27 lines
317 B
C
27 lines
317 B
C
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#include <u.h>
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#include <libc.h>
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int
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utfnlen(char *s, long m)
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{
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int c;
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long n;
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Rune rune;
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char *es;
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es = s + m;
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for(n = 0; s < es; n++) {
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c = *(uchar*)s;
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if(c < Runeself){
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if(c == '\0')
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break;
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s++;
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continue;
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}
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if(!fullrune(s, es-s))
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break;
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s += chartorune(&rune, s);
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}
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return n;
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}
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