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CPM OPERATING SYSTEMS/CPM 68K/1.0X SOURCES/v101/clib/rindex.c

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+/*********************************************************************
+*   RINDEX  -  returns a pointer to last occurrence of char in string.
+*
+*	BYTE *rindex(s,c)
+*	BYTE *s, c;
+*
+*	Like 'index', only returns pointer to last c in s (instead of first),
+*	  or zero if c not in s.
+**********************************************************************/
+
+#include <portab.h>
+
+BYTE *rindex(s,c)
+	BYTE *s, c;
+{	REG BYTE *t;
+
+	for( t=s; *t; t++ )		/* look for eos.		*/
+		;
+	for( ; c != *t ; t-- )		/* look for c in s.		*/
+		if( t==s )		/* if we get to start of string,*/
+			return(0);	/*   too far.			*/
+	return(t);			/* found c. note that 'rindex'	*/
+					/*   works (ie. returns eos)	*/
+					/*   if c==NULL.		*/
+}