Mercurial > dovecot > core-2.2

annotate src/lib/strescape.c @ 1216:3784730cfcd8 HEAD

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str_unescape(): return char*
author Timo Sirainen <tss@iki.fi>
date Thu, 20 Feb 2003 18:30:51 +0200
parents fd8888f6f037
children ae229b7acb4c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
896
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1 /*
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2 Copyright (c) 2003 Timo Sirainen
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3
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4 Permission is hereby granted, free of charge, to any person obtaining
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5 a copy of this software and associated documentation files (the
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6 "Software"), to deal in the Software without restriction, including
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7 without limitation the rights to use, copy, modify, merge, publish,
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8 distribute, sublicense, and/or sell copies of the Software, and to
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9 permit persons to whom the Software is furnished to do so, subject to
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10 the following conditions:
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11
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12 The above copyright notice and this permission notice shall be
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13 included in all copies or substantial portions of the Software.
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14
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15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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16 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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17 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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18 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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19 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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20 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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21 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 */
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23
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24 #include "lib.h"
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25 #include "str.h"
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26 #include "strescape.h"
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27
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28 const char *str_escape(const char *str)
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29 {
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30 char *ret, *p;
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31 size_t i, esc;
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32
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33 /* get length of string and number of chars to escape */
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34 esc = 0;
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35 for (i = 0; str[i] != '\0'; i++) {
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36 if (IS_ESCAPED_CHAR(str[i]))
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37 esc++;
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38 }
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39
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40 if (esc == 0)
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41 return str;
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42
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43 /* @UNSAFE: escape them */
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44 p = ret = t_malloc(i + esc + 1);
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45 for (; *str != '\0'; str++) {
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46 if (IS_ESCAPED_CHAR(*str))
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47 *p++ = '\\';
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48 *p++ = *str;
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49 }
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50 *p = '\0';
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51 return ret;
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52 }
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53
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54 void str_append_unescaped(string_t *dest, const void *src, size_t src_size)
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55 {
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56 const unsigned char *src_c = src;
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57 size_t start = 0, i = 0;
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58
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59 while (i < src_size) {
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60 start = i;
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61 for (; i < src_size; i++) {
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62 if (src_c[i] == '\\')
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63 break;
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64 }
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65
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66 str_append_n(dest, src_c + start, i-start);
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67
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68 if (src_c[i] == '\\')
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69 i++;
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70 start = i;
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71 }
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72 }
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73
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3784730cfcd8 str_unescape(): return char*
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74 char *str_unescape(char *str)
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75 {
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76 /* @UNSAFE */
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77 char *dest, *start = str;
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78
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79 while (*str != '\\') {
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80 if (*str == '\0')
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81 return start;
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82 str++;
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83 }
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84
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85 for (dest = str; *str != '\0'; str++) {
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86 if (*str != '\\' || str[1] == '\0')
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87 *dest++ = *str;
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88 }
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89
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90 *dest = '\0';
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91 return start;
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92 }