::utf8_byte_count(*m_position);
+ if(m_value == pending_read)
+ {
+ // Since we haven't read in a value, we need to validate the code points:
+ for(unsigned i = 0; i < c; ++i)
+ {
+ ++m_position;
+ // We must have a continuation byte:
+ if((i != c - 1) && ((static_cast<ndnboost::uint8_t>(*m_position) & 0xC0) != 0x80))
+ invalid_sequence();
+ }
+ }
+ else
+ {
+ std::advance(m_position, c);
+ }
+ m_value = pending_read;
+ }
+ void decrement()
+ {
+ // Keep backtracking until we don't have a trailing character:
+ unsigned count = 0;
+ while((*--m_position & 0xC0u) == 0x80u) ++count;
+ // now check that the sequence was valid:
+ if(count != detail::utf8_trailing_byte_count(*m_position))
+ invalid_sequence();
+ m_value = pending_read;
+ }
+ BaseIterator base()const
+ {
+ return m_position;
+ }
+ // construct:
+ u8_to_u32_iterator() : m_position()
+ {
+ m_value = pending_read;
+ }
+ u8_to_u32_iterator(BaseIterator b) : m_position(b)
+ {
+ m_value = pending_read;
+ }
+ //
+ // Checked constructor:
+ //
+ u8_to_u32_iterator(BaseIterator b, BaseIterator start, BaseIterator end) : m_position(b)
+ {
+ m_value = pending_read;
+ //
+ // We must not start with a continuation character, or end with a
+ // truncated UTF-8 sequence otherwise we run the risk of going past
+ // the start/end of the underlying sequence:
+ //
+ if(start != end)
+ {
+ unsigned char v = *start;
+ if((v & 0xC0u) == 0x80u)
+ invalid_sequence();
+ if((b != start) && (b != end) && ((*b & 0xC0u) == 0x80u))
+ invalid_sequence();
+ BaseIterator pos = end;
+ do
+ {
+ v = *--pos;
+ }
+ while((start != pos) && ((v & 0xC0u) == 0x80u));
+ std::ptrdiff_t extra = detail::utf8_byte_count(v);
+ if(std::distance(pos, end) < extra)
+ invalid_sequence();
+ }
+ }
+private:
+ static void invalid_sequence()
+ {
+ std::out_of_range e("Invalid UTF-8 sequence encountered while trying to encode UTF-32 character");
+ ndnboost::throw_exception(e);
+ }
+ void extract_current()const
+ {
+ m_value = static_cast<U32Type>(static_cast< ::ndnboost::uint8_t>(*m_position));
+ // we must not have a continuation character:
+ if((m_value & 0xC0u) == 0x80u)
+ invalid_sequence();
+ // see how many extra bytes we have:
+ unsigned extra = detail::utf8_trailing_byte_count(*m_position);
+ // extract the extra bits, 6 from each extra byte:
+ BaseIterator next(m_position);
+ for(unsigned c = 0; c < extra; ++c)
+ {
+ ++next;
+ m_value <<= 6;
+ // We must have a continuation byte:
+ if((static_cast<ndnboost::uint8_t>(*next) & 0xC0) != 0x80)
+ invalid_sequence();
+ m_value += static_cast<ndnboost::uint8_t>(*next) & 0x3Fu;
+ }
+ // we now need to remove a few of the leftmost bits, but how many depends
+ // upon how many extra bytes we've extracted:
+ static const ndnboost::uint32_t masks[4] =
+ {
+ 0x7Fu,
+ 0x7FFu,
+ 0xFFFFu,
+ 0x1FFFFFu,
+ };
+ m_value &= masks[extra];
+ // check the result:
+ if(m_value > static_cast<U32Type>(0x10FFFFu))
+ invalid_sequence();
+ }
+ BaseIterator m_position;
+ mutable U32Type m_value;
+};
+
+template <class BaseIterator>
+class utf16_output_iterator
+{
+public:
+ typedef void difference_type;
+ typedef void value_type;
+ typedef ndnboost::uint32_t* pointer;
+ typedef ndnboost::uint32_t& reference;
+ typedef std::output_iterator_tag iterator_category;
+
+ utf16_output_iterator(const BaseIterator& b)
+ : m_position(b){}
+ utf16_output_iterator(const utf16_output_iterator& that)
+ : m_position(that.m_position){}
+ utf16_output_iterator& operator=(const utf16_output_iterator& that)
+ {
+ m_position = that.m_position;
+ return *this;
+ }
+ const utf16_output_iterator& operator*()const
+ {
+ return *this;
+ }
+ void operator=(ndnboost::uint32_t val)const
+ {
+ push(val);
+ }
+ utf16_output_iterator& operator++()
+ {
+ return *this;
+ }
+ utf16_output_iterator& operator++(int)
+ {
+ return *this;
+ }
+ BaseIterator base()const
+ {
+ return m_position;
+ }
+private:
+ void push(ndnboost::uint32_t v)const
+ {
+ if(v >= 0x10000u)
+ {
+ // begin by checking for a code point out of range:
+ if(v > 0x10FFFFu)
+ detail::invalid_utf32_code_point(v);
+ // split into two surrogates:
+ *m_position++ = static_cast<ndnboost::uint16_t>(v >> 10) + detail::high_surrogate_base;
+ *m_position++ = static_cast<ndnboost::uint16_t>(v & detail::ten_bit_mask) + detail::low_surrogate_base;
+ }
+ else
+ {
+ // 16-bit code point:
+ // value must not be a surrogate:
+ if(detail::is_surrogate(v))
+ detail::invalid_utf32_code_point(v);
+ *m_position++ = static_cast<ndnboost::uint16_t>(v);
+ }
+ }
+ mutable BaseIterator m_position;
+};
+
+template <class BaseIterator>
+class utf8_output_iterator
+{
+public:
+ typedef void difference_type;
+ typedef void value_type;
+ typedef ndnboost::uint32_t* pointer;
+ typedef ndnboost::uint32_t& reference;
+ typedef std::output_iterator_tag iterator_category;
+
+ utf8_output_iterator(const BaseIterator& b)
+ : m_position(b){}
+ utf8_output_iterator(const utf8_output_iterator& that)
+ : m_position(that.m_position){}
+ utf8_output_iterator& operator=(const utf8_output_iterator& that)
+ {
+ m_position = that.m_position;
+ return *this;
+ }
+ const utf8_output_iterator& operator*()const
+ {
+ return *this;
+ }
+ void operator=(ndnboost::uint32_t val)const
+ {
+ push(val);
+ }
+ utf8_output_iterator& operator++()
+ {
+ return *this;
+ }
+ utf8_output_iterator& operator++(int)
+ {
+ return *this;
+ }
+ BaseIterator base()const
+ {
+ return m_position;
+ }
+private:
+ void push(ndnboost::uint32_t c)const
+ {
+ if(c > 0x10FFFFu)
+ detail::invalid_utf32_code_point(c);
+ if(c < 0x80u)
+ {
+ *m_position++ = static_cast<unsigned char>(c);
+ }
+ else if(c < 0x800u)
+ {
+ *m_position++ = static_cast<unsigned char>(0xC0u + (c >> 6));
+ *m_position++ = static_cast<unsigned char>(0x80u + (c & 0x3Fu));
+ }
+ else if(c < 0x10000u)
+ {
+ *m_position++ = static_cast<unsigned char>(0xE0u + (c >> 12));
+ *m_position++ = static_cast<unsigned char>(0x80u + ((c >> 6) & 0x3Fu));
+ *m_position++ = static_cast<unsigned char>(0x80u + (c & 0x3Fu));
+ }
+ else
+ {
+ *m_position++ = static_cast<unsigned char>(0xF0u + (c >> 18));
+ *m_position++ = static_cast<unsigned char>(0x80u + ((c >> 12) & 0x3Fu));
+ *m_position++ = static_cast<unsigned char>(0x80u + ((c >> 6) & 0x3Fu));
+ *m_position++ = static_cast<unsigned char>(0x80u + (c & 0x3Fu));
+ }
+ }
+ mutable BaseIterator m_position;
+};
+
+} // namespace ndnboost
+
+#endif // NDNBOOST_REGEX_UNICODE_ITERATOR_HPP
+