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| author | Karl Williamson <public@khwilliamson.com> | 2013-03-02 12:33:42 -0700 |
|---|---|---|
| committer | Karl Williamson <public@khwilliamson.com> | 2013-08-29 09:56:00 -0600 |
| commit | e5119cf47e07e212f7b0aabc9adb537b12932666 (patch) | |
| tree | 14cd71a599cc01a138e55a56b27d00eb559b32ee /utfebcdic.h | |
| parent | ee372ee9ae7c97db80e5f61d4d6178afe483a803 (diff) | |
| download | perl-e5119cf47e07e212f7b0aabc9adb537b12932666.tar.gz | |
utfebcdic.h: Add comment
Diffstat (limited to 'utfebcdic.h')
| -rw-r--r-- | utfebcdic.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/utfebcdic.h b/utfebcdic.h index 0489621147..6a23433f1e 100644 --- a/utfebcdic.h +++ b/utfebcdic.h @@ -719,8 +719,14 @@ END_EXTERN_C && NATIVE_UTF8_TO_I8(c) != 0xE0) #define UTF8_IS_CONTINUATION(c) ((NATIVE_UTF8_TO_I8(c) & 0xE0) == 0xA0) #define UTF8_IS_CONTINUED(c) (NATIVE_UTF8_TO_I8(c) >= 0xA0) + #define UTF8_IS_DOWNGRADEABLE_START(c) (NATIVE_UTF8_TO_I8(c) >= 0xC5 \ && NATIVE_UTF8_TO_I8(c) <= 0xC7) +/* Saying it this way adds a runtime test, but removes 2 run-time lookups */ +/*#define UTF8_IS_DOWNGRADEABLE_START(c) ((c) == I8_TO_NATIVE_UTF8(0xC5) \ + || (c) == I8_TO_NATIVE_UTF8(0xC6) \ + || (c) == I8_TO_NATIVE_UTF8(0xC7)) +*/ #define UTF8_IS_ABOVE_LATIN1(c) (NATIVE_UTF8_TO_I8(c) >= 0xC8) /* Can't exceed 7 on EBCDIC platforms */ |