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24 lines
806 B
C
24 lines
806 B
C
/* File : strrchr.c
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Author : Richard A. O'Keefe.
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Updated: 10 April 1984
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Defines: strrchr(), rindex()
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strrchr(s, c) returns a pointer to the last place in s where c
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occurs, or NullS if c does not occur in s. This function is called
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rindex in V7 and 4.?bsd systems; while not ideal the name is clearer
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than strrchr, so rindex remains in strings.h as a macro. NB:
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strrchr looks for single characters, not for sets or strings. The
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parameter 'c' is declared 'int' so it will go in a register; if your
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C compiler is happy with register char change it to that.
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*/
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#include "strings.h"
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char *strrchr(register const char *s, register pchar c)
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{
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reg3 char *t;
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t = NullS;
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do if (*s == (char) c) t = (char*) s; while (*s++);
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return (char*) t;
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}
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