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>
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50 .\" @(#)strtok.3 8.2 (Berkeley) 2/3/94
51 .\" $Id: strtok.3,v 1.6 1999/07/12 20:48:13 nik Exp $
60 .Fd #include <string.h>
62 .Fn strtok "char *str" "const char *sep"
64 .Fn strtok_r "char *str" "const char *sep" "char **last"
67 This interface is obsoleted by strsep(3).
73 is used to isolate sequential tokens in a null-terminated string,
75 These tokens are separated in the string by at least one of the
82 should be specified; subsequent calls, wishing to obtain further tokens
83 from the same string, should pass a null pointer instead.
86 must be supplied each time, and may change between calls.
90 function is a reentrant version of
94 must be provided on each call.
96 may also be used to nest two parsing loops within one another, as
97 long as separate context pointers are used.
104 return a pointer to the beginning of each subsequent token in the string,
105 after replacing the token itself with a
108 When no more tokens remain, a null pointer is returned.
112 to parse two strings using separate contexts:
114 char test[80], blah[80];
115 char *sep = "\e\e/:;=-";
116 char *word, *phrase, *brkt, *brkb;
118 strcpy(test, "This;is.a:test:of=the/string\e\etokenizer-function.");
120 for (word = strtok_r(test, sep, &brkt);
122 word = strtok_r(NULL, sep, &brkt))
124 strcpy(blah, "blah:blat:blab:blag");
126 for (phrase = strtok_r(blah, sep, &brkb);
128 phrase = strtok_r(NULL, sep, &brkb))
130 printf("So far we're at %s:%s\en", word, phrase);
154 if handed a string containing only delimiter characters,
155 will not alter the next starting point, so that a call to
157 with a different (or empty) delimiter string
161 Since this implementation always alters the next starting point,
162 such a sequence of calls would always return
165 .An Wes Peters, Softweyr LLC: Aq wes@softweyr.com