read.c (10942B)
1 /* 2 * 3 * Copyright (c) 1997 Metro Link Incorporated 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 19 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 20 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 * SOFTWARE. 22 * 23 * Except as contained in this notice, the name of the Metro Link shall not be 24 * used in advertising or otherwise to promote the sale, use or other dealings 25 * in this Software without prior written authorization from Metro Link. 26 * 27 */ 28 /* 29 * Copyright (c) 1997-2003 by The XFree86 Project, Inc. 30 * 31 * Permission is hereby granted, free of charge, to any person obtaining a 32 * copy of this software and associated documentation files (the "Software"), 33 * to deal in the Software without restriction, including without limitation 34 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 35 * and/or sell copies of the Software, and to permit persons to whom the 36 * Software is furnished to do so, subject to the following conditions: 37 * 38 * The above copyright notice and this permission notice shall be included in 39 * all copies or substantial portions of the Software. 40 * 41 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 42 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 43 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 44 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 45 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 46 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 47 * OTHER DEALINGS IN THE SOFTWARE. 48 * 49 * Except as contained in this notice, the name of the copyright holder(s) 50 * and author(s) shall not be used in advertising or otherwise to promote 51 * the sale, use or other dealings in this Software without prior written 52 * authorization from the copyright holder(s) and author(s). 53 */ 54 55 #ifdef HAVE_XORG_CONFIG_H 56 #include <xorg-config.h> 57 #endif 58 59 #include "xf86Config.h" 60 #include "xf86Parser.h" 61 #include "xf86tokens.h" 62 #include "Configint.h" 63 64 65 static const xf86ConfigSymTabRec TopLevelTab[] = { 66 {SECTION, "section"}, 67 {-1, ""}, 68 }; 69 70 #define CLEANUP xf86freeConfig 71 72 /* 73 * This function resolves name references and reports errors if the named 74 * objects cannot be found. 75 */ 76 static int 77 xf86validateConfig(XF86ConfigPtr p) 78 { 79 if (!xf86validateScreen(p)) 80 return FALSE; 81 if (!xf86validateInput(p)) 82 return FALSE; 83 if (!xf86validateLayout(p)) 84 return FALSE; 85 86 return TRUE; 87 } 88 89 XF86ConfigPtr 90 xf86readConfigFile(void) 91 { 92 int token; 93 XF86ConfigPtr ptr = NULL; 94 95 if ((ptr = xf86allocateConfig()) == NULL) { 96 return NULL; 97 } 98 99 while ((token = xf86getToken(TopLevelTab)) != EOF_TOKEN) { 100 switch (token) { 101 case COMMENT: 102 ptr->conf_comment = xf86addComment(ptr->conf_comment, xf86_lex_val.str); 103 break; 104 case SECTION: 105 if (xf86getSubToken(&(ptr->conf_comment)) != STRING) { 106 xf86parseError(QUOTE_MSG, "Section"); 107 CLEANUP(ptr); 108 return NULL; 109 } 110 xf86setSection(xf86_lex_val.str); 111 if (xf86nameCompare(xf86_lex_val.str, "files") == 0) { 112 free(xf86_lex_val.str); 113 xf86_lex_val.str = NULL; 114 HANDLE_RETURN(conf_files, xf86parseFilesSection()); 115 } 116 else if (xf86nameCompare(xf86_lex_val.str, "serverflags") == 0) { 117 free(xf86_lex_val.str); 118 xf86_lex_val.str = NULL; 119 HANDLE_RETURN(conf_flags, xf86parseFlagsSection()); 120 } 121 else if (xf86nameCompare(xf86_lex_val.str, "pointer") == 0) { 122 free(xf86_lex_val.str); 123 xf86_lex_val.str = NULL; 124 HANDLE_LIST(conf_input_lst, xf86parsePointerSection, 125 XF86ConfInputPtr); 126 } 127 else if (xf86nameCompare(xf86_lex_val.str, "videoadaptor") == 0) { 128 free(xf86_lex_val.str); 129 xf86_lex_val.str = NULL; 130 HANDLE_LIST(conf_videoadaptor_lst, xf86parseVideoAdaptorSection, 131 XF86ConfVideoAdaptorPtr); 132 } 133 else if (xf86nameCompare(xf86_lex_val.str, "device") == 0) { 134 free(xf86_lex_val.str); 135 xf86_lex_val.str = NULL; 136 HANDLE_LIST(conf_device_lst, xf86parseDeviceSection, 137 XF86ConfDevicePtr); 138 } 139 else if (xf86nameCompare(xf86_lex_val.str, "monitor") == 0) { 140 free(xf86_lex_val.str); 141 xf86_lex_val.str = NULL; 142 HANDLE_LIST(conf_monitor_lst, xf86parseMonitorSection, 143 XF86ConfMonitorPtr); 144 } 145 else if (xf86nameCompare(xf86_lex_val.str, "modes") == 0) { 146 free(xf86_lex_val.str); 147 xf86_lex_val.str = NULL; 148 HANDLE_LIST(conf_modes_lst, xf86parseModesSection, 149 XF86ConfModesPtr); 150 } 151 else if (xf86nameCompare(xf86_lex_val.str, "screen") == 0) { 152 free(xf86_lex_val.str); 153 xf86_lex_val.str = NULL; 154 HANDLE_LIST(conf_screen_lst, xf86parseScreenSection, 155 XF86ConfScreenPtr); 156 } 157 else if (xf86nameCompare(xf86_lex_val.str, "inputdevice") == 0) { 158 free(xf86_lex_val.str); 159 xf86_lex_val.str = NULL; 160 HANDLE_LIST(conf_input_lst, xf86parseInputSection, 161 XF86ConfInputPtr); 162 } 163 else if (xf86nameCompare(xf86_lex_val.str, "inputclass") == 0) { 164 free(xf86_lex_val.str); 165 xf86_lex_val.str = NULL; 166 HANDLE_LIST(conf_inputclass_lst, 167 xf86parseInputClassSection, XF86ConfInputClassPtr); 168 } 169 else if (xf86nameCompare(xf86_lex_val.str, "outputclass") == 0) { 170 free(xf86_lex_val.str); 171 xf86_lex_val.str = NULL; 172 HANDLE_LIST(conf_outputclass_lst, xf86parseOutputClassSection, 173 XF86ConfOutputClassPtr); 174 } 175 else if (xf86nameCompare(xf86_lex_val.str, "module") == 0) { 176 free(xf86_lex_val.str); 177 xf86_lex_val.str = NULL; 178 HANDLE_RETURN(conf_modules, xf86parseModuleSection()); 179 } 180 else if (xf86nameCompare(xf86_lex_val.str, "serverlayout") == 0) { 181 free(xf86_lex_val.str); 182 xf86_lex_val.str = NULL; 183 HANDLE_LIST(conf_layout_lst, xf86parseLayoutSection, 184 XF86ConfLayoutPtr); 185 } 186 else if (xf86nameCompare(xf86_lex_val.str, "vendor") == 0) { 187 free(xf86_lex_val.str); 188 xf86_lex_val.str = NULL; 189 HANDLE_LIST(conf_vendor_lst, xf86parseVendorSection, 190 XF86ConfVendorPtr); 191 } 192 else if (xf86nameCompare(xf86_lex_val.str, "dri") == 0) { 193 free(xf86_lex_val.str); 194 xf86_lex_val.str = NULL; 195 HANDLE_RETURN(conf_dri, xf86parseDRISection()); 196 } 197 else if (xf86nameCompare(xf86_lex_val.str, "extensions") == 0) { 198 free(xf86_lex_val.str); 199 xf86_lex_val.str = NULL; 200 HANDLE_RETURN(conf_extensions, xf86parseExtensionsSection()); 201 } 202 else { 203 free(xf86_lex_val.str); 204 xf86_lex_val.str = NULL; 205 Error(INVALID_SECTION_MSG, xf86tokenString()); 206 } 207 break; 208 default: 209 free(xf86_lex_val.str); 210 xf86_lex_val.str = NULL; 211 Error(INVALID_KEYWORD_MSG, xf86tokenString()); 212 } 213 } 214 215 if (xf86validateConfig(ptr)) 216 return ptr; 217 else { 218 CLEANUP(ptr); 219 return NULL; 220 } 221 } 222 223 #undef CLEANUP 224 225 /* 226 * adds an item to the end of the linked list. Any record whose first field 227 * is a GenericListRec can be cast to this type and used with this function. 228 * A pointer to the head of the list is returned to handle the addition of 229 * the first item. 230 */ 231 GenericListPtr 232 xf86addListItem(GenericListPtr head, GenericListPtr new) 233 { 234 GenericListPtr p = head; 235 GenericListPtr last = NULL; 236 237 while (p) { 238 last = p; 239 p = p->next; 240 } 241 242 if (last) { 243 last->next = new; 244 return head; 245 } 246 else 247 return new; 248 } 249 250 /* 251 * Test if one chained list contains the other. 252 * In this case both list have the same endpoint (provided they don't loop) 253 */ 254 int 255 xf86itemNotSublist(GenericListPtr list_1, GenericListPtr list_2) 256 { 257 GenericListPtr p = list_1; 258 GenericListPtr last_1 = NULL, last_2 = NULL; 259 260 while (p) { 261 last_1 = p; 262 p = p->next; 263 } 264 265 p = list_2; 266 while (p) { 267 last_2 = p; 268 p = p->next; 269 } 270 271 return (!(last_1 == last_2)); 272 } 273 274 /* 275 * Conditionally allocate config struct, but only allocate it 276 * if it's not already there. In either event, return the pointer 277 * to the global config struct. 278 */ 279 XF86ConfigPtr xf86allocateConfig(void) 280 { 281 if (!xf86configptr) { 282 xf86configptr = calloc(1, sizeof(XF86ConfigRec)); 283 } 284 return xf86configptr; 285 } 286 287 void 288 xf86freeConfig(XF86ConfigPtr p) 289 { 290 if (p == NULL) 291 return; 292 293 xf86freeFiles(p->conf_files); 294 xf86freeModules(p->conf_modules); 295 xf86freeFlags(p->conf_flags); 296 xf86freeMonitorList(p->conf_monitor_lst); 297 xf86freeModesList(p->conf_modes_lst); 298 xf86freeVideoAdaptorList(p->conf_videoadaptor_lst); 299 xf86freeDeviceList(p->conf_device_lst); 300 xf86freeScreenList(p->conf_screen_lst); 301 xf86freeLayoutList(p->conf_layout_lst); 302 xf86freeInputList(p->conf_input_lst); 303 xf86freeVendorList(p->conf_vendor_lst); 304 xf86freeDRI(p->conf_dri); 305 xf86freeExtensions(p->conf_extensions); 306 TestFree(p->conf_comment); 307 308 free(p); 309 }