31 lines
401 B
C
31 lines
401 B
C
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#include <u.h>
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#include <libc.h>
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char*
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utfrune(char *s, long c)
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{
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long c1;
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Rune r;
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int n;
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if(c < Runesync) /* not part of utf sequence */
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return strchr(s, c);
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for(;;) {
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c1 = *(uchar*)s;
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if(c1 < Runeself) { /* one byte rune */
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if(c1 == 0)
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return 0;
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if(c1 == c)
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return s;
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s++;
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continue;
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}
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n = chartorune(&r, s);
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if(r == c)
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return s;
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s += n;
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}
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return 0;
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}
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