1 .\" Copyright (c) 1998 Softweyr LLC. All rights reserved.
3 .\" strtok_r, from Berkeley strtok
4 .\" Oct 13, 1998 by Wes Peters <wes@softweyr.com>
6 .\" Copyright (c) 1988, 1991, 1993
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50 .\" @(#)strtok.3 8.2 (Berkeley) 2/3/94
59 .Fd #include <string.h>
61 .Fn strtok "char *str" "const char *sep"
63 .Fn strtok_r "char *str" "const char *sep" "char **last"
66 This interface is obsoleted by strsep(3).
72 is used to isolate sequential tokens in a null-terminated string,
74 These tokens are separated in the string by at least one of the
81 should be specified; subsequent calls, wishing to obtain further tokens
82 from the same string, should pass a null pointer instead.
85 must be supplied each time, and may change between calls.
89 function is a reentrant version of
93 must be provided on each call.
95 may also be used to nest two parsing loops within one another, as
96 long as separate context pointers are used.
103 return a pointer to the beginning of each subsequent token in the string,
104 after replacing the token itself with a
107 When no more tokens remain, a null pointer is returned.
111 to parse two strings using separate contexts:
113 char test[80], blah[80];
114 char *sep = "\e\e/:;=-";
115 char *word, *phrase, *brkt, *brkb;
117 strcpy(test, "This;is.a:test:of=the/string\e\etokenizer-function.");
119 for (word = strtok_r(test, sep, &brkt);
121 word = strtok_r(NULL, sep, &brkt))
123 strcpy(blah, "blah:blat:blab:blag");
125 for (phrase = strtok_r(blah, sep, &brkb);
127 phrase = strtok_r(NULL, sep, &brkb))
129 printf("So far we're at %s:%s\en", word, phrase);
153 if handed a string containing only delimiter characters,
154 will not alter the next starting point, so that a call to
156 with a different (or empty) delimiter string
160 Since this implementation always alters the next starting point,
161 such a sequence of calls would always return
164 Wes Peters, Softweyr LLC:
165 .Xr <wes@softweyr.com>
167 Based on the FreeBSD 3.0 implementation.