blob: 187d38ccadd57f489b89cbbf16798cdf5f08ef49 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001%option backup nostdinit noyywrap never-interactive full ecs
2%option 8bit backup nodefault perf-report perf-report
3%x COMMAND HELP STRING PARAM
4%{
5/*
6 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
7 * Released under the terms of the GNU GPL v2.0.
8 */
9
10#include <limits.h>
11#include <stdio.h>
12#include <stdlib.h>
13#include <string.h>
14#include <unistd.h>
15
16#define LKC_DIRECT_LINK
17#include "lkc.h"
18
19#define START_STRSIZE 16
20
Roman Zippela02f0572005-11-08 21:34:53 -080021static struct {
22 struct file *file;
23 int lineno;
24} current_pos;
25
Roman Zippel7a884882005-11-08 21:34:51 -080026static char *text;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027static int text_size, text_asize;
28
29struct buffer {
30 struct buffer *parent;
31 YY_BUFFER_STATE state;
32};
33
34struct buffer *current_buf;
35
36static int last_ts, first_ts;
37
38static void zconf_endhelp(void);
Roman Zippela02f0572005-11-08 21:34:53 -080039static void zconf_endfile(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41void new_string(void)
42{
43 text = malloc(START_STRSIZE);
44 text_asize = START_STRSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 text_size = 0;
Roman Zippel7a884882005-11-08 21:34:51 -080046 *text = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070047}
48
49void append_string(const char *str, int size)
50{
51 int new_size = text_size + size + 1;
52 if (new_size > text_asize) {
Roman Zippel7a884882005-11-08 21:34:51 -080053 new_size += START_STRSIZE - 1;
54 new_size &= -START_STRSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 text = realloc(text, new_size);
56 text_asize = new_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 }
Roman Zippel7a884882005-11-08 21:34:51 -080058 memcpy(text + text_size, str, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 text_size += size;
Roman Zippel7a884882005-11-08 21:34:51 -080060 text[text_size] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061}
62
63void 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
71ws [ \n\t]
72n [A-Za-z0-9_]
73
74%%
75 int str = 0;
76 int ts, i;
77
Roman Zippela02f0572005-11-08 21:34:53 -080078[ \t]*#.*\n |
79[ \t]*\n {
80 current_file->lineno++;
81 return T_EOL;
82}
Linus Torvalds1da177e2005-04-16 15:20:36 -070083[ \t]*#.*
84
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
86[ \t]+ {
87 BEGIN(COMMAND);
88}
89
90. {
91 unput(yytext[0]);
92 BEGIN(COMMAND);
93}
94
95
96<COMMAND>{
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 {n}+ {
Roman Zippel7a884882005-11-08 21:34:51 -080098 struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
Roman Zippela02f0572005-11-08 21:34:53 -080099 BEGIN(PARAM);
100 current_pos.file = current_file;
101 current_pos.lineno = current_file->lineno;
Roman Zippel7a884882005-11-08 21:34:51 -0800102 if (id && id->flags & TF_COMMAND) {
Roman Zippel3370f9f2005-11-08 21:34:52 -0800103 zconflval.id = id;
Roman Zippel7a884882005-11-08 21:34:51 -0800104 return id->token;
105 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 alloc_string(yytext, yyleng);
107 zconflval.string = text;
108 return T_WORD;
109 }
110 .
Roman Zippela02f0572005-11-08 21:34:53 -0800111 \n {
112 BEGIN(INITIAL);
113 current_file->lineno++;
114 return T_EOL;
115 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116}
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 \"|\' {
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}|[-/.])+ {
Roman Zippel7a884882005-11-08 21:34:51 -0800134 struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
Roman Zippel3370f9f2005-11-08 21:34:52 -0800135 if (id && id->flags & TF_PARAM) {
136 zconflval.id = id;
Roman Zippel7a884882005-11-08 21:34:51 -0800137 return id->token;
Roman Zippel3370f9f2005-11-08 21:34:52 -0800138 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 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 append_string(yytext, yyleng);
221 if (!first_ts)
222 first_ts = last_ts;
223 }
224 <<EOF>> {
225 zconf_endhelp();
226 return T_HELPTEXT;
227 }
228}
229
230<<EOF>> {
Roman Zippela02f0572005-11-08 21:34:53 -0800231 if (current_file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 zconf_endfile();
Roman Zippela02f0572005-11-08 21:34:53 -0800233 return T_EOL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 }
235 fclose(yyin);
236 yyterminate();
237}
238
239%%
240void zconf_starthelp(void)
241{
242 new_string();
243 last_ts = first_ts = 0;
244 BEGIN(HELP);
245}
246
247static void zconf_endhelp(void)
248{
249 zconflval.string = text;
250 BEGIN(INITIAL);
251}
252
253
254/*
255 * Try to open specified file with following names:
256 * ./name
257 * $(srctree)/name
258 * The latter is used when srctree is separate from objtree
259 * when compiling the kernel.
260 * Return NULL if file is not found.
261 */
262FILE *zconf_fopen(const char *name)
263{
264 char *env, fullname[PATH_MAX+1];
265 FILE *f;
266
267 f = fopen(name, "r");
Marcin Garski11de39e2007-05-05 22:49:00 +0200268 if (!f && name != NULL && name[0] != '/') {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 env = getenv(SRCTREE);
270 if (env) {
271 sprintf(fullname, "%s/%s", env, name);
272 f = fopen(fullname, "r");
273 }
274 }
275 return f;
276}
277
278void zconf_initscan(const char *name)
279{
280 yyin = zconf_fopen(name);
281 if (!yyin) {
282 printf("can't find file %s\n", name);
283 exit(1);
284 }
285
286 current_buf = malloc(sizeof(*current_buf));
287 memset(current_buf, 0, sizeof(*current_buf));
288
289 current_file = file_lookup(name);
290 current_file->lineno = 1;
291 current_file->flags = FILE_BUSY;
292}
293
294void zconf_nextfile(const char *name)
295{
296 struct file *file = file_lookup(name);
297 struct buffer *buf = malloc(sizeof(*buf));
298 memset(buf, 0, sizeof(*buf));
299
300 current_buf->state = YY_CURRENT_BUFFER;
301 yyin = zconf_fopen(name);
302 if (!yyin) {
303 printf("%s:%d: can't open file \"%s\"\n", zconf_curname(), zconf_lineno(), name);
304 exit(1);
305 }
306 yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
307 buf->parent = current_buf;
308 current_buf = buf;
309
310 if (file->flags & FILE_BUSY) {
311 printf("recursive scan (%s)?\n", name);
312 exit(1);
313 }
314 if (file->flags & FILE_SCANNED) {
315 printf("file %s already scanned?\n", name);
316 exit(1);
317 }
318 file->flags |= FILE_BUSY;
319 file->lineno = 1;
320 file->parent = current_file;
321 current_file = file;
322}
323
Roman Zippela02f0572005-11-08 21:34:53 -0800324static void zconf_endfile(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325{
326 struct buffer *parent;
327
328 current_file->flags |= FILE_SCANNED;
329 current_file->flags &= ~FILE_BUSY;
330 current_file = current_file->parent;
331
332 parent = current_buf->parent;
333 if (parent) {
334 fclose(yyin);
335 yy_delete_buffer(YY_CURRENT_BUFFER);
336 yy_switch_to_buffer(parent->state);
337 }
338 free(current_buf);
339 current_buf = parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340}
341
342int zconf_lineno(void)
343{
Roman Zippela02f0572005-11-08 21:34:53 -0800344 return current_pos.lineno;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345}
346
347char *zconf_curname(void)
348{
Roman Zippela02f0572005-11-08 21:34:53 -0800349 return current_pos.file ? current_pos.file->name : "<none>";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350}