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strsep(3) [bsd man page]

STRSEP(3)						     Library Functions Manual							 STRSEP(3)

strsep - separate strings SYNOPSIS
#include <string.h> char * strsep(stringp, delim) char **stringp; char *delim; DESCRIPTION
The strsep() function locates, in the string referenced by *stringp , the first occurrence of any character in the string delim (or the terminating `' character) and replaces it with a `'. The location of the next character after the delimiter character (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 in *stringp to `'. If *stringp is initially NULL, strsep() returns NULL. 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 = strsep(&inputstring, " ")) != NULL;) if (**ap != '') ++ap; HISTORY
The strsep() function is intended as a replacement for the strtok() function. While the strtok() function should be preferred for porta- bility reasons (it conforms to ANSI C X3.159-1989 (``ANSI C'')) it is unable to handle empty fields, i.e. detect fields delimited 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. 4.4 Berkeley Distribution January 12, 1996 STRSEP(3)

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STRSEP(3)						     Linux Programmer's Manual							 STRSEP(3)

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 `' 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(), since the latter cannot handle empty fields. However, strtok() con- forms to ANSI-C and hence is more portable. BUGS
This function suffers from the same problems as strtok(). In particular, it modifies the original string. Avoid it. CONFORMING TO
index(3), memchr(3), rindex(3), strchr(3), strpbrk(3), strspn(3), strstr(3), strtok(3) GNU
1993-04-12 STRSEP(3)
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