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| author | Karl Williamson <public@khwilliamson.com> | 2013-02-14 10:54:32 -0700 |
|---|---|---|
| committer | Karl Williamson <public@khwilliamson.com> | 2013-02-25 14:57:50 -0700 |
| commit | 537124e4032962cd7c5f3bd4f0ee7995cd79e8ec (patch) | |
| tree | e37330ba1f315956dc962f0c1f3217c6327c81d9 /utf8.h | |
| parent | 2550367793db9f9f86124a38dc944f949b315d84 (diff) | |
| download | perl-537124e4032962cd7c5f3bd4f0ee7995cd79e8ec.tar.gz | |
Add, fix comments
Diffstat (limited to 'utf8.h')
| -rw-r--r-- | utf8.h | 7 |
1 files changed, 5 insertions, 2 deletions
@@ -136,7 +136,7 @@ END_EXTERN_C U+0800..U+0FFF E0 * A0..BF 80..BF U+1000..U+CFFF E1..EC 80..BF 80..BF U+D000..U+D7FF ED 80..9F 80..BF - U+D800..U+DFFF +++++++ utf16 surrogates, not legal utf8 +++++++ + U+D800..U+DFFF ED A0..BF 80..BF (surrogates) U+E000..U+FFFF EE..EF 80..BF 80..BF U+10000..U+3FFFF F0 * 90..BF 80..BF 80..BF U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF @@ -144,7 +144,7 @@ END_EXTERN_C Below are non-Unicode code points U+110000..U+13FFFF F4 90..BF 80..BF 80..BF U+110000..U+1FFFFF F5..F7 80..BF 80..BF 80..BF - U+200000: F8.. * 88..BF 80..BF 80..BF 80..BF + U+200000..: F8.. * 88..BF 80..BF 80..BF 80..BF Note the gaps before several of the byte entries above marked by '*'. These are caused by legal UTF-8 avoiding non-shortest encodings: it is technically @@ -275,6 +275,9 @@ Perl's extended UTF-8 means we can have start bytes up to FF. #define NATIVE8_TO_UNI(ch) NATIVE_TO_ASCII(ch) /* a clearer synonym */ +/* Adds a UTF8 continuation byte 'new' of information to a running total code + * point 'old' of all the continuation bytes so far. This is designed to be + * used in a loop to convert from UTF-8 to the code point represented */ #define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) \ | (((U8)new) & UTF_CONTINUATION_MASK)) |