src/base/utf/canfit.c


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#include "internal.h"

/* returns 1 if string of length n is long enough to be decoded */
int
utf8·fullrune(byte* s, int n)
{
    int  i;
    rune c;

    if(n <= 0)
        return 0;

    c = *(ubyte*)s;
    if(c < TByte1)
        return 1;
    if(c < TByte3)
        return n >= 2;
    if(c < TByte4)
        return n >= 3;

    return n >= UTFmax;
}