32 lines
414 B
C
32 lines
414 B
C
#include <u.h>
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#include <libc.h>
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char*
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utfrrune(char *s, long c)
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{
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long c1;
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Rune r;
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char *s1;
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if(c < Runesync) /* not part of utf sequence */
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return strrchr(s, c);
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s1 = 0;
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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 s1;
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if(c1 == c)
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s1 = s;
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s++;
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continue;
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}
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c1 = chartorune(&r, s);
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if(r == c)
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s1 = s;
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s += c1;
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}
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return 0;
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}
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