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Annotation of 43BSDReno/lib/libc/string/strtok.3, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1988 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted provided
        !             5: .\" that: (1) source distributions retain this entire copyright notice and
        !             6: .\" comment, and (2) distributions including binaries display the following
        !             7: .\" acknowledgement:  ``This product includes software developed by the
        !             8: .\" University of California, Berkeley and its contributors'' in the
        !             9: .\" documentation or other materials provided with the distribution and in
        !            10: .\" all advertising materials mentioning features or use of this software.
        !            11: .\" Neither the name of the University nor the names of its contributors may
        !            12: .\" be used to endorse or promote products derived from this software without
        !            13: .\" specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"    @(#)strtok.3    5.5 (Berkeley) 6/23/90
        !            19: .\"
        !            20: .TH STRTOK 3 "June 23, 1990"
        !            21: .UC 3
        !            22: .SH NAME
        !            23: strtok, strsep \- string token operations
        !            24: .SH SYNOPSIS
        !            25: .nf
        !            26: .ft B
        !            27: #include <string.h>
        !            28: 
        !            29: char *
        !            30: strtok(char *str, const char *sep);
        !            31: .ft R
        !            32: .fi
        !            33: .SH DESCRIPTION
        !            34: .ft B
        !            35: This interface is obsoleted by strsep(3).
        !            36: .ft R
        !            37: .PP
        !            38: .I Strtok
        !            39: is used to isolate sequential tokens in a null-terminated string,
        !            40: .IR str .
        !            41: These tokens are separated in the string by
        !            42: .B "one or more"
        !            43: of the characters in
        !            44: .IR sep .
        !            45: The first time that
        !            46: .I strtok
        !            47: is called,
        !            48: .I str
        !            49: should be specified; subsequent calls, wishing to obtain further tokens
        !            50: from the same string, should pass a null pointer instead.
        !            51: The separator string,
        !            52: .IR sep ,
        !            53: must be supplied each time, and may change between calls.
        !            54: .PP
        !            55: .I Strtok
        !            56: returns a pointer to the start of each subsequent token in the string,
        !            57: after replacing the token itself with a NUL character.
        !            58: When no more tokens remain, a null pointer is returned.
        !            59: .SH SEE ALSO
        !            60: index(3), memchr(3), rindex(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3),
        !            61: strsep(3), strspn(3), strstr(3)
        !            62: .SH STANDARDS
        !            63: .B Strtok
        !            64: conforms to ANSI X3.159-1989 (``ANSI C'').
        !            65: .SH BUGS
        !            66: There is no way to get tokens from multiple strings simultaneously.
        !            67: .PP
        !            68: The System V
        !            69: .B strtok
        !            70: will, if handed a string containing only delimiter characters,
        !            71: not alter the next starting point, so that a call to
        !            72: .B strtok
        !            73: with a different (or empty) delimiter string
        !            74: may return a non-NULL value.
        !            75: Since this implementation always alters the next starting point,
        !            76: such a sequence of calls would always return NULL.

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