Mercurial > hg
annotate mcabber/src/nohtml.c @ 1532:eebeb4171232
Update documentation (help files)
author | Mikael Berthe <mikael@lilotux.net> |
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date | Sat, 04 Oct 2008 15:26:37 +0200 |
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1 /* |
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2 * nohtml.c -- (X)HTML helper functions |
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3 * |
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4 * Copyright (C) 2008 Mikael Berthe <mikael@lilotux.net> |
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5 * Some portions come from the jabberd project, see below. |
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6 * |
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7 * This program is free software; you can redistribute it and/or modify |
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8 * it under the terms of the GNU General Public License as published by |
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9 * the Free Software Foundation; either version 2 of the License, or (at |
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10 * your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, but |
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU General Public License |
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18 * along with this program; if not, write to the Free Software |
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19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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20 * USA |
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21 * |
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22 * |
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23 * Some parts come from libjabber/str.c: |
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24 * Copyright (c) 1999-2002 Jabber.com, Inc. All Rights Reserved. Contact |
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25 * information for Jabber.com, Inc. is available at http://www.jabber.com/. |
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26 * Portions Copyright (c) 1998-1999 Jeremie Miller. |
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27 */ |
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28 |
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29 #include <string.h> |
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30 #include <glib.h> |
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31 #include <config.h> |
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32 |
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33 |
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34 /* html_strip(htmlbuf) |
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35 * Remove html entities from htmlbuf and try to convert it to plain text. |
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36 * The caller must g_free the string after use. |
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37 * Code mostly derived from strunescape(), in libjabber. |
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38 */ |
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39 char *html_strip(const char *htmlbuf) |
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40 { |
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41 int i, j=0; |
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42 char *nohtml; |
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43 |
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44 if (!htmlbuf) return(NULL); |
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45 |
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46 nohtml = g_strdup(htmlbuf); |
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47 |
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48 if (!strchr(htmlbuf, '&') && !strchr(htmlbuf, '<')) |
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49 return(nohtml); |
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50 |
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51 for (i = 0; i < (int)strlen(htmlbuf); i++) { |
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52 if (htmlbuf[i] == '&') { |
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53 if (!strncmp(&htmlbuf[i],"&",5)) { |
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54 nohtml[j] = '&'; |
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55 i += 4; |
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56 } else if (!strncmp(&htmlbuf[i],""", 6)) { |
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57 nohtml[j] = '\"'; |
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58 i += 5; |
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59 } else if (!strncmp(&htmlbuf[i],"'", 6)) { |
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60 nohtml[j] = '\''; |
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61 i += 5; |
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62 } else if (!strncmp(&htmlbuf[i],"<", 4)) { |
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63 nohtml[j] = '<'; |
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64 i += 3; |
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65 } else if (!strncmp(&htmlbuf[i],">", 4)) { |
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66 nohtml[j] = '>'; |
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67 i += 3; |
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68 } |
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69 } else if (!strncmp(&htmlbuf[i],"<br>", 4) || |
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70 !strncmp(&htmlbuf[i],"<br/>", 5)) { |
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71 nohtml[j] = '\n'; |
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72 i += (htmlbuf[i+3] == '/' ? 4 : 3); |
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73 } else if (htmlbuf[i] == '<') { |
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74 /* Let's strip all unknown tags */ |
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75 j--; |
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76 while (htmlbuf[++i] != '>'); |
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77 } else |
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78 nohtml[j] = htmlbuf[i]; |
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79 j++; |
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80 } |
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81 nohtml[j] = '\0'; |
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82 return nohtml; |
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83 } |
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84 |
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85 /* html_escape(text) |
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86 * Add (x)html entities to the text. |
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87 * The caller must g_free the string after use. |
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88 * Code mostly derived from strescape(), in libjabber. |
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89 */ |
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90 char *html_escape(const char *text) |
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91 { |
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92 int i, j; |
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93 int oldlen, newlen; |
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94 char *html; |
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95 |
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96 if (!text) return(NULL); |
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97 |
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98 oldlen = newlen = strlen(text); |
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99 |
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100 for (i = 0; i < oldlen; i++) { |
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101 switch(text[i]) |
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102 { |
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103 case '&': |
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104 newlen += 5; |
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105 break; |
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106 case '\'': |
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107 newlen += 6; |
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108 break; |
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109 case '\"': |
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110 newlen += 6; |
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111 break; |
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112 case '<': |
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113 newlen += 4; |
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114 break; |
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115 case '>': |
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116 newlen += 4; |
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117 break; |
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118 case '\n': |
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119 newlen += 5; |
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120 } |
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121 } |
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122 |
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123 if (oldlen == newlen) |
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124 return g_strdup(text); |
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125 |
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126 html = g_new0(char, newlen+1); |
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127 |
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128 for (i = j = 0; i < oldlen; i++) { |
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129 switch(text[i]) |
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130 { |
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131 case '&': |
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132 memcpy(&html[j], "&", 5); |
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133 j += 5; |
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134 break; |
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135 case '\'': |
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136 memcpy(&html[j], "'", 6); |
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137 j += 6; |
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138 break; |
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139 case '\"': |
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140 memcpy(&html[j], """, 6); |
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141 j += 6; |
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142 break; |
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143 case '<': |
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144 memcpy(&html[j], "<", 4); |
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145 j += 4; |
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146 break; |
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147 case '>': |
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148 memcpy(&html[j], ">", 4); |
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149 j += 4; |
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150 break; |
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151 case '\n': |
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152 memcpy(&html[j], "<br/>", 5); |
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153 j += 5; |
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154 break; |
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155 default: |
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156 html[j++] = text[i]; |
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157 } |
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158 } |
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159 return html; |
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160 } |
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161 |
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162 /* vim: set expandtab cindent cinoptions=>2\:2(0: For Vim users... */ |