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strsep(3) [osx man page]

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

NAME
strsep -- separate strings LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <string.h> char * strsep(char **stringp, const 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 termi- nating '' 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., a character in the string delim occurs as the first character of *stringp) can be detected by comparing the loca- tion referenced by the returned pointer to ''. If *stringp is initially NULL, strsep() returns NULL. EXAMPLES
The following uses strsep() to parse a string, and prints each token in separate line: char *token, *string, *tofree; tofree = string = strdup("abc,def,ghi"); assert(string != NULL); while ((token = strsep(&string, ",")) != NULL) printf("%s ", token); free(tofree); 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 != '') if (++ap >= &argv[10]) break; SEE ALSO
memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strspn(3), strstr(3), strtok(3) HISTORY
The strsep() function is intended as a replacement for the strtok() function. While the strtok() function should be preferred for portabil- ity reasons (it conforms to ISO/IEC 9899:1990 (``ISO C90'')) it is unable to handle empty fields, i.e., detect fields delimited by two adja- cent delimiter characters, or to be used for more than a single string at a time. The strsep() function first appeared in 4.4BSD. BSD
December 5, 2008 BSD

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

NAME
strsep - extract token from string SYNOPSIS
#include <string.h> char *strsep(char **stringp, const char *delim); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): strsep(): Since glibc 2.19: _DEFAULT_SOURCE Glibc 2.19 and earlier: _BSD_SOURCE 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, that is delimited by one of the bytes in the string delim. This token is terminated by overwriting the delimiter with a null byte (''), 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. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+---------+ |Interface | Attribute | Value | +----------+---------------+---------+ |strsep() | Thread safety | MT-Safe | +----------+---------------+---------+ CONFORMING TO
4.4BSD. NOTES
The strsep() function was introduced as a replacement for strtok(3), since the latter cannot handle empty fields. However, strtok(3) con- forms to C89/C99 and hence is more portable. BUGS
Be cautious when using this function. If you do use it, note that: * This function modifies its first argument. * This function cannot be used on constant strings. * The identity of the delimiting character is lost. SEE ALSO
index(3), memchr(3), rindex(3), strchr(3), string(3), strpbrk(3), strspn(3), strstr(3), strtok(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2016-03-15 STRSEP(3)

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