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strsep(3) [bsd man page]

STRSEP(3)						     Library Functions Manual							 STRSEP(3)

NAME
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)						   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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