// Copyright 2006 Nemanja Trifunovic /* Permission is hereby granted, free of charge, to any person or organization obtaining a copy of the software and accompanying documentation covered by this license (the "Software") to use, reproduce, display, distribute, execute, and transmit the Software, and to prepare derivative works of the Software, and to permit third-parties to whom the Software is furnished to do so, all subject to the following: The copyright notices in the Software and this entire statement, including the above license grant, this restriction and the following disclaimer, must be included in all copies of the Software, in whole or in part, and all derivative works of the Software, unless such copies or derivative works are solely in the form of machine-executable object code generated by a source language processor. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef UTF8_FOR_CPP_UNCHECKED_H_2675DCD0_9480_4c0c_B92A_CC14C027B731 #define UTF8_FOR_CPP_UNCHECKED_H_2675DCD0_9480_4c0c_B92A_CC14C027B731 #include "core.h" namespace vtk_utf8 { namespace unchecked { template octet_iterator append(uint32_t cp, octet_iterator result) { if (cp < 0x80) // one octet *(result++) = static_cast(cp); else if (cp < 0x800) { // two octets *(result++) = static_cast((cp >> 6) | 0xc0); *(result++) = static_cast((cp & 0x3f) | 0x80); } else if (cp < 0x10000) { // three octets *(result++) = static_cast((cp >> 12) | 0xe0); *(result++) = static_cast(((cp >> 6) & 0x3f) | 0x80); *(result++) = static_cast((cp & 0x3f) | 0x80); } else { // four octets *(result++) = static_cast((cp >> 18) | 0xf0); *(result++) = static_cast(((cp >> 12) & 0x3f)| 0x80); *(result++) = static_cast(((cp >> 6) & 0x3f) | 0x80); *(result++) = static_cast((cp & 0x3f) | 0x80); } return result; } template uint32_t next(octet_iterator& it) { uint32_t cp = vtk_utf8::internal::mask8(*it); typename std::iterator_traits::difference_type length = vtk_utf8::internal::sequence_length(it); switch (length) { case 1: break; case 2: it++; cp = ((cp << 6) & 0x7ff) + ((*it) & 0x3f); break; case 3: ++it; cp = ((cp << 12) & 0xffff) + ((vtk_utf8::internal::mask8(*it) << 6) & 0xfff); ++it; cp += (*it) & 0x3f; break; case 4: ++it; cp = ((cp << 18) & 0x1fffff) + ((vtk_utf8::internal::mask8(*it) << 12) & 0x3ffff); ++it; cp += (vtk_utf8::internal::mask8(*it) << 6) & 0xfff; ++it; cp += (*it) & 0x3f; break; } ++it; return cp; } template uint32_t peek_next(octet_iterator it) { return vtk_utf8::unchecked::next(it); } template uint32_t prior(octet_iterator& it) { while (vtk_utf8::internal::is_trail(*(--it))) ; octet_iterator temp = it; return vtk_utf8::unchecked::next(temp); } // Deprecated in versions that include prior, but only for the sake of consistency (see vtk_utf8::previous) template inline uint32_t previous(octet_iterator& it) { return vtk_utf8::unchecked::prior(it); } template void advance (octet_iterator& it, distance_type n) { for (distance_type i = 0; i < n; ++i) vtk_utf8::unchecked::next(it); } template typename std::iterator_traits::difference_type distance (octet_iterator first, octet_iterator last) { typename std::iterator_traits::difference_type dist; for (dist = 0; first < last; ++dist) vtk_utf8::unchecked::next(first); return dist; } template octet_iterator utf16to8 (u16bit_iterator start, u16bit_iterator end, octet_iterator result) { while (start != end) { uint32_t cp = vtk_utf8::internal::mask16(*start++); // Take care of surrogate pairs first if (vtk_utf8::internal::is_lead_surrogate(cp)) { uint32_t trail_surrogate = vtk_utf8::internal::mask16(*start++); cp = (cp << 10) + trail_surrogate + internal::SURROGATE_OFFSET; } result = vtk_utf8::unchecked::append(cp, result); } return result; } template u16bit_iterator utf8to16 (octet_iterator start, octet_iterator end, u16bit_iterator result) { while (start < end) { uint32_t cp = vtk_utf8::unchecked::next(start); if (cp > 0xffff) { //make a surrogate pair *result++ = static_cast((cp >> 10) + internal::LEAD_OFFSET); *result++ = static_cast((cp & 0x3ff) + internal::TRAIL_SURROGATE_MIN); } else *result++ = static_cast(cp); } return result; } template octet_iterator utf32to8 (u32bit_iterator start, u32bit_iterator end, octet_iterator result) { while (start != end) result = vtk_utf8::unchecked::append(*(start++), result); return result; } template u32bit_iterator utf8to32 (octet_iterator start, octet_iterator end, u32bit_iterator result) { while (start < end) (*result++) = vtk_utf8::unchecked::next(start); return result; } // The iterator class template class iterator : public std::iterator { octet_iterator it; public: iterator () {} explicit iterator (const octet_iterator& octet_it): it(octet_it) {} // the default "big three" are OK octet_iterator base () const { return it; } uint32_t operator * () const { octet_iterator temp = it; return vtk_utf8::unchecked::next(temp); } bool operator == (const iterator& rhs) const { return (it == rhs.it); } bool operator != (const iterator& rhs) const { return !(operator == (rhs)); } iterator& operator ++ () { ::std::advance(it, vtk_utf8::internal::sequence_length(it)); return *this; } iterator operator ++ (int) { iterator temp = *this; ::std::advance(it, vtk_utf8::internal::sequence_length(it)); return temp; } iterator& operator -- () { vtk_utf8::unchecked::prior(it); return *this; } iterator operator -- (int) { iterator temp = *this; vtk_utf8::unchecked::prior(it); return temp; } }; // class iterator } // namespace vtk_utf8::unchecked } // namespace vtk_utf8 #endif // header guard