1 %option nostdinit noyywrap never-interactive full ecs
2 %option 8bit nodefault perf-report perf-report
3 %option noinput
4 %x COMMAND HELP STRING PARAM
5 %{
6 /*
7 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
8 * Released under the terms of the GNU GPL v2.0.
9 */
10
11 #include <limits.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <unistd.h>
16
17 #include "lkc.h"
18
19 #define START_STRSIZE 16
20
21 static struct {
22 struct file *file;
23 int lineno;
24 } current_pos;
25
26 static char *text;
27 static int text_size, text_asize;
28
29 struct buffer {
30 struct buffer *parent;
31 YY_BUFFER_STATE state;
32 };
33
34 struct buffer *current_buf;
35
36 static int last_ts, first_ts;
37
38 static void zconf_endhelp(void);
39 static void zconf_endfile(void);
40
new_string(void)41 static void new_string(void)
42 {
43 text = malloc(START_STRSIZE);
44 text_asize = START_STRSIZE;
45 text_size = 0;
46 *text = 0;
47 }
48
append_string(const char * str,int size)49 static void append_string(const char *str, int size)
50 {
51 int new_size = text_size + size + 1;
52 if (new_size > text_asize) {
53 new_size += START_STRSIZE - 1;
54 new_size &= -START_STRSIZE;
55 text = realloc(text, new_size);
56 text_asize = new_size;
57 }
58 memcpy(text + text_size, str, size);
59 text_size += size;
60 text[text_size] = 0;
61 }
62
alloc_string(const char * str,int size)63 static void alloc_string(const char *str, int size)
64 {
65 text = malloc(size + 1);
66 memcpy(text, str, size);
67 text[size] = 0;
68 }
69 %}
70
71 ws [ \n\t]
72 n [A-Za-z0-9_]
73
74 %%
75 int str = 0;
76 int ts, i;
77
78 [ \t]*#.*\n |
79 [ \t]*\n {
80 current_file->lineno++;
81 return T_EOL;
82 }
83 [ \t]*#.*
84
85
86 [ \t]+ {
87 BEGIN(COMMAND);
88 }
89
90 . {
91 unput(yytext[0]);
92 BEGIN(COMMAND);
93 }
94
95
96 <COMMAND>{
97 {n}+ {
98 const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
99 BEGIN(PARAM);
100 current_pos.file = current_file;
101 current_pos.lineno = current_file->lineno;
102 if (id && id->flags & TF_COMMAND) {
103 zconflval.id = id;
104 return id->token;
105 }
106 alloc_string(yytext, yyleng);
107 zconflval.string = text;
108 return T_WORD;
109 }
110 .
111 \n {
112 BEGIN(INITIAL);
113 current_file->lineno++;
114 return T_EOL;
115 }
116 }
117
118 <PARAM>{
119 "&&" return T_AND;
120 "||" return T_OR;
121 "(" return T_OPEN_PAREN;
122 ")" return T_CLOSE_PAREN;
123 "!" return T_NOT;
124 "=" return T_EQUAL;
125 "!=" return T_UNEQUAL;
126 \"|\' {
127 str = yytext[0];
128 new_string();
129 BEGIN(STRING);
130 }
131 \n BEGIN(INITIAL); current_file->lineno++; return T_EOL;
132 --- /* ignore */
133 ({n}|[-/.])+ {
134 const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
135 if (id && id->flags & TF_PARAM) {
136 zconflval.id = id;
137 return id->token;
138 }
139 alloc_string(yytext, yyleng);
140 zconflval.string = text;
141 return T_WORD;
142 }
143 #.* /* comment */
144 \\\n current_file->lineno++;
145 .
146 <<EOF>> {
147 BEGIN(INITIAL);
148 }
149 }
150
151 <STRING>{
152 [^'"\\\n]+/\n {
153 append_string(yytext, yyleng);
154 zconflval.string = text;
155 return T_WORD_QUOTE;
156 }
157 [^'"\\\n]+ {
158 append_string(yytext, yyleng);
159 }
160 \\.?/\n {
161 append_string(yytext + 1, yyleng - 1);
162 zconflval.string = text;
163 return T_WORD_QUOTE;
164 }
165 \\.? {
166 append_string(yytext + 1, yyleng - 1);
167 }
168 \'|\" {
169 if (str == yytext[0]) {
170 BEGIN(PARAM);
171 zconflval.string = text;
172 return T_WORD_QUOTE;
173 } else
174 append_string(yytext, 1);
175 }
176 \n {
177 printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno());
178 current_file->lineno++;
179 BEGIN(INITIAL);
180 return T_EOL;
181 }
182 <<EOF>> {
183 BEGIN(INITIAL);
184 }
185 }
186
187 <HELP>{
188 [ \t]+ {
189 ts = 0;
190 for (i = 0; i < yyleng; i++) {
191 if (yytext[i] == '\t')
192 ts = (ts & ~7) + 8;
193 else
194 ts++;
195 }
196 last_ts = ts;
197 if (first_ts) {
198 if (ts < first_ts) {
199 zconf_endhelp();
200 return T_HELPTEXT;
201 }
202 ts -= first_ts;
203 while (ts > 8) {
204 append_string(" ", 8);
205 ts -= 8;
206 }
207 append_string(" ", ts);
208 }
209 }
210 [ \t]*\n/[^ \t\n] {
211 current_file->lineno++;
212 zconf_endhelp();
213 return T_HELPTEXT;
214 }
215 [ \t]*\n {
216 current_file->lineno++;
217 append_string("\n", 1);
218 }
219 [^ \t\n].* {
220 while (yyleng) {
221 if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
222 break;
223 yyleng--;
224 }
225 append_string(yytext, yyleng);
226 if (!first_ts)
227 first_ts = last_ts;
228 }
229 <<EOF>> {
230 zconf_endhelp();
231 return T_HELPTEXT;
232 }
233 }
234
235 <<EOF>> {
236 if (current_file) {
237 zconf_endfile();
238 return T_EOL;
239 }
240 fclose(yyin);
241 yyterminate();
242 }
243
244 %%
245 void zconf_starthelp(void)
246 {
247 new_string();
248 last_ts = first_ts = 0;
249 BEGIN(HELP);
250 }
251
252 static void zconf_endhelp(void)
253 {
254 zconflval.string = text;
255 BEGIN(INITIAL);
256 }
257
258
259 /*
260 * Try to open specified file with following names:
261 * ./name
262 * $(srctree)/name
263 * The latter is used when srctree is separate from objtree
264 * when compiling the kernel.
265 * Return NULL if file is not found.
266 */
267 FILE *zconf_fopen(const char *name)
268 {
269 char *env, fullname[PATH_MAX+1];
270 FILE *f;
271
272 f = fopen(name, "r");
273 if (!f && name != NULL && name[0] != '/') {
274 env = getenv(SRCTREE);
275 if (env) {
276 sprintf(fullname, "%s/%s", env, name);
277 f = fopen(fullname, "r");
278 }
279 }
280 return f;
281 }
282
283 void zconf_initscan(const char *name)
284 {
285 yyin = zconf_fopen(name);
286 if (!yyin) {
287 printf("can't find file %s\n", name);
288 exit(1);
289 }
290
291 current_buf = malloc(sizeof(*current_buf));
292 memset(current_buf, 0, sizeof(*current_buf));
293
294 current_file = file_lookup(name);
295 current_file->lineno = 1;
296 }
297
298 void zconf_nextfile(const char *name)
299 {
300 struct file *iter;
301 struct file *file = file_lookup(name);
302 struct buffer *buf = malloc(sizeof(*buf));
303 memset(buf, 0, sizeof(*buf));
304
305 current_buf->state = YY_CURRENT_BUFFER;
306 yyin = zconf_fopen(file->name);
307 if (!yyin) {
308 printf("%s:%d: can't open file \"%s\"\n",
309 zconf_curname(), zconf_lineno(), file->name);
310 exit(1);
311 }
312 yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
313 buf->parent = current_buf;
314 current_buf = buf;
315
316 for (iter = current_file->parent; iter; iter = iter->parent ) {
317 if (!strcmp(current_file->name,iter->name) ) {
318 printf("%s:%d: recursive inclusion detected. "
319 "Inclusion path:\n current file : '%s'\n",
320 zconf_curname(), zconf_lineno(),
321 zconf_curname());
322 iter = current_file->parent;
323 while (iter && \
324 strcmp(iter->name,current_file->name)) {
325 printf(" included from: '%s:%d'\n",
326 iter->name, iter->lineno-1);
327 iter = iter->parent;
328 }
329 if (iter)
330 printf(" included from: '%s:%d'\n",
331 iter->name, iter->lineno+1);
332 exit(1);
333 }
334 }
335 file->lineno = 1;
336 file->parent = current_file;
337 current_file = file;
338 }
339
340 static void zconf_endfile(void)
341 {
342 struct buffer *parent;
343
344 current_file = current_file->parent;
345
346 parent = current_buf->parent;
347 if (parent) {
348 fclose(yyin);
349 yy_delete_buffer(YY_CURRENT_BUFFER);
350 yy_switch_to_buffer(parent->state);
351 }
352 free(current_buf);
353 current_buf = parent;
354 }
355
356 int zconf_lineno(void)
357 {
358 return current_pos.lineno;
359 }
360
361 const char *zconf_curname(void)
362 {
363 return current_pos.file ? current_pos.file->name : "<none>";
364 }
365