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 = xmalloc(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 = xmalloc(size + 1);
66 memcpy(text, str, size);
67 text[size] = 0;
68 }
69
warn_ignored_character(char chr)70 static void warn_ignored_character(char chr)
71 {
72 fprintf(stderr,
73 "%s:%d:warning: ignoring unsupported character '%c'\n",
74 current_file->name, yylineno, chr);
75 }
76 %}
77
78 n [A-Za-z0-9_-]
79
80 %%
81 int str = 0;
82 int ts, i;
83
84 [ \t]*#.*\n |
85 [ \t]*\n {
86 current_file->lineno++;
87 return T_EOL;
88 }
89 [ \t]*#.*
90
91
92 [ \t]+ {
93 BEGIN(COMMAND);
94 }
95
96 . {
97 unput(yytext[0]);
98 BEGIN(COMMAND);
99 }
100
101
102 <COMMAND>{
103 {n}+ {
104 const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
105 BEGIN(PARAM);
106 current_pos.file = current_file;
107 current_pos.lineno = current_file->lineno;
108 if (id && id->flags & TF_COMMAND) {
109 zconflval.id = id;
110 return id->token;
111 }
112 alloc_string(yytext, yyleng);
113 zconflval.string = text;
114 return T_WORD;
115 }
116 . warn_ignored_character(*yytext);
117 \n {
118 BEGIN(INITIAL);
119 current_file->lineno++;
120 return T_EOL;
121 }
122 }
123
124 <PARAM>{
125 "&&" return T_AND;
126 "||" return T_OR;
127 "(" return T_OPEN_PAREN;
128 ")" return T_CLOSE_PAREN;
129 "!" return T_NOT;
130 "=" return T_EQUAL;
131 "!=" return T_UNEQUAL;
132 "<=" return T_LESS_EQUAL;
133 ">=" return T_GREATER_EQUAL;
134 "<" return T_LESS;
135 ">" return T_GREATER;
136 \"|\' {
137 str = yytext[0];
138 new_string();
139 BEGIN(STRING);
140 }
141 \n BEGIN(INITIAL); current_file->lineno++; return T_EOL;
142 ({n}|[/.])+ {
143 const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
144 if (id && id->flags & TF_PARAM) {
145 zconflval.id = id;
146 return id->token;
147 }
148 alloc_string(yytext, yyleng);
149 zconflval.string = text;
150 return T_WORD;
151 }
152 #.* /* comment */
153 \\\n current_file->lineno++;
154 [[:blank:]]+
155 . warn_ignored_character(*yytext);
156 <<EOF>> {
157 BEGIN(INITIAL);
158 }
159 }
160
161 <STRING>{
162 [^'"\\\n]+/\n {
163 append_string(yytext, yyleng);
164 zconflval.string = text;
165 return T_WORD_QUOTE;
166 }
167 [^'"\\\n]+ {
168 append_string(yytext, yyleng);
169 }
170 \\.?/\n {
171 append_string(yytext + 1, yyleng - 1);
172 zconflval.string = text;
173 return T_WORD_QUOTE;
174 }
175 \\.? {
176 append_string(yytext + 1, yyleng - 1);
177 }
178 \'|\" {
179 if (str == yytext[0]) {
180 BEGIN(PARAM);
181 zconflval.string = text;
182 return T_WORD_QUOTE;
183 } else
184 append_string(yytext, 1);
185 }
186 \n {
187 printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno());
188 current_file->lineno++;
189 BEGIN(INITIAL);
190 return T_EOL;
191 }
192 <<EOF>> {
193 BEGIN(INITIAL);
194 yylval.string = text;
195 return T_WORD_QUOTE;
196 }
197 }
198
199 <HELP>{
200 [ \t]+ {
201 ts = 0;
202 for (i = 0; i < yyleng; i++) {
203 if (yytext[i] == '\t')
204 ts = (ts & ~7) + 8;
205 else
206 ts++;
207 }
208 last_ts = ts;
209 if (first_ts) {
210 if (ts < first_ts) {
211 zconf_endhelp();
212 return T_HELPTEXT;
213 }
214 ts -= first_ts;
215 while (ts > 8) {
216 append_string(" ", 8);
217 ts -= 8;
218 }
219 append_string(" ", ts);
220 }
221 }
222 [ \t]*\n/[^ \t\n] {
223 current_file->lineno++;
224 zconf_endhelp();
225 return T_HELPTEXT;
226 }
227 [ \t]*\n {
228 current_file->lineno++;
229 append_string("\n", 1);
230 }
231 [^ \t\n].* {
232 while (yyleng) {
233 if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
234 break;
235 yyleng--;
236 }
237 append_string(yytext, yyleng);
238 if (!first_ts)
239 first_ts = last_ts;
240 }
241 <<EOF>> {
242 zconf_endhelp();
243 return T_HELPTEXT;
244 }
245 }
246
247 <<EOF>> {
248 if (current_file) {
249 zconf_endfile();
250 return T_EOL;
251 }
252 fclose(yyin);
253 yyterminate();
254 }
255
256 %%
257 void zconf_starthelp(void)
258 {
259 new_string();
260 last_ts = first_ts = 0;
261 BEGIN(HELP);
262 }
263
264 static void zconf_endhelp(void)
265 {
266 zconflval.string = text;
267 BEGIN(INITIAL);
268 }
269
270
271 /*
272 * Try to open specified file with following names:
273 * ./name
274 * $(srctree)/name
275 * The latter is used when srctree is separate from objtree
276 * when compiling the kernel.
277 * Return NULL if file is not found.
278 */
279 FILE *zconf_fopen(const char *name)
280 {
281 char *env, fullname[PATH_MAX+1];
282 FILE *f;
283
284 f = fopen(name, "r");
285 if (!f && name != NULL && name[0] != '/') {
286 env = getenv(SRCTREE);
287 if (env) {
288 sprintf(fullname, "%s/%s", env, name);
289 f = fopen(fullname, "r");
290 }
291 }
292 return f;
293 }
294
295 void zconf_initscan(const char *name)
296 {
297 yyin = zconf_fopen(name);
298 if (!yyin) {
299 printf("can't find file %s\n", name);
300 exit(1);
301 }
302
303 current_buf = xmalloc(sizeof(*current_buf));
304 memset(current_buf, 0, sizeof(*current_buf));
305
306 current_file = file_lookup(name);
307 current_file->lineno = 1;
308 }
309
310 void zconf_nextfile(const char *name)
311 {
312 struct file *iter;
313 struct file *file = file_lookup(name);
314 struct buffer *buf = xmalloc(sizeof(*buf));
315 memset(buf, 0, sizeof(*buf));
316
317 current_buf->state = YY_CURRENT_BUFFER;
318 yyin = zconf_fopen(file->name);
319 if (!yyin) {
320 printf("%s:%d: can't open file \"%s\"\n",
321 zconf_curname(), zconf_lineno(), file->name);
322 exit(1);
323 }
324 yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
325 buf->parent = current_buf;
326 current_buf = buf;
327
328 for (iter = current_file->parent; iter; iter = iter->parent ) {
329 if (!strcmp(current_file->name,iter->name) ) {
330 printf("%s:%d: recursive inclusion detected. "
331 "Inclusion path:\n current file : '%s'\n",
332 zconf_curname(), zconf_lineno(),
333 zconf_curname());
334 iter = current_file->parent;
335 while (iter && \
336 strcmp(iter->name,current_file->name)) {
337 printf(" included from: '%s:%d'\n",
338 iter->name, iter->lineno-1);
339 iter = iter->parent;
340 }
341 if (iter)
342 printf(" included from: '%s:%d'\n",
343 iter->name, iter->lineno+1);
344 exit(1);
345 }
346 }
347 file->lineno = 1;
348 file->parent = current_file;
349 current_file = file;
350 }
351
352 static void zconf_endfile(void)
353 {
354 struct buffer *parent;
355
356 current_file = current_file->parent;
357
358 parent = current_buf->parent;
359 if (parent) {
360 fclose(yyin);
361 yy_delete_buffer(YY_CURRENT_BUFFER);
362 yy_switch_to_buffer(parent->state);
363 }
364 free(current_buf);
365 current_buf = parent;
366 }
367
368 int zconf_lineno(void)
369 {
370 return current_pos.lineno;
371 }
372
373 const char *zconf_curname(void)
374 {
375 return current_pos.file ? current_pos.file->name : "<none>";
376 }
377