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Annotation of mandoc/compat_strsep.c, Revision 1.4

1.1       schwarze    1: #include "config.h"
                      2:
1.3       schwarze    3: #if HAVE_STRSEP
1.1       schwarze    4:
                      5: int dummy;
                      6:
                      7: #else
                      8:
1.4     ! schwarze    9: /*     $Id$    */
        !            10: /*     $OpenBSD: strsep.c,v 1.7 2014/02/05 20:42:32 stsp Exp $ */
1.1       schwarze   11:
                     12: /*-
                     13:  * Copyright (c) 1990, 1993
                     14:  *     The Regents of the University of California.  All rights reserved.
                     15:  *
                     16:  * Redistribution and use in source and binary forms, with or without
                     17:  * modification, are permitted provided that the following conditions
                     18:  * are met:
                     19:  * 1. Redistributions of source code must retain the above copyright
                     20:  *    notice, this list of conditions and the following disclaimer.
                     21:  * 2. Redistributions in binary form must reproduce the above copyright
                     22:  *    notice, this list of conditions and the following disclaimer in the
                     23:  *    documentation and/or other materials provided with the distribution.
                     24:  * 3. Neither the name of the University nor the names of its contributors
                     25:  *    may be used to endorse or promote products derived from this software
                     26:  *    without specific prior written permission.
                     27:  *
                     28:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     29:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     30:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     31:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     32:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     33:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     34:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     35:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     36:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     37:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     38:  * SUCH DAMAGE.
                     39:  */
                     40:
                     41: /*
                     42:  * Get next token from string *stringp, where tokens are possibly-empty
                     43:  * strings separated by characters from delim.
                     44:  *
                     45:  * Writes NULs into the string at *stringp to end tokens.
                     46:  * delim need not remain constant from call to call.
                     47:  * On return, *stringp points past the last NUL written (if there might
                     48:  * be further tokens), or is NULL (if there are definitely no more tokens).
                     49:  *
                     50:  * If *stringp is NULL, strsep returns NULL.
                     51:  */
                     52: char *
                     53: strsep(char **stringp, const char *delim)
                     54: {
                     55:        char *s;
                     56:        const char *spanp;
                     57:        int c, sc;
                     58:        char *tok;
                     59:
                     60:        if ((s = *stringp) == NULL)
                     61:                return (NULL);
                     62:        for (tok = s;;) {
                     63:                c = *s++;
                     64:                spanp = delim;
                     65:                do {
                     66:                        if ((sc = *spanp++) == c) {
                     67:                                if (c == 0)
                     68:                                        s = NULL;
                     69:                                else
                     70:                                        s[-1] = 0;
                     71:                                *stringp = s;
                     72:                                return (tok);
                     73:                        }
                     74:                } while (sc != 0);
                     75:        }
                     76:        /* NOTREACHED */
                     77: }
                     78:
                     79: #endif

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