123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/* $NetBSD: utils.c,v 1.1 2002/10/04 18:37:21 elric Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Roland C. Dowdeswell.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: utils.c,v 1.1 2002/10/04 18:37:21 elric Exp $");
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#endif
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#include <malloc.h>
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#include <string.h>
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#include "utils.h"
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/* just strsep(3), but skips empty fields. */
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static char *
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strsep_getnext(char **stringp, const char *delim)
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{
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char *ret;
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ret = strsep(stringp, delim);
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while (ret && index(delim, *ret))
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ret = strsep(stringp, delim);
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return ret;
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}
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/*
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* this function returns a dynamically sized char ** of the words
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* in the line. the caller is responsible for both free(3)ing
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* each word and the superstructure by calling words_free().
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*/
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char **
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words(const char *line, int *num)
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{
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int i = 0;
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int nwords = 0;
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char *cur;
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char **ret;
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char *tmp;
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char *tmp1;
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*num = 0;
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tmp = (char *)line;
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if (tmp[0] == '\0')
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return NULL;
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while (tmp[0]) {
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if ((tmp[1] == ' ' || tmp[1] == '\t' || tmp[1] == '\0') &&
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(tmp[0] != ' ' && tmp[0] != '\t'))
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nwords++;
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tmp++;
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}
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ret = malloc((nwords+1) * sizeof(char *));
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tmp1 = tmp = strdup(line);
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while ((cur = strsep_getnext(&tmp, " \t")) != NULL)
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ret[i++] = strdup(cur);
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ret[i] = NULL;
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free(tmp1);
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*num = nwords;
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return ret;
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}
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void
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words_free(char **w, int num)
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{
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int i;
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for (i=0; i < num; i++)
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free(w[i]);
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}
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/*
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* this is a simple xor that has the same calling conventions as
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* memcpy(3).
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*/
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void
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memxor(void *res, const void *src, size_t len)
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{
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int i;
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char *r;
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const char *s;
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r = res;
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s = src;
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for (i=0; i < len; i++)
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r[i] ^= s[i];
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}
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