index(3c) [opensolaris man page]

index(3C)						   Standard C Library Functions 						 index(3C)

NAME

       index, rindex - string operations

SYNOPSIS

       #include <strings.h>

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

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

DESCRIPTION

       The index() and rindex() functions operate on null-terminated strings.

       The index() function returns a pointer to the first occurrence of character c in string s.

       The rindex() function returns a pointer to the last occurrence of character c in string s.

       Both  index()  and  rindex() return a null pointer if c does not occur in the string. The null character terminating a string is considered
       to be part of the string.

USAGE

       On most modern computer systems, you can not use a null pointer to indicate a null string.  A null pointer is an error and  results  in	an
       abort  of  the  program.   If  you  wish to indicate a null string, you must use a pointer that points to an explicit null string.  On some
       machines and with some implementations of the C programming language, a null pointer, if dereferenced, would yield a null  string.   Though
       often  used,  this  practice  is not always portable. Programmers using a null pointer to represent an empty string should be aware of this
       portability issue.  Even on machines where dereferencing a null pointer does not cause an abort of the program,	it  does  not  necessarily
       yield a null string.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |ATTRIBUTE TYPE		     |ATTRIBUTE VALUE		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       bstring(3C), malloc(3C), string(3C), attributes(5), standards(5)

SunOS 5.11							    24 Jul 2002 							 index(3C)

strchr(3)						     Library Functions Manual							 strchr(3)

NAME

       index, rindex, strchr, strrchr - Search for character in string

LIBRARY

       Standard C Library (libc.so, libc.a)

SYNOPSIS

       #include <strings.h>

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

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

       #include <string.h>

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

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

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       index(), rindex():  XPG4-UNIX

       strchr(), strrchr():  XPG4, XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS

       Specifies the string to search.	Specifies a character, expressed as an int data type, to search for.

DESCRIPTION

       The  index()  function locates the first occurrence of the integer specified by the c parameter, which is converted to an unsigned char, in
       the string pointed to by the s parameter.  The terminating null byte is treated as part of the string pointed to by the s parameter.

       The rindex() function locates the last occurrence of the integer specified by the c parameter, which is converted to a char value,  in  the
       string pointed to by the s parameter.  The terminating null byte is treated as a part of the string pointed to by the s parameter.

       The strchr() and strrchr() functions provide the same functionality as the index() and rindex() functions, respectively.

       If c is a null byte ('') in any of these functions, the function locates the terminating null byte of s.

RETURN VALUES

       Upon  successful  completion, these functions return a pointer to the byte in the scanned string. When the byte specified by parameter c is
       not found, a null pointer is returned.

RELATED INFORMATION

       Functions: string(3), wcschr(3)

       Standards: standards(5) delim off

																	 strchr(3)