Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>

/*
 * Return pointer to first occurrence of s2 in s1,
 * 0 if none
 */
Rune*
runestrstr(Rune *s1, Rune *s2)
{
        Rune *p, *pa, *pb;
        int c0, c;

        c0 = *s2;
        if(c0 == 0)
                return s1;
        s2++;
        for(p=runestrchr(s1, c0); p; p=runestrchr(p+1, c0)) {
                pa = p;
                for(pb=s2;; pb++) {
                        c = *pb;
                        if(c == 0)
                                return p;
                        if(c != *++pa)
                                break;
                }
        }
        return 0;
}