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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
70static void warn_ignored_character(char chr)
71{
72 fprintf(stderr,
73 "%s:%d:warning: ignoring unsupported character '%c'\n",
74 zconf_curname(), zconf_lineno(), chr);
75}
76%}
77
78n [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 }
195}
196
197<HELP>{
198 [ \t]+ {
199 ts = 0;
200 for (i = 0; i < yyleng; i++) {
201 if (yytext[i] == '\t')
202 ts = (ts & ~7) + 8;
203 else
204 ts++;
205 }
206 last_ts = ts;
207 if (first_ts) {
208 if (ts < first_ts) {
209 zconf_endhelp();
210 return T_HELPTEXT;
211 }
212 ts -= first_ts;
213 while (ts > 8) {
214 append_string(" ", 8);
215 ts -= 8;
216 }
217 append_string(" ", ts);
218 }
219 }
220 [ \t]*\n/[^ \t\n] {
221 current_file->lineno++;
222 zconf_endhelp();
223 return T_HELPTEXT;
224 }
225 [ \t]*\n {
226 current_file->lineno++;
227 append_string("\n", 1);
228 }
229 [^ \t\n].* {
230 while (yyleng) {
231 if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
232 break;
233 yyleng--;
234 }
235 append_string(yytext, yyleng);
236 if (!first_ts)
237 first_ts = last_ts;
238 }
239 <<EOF>> {
240 zconf_endhelp();
241 return T_HELPTEXT;
242 }
243}
244
245<<EOF>> {
246 if (current_file) {
247 zconf_endfile();
248 return T_EOL;
249 }
250 fclose(yyin);
251 yyterminate();
252}
253
254%%
255void zconf_starthelp(void)
256{
257 new_string();
258 last_ts = first_ts = 0;
259 BEGIN(HELP);
260}
261
262static void zconf_endhelp(void)
263{
264 zconflval.string = text;
265 BEGIN(INITIAL);
266}
267
268
269/*
270 * Try to open specified file with following names:
271 * ./name
272 * $(srctree)/name
273 * The latter is used when srctree is separate from objtree
274 * when compiling the kernel.
275 * Return NULL if file is not found.
276 */
277FILE *zconf_fopen(const char *name)
278{
279 char *env, fullname[PATH_MAX+1];
280 FILE *f;
281
282 f = fopen(name, "r");
283 if (!f && name != NULL && name[0] != '/') {
284 env = getenv(SRCTREE);
285 if (env) {
286 sprintf(fullname, "%s/%s", env, name);
287 f = fopen(fullname, "r");
288 }
289 }
290 return f;
291}
292
293void zconf_initscan(const char *name)
294{
295 yyin = zconf_fopen(name);
296 if (!yyin) {
297 printf("can't find file %s\n", name);
298 exit(1);
299 }
300
301 current_buf = xmalloc(sizeof(*current_buf));
302 memset(current_buf, 0, sizeof(*current_buf));
303
304 current_file = file_lookup(name);
305 current_file->lineno = 1;
306}
307
308void zconf_nextfile(const char *name)
309{
310 struct file *iter;
311 struct file *file = file_lookup(name);
312 struct buffer *buf = xmalloc(sizeof(*buf));
313 memset(buf, 0, sizeof(*buf));
314
315 current_buf->state = YY_CURRENT_BUFFER;
316 yyin = zconf_fopen(file->name);
317 if (!yyin) {
318 printf("%s:%d: can't open file \"%s\"\n",
319 zconf_curname(), zconf_lineno(), file->name);
320 exit(1);
321 }
322 yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
323 buf->parent = current_buf;
324 current_buf = buf;
325
326 for (iter = current_file->parent; iter; iter = iter->parent ) {
327 if (!strcmp(current_file->name,iter->name) ) {
328 printf("%s:%d: recursive inclusion detected. "
329 "Inclusion path:\n current file : '%s'\n",
330 zconf_curname(), zconf_lineno(),
331 zconf_curname());
332 iter = current_file->parent;
333 while (iter && \
334 strcmp(iter->name,current_file->name)) {
335 printf(" included from: '%s:%d'\n",
336 iter->name, iter->lineno-1);
337 iter = iter->parent;
338 }
339 if (iter)
340 printf(" included from: '%s:%d'\n",
341 iter->name, iter->lineno+1);
342 exit(1);
343 }
344 }
345 file->lineno = 1;
346 file->parent = current_file;
347 current_file = file;
348}
349
350static void zconf_endfile(void)
351{
352 struct buffer *parent;
353
354 current_file = current_file->parent;
355
356 parent = current_buf->parent;
357 if (parent) {
358 fclose(yyin);
359 yy_delete_buffer(YY_CURRENT_BUFFER);
360 yy_switch_to_buffer(parent->state);
361 }
362 free(current_buf);
363 current_buf = parent;
364}
365
366int zconf_lineno(void)
367{
368 return current_pos.lineno;
369}
370
371const char *zconf_curname(void)
372{
373 return current_pos.file ? current_pos.file->name : "<none>";
374}