/*
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* The authors of this software are Rob Pike and Ken Thompson.
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* Copyright (c) 2002 by Lucent Technologies.
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* Permission to use, copy, modify, and distribute this software for any
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* purpose without fee is hereby granted, provided that this entire notice
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* is included in all copies of any software which is or includes a copy
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* or modification of this software and in all copies of the supporting
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* documentation for such software.
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
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* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
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* OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
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*/
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#include <stdarg.h>
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#include <string.h>
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#include "utf.h"
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#include "utfdef.h"
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const
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char*
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utfrrune(const char *s, Rune c)
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{
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long 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 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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