**diff options**

author | Rich Felker <dalias@aerifal.cx> | 2012-04-24 04:23:55 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2012-04-24 04:23:55 -0400 |

commit | 1b0ce9af6d2aa7b92edaf3e9c631cb635bae22bd (patch) | |

tree | f12e7798d36bc9679d1f86c64340419d9569f909 /src/ctype/iswctype.c | |

parent | 1a63a9fc30e7a1f1239e3cedcb5041e5ec1c5351 (diff) | |

download | musl-1b0ce9af6d2aa7b92edaf3e9c631cb635bae22bd.tar.gz |

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.

Diffstat (limited to 'src/ctype/iswctype.c')

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