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INDEX(3)              DragonFly Library Functions Manual              INDEX(3)


NAME

     index, rindex -- locate character in string


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <strings.h>

     char *
     index(const char *s, int c);

     char *
     rindex(const char *s, int c);


DESCRIPTION

     The index() and rindex() functions have been deprecated in favor of
     strchr(3) and strrchr(3).

     The index() function locates the first occurrence of c (converted to a
     char) in the string pointed to by s.  The terminating null character is
     considered part of the string; therefore if c is `\0', the functions
     locate the terminating `\0'.

     The rindex() function is identical to index(), except it locates the last
     occurrence of c.


RETURN VALUES

     The functions index() and rindex() return a pointer to the located
     character, or NULL if the character does not appear in the string.


SEE ALSO

     memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3),
     strspn(3), strstr(3), strtok(3)


HISTORY

     The index() and rindex() functions appeared in Version 6 AT&T UNIX.
     Their prototypes existed previously in <string.h> before they were moved
     to <strings.h> for IEEE Std 1003.1-2001 (``POSIX.1'') compliance.  The
     functions are not specified by IEEE Std 1003.1-2008 (``POSIX.1'').

DragonFly 3.5                   March 20, 2011                   DragonFly 3.5

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