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#include "internal.h"
int
utf8ยทrunetobyte(byte* s, rune* r)
{
int i, j;
rune c;
c = *r;
if(c <= Rune1) {
s[0] = c;
return 1;
}
for(i = 2; i < UTFmax + 1; i++){
if(i == 3){
if(c > RuneMax)
c = RuneErr;
if(SurrogateMin <= c && c <= SurrogateMax)
c = RuneErr;
}
if(c <= RuneX(i) || i == UTFmax) {
s[0] = Tbyte(i) | (c >> (i - 1)*Bitx);
for(j = 1; j < i; j++)
s[j] = Tx | ((c >> (i - j - 1)*Bitx) & Maskx);
return i;
}
}
return UTFmax;
}
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