sys/libunicode/fullrune.c


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#include "internal.h"

int
utf8·fullrune(byte* s, int n)
{
    int  i;
    rune c;

    if (n <= 0) return 0;
    c = *(ubyte*) s;
    if (c < Tx) return 1;

    for (i = 3; i < UTFmax + 1; i++) {
        if (c < Tbyte(i)) return n >= i - 1;
    }

    return n >= UTFmax;
}