1 #include "lib9.h" 2 3 char* 4 utfrrune(char *s, long c) 5 { 6 long c1; 7 Rune r; 8 char *s1; 9 10 if(c < Runesync) /* not part of utf sequence */ 11 return strrchr(s, c); 12 13 s1 = 0; 14 for(;;) { 15 c1 = *(uchar*)s; 16 if(c1 < Runeself) { /* one byte rune */ 17 if(c1 == 0) 18 return s1; 19 if(c1 == c) 20 s1 = s; 21 s++; 22 continue; 23 } 24 c1 = chartorune(&r, s); 25 if(r == c) 26 s1 = s; 27 s += c1; 28 } 29 } 30