sys/libunicode/find.c


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#include "internal.h"

byte*
utf8·find(byte* s, rune c)
{
    long c1;
    rune r;
    int  n;

    if(c < RuneSync)
        return strchr(s, c);

    for(;;){
        c1 = *(ubyte*)s;
        if(c1 < RuneSelf) {
            if(c1 == 0) return nil;
            if(c1 == c) return s;
            s++;
            continue;
        }
        n = utf8·decode(s, &r);

        if(r == c)
            return s;

        s += n;
    }

    return nil;
}