path: root/src/ctype/isdigit.c
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authorRich Felker <>2012-04-24 04:23:55 -0400
committerRich Felker <>2012-04-24 04:23:55 -0400
commit1b0ce9af6d2aa7b92edaf3e9c631cb635bae22bd (patch)
treef12e7798d36bc9679d1f86c64340419d9569f909 /src/ctype/isdigit.c
parent1a63a9fc30e7a1f1239e3cedcb5041e5ec1c5351 (diff)
new wcwidth implementation (fast table-based)
i tried to go with improving the old binary-search-based algorithm, but between growth in the number of ranges, bad performance, and lack of confidence in the binary search code's stability under changes in the table, i decided it was worth the extra 1.8k to have something clean and maintainable. also note that, like the alpha and punct tables, there's definitely room to optimize the nonspacing/wide tables by overlapping subtables. this is not a high priority, but i've begun looking into how to do it, and i suspect the table sizes can be roughly halved. if that turns out to be true, the new, fast, table-based implementation will be roughly the same size as if i had just extended the old binary search one.
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