source: branches/stable/mindi-busybox/scripts/config/zconf.l @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 7.0 KB
Line 
1%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
21char *text;
22static char *text_ptr;
23static int text_size, text_asize;
24
25struct buffer {
26        struct buffer *parent;
27        YY_BUFFER_STATE state;
28};
29
30struct buffer *current_buf;
31
32static int last_ts, first_ts;
33
34static void zconf_endhelp(void);
35static struct buffer *zconf_endfile(void);
36
37void new_string(void)
38{
39    text = malloc(START_STRSIZE);
40    text_asize = START_STRSIZE;
41    text_ptr = text;
42    text_size = 0;
43    *text_ptr = 0;
44}
45
46void append_string(const char *str, int size)
47{
48    int new_size = text_size + size + 1;
49    if (new_size > text_asize) {
50        text = realloc(text, new_size);
51        text_asize = new_size;
52        text_ptr = text + text_size;
53    }
54    memcpy(text_ptr, str, size);
55    text_ptr += size;
56    text_size += size;
57    *text_ptr = 0;
58}
59
60void alloc_string(const char *str, int size)
61{
62    text = malloc(size + 1);
63    memcpy(text, str, size);
64    text[size] = 0;
65}
66%}
67
68ws  [ \n\t]
69n   [A-Za-z0-9_]
70
71%%
72    int str = 0;
73    int ts, i;
74
75[ \t]*#.*\n current_file->lineno++;
76[ \t]*#.*
77
78[ \t]*\n    current_file->lineno++; return T_EOL;
79
80[ \t]+  {
81    BEGIN(COMMAND);
82}
83
84.   {
85    unput(yytext[0]);
86    BEGIN(COMMAND);
87}
88
89
90<COMMAND>{
91    "mainmenu"      BEGIN(PARAM); return T_MAINMENU;
92    "menu"          BEGIN(PARAM); return T_MENU;
93    "endmenu"       BEGIN(PARAM); return T_ENDMENU;
94    "source"        BEGIN(PARAM); return T_SOURCE;
95    "choice"        BEGIN(PARAM); return T_CHOICE;
96    "endchoice"     BEGIN(PARAM); return T_ENDCHOICE;
97    "comment"       BEGIN(PARAM); return T_COMMENT;
98    "config"        BEGIN(PARAM); return T_CONFIG;
99    "menuconfig"        BEGIN(PARAM); return T_MENUCONFIG;
100    "help"          BEGIN(PARAM); return T_HELP;
101    "if"            BEGIN(PARAM); return T_IF;
102    "endif"         BEGIN(PARAM); return T_ENDIF;
103    "depends"       BEGIN(PARAM); return T_DEPENDS;
104    "requires"      BEGIN(PARAM); return T_REQUIRES;
105    "optional"      BEGIN(PARAM); return T_OPTIONAL;
106    "default"       BEGIN(PARAM); return T_DEFAULT;
107    "prompt"        BEGIN(PARAM); return T_PROMPT;
108    "tristate"      BEGIN(PARAM); return T_TRISTATE;
109    "def_tristate"      BEGIN(PARAM); return T_DEF_TRISTATE;
110    "bool"          BEGIN(PARAM); return T_BOOLEAN;
111    "boolean"       BEGIN(PARAM); return T_BOOLEAN;
112    "def_bool"      BEGIN(PARAM); return T_DEF_BOOLEAN;
113    "def_boolean"       BEGIN(PARAM); return T_DEF_BOOLEAN;
114    "int"           BEGIN(PARAM); return T_INT;
115    "hex"           BEGIN(PARAM); return T_HEX;
116    "string"        BEGIN(PARAM); return T_STRING;
117    "select"        BEGIN(PARAM); return T_SELECT;
118    "enable"        BEGIN(PARAM); return T_SELECT;
119    "range"         BEGIN(PARAM); return T_RANGE;
120    {n}+    {
121        alloc_string(yytext, yyleng);
122        zconflval.string = text;
123        return T_WORD;
124    }
125    .
126    \n  current_file->lineno++; BEGIN(INITIAL);
127}
128
129<PARAM>{
130    "&&"    return T_AND;
131    "||"    return T_OR;
132    "(" return T_OPEN_PAREN;
133    ")" return T_CLOSE_PAREN;
134    "!" return T_NOT;
135    "=" return T_EQUAL;
136    "!="    return T_UNEQUAL;
137    "if"    return T_IF;
138    "on"    return T_ON;
139    \"|\'   {
140        str = yytext[0];
141        new_string();
142        BEGIN(STRING);
143    }
144    \n  BEGIN(INITIAL); current_file->lineno++; return T_EOL;
145    --- /* ignore */
146    ({n}|[-/.])+    {
147        alloc_string(yytext, yyleng);
148        zconflval.string = text;
149        return T_WORD;
150    }
151    #.* /* comment */
152    \\\n    current_file->lineno++;
153    .
154    <<EOF>> {
155        BEGIN(INITIAL);
156    }
157}
158
159<STRING>{
160    [^'"\\\n]+/\n   {
161        append_string(yytext, yyleng);
162        zconflval.string = text;
163        return T_WORD_QUOTE;
164    }
165    [^'"\\\n]+  {
166        append_string(yytext, yyleng);
167    }
168    \\.?/\n {
169        append_string(yytext + 1, yyleng - 1);
170        zconflval.string = text;
171        return T_WORD_QUOTE;
172    }
173    \\.?    {
174        append_string(yytext + 1, yyleng - 1);
175    }
176    \'|\"   {
177        if (str == yytext[0]) {
178            BEGIN(PARAM);
179            zconflval.string = text;
180            return T_WORD_QUOTE;
181        } else
182            append_string(yytext, 1);
183    }
184    \n  {
185        printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno());
186        current_file->lineno++;
187        BEGIN(INITIAL);
188        return T_EOL;
189    }
190    <<EOF>> {
191        BEGIN(INITIAL);
192    }
193}
194
195<HELP>{
196    [ \t]+  {
197        ts = 0;
198        for (i = 0; i < yyleng; i++) {
199            if (yytext[i] == '\t')
200                ts = (ts & ~7) + 8;
201            else
202                ts++;
203        }
204        last_ts = ts;
205        if (first_ts) {
206            if (ts < first_ts) {
207                zconf_endhelp();
208                return T_HELPTEXT;
209            }
210            ts -= first_ts;
211            while (ts > 8) {
212                append_string("        ", 8);
213                ts -= 8;
214            }
215            append_string("        ", ts);
216        }
217    }
218    [ \t]*\n/[^ \t\n] {
219        current_file->lineno++;
220        zconf_endhelp();
221        return T_HELPTEXT;
222    }
223    [ \t]*\n    {
224        current_file->lineno++;
225        append_string("\n", 1);
226    }
227    [^ \t\n].* {
228        append_string(yytext, yyleng);
229        if (!first_ts)
230            first_ts = last_ts;
231    }
232    <<EOF>> {
233        zconf_endhelp();
234        return T_HELPTEXT;
235    }
236}
237
238<<EOF>> {
239    if (current_buf) {
240        zconf_endfile();
241        return T_EOF;
242    }
243    fclose(yyin);
244    yyterminate();
245}
246
247%%
248void zconf_starthelp(void)
249{
250    new_string();
251    last_ts = first_ts = 0;
252    BEGIN(HELP);
253}
254
255static void zconf_endhelp(void)
256{
257    zconflval.string = text;
258    BEGIN(INITIAL);
259}
260
261
262/*
263 * Try to open specified file with following names:
264 * ./name
265 * $(srctree)/name
266 * The latter is used when srctree is separate from objtree
267 * when compiling the kernel.
268 * Return NULL if file is not found.
269 */
270FILE *zconf_fopen(const char *name)
271{
272    char *env, fullname[PATH_MAX+1];
273    FILE *f;
274
275    f = fopen(name, "r");
276    if (!f && name[0] != '/') {
277        env = getenv(SRCTREE);
278        if (env) {
279            sprintf(fullname, "%s/%s", env, name);
280            f = fopen(fullname, "r");
281        }
282    }
283    return f;
284}
285
286void zconf_initscan(const char *name)
287{
288    yyin = zconf_fopen(name);
289    if (!yyin) {
290        printf("can't find file %s\n", name);
291        exit(1);
292    }
293
294    current_buf = malloc(sizeof(*current_buf));
295    memset(current_buf, 0, sizeof(*current_buf));
296
297    current_file = file_lookup(name);
298    current_file->lineno = 1;
299    current_file->flags = FILE_BUSY;
300}
301
302void zconf_nextfile(const char *name)
303{
304    struct file *file = file_lookup(name);
305    struct buffer *buf = malloc(sizeof(*buf));
306    memset(buf, 0, sizeof(*buf));
307
308    current_buf->state = YY_CURRENT_BUFFER;
309    yyin = zconf_fopen(name);
310    if (!yyin) {
311        printf("%s:%d: can't open file \"%s\"\n", zconf_curname(), zconf_lineno(), name);
312        exit(1);
313    }
314    yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
315    buf->parent = current_buf;
316    current_buf = buf;
317
318    if (file->flags & FILE_BUSY) {
319        printf("recursive scan (%s)?\n", name);
320        exit(1);
321    }
322    if (file->flags & FILE_SCANNED) {
323        printf("file %s already scanned?\n", name);
324        exit(1);
325    }
326    file->flags |= FILE_BUSY;
327    file->lineno = 1;
328    file->parent = current_file;
329    current_file = file;
330}
331
332static struct buffer *zconf_endfile(void)
333{
334    struct buffer *parent;
335
336    current_file->flags |= FILE_SCANNED;
337    current_file->flags &= ~FILE_BUSY;
338    current_file = current_file->parent;
339
340    parent = current_buf->parent;
341    if (parent) {
342        fclose(yyin);
343        yy_delete_buffer(YY_CURRENT_BUFFER);
344        yy_switch_to_buffer(parent->state);
345    }
346    free(current_buf);
347    current_buf = parent;
348
349    return parent;
350}
351
352int zconf_lineno(void)
353{
354    if (current_buf)
355        return current_file->lineno - 1;
356    else
357        return 0;
358}
359
360char *zconf_curname(void)
361{
362    if (current_buf)
363        return current_file->name;
364    else
365        return "<none>";
366}
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