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NetBSD 6.1.5 - man page for strsep (netbsd section 3)

STRSEP(3)			   BSD Library Functions Manual 			STRSEP(3)

NAME
     strsep, stresep -- separate strings

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <string.h>

     char *
     strsep(char **stringp, const char *delim);

     char *
     stresep(char **stringp, const char *delim, int escape);

DESCRIPTION
     The strsep() function locates, in the nul-terminated string referenced by *stringp, the
     first occurrence of any character in the string delim (or the terminating '\0' character)
     and replaces it with a '\0'.  The location of the next character after the delimiter charac-
     ter (or NULL, if the end of the string was reached) is stored in *stringp.  The original
     value of *stringp is returned.

     An ``empty'' field, i.e., one caused by two adjacent delimiter characters, can be detected
     by comparing the location referenced by the pointer returned by strsep() to '\0'.

     If *stringp is initially NULL, strsep() returns NULL.  The stresep() function also takes an
     escape character that allows quoting the delimiter character so that it can be part of the
     source string.

EXAMPLES
     The following uses strsep() to parse a string, containing tokens delimited by white space,
     into an argument vector:

	   char **ap, *argv[10], *inputstring;

	   for (ap = argv; ap < &argv[9] &&
	       (*ap = strsep(&inputstring, " \t")) != NULL;) {
		   if (**ap != '\0')
			   ap++;
	   }

HISTORY
     The strsep() function is intended as a replacement for the strtok() function.  While the
     strtok() function should be preferred for portability reasons (it conforms to ANSI
     X3.159-1989 (``ANSI C89'')) it is unable to handle empty fields, i.e., detect fields delim-
     ited by two adjacent delimiter characters, or to be used for more than a single string at a
     time.  The strsep() function first appeared in 4.4BSD.

BSD					 August 12, 2006				      BSD


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