1 %option nostdinit noyywrap never-interactive full ecs
2 %option 8bit nodefault yylineno
3 %x COMMAND HELP STRING PARAM ASSIGN_VAL
6 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
7 * Released under the terms of the GNU GPL v2.0.
19 #define YY_DECL static int yylex1(void)
21 #define START_STRSIZE 16
28 static int prev_token = T_EOL;
30 static int text_size, text_asize;
33 struct buffer *parent;
34 YY_BUFFER_STATE state;
37 struct buffer *current_buf;
39 static int last_ts, first_ts;
41 static char *expand_token(const char *in, size_t n);
42 static void append_expanded_string(const char *in);
43 static void zconf_endhelp(void);
44 static void zconf_endfile(void);
46 static void new_string(void)
48 text = xmalloc(START_STRSIZE);
49 text_asize = START_STRSIZE;
54 static void append_string(const char *str, int size)
56 int new_size = text_size + size + 1;
57 if (new_size > text_asize) {
58 new_size += START_STRSIZE - 1;
59 new_size &= -START_STRSIZE;
60 text = xrealloc(text, new_size);
61 text_asize = new_size;
63 memcpy(text + text_size, str, size);
68 static void alloc_string(const char *str, int size)
70 text = xmalloc(size + 1);
71 memcpy(text, str, size);
75 static void warn_ignored_character(char chr)
78 "%s:%d:warning: ignoring unsupported character '%c'\n",
79 current_file->name, yylineno, chr);
102 const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
103 current_pos.file = current_file;
104 current_pos.lineno = yylineno;
105 if (id && id->flags & TF_COMMAND) {
110 alloc_string(yytext, yyleng);
111 yylval.string = text;
115 /* this token includes at least one '$' */
116 yylval.string = expand_token(yytext, yyleng);
117 if (strlen(yylval.string))
121 "=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_RECURSIVE; return T_ASSIGN; }
122 ":=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_SIMPLE; return T_ASSIGN; }
123 "+=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_APPEND; return T_ASSIGN; }
125 . warn_ignored_character(*yytext);
134 alloc_string(yytext, yyleng);
135 yylval.string = text;
138 \n { BEGIN(INITIAL); return T_EOL; }
145 "(" return T_OPEN_PAREN;
146 ")" return T_CLOSE_PAREN;
149 "!=" return T_UNEQUAL;
150 "<=" return T_LESS_EQUAL;
151 ">=" return T_GREATER_EQUAL;
153 ">" return T_GREATER;
159 \n BEGIN(INITIAL); return T_EOL;
161 const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
162 if (id && id->flags & TF_PARAM) {
166 alloc_string(yytext, yyleng);
167 yylval.string = text;
171 /* this token includes at least one '$' */
172 yylval.string = expand_token(yytext, yyleng);
173 if (strlen(yylval.string))
180 . warn_ignored_character(*yytext);
184 "$".* append_expanded_string(yytext);
186 append_string(yytext, yyleng);
189 append_string(yytext + 1, yyleng - 1);
192 if (str == yytext[0]) {
194 yylval.string = text;
197 append_string(yytext, 1);
201 "%s:%d:warning: multi-line strings not supported\n",
202 zconf_curname(), zconf_lineno());
205 yylval.string = text;
210 yylval.string = text;
218 for (i = 0; i < yyleng; i++) {
219 if (yytext[i] == '\t')
232 append_string(" ", 8);
235 append_string(" ", ts);
243 append_string("\n", 1);
247 if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
251 append_string(yytext, yyleng);
264 if (prev_token != T_EOL && prev_token != T_HELPTEXT)
265 fprintf(stderr, "%s:%d:warning: no new line at end of file\n",
266 current_file->name, yylineno);
278 /* second stage lexer */
286 /* Do not pass unneeded T_EOL to the parser. */
287 if ((prev_token == T_EOL || prev_token == T_HELPTEXT) && token == T_EOL)
295 static char *expand_token(const char *in, size_t n)
300 const char *rest, *end;
303 append_string(in, n);
305 /* get the whole line because we do not know the end of token. */
306 while ((c = input()) != EOF) {
312 append_string(&c2, 1);
316 out = expand_one_token(&rest);
318 /* push back unused characters to the input stream */
319 end = rest + strlen(rest);
328 static void append_expanded_string(const char *str)
335 res = expand_dollar(&str);
337 /* push back unused characters to the input stream */
338 end = str + strlen(str);
342 append_string(res, strlen(res));
347 void zconf_starthelp(void)
350 last_ts = first_ts = 0;
354 static void zconf_endhelp(void)
356 yylval.string = text;
362 * Try to open specified file with following names:
365 * The latter is used when srctree is separate from objtree
366 * when compiling the firmware.
367 * Return NULL if file is not found.
369 FILE *zconf_fopen(const char *name)
371 char *env, fullname[PATH_MAX+1];
374 f = fopen(name, "r");
375 if (!f && name != NULL && name[0] != '/') {
376 env = getenv(SRCTREE);
378 sprintf(fullname, "%s/%s", env, name);
379 f = fopen(fullname, "r");
385 void zconf_initscan(const char *name)
387 yyin = zconf_fopen(name);
389 fprintf(stderr, "can't find file %s\n", name);
393 current_buf = xmalloc(sizeof(*current_buf));
394 memset(current_buf, 0, sizeof(*current_buf));
396 current_file = file_lookup(name);
400 void zconf_nextfile(const char *name)
403 struct file *file = file_lookup(name);
404 struct buffer *buf = xmalloc(sizeof(*buf));
405 memset(buf, 0, sizeof(*buf));
407 current_buf->state = YY_CURRENT_BUFFER;
408 yyin = zconf_fopen(file->name);
410 fprintf(stderr, "%s:%d: can't open file \"%s\"\n",
411 zconf_curname(), zconf_lineno(), file->name);
414 yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
415 buf->parent = current_buf;
418 current_file->lineno = yylineno;
419 file->parent = current_file;
421 for (iter = current_file; iter; iter = iter->parent) {
422 if (!strcmp(iter->name, file->name)) {
424 "Recursive inclusion detected.\n"
426 " current file : %s\n", file->name);
430 fprintf(stderr, " included from: %s:%d\n",
431 iter->name, iter->lineno - 1);
432 } while (strcmp(iter->name, file->name));
441 static void zconf_endfile(void)
443 struct buffer *parent;
445 current_file = current_file->parent;
447 yylineno = current_file->lineno;
449 parent = current_buf->parent;
452 yy_delete_buffer(YY_CURRENT_BUFFER);
453 yy_switch_to_buffer(parent->state);
456 current_buf = parent;
459 int zconf_lineno(void)
461 return current_pos.lineno;
464 const char *zconf_curname(void)
466 return current_pos.file ? current_pos.file->name : "<none>";