How does Go do string comparison?

Question

http://golang.org/ref/spec#Comparison_operators

Go supports string comparison without any special functions. Does the Go runtime do work behind the scenes to make co

Answer 1

runtime/string.goc (go1.3):

func eqstring(s1 String, s2 String) (v bool) {
    if(s1.len != s2.len) {
        v = false;
        return;
    }
    if(s1.str == s2.str) {
        v = true;
        return;
    }
    v = runtime·memeq(s1.str, s2.str, s1.len);
}

int32
runtime·strcmp(byte *s1, byte *s2)
{
    uintptr i;
    byte c1, c2;

    for(i=0;; i++) {
        c1 = s1[i];
        c2 = s2[i];
        if(c1 < c2)
            return -1;
        if(c1 > c2)
            return +1;
        if(c1 == 0)
            return 0;
    }
}

Note: The runtime· separator is a Unicode middle-dot, not a period.