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annotate splitargv.c @ 20:76a6bad110e2

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Add routine to split string into argv/argc
author Daniel O'Connor <darius@dons.net.au>
date Sat, 31 Jan 2015 23:30:35 +1030
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children 01e77066f72b
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76a6bad110e2 Add routine to split string into argv/argc
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1 /*
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2 * Split string to argv
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3 *
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4 * Copyright (c) 2015
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5 * Daniel O'Connor <darius@dons.net.au>. All rights reserved.
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6 *
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7 * Redistribution and use in source and binary forms, with or without
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8 * modification, are permitted provided that the following conditions
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9 * are met:
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10 * 1. Redistributions of source code must retain the above copyright
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11 * notice, this list of conditions and the following disclaimer.
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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26 * SUCH DAMAGE.
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27 */
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28
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29 #include <string.h>
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30
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31 /* Split command string on space/tab boundaries into argv/argc
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32 *
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33 * Ignore the first 'skip' parameters.
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34 * If maxargs is exceeded return 1 otherwise 0
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35 *
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36 * TODO: handle escape chars
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37 */
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38 int
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39 splitargv(char *buf, unsigned skip, char *argv[], unsigned maxargs, int *argc) {
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40 char **btmp;
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41
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42 *argc = 0;
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43 btmp = &buf;
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44 while (1) {
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45 argv[*argc] = strsep(btmp, " \t");
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46 if (argv[*argc] == '\0')
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47 break;
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48 /* Skip arg(s) if necessary */
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49 if (skip) {
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50 skip--;
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51 continue;
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52 }
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53 (*argc)++;
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54 if (*argc == maxargs)
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55 return 1;
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56 }
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57
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58 return 0;
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59 }
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60