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tregex: use bit masks in uc_len() - neatvi - [fork] simple vi-type editor with … |
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git clone git://src.adamsgaard.dk/neatvi |
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--- |
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commit 09ae245a5a3197522cab51d55914d331f8512de5 |
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parent a2fe7e9ef29a43cf747296180156b2970b309a53 |
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Author: Ali Gholami Rudi <[email protected]> |
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Date: Sun, 22 May 2016 12:37:13 +0430 |
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regex: use bit masks in uc_len() |
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Diffstat: |
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M regex.c | 24 ++++++++++++------------ |
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1 file changed, 12 insertions(+), 12 deletions(-) |
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--- |
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diff --git a/regex.c b/regex.c |
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t@@ -96,19 +96,19 @@ static void rnode_free(struct rnode *rnode) |
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static 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 & 0x08) |
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+ return 4; |
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+ if (~c & 0x04) |
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+ return 5; |
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+ if (~c & 0x02) |
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+ return 6; |
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+ return 1; |
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} |
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static int uc_dec(char *s) |
