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tuc: replace comparison with bit checks in uc_len() - neatvi - [fork] simple vi… |
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git clone git://src.adamsgaard.dk/neatvi |
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--- |
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commit 6ec8f20a4a15db6ec888b4815d9b7eb426515dfa |
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parent 978c4c03d19f920e0d42ca972d27f94d1dfc5327 |
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Author: Ali Gholami Rudi <[email protected]> |
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Date: Mon, 15 Jun 2015 18:51:47 +0430 |
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uc: replace comparison with bit checks in uc_len() |
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Diffstat: |
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M uc.c | 26 +++++++++++++------------- |
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1 file changed, 13 insertions(+), 13 deletions(-) |
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--- |
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diff --git a/uc.c b/uc.c |
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t@@ -10,19 +10,19 @@ |
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int uc_len(char *s) |
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{ |
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int c = (unsigned char) s[0]; |
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- if (c > 0 && c <= 0x7f) |
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- return 1; |
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- if (c >= 0xfc) |
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- return 6; |
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- if (c >= 0xf8) |
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- return 5; |
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- if (c >= 0xf0) |
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- return 4; |
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- if (c >= 0xe0) |
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- return 3; |
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- if (c >= 0xc0) |
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+ if (~c & 0x80) |
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+ return c > 0; |
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+ if (~c & 0x20) |
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return 2; |
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- return c != 0; |
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+ if (~c & 0x10) |
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+ return 3; |
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+ if (~c & 0x80) |
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+ return 4; |
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+ if (~c & 0x40) |
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+ return 5; |
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+ if (~c & 0x20) |
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+ return 6; |
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+ return 1; |
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} |
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/* the number of utf-8 characters in s */ |
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t@@ -121,7 +121,7 @@ char *uc_chr(char *s, int off) |
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return s && (off < 0 || i == off) ? s : ""; |
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} |
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-/* the number of characters between s and s + off*/ |
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+/* the number of characters between s and s + off */ |
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int uc_off(char *s, int off) |
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{ |
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char *e = s + off; |
