Implemented feature request ID: 2515238; renamed an internal enum to avoid conflicts with macros from other libraries
git-svn-id: http://svn.code.sf.net/p/utfcpp/code@85 a809a056-fc17-0410-9590-b4f493f8b08e
This commit is contained in:
parent
c92c41770d
commit
76c6662ef9
2 changed files with 42 additions and 42 deletions
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@ -64,7 +64,7 @@ namespace utf8
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};
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};
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/// The library API - functions intended to be called by the users
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/// The library API - functions intended to be called by the users
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template <typename octet_iterator, typename output_iterator>
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template <typename octet_iterator, typename output_iterator>
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output_iterator replace_invalid(octet_iterator start, octet_iterator end, output_iterator out, uint32_t replacement)
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output_iterator replace_invalid(octet_iterator start, octet_iterator end, output_iterator out, uint32_t replacement)
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{
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{
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@ -72,7 +72,7 @@ namespace utf8
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octet_iterator sequence_start = start;
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octet_iterator sequence_start = start;
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internal::utf_error err_code = internal::validate_next(start, end);
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internal::utf_error err_code = internal::validate_next(start, end);
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switch (err_code) {
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switch (err_code) {
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case internal::OK :
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case internal::UTF8_OK :
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for (octet_iterator it = sequence_start; it != start; ++it)
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for (octet_iterator it = sequence_start; it != start; ++it)
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*out++ = *it;
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*out++ = *it;
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break;
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break;
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@ -92,7 +92,7 @@ namespace utf8
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++start;
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++start;
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break;
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break;
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}
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}
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}
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}
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return out;
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return out;
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}
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}
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@ -106,11 +106,11 @@ namespace utf8
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template <typename octet_iterator>
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template <typename octet_iterator>
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octet_iterator append(uint32_t cp, octet_iterator result)
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octet_iterator append(uint32_t cp, octet_iterator result)
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{
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{
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if (!internal::is_code_point_valid(cp))
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if (!internal::is_code_point_valid(cp))
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throw invalid_code_point(cp);
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throw invalid_code_point(cp);
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if (cp < 0x80) // one octet
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if (cp < 0x80) // one octet
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*(result++) = static_cast<uint8_t>(cp);
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*(result++) = static_cast<uint8_t>(cp);
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else if (cp < 0x800) { // two octets
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else if (cp < 0x800) { // two octets
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*(result++) = static_cast<uint8_t>((cp >> 6) | 0xc0);
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*(result++) = static_cast<uint8_t>((cp >> 6) | 0xc0);
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*(result++) = static_cast<uint8_t>((cp & 0x3f) | 0x80);
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*(result++) = static_cast<uint8_t>((cp & 0x3f) | 0x80);
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@ -138,7 +138,7 @@ namespace utf8
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uint32_t cp = 0;
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uint32_t cp = 0;
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internal::utf_error err_code = internal::validate_next(it, end, &cp);
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internal::utf_error err_code = internal::validate_next(it, end, &cp);
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switch (err_code) {
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switch (err_code) {
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case internal::OK :
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case internal::UTF8_OK :
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break;
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break;
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case internal::NOT_ENOUGH_ROOM :
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case internal::NOT_ENOUGH_ROOM :
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throw not_enough_room();
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throw not_enough_room();
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@ -149,7 +149,7 @@ namespace utf8
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case internal::INVALID_CODE_POINT :
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case internal::INVALID_CODE_POINT :
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throw invalid_code_point(cp);
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throw invalid_code_point(cp);
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}
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}
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return cp;
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return cp;
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}
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}
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template <typename octet_iterator>
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template <typename octet_iterator>
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@ -162,7 +162,7 @@ namespace utf8
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uint32_t prior(octet_iterator& it, octet_iterator start)
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uint32_t prior(octet_iterator& it, octet_iterator start)
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{
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{
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octet_iterator end = it;
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octet_iterator end = it;
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while (internal::is_trail(*(--it)))
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while (internal::is_trail(*(--it)))
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if (it < start)
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if (it < start)
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throw invalid_utf8(*it); // error - no lead byte in the sequence
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throw invalid_utf8(*it); // error - no lead byte in the sequence
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octet_iterator temp = it;
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octet_iterator temp = it;
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@ -174,7 +174,7 @@ namespace utf8
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uint32_t previous(octet_iterator& it, octet_iterator pass_start)
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uint32_t previous(octet_iterator& it, octet_iterator pass_start)
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{
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{
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octet_iterator end = it;
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octet_iterator end = it;
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while (internal::is_trail(*(--it)))
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while (internal::is_trail(*(--it)))
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if (it == pass_start)
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if (it == pass_start)
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throw invalid_utf8(*it); // error - no lead byte in the sequence
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throw invalid_utf8(*it); // error - no lead byte in the sequence
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octet_iterator temp = it;
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octet_iterator temp = it;
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@ -193,14 +193,14 @@ namespace utf8
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distance (octet_iterator first, octet_iterator last)
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distance (octet_iterator first, octet_iterator last)
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{
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{
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typename std::iterator_traits<octet_iterator>::difference_type dist;
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typename std::iterator_traits<octet_iterator>::difference_type dist;
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for (dist = 0; first < last; ++dist)
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for (dist = 0; first < last; ++dist)
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next(first, last);
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next(first, last);
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return dist;
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return dist;
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}
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}
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template <typename u16bit_iterator, typename octet_iterator>
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template <typename u16bit_iterator, typename octet_iterator>
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octet_iterator utf16to8 (u16bit_iterator start, u16bit_iterator end, octet_iterator result)
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octet_iterator utf16to8 (u16bit_iterator start, u16bit_iterator end, octet_iterator result)
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{
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{
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while (start != end) {
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while (start != end) {
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uint32_t cp = internal::mask16(*start++);
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uint32_t cp = internal::mask16(*start++);
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// Take care of surrogate pairs first
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// Take care of surrogate pairs first
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@ -208,17 +208,17 @@ namespace utf8
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if (start != end) {
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if (start != end) {
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uint32_t trail_surrogate = internal::mask16(*start++);
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uint32_t trail_surrogate = internal::mask16(*start++);
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if (trail_surrogate >= internal::TRAIL_SURROGATE_MIN && trail_surrogate <= internal::TRAIL_SURROGATE_MAX)
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if (trail_surrogate >= internal::TRAIL_SURROGATE_MIN && trail_surrogate <= internal::TRAIL_SURROGATE_MAX)
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cp = (cp << 10) + trail_surrogate + internal::SURROGATE_OFFSET;
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cp = (cp << 10) + trail_surrogate + internal::SURROGATE_OFFSET;
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else
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else
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throw invalid_utf16(static_cast<uint16_t>(trail_surrogate));
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throw invalid_utf16(static_cast<uint16_t>(trail_surrogate));
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}
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}
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else
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else
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throw invalid_utf16(static_cast<uint16_t>(*start));
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throw invalid_utf16(static_cast<uint16_t>(*start));
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}
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}
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result = append(cp, result);
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result = append(cp, result);
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}
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}
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return result;
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return result;
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}
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}
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template <typename u16bit_iterator, typename octet_iterator>
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template <typename u16bit_iterator, typename octet_iterator>
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@ -256,13 +256,13 @@ namespace utf8
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// The iterator class
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// The iterator class
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template <typename octet_iterator>
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template <typename octet_iterator>
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class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t> {
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class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t> {
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octet_iterator it;
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octet_iterator it;
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octet_iterator range_start;
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octet_iterator range_start;
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octet_iterator range_end;
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octet_iterator range_end;
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public:
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public:
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iterator () {};
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iterator () {};
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explicit iterator (const octet_iterator& octet_it,
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explicit iterator (const octet_iterator& octet_it,
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const octet_iterator& range_start,
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const octet_iterator& range_start,
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const octet_iterator& range_end) :
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const octet_iterator& range_end) :
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it(octet_it), range_start(range_start), range_end(range_end)
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it(octet_it), range_start(range_start), range_end(range_end)
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@ -277,8 +277,8 @@ namespace utf8
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octet_iterator temp = it;
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octet_iterator temp = it;
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return next(temp, range_end);
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return next(temp, range_end);
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}
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}
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bool operator == (const iterator& rhs) const
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bool operator == (const iterator& rhs) const
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{
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{
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if (range_start != rhs.range_start || range_end != rhs.range_end)
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if (range_start != rhs.range_start || range_end != rhs.range_end)
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throw std::logic_error("Comparing utf-8 iterators defined with different ranges");
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throw std::logic_error("Comparing utf-8 iterators defined with different ranges");
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return (it == rhs.it);
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return (it == rhs.it);
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@ -287,7 +287,7 @@ namespace utf8
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{
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{
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return !(operator == (rhs));
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return !(operator == (rhs));
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}
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}
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iterator& operator ++ ()
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iterator& operator ++ ()
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{
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{
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next(it, range_end);
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next(it, range_end);
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return *this;
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return *this;
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@ -297,7 +297,7 @@ namespace utf8
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iterator temp = *this;
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iterator temp = *this;
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next(it, range_end);
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next(it, range_end);
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return temp;
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return temp;
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}
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}
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iterator& operator -- ()
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iterator& operator -- ()
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{
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{
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prior(it, range_start);
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prior(it, range_start);
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@ -33,7 +33,7 @@ DEALINGS IN THE SOFTWARE.
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namespace utf8
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namespace utf8
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{
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{
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// The typedefs for 8-bit, 16-bit and 32-bit unsigned integers
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// The typedefs for 8-bit, 16-bit and 32-bit unsigned integers
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// You may need to change them to match your system.
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// You may need to change them to match your system.
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// These typedefs have the same names as ones from cstdint, or boost/cstdint
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// These typedefs have the same names as ones from cstdint, or boost/cstdint
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typedef unsigned char uint8_t;
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typedef unsigned char uint8_t;
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typedef unsigned short uint16_t;
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typedef unsigned short uint16_t;
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// Helper code - not intended to be directly called by the library users. May be changed at any time
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// Helper code - not intended to be directly called by the library users. May be changed at any time
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namespace internal
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namespace internal
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{
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{
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// Unicode constants
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// Unicode constants
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// Leading (high) surrogates: 0xd800 - 0xdbff
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// Leading (high) surrogates: 0xd800 - 0xdbff
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// Trailing (low) surrogates: 0xdc00 - 0xdfff
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// Trailing (low) surrogates: 0xdc00 - 0xdfff
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inline bool is_code_point_valid(u32 cp)
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inline bool is_code_point_valid(u32 cp)
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{
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{
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return (cp <= CODE_POINT_MAX && !is_surrogate(cp) && cp != 0xfffe && cp != 0xffff);
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return (cp <= CODE_POINT_MAX && !is_surrogate(cp) && cp != 0xfffe && cp != 0xffff);
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}
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}
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template <typename octet_iterator>
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template <typename octet_iterator>
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inline typename std::iterator_traits<octet_iterator>::difference_type
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inline typename std::iterator_traits<octet_iterator>::difference_type
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sequence_length(octet_iterator lead_it)
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sequence_length(octet_iterator lead_it)
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{
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{
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uint8_t lead = mask8(*lead_it);
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uint8_t lead = mask8(*lead_it);
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if (lead < 0x80)
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if (lead < 0x80)
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return 1;
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return 1;
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else if ((lead >> 5) == 0x6)
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else if ((lead >> 5) == 0x6)
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return 2;
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return 2;
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return 3;
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return 3;
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else if ((lead >> 3) == 0x1e)
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else if ((lead >> 3) == 0x1e)
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return 4;
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return 4;
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else
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else
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return 0;
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return 0;
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}
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}
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enum utf_error {OK, NOT_ENOUGH_ROOM, INVALID_LEAD, INCOMPLETE_SEQUENCE, OVERLONG_SEQUENCE, INVALID_CODE_POINT};
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enum utf_error {UTF8_OK, NOT_ENOUGH_ROOM, INVALID_LEAD, INCOMPLETE_SEQUENCE, OVERLONG_SEQUENCE, INVALID_CODE_POINT};
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template <typename octet_iterator>
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template <typename octet_iterator>
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utf_error validate_next(octet_iterator& it, octet_iterator end, uint32_t* code_point)
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utf_error validate_next(octet_iterator& it, octet_iterator end, uint32_t* code_point)
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if (code_point)
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if (code_point)
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*code_point = cp;
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*code_point = cp;
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++it;
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++it;
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return OK;
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return UTF8_OK;
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}
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}
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else
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else
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return NOT_ENOUGH_ROOM;
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return NOT_ENOUGH_ROOM;
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}
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}
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// Do we have enough memory?
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// Do we have enough memory?
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if (std::distance(it, end) < length)
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if (std::distance(it, end) < length)
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return NOT_ENOUGH_ROOM;
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return NOT_ENOUGH_ROOM;
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// Check trail octets and calculate the code point
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// Check trail octets and calculate the code point
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switch (length) {
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switch (length) {
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case 0:
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case 0:
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return INVALID_LEAD;
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return INVALID_LEAD;
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break;
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break;
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case 2:
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case 2:
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if (is_trail(*(++it))) {
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if (is_trail(*(++it))) {
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cp = ((cp << 6) & 0x7ff) + ((*it) & 0x3f);
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cp = ((cp << 6) & 0x7ff) + ((*it) & 0x3f);
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}
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}
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else {
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else {
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break;
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break;
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case 4:
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case 4:
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if (is_trail(*(++it))) {
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if (is_trail(*(++it))) {
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cp = ((cp << 18) & 0x1fffff) + ((mask8(*it) << 12) & 0x3ffff);
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cp = ((cp << 18) & 0x1fffff) + ((mask8(*it) << 12) & 0x3ffff);
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if (is_trail(*(++it))) {
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if (is_trail(*(++it))) {
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cp += (mask8(*it) << 6) & 0xfff;
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cp += (mask8(*it) << 6) & 0xfff;
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if (is_trail(*(++it))) {
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if (is_trail(*(++it))) {
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cp += (*it) & 0x3f;
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cp += (*it) & 0x3f;
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}
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}
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else {
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else {
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std::advance(it, -3);
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std::advance(it, -3);
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}
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}
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// Is the code point valid?
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// Is the code point valid?
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if (!is_code_point_valid(cp)) {
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if (!is_code_point_valid(cp)) {
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for (octet_difference_type i = 0; i < length - 1; ++i)
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for (octet_difference_type i = 0; i < length - 1; ++i)
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--it;
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--it;
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return INVALID_CODE_POINT;
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return INVALID_CODE_POINT;
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}
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}
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if (code_point)
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if (code_point)
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*code_point = cp;
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*code_point = cp;
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if (cp < 0x80) {
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if (cp < 0x80) {
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if (length != 1) {
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if (length != 1) {
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std::advance(it, -(length-1));
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std::advance(it, -(length-1));
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@ -208,9 +208,9 @@ namespace internal
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return OVERLONG_SEQUENCE;
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return OVERLONG_SEQUENCE;
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}
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}
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}
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}
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++it;
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++it;
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return OK;
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return UTF8_OK;
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}
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}
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template <typename octet_iterator>
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template <typename octet_iterator>
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return validate_next(it, end, 0);
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return validate_next(it, end, 0);
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}
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}
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} // namespace internal
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} // namespace internal
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/// The library API - functions intended to be called by the users
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/// The library API - functions intended to be called by the users
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// Byte order mark
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// Byte order mark
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const uint8_t bom[] = {0xef, 0xbb, 0xbf};
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const uint8_t bom[] = {0xef, 0xbb, 0xbf};
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template <typename octet_iterator>
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template <typename octet_iterator>
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octet_iterator find_invalid(octet_iterator start, octet_iterator end)
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octet_iterator find_invalid(octet_iterator start, octet_iterator end)
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@ -231,7 +231,7 @@ namespace internal
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octet_iterator result = start;
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octet_iterator result = start;
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while (result != end) {
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while (result != end) {
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internal::utf_error err_code = internal::validate_next(result, end);
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internal::utf_error err_code = internal::validate_next(result, end);
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if (err_code != internal::OK)
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if (err_code != internal::UTF8_OK)
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return result;
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return result;
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}
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}
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return result;
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return result;
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