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/* $OpenBSD: strsep.c,v 1.8 2015/08/31 02:53:57 guenther Exp $ */ |
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/*- |
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* Copyright (c) 1990, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <string.h> |
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/* |
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* Get next token from string *stringp, where tokens are possibly-empty |
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* strings separated by characters from delim. |
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* |
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* Writes NULs into the string at *stringp to end tokens. |
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* delim need not remain constant from call to call. |
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* On return, *stringp points past the last NUL written (if there might |
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* be further tokens), or is NULL (if there are definitely no more tokens). |
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* |
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* If *stringp is NULL, strsep returns NULL. |
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*/ |
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char * |
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strsep(char **stringp, const char *delim) |
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{ |
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char *s; |
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const char *spanp; |
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int c, sc; |
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char *tok; |
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if ((s = *stringp) == NULL) |
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return (NULL); |
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for (tok = s;;) { |
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c = *s++; |
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spanp = delim; |
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do { |
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if ((sc = *spanp++) == c) { |
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if (c == 0) |
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s = NULL; |
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else |
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s[-1] = 0; |
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*stringp = s; |
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return (tok); |
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} |
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} while (sc != 0); |
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} |
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/* NOTREACHED */ |
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} |
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DEF_WEAK(strsep); |