1*3e12c5d1SDavid du Colombier #include <u.h>
2*3e12c5d1SDavid du Colombier #include <libc.h>
3*3e12c5d1SDavid du Colombier
4*3e12c5d1SDavid du Colombier
5*3e12c5d1SDavid du Colombier /*
6*3e12c5d1SDavid du Colombier * Return pointer to first occurrence of s2 in s1,
7*3e12c5d1SDavid du Colombier * 0 if none
8*3e12c5d1SDavid du Colombier */
9*3e12c5d1SDavid du Colombier char*
utfutf(char * s1,char * s2)10*3e12c5d1SDavid du Colombier utfutf(char *s1, char *s2)
11*3e12c5d1SDavid du Colombier {
12*3e12c5d1SDavid du Colombier char *p;
13*3e12c5d1SDavid du Colombier long f, n1, n2;
14*3e12c5d1SDavid du Colombier Rune r;
15*3e12c5d1SDavid du Colombier
16*3e12c5d1SDavid du Colombier n1 = chartorune(&r, s2);
17*3e12c5d1SDavid du Colombier f = r;
18*3e12c5d1SDavid du Colombier if(f <= Runesync) /* represents self */
19*3e12c5d1SDavid du Colombier return strstr(s1, s2);
20*3e12c5d1SDavid du Colombier
21*3e12c5d1SDavid du Colombier n2 = strlen(s2);
22*3e12c5d1SDavid du Colombier for(p=s1; p=utfrune(p, f); p+=n1)
23*3e12c5d1SDavid du Colombier if(strncmp(p, s2, n2) == 0)
24*3e12c5d1SDavid du Colombier return p;
25*3e12c5d1SDavid du Colombier return 0;
26*3e12c5d1SDavid du Colombier }
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