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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
21static struct {
22 struct file *file;
23 int lineno;
24} current_pos;
25
26static char *text;
27static 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);
39static void zconf_endfile(void);
40
41static void new_string(void)
42{
43 text = xmalloc(START_STRSIZE);
44 text_asize = START_STRSIZE;
45 text_size = 0;
46 *text = 0;
47}
48
49static 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
63static 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%}
70
71n [A-Za-z0-9_]
72
73%%
74 int str = 0;
75 int ts, i;
76
77[ \t]*#.*\n |
78[ \t]*\n {
79 current_file->lineno++;
80 return T_EOL;
81}
82[ \t]*#.*
83
84
85[ \t]+ {
86 BEGIN(COMMAND);
87}
88
89. {
90 unput(yytext[0]);
91 BEGIN(COMMAND);
92}
93
94
95<COMMAND>{
96 {n}+ {
97 const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
98 BEGIN(PARAM);
99 current_pos.file = current_file;
100 current_pos.lineno = current_file->lineno;
101 if (id && id->flags & TF_COMMAND) {
102 zconflval.id = id;
103 return id->token;
104 }
105 alloc_string(yytext, yyleng);
106 zconflval.string = text;
107 return T_WORD;
108 }
109 .
110 \n {
111 BEGIN(INITIAL);
112 current_file->lineno++;
113 return T_EOL;
114 }
115}
116
117<PARAM>{
118 "&&" return T_AND;
119 "||" return T_OR;
120 "(" return T_OPEN_PAREN;
121 ")" return T_CLOSE_PAREN;
122 "!" return T_NOT;
123 "=" return T_EQUAL;
124 "!=" return T_UNEQUAL;
125 \"|\' {
126 str = yytext[0];
127 new_string();
128 BEGIN(STRING);
129 }
130 \n BEGIN(INITIAL); current_file->lineno++; return T_EOL;
131 --- /* ignore */
132 ({n}|[-/.])+ {
133 const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
134 if (id && id->flags & TF_PARAM) {
135 zconflval.id = id;
136 return id->token;
137 }
138 alloc_string(yytext, yyleng);
139 zconflval.string = text;
140 return T_WORD;
141 }
142 #.* /* comment */
143 \\\n current_file->lineno++;
144 .
145 <<EOF>> {
146 BEGIN(INITIAL);
147 }
148}
149
150<STRING>{
151 [^'"\\\n]+/\n {
152 append_string(yytext, yyleng);
153 zconflval.string = text;
154 return T_WORD_QUOTE;
155 }
156 [^'"\\\n]+ {
157 append_string(yytext, yyleng);
158 }
159 \\.?/\n {
160 append_string(yytext + 1, yyleng - 1);
161 zconflval.string = text;
162 return T_WORD_QUOTE;
163 }
164 \\.? {
165 append_string(yytext + 1, yyleng - 1);
166 }
167 \'|\" {
168 if (str == yytext[0]) {
169 BEGIN(PARAM);
170 zconflval.string = text;
171 return T_WORD_QUOTE;
172 } else
173 append_string(yytext, 1);
174 }
175 \n {
176 printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno());
177 current_file->lineno++;
178 BEGIN(INITIAL);
179 return T_EOL;
180 }
181 <<EOF>> {
182 BEGIN(INITIAL);
183 }
184}
185
186<HELP>{
187 [ \t]+ {
188 ts = 0;
189 for (i = 0; i < yyleng; i++) {
190 if (yytext[i] == '\t')
191 ts = (ts & ~7) + 8;
192 else
193 ts++;
194 }
195 last_ts = ts;
196 if (first_ts) {
197 if (ts < first_ts) {
198 zconf_endhelp();
199 return T_HELPTEXT;
200 }
201 ts -= first_ts;
202 while (ts > 8) {
203 append_string(" ", 8);
204 ts -= 8;
205 }
206 append_string(" ", ts);
207 }
208 }
209 [ \t]*\n/[^ \t\n] {
210 current_file->lineno++;
211 zconf_endhelp();
212 return T_HELPTEXT;
213 }
214 [ \t]*\n {
215 current_file->lineno++;
216 append_string("\n", 1);
217 }
218 [^ \t\n].* {
219 while (yyleng) {
220 if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
221 break;
222 yyleng--;
223 }
224 append_string(yytext, yyleng);
225 if (!first_ts)
226 first_ts = last_ts;
227 }
228 <<EOF>> {
229 zconf_endhelp();
230 return T_HELPTEXT;
231 }
232}
233
234<<EOF>> {
235 if (current_file) {
236 zconf_endfile();
237 return T_EOL;
238 }
239 fclose(yyin);
240 yyterminate();
241}
242
243%%
244void zconf_starthelp(void)
245{
246 new_string();
247 last_ts = first_ts = 0;
248 BEGIN(HELP);
249}
250
251static void zconf_endhelp(void)
252{
253 zconflval.string = text;
254 BEGIN(INITIAL);
255}
256
257
258/*
259 * Try to open specified file with following names:
260 * ./name
261 * $(srctree)/name
262 * The latter is used when srctree is separate from objtree
263 * when compiling the kernel.
264 * Return NULL if file is not found.
265 */
266FILE *zconf_fopen(const char *name)
267{
268 char *env, fullname[PATH_MAX+1];
269 FILE *f;
270
271 f = fopen(name, "r");
272 if (!f && name != NULL && name[0] != '/') {
273 env = getenv(SRCTREE);
274 if (env) {
275 sprintf(fullname, "%s/%s", env, name);
276 f = fopen(fullname, "r");
277 }
278 }
279 return f;
280}
281
282void zconf_initscan(const char *name)
283{
284 yyin = zconf_fopen(name);
285 if (!yyin) {
286 printf("can't find file %s\n", name);
287 exit(1);
288 }
289
290 current_buf = xmalloc(sizeof(*current_buf));
291 memset(current_buf, 0, sizeof(*current_buf));
292
293 current_file = file_lookup(name);
294 current_file->lineno = 1;
295}
296
297void zconf_nextfile(const char *name)
298{
299 struct file *iter;
300 struct file *file = file_lookup(name);
301 struct buffer *buf = xmalloc(sizeof(*buf));
302 memset(buf, 0, sizeof(*buf));
303
304 current_buf->state = YY_CURRENT_BUFFER;
305 yyin = zconf_fopen(file->name);
306 if (!yyin) {
307 printf("%s:%d: can't open file \"%s\"\n",
308 zconf_curname(), zconf_lineno(), file->name);
309 exit(1);
310 }
311 yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
312 buf->parent = current_buf;
313 current_buf = buf;
314
315 for (iter = current_file->parent; iter; iter = iter->parent ) {
316 if (!strcmp(current_file->name,iter->name) ) {
317 printf("%s:%d: recursive inclusion detected. "
318 "Inclusion path:\n current file : '%s'\n",
319 zconf_curname(), zconf_lineno(),
320 zconf_curname());
321 iter = current_file->parent;
322 while (iter && \
323 strcmp(iter->name,current_file->name)) {
324 printf(" included from: '%s:%d'\n",
325 iter->name, iter->lineno-1);
326 iter = iter->parent;
327 }
328 if (iter)
329 printf(" included from: '%s:%d'\n",
330 iter->name, iter->lineno+1);
331 exit(1);
332 }
333 }
334 file->lineno = 1;
335 file->parent = current_file;
336 current_file = file;
337}
338
339static void zconf_endfile(void)
340{
341 struct buffer *parent;
342
343 current_file = current_file->parent;
344
345 parent = current_buf->parent;
346 if (parent) {
347 fclose(yyin);
348 yy_delete_buffer(YY_CURRENT_BUFFER);
349 yy_switch_to_buffer(parent->state);
350 }
351 free(current_buf);
352 current_buf = parent;
353}
354
355int zconf_lineno(void)
356{
357 return current_pos.lineno;
358}
359
360const char *zconf_curname(void)
361{
362 return current_pos.file ? current_pos.file->name : "<none>";
363}