Name
strsep — extract token from string
Synopsis
#include <string.h>
char
*strsep( |
char ** |
stringp, |
|
const char * |
delim) ; |
DESCRIPTION
If *stringp
is
NULL, the strsep
() function
returns NULL and does nothing else. Otherwise, this function
finds the first token in the string *stringp
, where tokens are
delimited by symbols in the string delim
. This token is terminated
with a '\0' character (by overwriting the delimiter) and
*stringp
is updated
to point past the token. In case no delimiter was found, the
token is taken to be the entire string *stringp
, and *stringp
is made NULL.
RETURN VALUE
The strsep
() function
returns a pointer to the token, that is, it returns the
original value of *stringp
.
NOTES
The strsep
() function was
introduced as a replacement for strtok(3), since the latter
cannot handle empty fields. However, strtok(3) conforms to
C89/C99 and hence is more portable.
BUGS
This function suffers from the same problems as strtok(3). In particular,
it modifies the original string. Avoid it.
SEE ALSO
index(3), memchr(3), rindex(3), strchr(3), strpbrk(3), strspn(3), strstr(3), strtok(3)
Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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References consulted:
Linux libc source code
Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
386BSD man pages
Modified Sat Jul 24 18:00:10 1993 by Rik Faith (faith@cs.unc.edu)
Modified Mon Jan 20 12:04:18 1997 by Andries Brouwer (aeb@cwi.nl)
Modified Tue Jan 23 20:23:07 2001 by Andries Brouwer (aeb@cwi.nl)
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