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 '$' */
116 yylval.string = expand_token(yytext, yyleng);
117 if (strlen(yylval.string))
121 "=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_RECURSIVE; return T_ASSIGN; }
122 ":=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_SIMPLE; return T_ASSIGN; }
123 "+=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_APPEND; return T_ASSIGN; }
125 . warn_ignored_character(*yytext);
134 alloc_string(yytext, yyleng);
135 yylval.string = text;
138 \n { BEGIN(INITIAL); return T_EOL; }
143 "modules" return T_MODULES;
144 "defconfig_list" return T_DEFCONFIG_LIST;
145 "allnoconfig_y" return T_ALLNOCONFIG_Y;
148 "(" return T_OPEN_PAREN;
149 ")" return T_CLOSE_PAREN;
152 "!=" return T_UNEQUAL;
153 "<=" return T_LESS_EQUAL;
154 ">=" return T_GREATER_EQUAL;
156 ">" return T_GREATER;
162 \n BEGIN(INITIAL); return T_EOL;
164 const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
165 if (id && id->flags & TF_PARAM) {
169 alloc_string(yytext, yyleng);
170 yylval.string = text;
174 /* this token includes at least one '$' */
175 yylval.string = expand_token(yytext, yyleng);
176 if (strlen(yylval.string))
183 . warn_ignored_character(*yytext);
187 "$".* append_expanded_string(yytext);
189 append_string(yytext, yyleng);
192 append_string(yytext + 1, yyleng - 1);
195 if (str == yytext[0]) {
197 yylval.string = text;
200 append_string(yytext, 1);
204 "%s:%d:warning: multi-line strings not supported\n",
205 zconf_curname(), zconf_lineno());
208 yylval.string = text;
213 yylval.string = text;
221 for (i = 0; i < yyleng; i++) {
222 if (yytext[i] == '\t')
235 append_string(" ", 8);
238 append_string(" ", ts);
246 append_string("\n", 1);
250 if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
254 append_string(yytext, yyleng);
267 if (prev_token != T_EOL && prev_token != T_HELPTEXT)
268 fprintf(stderr, "%s:%d:warning: no new line at end of file\n",
269 current_file->name, yylineno);
281 /* second stage lexer */
289 /* Do not pass unneeded T_EOL to the parser. */
290 if ((prev_token == T_EOL || prev_token == T_HELPTEXT) && token == T_EOL)
298 static char *expand_token(const char *in, size_t n)
303 const char *rest, *end;
306 append_string(in, n);
308 /* get the whole line because we do not know the end of token. */
309 while ((c = input()) != EOF) {
315 append_string(&c2, 1);
319 out = expand_one_token(&rest);
321 /* push back unused characters to the input stream */
322 end = rest + strlen(rest);
331 static void append_expanded_string(const char *str)
338 res = expand_dollar(&str);
340 /* push back unused characters to the input stream */
341 end = str + strlen(str);
345 append_string(res, strlen(res));
350 void zconf_starthelp(void)
353 last_ts = first_ts = 0;
357 static void zconf_endhelp(void)
359 yylval.string = text;
365 * Try to open specified file with following names:
368 * The latter is used when srctree is separate from objtree
369 * when compiling the firmware.
370 * Return NULL if file is not found.
372 FILE *zconf_fopen(const char *name)
374 char *env, fullname[PATH_MAX+1];
377 f = fopen(name, "r");
378 if (!f && name != NULL && name[0] != '/') {
379 env = getenv(SRCTREE);
381 sprintf(fullname, "%s/%s", env, name);
382 f = fopen(fullname, "r");
388 void zconf_initscan(const char *name)
390 yyin = zconf_fopen(name);
392 fprintf(stderr, "can't find file %s\n", name);
396 current_buf = xmalloc(sizeof(*current_buf));
397 memset(current_buf, 0, sizeof(*current_buf));
399 current_file = file_lookup(name);
403 void zconf_nextfile(const char *name)
406 struct file *file = file_lookup(name);
407 struct buffer *buf = xmalloc(sizeof(*buf));
408 memset(buf, 0, sizeof(*buf));
410 current_buf->state = YY_CURRENT_BUFFER;
411 yyin = zconf_fopen(file->name);
413 fprintf(stderr, "%s:%d: can't open file \"%s\"\n",
414 zconf_curname(), zconf_lineno(), file->name);
417 yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
418 buf->parent = current_buf;
421 current_file->lineno = yylineno;
422 file->parent = current_file;
424 for (iter = current_file; iter; iter = iter->parent) {
425 if (!strcmp(iter->name, file->name)) {
427 "Recursive inclusion detected.\n"
429 " current file : %s\n", file->name);
433 fprintf(stderr, " included from: %s:%d\n",
434 iter->name, iter->lineno - 1);
435 } while (strcmp(iter->name, file->name));
444 static void zconf_endfile(void)
446 struct buffer *parent;
448 current_file = current_file->parent;
450 yylineno = current_file->lineno;
452 parent = current_buf->parent;
455 yy_delete_buffer(YY_CURRENT_BUFFER);
456 yy_switch_to_buffer(parent->state);
459 current_buf = parent;
462 int zconf_lineno(void)
464 return current_pos.lineno;
467 const char *zconf_curname(void)
469 return current_pos.file ? current_pos.file->name : "<none>";