1 | /********************************************************************\ |
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2 | * BitlBee -- An IRC to other IM-networks gateway * |
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3 | * * |
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4 | * Copyright 2002-2010 Wilmer van der Gaast and others * |
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5 | \********************************************************************/ |
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6 | |
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7 | /* Help file control */ |
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8 | |
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9 | /* |
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10 | This program is free software; you can redistribute it and/or modify |
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11 | it under the terms of the GNU General Public License as published by |
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12 | the Free Software Foundation; either version 2 of the License, or |
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13 | (at your option) any later version. |
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14 | |
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15 | This program is distributed in the hope that it will be useful, |
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16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 | GNU General Public License for more details. |
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19 | |
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20 | You should have received a copy of the GNU General Public License with |
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21 | the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL; |
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22 | if not, write to the Free Software Foundation, Inc., 59 Temple Place, |
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23 | Suite 330, Boston, MA 02111-1307 USA |
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24 | */ |
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25 | |
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26 | #define BITLBEE_CORE |
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27 | #include "bitlbee.h" |
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28 | #include "help.h" |
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29 | #undef read |
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30 | #undef write |
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31 | |
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32 | #define BUFSIZE 1100 |
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33 | |
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34 | help_t *help_init( help_t **help, const char *helpfile ) |
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35 | { |
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36 | int i, buflen = 0; |
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37 | help_t *h; |
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38 | char *s, *t; |
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39 | time_t mtime; |
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40 | struct stat stat[1]; |
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41 | |
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42 | *help = h = g_new0 ( help_t, 1 ); |
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43 | |
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44 | h->fd = open( helpfile, O_RDONLY |
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45 | #ifdef _WIN32 |
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46 | | O_BINARY |
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47 | #endif |
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48 | ); |
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49 | |
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50 | if( h->fd == -1 ) |
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51 | { |
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52 | g_free( h ); |
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53 | return( *help = NULL ); |
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54 | } |
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55 | |
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56 | if( fstat( h->fd, stat ) != 0 ) |
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57 | { |
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58 | g_free( h ); |
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59 | return( *help = NULL ); |
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60 | } |
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61 | mtime = stat->st_mtime; |
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62 | |
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63 | s = g_new (char, BUFSIZE + 1 ); |
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64 | s[BUFSIZE] = 0; |
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65 | |
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66 | while( ( ( i = read( h->fd, s + buflen, BUFSIZE - buflen ) ) > 0 ) || |
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67 | ( i == 0 && strstr( s, "\n%\n" ) ) ) |
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68 | { |
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69 | buflen += i; |
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70 | memset( s + buflen, 0, BUFSIZE - buflen ); |
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71 | if( !( t = strstr( s, "\n%\n" ) ) || s[0] != '?' ) |
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72 | { |
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73 | /* FIXME: Clean up */ |
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74 | help_free( help ); |
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75 | g_free( s ); |
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76 | return NULL; |
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77 | } |
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78 | i = strchr( s, '\n' ) - s; |
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79 | |
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80 | if( h->title ) |
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81 | { |
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82 | h = h->next = g_new0( help_t, 1 ); |
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83 | } |
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84 | h->title = g_new ( char, i ); |
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85 | |
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86 | strncpy( h->title, s + 1, i - 1 ); |
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87 | h->title[i-1] = 0; |
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88 | h->fd = (*help)->fd; |
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89 | h->offset.file_offset = lseek( h->fd, 0, SEEK_CUR ) - buflen + i + 1; |
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90 | h->length = t - s - i - 1; |
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91 | h->mtime = mtime; |
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92 | |
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93 | buflen -= ( t + 3 - s ); |
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94 | t = g_strdup( t + 3 ); |
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95 | g_free( s ); |
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96 | s = g_renew( char, t, BUFSIZE + 1 ); |
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97 | s[BUFSIZE] = 0; |
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98 | } |
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99 | |
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100 | g_free( s ); |
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101 | |
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102 | return( *help ); |
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103 | } |
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104 | |
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105 | void help_free( help_t **help ) |
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106 | { |
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107 | help_t *h, *oh; |
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108 | int last_fd = -1; /* Weak de-dupe */ |
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109 | |
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110 | if( help == NULL || *help == NULL ) |
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111 | return; |
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112 | |
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113 | h = *help; |
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114 | while( h ) |
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115 | { |
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116 | if( h->fd != last_fd ) |
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117 | { |
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118 | close( h->fd ); |
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119 | last_fd = h->fd; |
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120 | } |
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121 | g_free( h->title ); |
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122 | h = (oh=h)->next; |
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123 | g_free( oh ); |
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124 | } |
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125 | |
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126 | *help = NULL; |
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127 | } |
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128 | |
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129 | char *help_get( help_t **help, char *title ) |
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130 | { |
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131 | time_t mtime; |
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132 | struct stat stat[1]; |
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133 | help_t *h; |
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134 | |
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135 | for( h = *help; h; h = h->next ) |
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136 | { |
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137 | if( h->title != NULL && g_strcasecmp( h->title, title ) == 0 ) |
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138 | break; |
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139 | } |
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140 | if( h && h->length > 0 ) |
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141 | { |
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142 | char *s = g_new( char, h->length + 1 ); |
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143 | |
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144 | s[h->length] = 0; |
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145 | if( h->fd >= 0 ) |
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146 | { |
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147 | if( fstat( h->fd, stat ) != 0 ) |
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148 | { |
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149 | g_free( s ); |
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150 | return NULL; |
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151 | } |
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152 | mtime = stat->st_mtime; |
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153 | |
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154 | if( mtime > h->mtime ) |
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155 | { |
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156 | g_free( s ); |
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157 | return NULL; |
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158 | } |
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159 | |
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160 | if( lseek( h->fd, h->offset.file_offset, SEEK_SET ) == -1 || |
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161 | read( h->fd, s, h->length ) != h->length ) |
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162 | return NULL; |
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163 | } |
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164 | else |
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165 | { |
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166 | strncpy( s, h->offset.mem_offset, h->length ); |
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167 | } |
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168 | return s; |
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169 | } |
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170 | |
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171 | return NULL; |
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172 | } |
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173 | |
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174 | int help_add_mem( help_t **help, const char *title, const char *content ) |
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175 | { |
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176 | help_t *h, *l = NULL; |
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177 | |
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178 | for( h = *help; h; h = h->next ) |
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179 | { |
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180 | if( g_strcasecmp( h->title, title ) == 0 ) |
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181 | return 0; |
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182 | |
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183 | l = h; |
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184 | } |
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185 | |
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186 | if( l ) |
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187 | h = l->next = g_new0( struct help, 1 ); |
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188 | else |
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189 | *help = h = g_new0( struct help, 1 ); |
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190 | h->fd = -1; |
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191 | h->title = g_strdup( title ); |
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192 | h->length = strlen( content ); |
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193 | h->offset.mem_offset = g_strdup( content ); |
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194 | |
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195 | return 1; |
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196 | } |
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197 | |
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198 | char *help_get_whatsnew( help_t **help, int old ) |
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199 | { |
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200 | GString *ret = NULL; |
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201 | help_t *h; |
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202 | int v; |
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203 | |
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204 | for( h = *help; h; h = h->next ) |
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205 | if( h->title != NULL && strncmp( h->title, "whatsnew", 8 ) == 0 && |
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206 | sscanf( h->title + 8, "%x", &v ) == 1 && v > old ) |
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207 | { |
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208 | char *s = help_get( &h, h->title ); |
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209 | if( ret == NULL ) |
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210 | ret = g_string_new( s ); |
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211 | else |
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212 | g_string_append_printf( ret, "\n\n%s", s ); |
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213 | g_free( s ); |
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214 | } |
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215 | |
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216 | return ret ? g_string_free( ret, FALSE ) : NULL; |
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217 | } |
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