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Annotation of mandoc/compat_strsep.c, Revision 1.2

1.1       schwarze    1: #include "config.h"
                      2:
                      3: #ifdef HAVE_STRSEP
                      4:
                      5: int dummy;
                      6:
                      7: #else
                      8:
                      9: /*     ($)OpenBSD: strsep.c,v 1.6 2005/08/08 08:05:37 espie Exp $      */
                     10:
                     11: /*-
                     12:  * Copyright (c) 1990, 1993
                     13:  *     The Regents of the University of California.  All rights reserved.
                     14:  *
                     15:  * Redistribution and use in source and binary forms, with or without
                     16:  * modification, are permitted provided that the following conditions
                     17:  * are met:
                     18:  * 1. Redistributions of source code must retain the above copyright
                     19:  *    notice, this list of conditions and the following disclaimer.
                     20:  * 2. Redistributions in binary form must reproduce the above copyright
                     21:  *    notice, this list of conditions and the following disclaimer in the
                     22:  *    documentation and/or other materials provided with the distribution.
                     23:  * 3. Neither the name of the University nor the names of its contributors
                     24:  *    may be used to endorse or promote products derived from this software
                     25:  *    without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     28:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     29:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     30:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     31:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     32:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     33:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     34:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     35:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     36:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     37:  * SUCH DAMAGE.
                     38:  */
                     39:
                     40: /*
                     41:  * Get next token from string *stringp, where tokens are possibly-empty
                     42:  * strings separated by characters from delim.
                     43:  *
                     44:  * Writes NULs into the string at *stringp to end tokens.
                     45:  * delim need not remain constant from call to call.
                     46:  * On return, *stringp points past the last NUL written (if there might
                     47:  * be further tokens), or is NULL (if there are definitely no more tokens).
                     48:  *
                     49:  * If *stringp is NULL, strsep returns NULL.
                     50:  */
                     51: char *
                     52: strsep(char **stringp, const char *delim)
                     53: {
                     54:        char *s;
                     55:        const char *spanp;
                     56:        int c, sc;
                     57:        char *tok;
                     58:
                     59:        if ((s = *stringp) == NULL)
                     60:                return (NULL);
                     61:        for (tok = s;;) {
                     62:                c = *s++;
                     63:                spanp = delim;
                     64:                do {
                     65:                        if ((sc = *spanp++) == c) {
                     66:                                if (c == 0)
                     67:                                        s = NULL;
                     68:                                else
                     69:                                        s[-1] = 0;
                     70:                                *stringp = s;
                     71:                                return (tok);
                     72:                        }
                     73:                } while (sc != 0);
                     74:        }
                     75:        /* NOTREACHED */
                     76: }
                     77:
                     78: #endif

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