index, rindex - locate character in string
#include <strings.h>
char *index(const char *s, int c);
char *rindex(const char *s, int c);
The
index() function returns a pointer to the first occurrence of the
character
c in the string
s.
The
rindex() function returns a pointer to the last occurrence of the
character
c in the string
s.
The terminating null byte ('\0') is considered to be a part of the strings.
The
index() and
rindex() functions return a pointer to the matched
character or NULL if the character is not found.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| index (), rindex () |
Thread safety |
MT-Safe |
4.3BSD; marked as LEGACY in POSIX.1-2001. POSIX.1-2008 removes the
specifications of
index() and
rindex(), recommending
strchr(3) and
strrchr(3) instead.
memchr(3),
strchr(3),
string(3),
strpbrk(3),
strrchr(3),
strsep(3),
strspn(3),
strstr(3),
strtok(3)