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annotate lib/mbsspn.c @ 16846:a80d21de5373

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system-quote, execute, spawn-pipe: Escape '?' on Windows. * lib/system-quote.c (SHELL_SPECIAL_CHARS, CMD_SPECIAL_CHARS): Add the '?' character. * lib/w32spawn.h (SHELL_SPECIAL_CHARS): Likewise. * tests/test-system-quote-main.c (check_all): Check also strings like "??????????". Reported by Eli Zaretskii <eliz@gnu.org>.
author Bruno Haible <bruno@clisp.org>
date Fri, 11 May 2012 01:39:04 +0200
parents 8250f2777afc
children e542fd46ad6f
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1 /* Searching a string for a character outside a given set of characters.
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2 Copyright (C) 1999, 2002, 2006-2012 Free Software Foundation, Inc.
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3 Written by Bruno Haible <bruno@clisp.org>, 2007.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 #include <config.h>
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19
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20 /* Specification. */
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21 #include <string.h>
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22
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23 #include "mbuiter.h"
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24
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25 /* Find the first occurrence in the character string STRING of any character
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26 not in the character string REJECT. Return the number of bytes from the
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27 beginning of the string to this occurrence, or to the end of the string
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28 if none exists. */
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29 size_t
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30 mbsspn (const char *string, const char *reject)
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31 {
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32 /* Optimize two cases. */
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33 if (reject[0] == '\0')
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34 return 0;
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35 if (reject[1] == '\0')
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36 {
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37 unsigned char uc = (unsigned char) reject[0];
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38
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39 if (MB_CUR_MAX > 1)
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40 {
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41 mbui_iterator_t iter;
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42
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43 for (mbui_init (iter, string); mbui_avail (iter); mbui_advance (iter))
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44 if (!(mb_len (mbui_cur (iter)) == 1
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45 && (unsigned char) * mbui_cur_ptr (iter) == uc))
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46 break;
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47 return mbui_cur_ptr (iter) - string;
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48 }
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49 else
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50 {
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51 const char *ptr;
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52
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53 for (ptr = string; *ptr != '\0'; ptr++)
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54 if ((unsigned char) *ptr != uc)
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55 break;
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56 return ptr - string;
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57 }
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58 }
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59 /* General case. */
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60 if (MB_CUR_MAX > 1)
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61 {
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62 mbui_iterator_t iter;
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63
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64 for (mbui_init (iter, string); mbui_avail (iter); mbui_advance (iter))
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65 {
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66 if (mb_len (mbui_cur (iter)) == 1)
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67 {
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68 if (mbschr (reject, * mbui_cur_ptr (iter)) == NULL)
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69 goto found;
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70 }
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71 else
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72 {
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73 mbui_iterator_t aiter;
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74
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75 for (mbui_init (aiter, reject);; mbui_advance (aiter))
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76 {
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77 if (!mbui_avail (aiter))
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78 goto found;
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79 if (mb_equal (mbui_cur (aiter), mbui_cur (iter)))
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80 break;
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81 }
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82 }
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83 }
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84 found:
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85 return mbui_cur_ptr (iter) - string;
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86 }
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87 else
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88 return strspn (string, reject);
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89 }