read.c revision 1b5d61b8 
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
65static 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 */
76static int
77xf86validateConfig(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
89XF86ConfigPtr
90xf86readConfigFile(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 */
231GenericListPtr
232xf86addListItem(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 */
254int
255xf86itemNotSublist(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 */
279XF86ConfigPtr xf86allocateConfig(void)
280{
281    if (!xf86configptr) {
282        xf86configptr = calloc(1, sizeof(XF86ConfigRec));
283    }
284    return xf86configptr;
285}
286
287void
288xf86freeConfig(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}
310