Manual Pages — INDEX

NAME

LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUES
SEE ALSO
HISTORY

LIBRARY

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.

HISTORY

The index() and rindex() functions appeared in AT&T v6 . 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").

INDEX (3)

March 20, 2011

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