40 lines
864 B
C
40 lines
864 B
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <libc.h>
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char*
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jehanne_utfrrune(const char *s, Rune c)
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{
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int32_t c1;
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Rune r;
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const char *s1;
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if(c < Runesync) /* not part of utf sequence */
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return jehanne_strrchr(s, c);
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s1 = 0;
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for(;;) {
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c1 = *(uint8_t*)s;
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if(c1 < Runeself) { /* one byte rune */
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if(c1 == 0)
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return (char *)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 = jehanne_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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}
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