| 82 | |
| 83 | template <typename octet_iterator> |
| 84 | uint32_t next(octet_iterator& it) |
| 85 | { |
| 86 | uint32_t cp = utf8::internal::mask8(*it); |
| 87 | typename std::iterator_traits<octet_iterator>::difference_type length = utf8::internal::sequence_length(it); |
| 88 | switch (length) { |
| 89 | case 1: |
| 90 | break; |
| 91 | case 2: |
| 92 | it++; |
| 93 | cp = ((cp << 6) & 0x7ff) + ((*it) & 0x3f); |
| 94 | break; |
| 95 | case 3: |
| 96 | ++it; |
| 97 | cp = ((cp << 12) & 0xffff) + ((utf8::internal::mask8(*it) << 6) & 0xfff); |
| 98 | ++it; |
| 99 | cp += (*it) & 0x3f; |
| 100 | break; |
| 101 | case 4: |
| 102 | ++it; |
| 103 | cp = ((cp << 18) & 0x1fffff) + ((utf8::internal::mask8(*it) << 12) & 0x3ffff); |
| 104 | ++it; |
| 105 | cp += (utf8::internal::mask8(*it) << 6) & 0xfff; |
| 106 | ++it; |
| 107 | cp += (*it) & 0x3f; |
| 108 | break; |
| 109 | } |
| 110 | ++it; |
| 111 | return cp; |
| 112 | } |
| 113 | |
| 114 | template <typename octet_iterator> |
| 115 | uint32_t peek_next(octet_iterator it) |