Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Roman Zippel | 7a88488 | 2005-11-08 21:34:51 -0800 | [diff] [blame^] | 21 | static char *text; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | static int text_size, text_asize; |
| 23 | |
| 24 | struct buffer { |
| 25 | struct buffer *parent; |
| 26 | YY_BUFFER_STATE state; |
| 27 | }; |
| 28 | |
| 29 | struct buffer *current_buf; |
| 30 | |
| 31 | static int last_ts, first_ts; |
| 32 | |
| 33 | static void zconf_endhelp(void); |
| 34 | static struct buffer *zconf_endfile(void); |
| 35 | |
| 36 | void new_string(void) |
| 37 | { |
| 38 | text = malloc(START_STRSIZE); |
| 39 | text_asize = START_STRSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | text_size = 0; |
Roman Zippel | 7a88488 | 2005-11-08 21:34:51 -0800 | [diff] [blame^] | 41 | *text = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | } |
| 43 | |
| 44 | void append_string(const char *str, int size) |
| 45 | { |
| 46 | int new_size = text_size + size + 1; |
| 47 | if (new_size > text_asize) { |
Roman Zippel | 7a88488 | 2005-11-08 21:34:51 -0800 | [diff] [blame^] | 48 | new_size += START_STRSIZE - 1; |
| 49 | new_size &= -START_STRSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | text = realloc(text, new_size); |
| 51 | text_asize = new_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | } |
Roman Zippel | 7a88488 | 2005-11-08 21:34:51 -0800 | [diff] [blame^] | 53 | memcpy(text + text_size, str, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | text_size += size; |
Roman Zippel | 7a88488 | 2005-11-08 21:34:51 -0800 | [diff] [blame^] | 55 | text[text_size] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | } |
| 57 | |
| 58 | void alloc_string(const char *str, int size) |
| 59 | { |
| 60 | text = malloc(size + 1); |
| 61 | memcpy(text, str, size); |
| 62 | text[size] = 0; |
| 63 | } |
| 64 | %} |
| 65 | |
| 66 | ws [ \n\t] |
| 67 | n [A-Za-z0-9_] |
| 68 | |
| 69 | %% |
| 70 | int str = 0; |
| 71 | int ts, i; |
| 72 | |
| 73 | [ \t]*#.*\n current_file->lineno++; |
| 74 | [ \t]*#.* |
| 75 | |
| 76 | [ \t]*\n current_file->lineno++; return T_EOL; |
| 77 | |
| 78 | [ \t]+ { |
| 79 | BEGIN(COMMAND); |
| 80 | } |
| 81 | |
| 82 | . { |
| 83 | unput(yytext[0]); |
| 84 | BEGIN(COMMAND); |
| 85 | } |
| 86 | |
| 87 | |
| 88 | <COMMAND>{ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | {n}+ { |
Roman Zippel | 7a88488 | 2005-11-08 21:34:51 -0800 | [diff] [blame^] | 90 | struct kconf_id *id = kconf_id_lookup(yytext, yyleng); |
| 91 | if (id && id->flags & TF_COMMAND) { |
| 92 | BEGIN(PARAM); |
| 93 | return id->token; |
| 94 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | alloc_string(yytext, yyleng); |
| 96 | zconflval.string = text; |
| 97 | return T_WORD; |
| 98 | } |
| 99 | . |
| 100 | \n current_file->lineno++; BEGIN(INITIAL); |
| 101 | } |
| 102 | |
| 103 | <PARAM>{ |
| 104 | "&&" return T_AND; |
| 105 | "||" return T_OR; |
| 106 | "(" return T_OPEN_PAREN; |
| 107 | ")" return T_CLOSE_PAREN; |
| 108 | "!" return T_NOT; |
| 109 | "=" return T_EQUAL; |
| 110 | "!=" return T_UNEQUAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | \"|\' { |
| 112 | str = yytext[0]; |
| 113 | new_string(); |
| 114 | BEGIN(STRING); |
| 115 | } |
| 116 | \n BEGIN(INITIAL); current_file->lineno++; return T_EOL; |
| 117 | --- /* ignore */ |
| 118 | ({n}|[-/.])+ { |
Roman Zippel | 7a88488 | 2005-11-08 21:34:51 -0800 | [diff] [blame^] | 119 | struct kconf_id *id = kconf_id_lookup(yytext, yyleng); |
| 120 | if (id && id->flags & TF_PARAM) |
| 121 | return id->token; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | alloc_string(yytext, yyleng); |
| 123 | zconflval.string = text; |
| 124 | return T_WORD; |
| 125 | } |
| 126 | #.* /* comment */ |
| 127 | \\\n current_file->lineno++; |
| 128 | . |
| 129 | <<EOF>> { |
| 130 | BEGIN(INITIAL); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | <STRING>{ |
| 135 | [^'"\\\n]+/\n { |
| 136 | append_string(yytext, yyleng); |
| 137 | zconflval.string = text; |
| 138 | return T_WORD_QUOTE; |
| 139 | } |
| 140 | [^'"\\\n]+ { |
| 141 | append_string(yytext, yyleng); |
| 142 | } |
| 143 | \\.?/\n { |
| 144 | append_string(yytext + 1, yyleng - 1); |
| 145 | zconflval.string = text; |
| 146 | return T_WORD_QUOTE; |
| 147 | } |
| 148 | \\.? { |
| 149 | append_string(yytext + 1, yyleng - 1); |
| 150 | } |
| 151 | \'|\" { |
| 152 | if (str == yytext[0]) { |
| 153 | BEGIN(PARAM); |
| 154 | zconflval.string = text; |
| 155 | return T_WORD_QUOTE; |
| 156 | } else |
| 157 | append_string(yytext, 1); |
| 158 | } |
| 159 | \n { |
| 160 | printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno()); |
| 161 | current_file->lineno++; |
| 162 | BEGIN(INITIAL); |
| 163 | return T_EOL; |
| 164 | } |
| 165 | <<EOF>> { |
| 166 | BEGIN(INITIAL); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | <HELP>{ |
| 171 | [ \t]+ { |
| 172 | ts = 0; |
| 173 | for (i = 0; i < yyleng; i++) { |
| 174 | if (yytext[i] == '\t') |
| 175 | ts = (ts & ~7) + 8; |
| 176 | else |
| 177 | ts++; |
| 178 | } |
| 179 | last_ts = ts; |
| 180 | if (first_ts) { |
| 181 | if (ts < first_ts) { |
| 182 | zconf_endhelp(); |
| 183 | return T_HELPTEXT; |
| 184 | } |
| 185 | ts -= first_ts; |
| 186 | while (ts > 8) { |
| 187 | append_string(" ", 8); |
| 188 | ts -= 8; |
| 189 | } |
| 190 | append_string(" ", ts); |
| 191 | } |
| 192 | } |
| 193 | [ \t]*\n/[^ \t\n] { |
| 194 | current_file->lineno++; |
| 195 | zconf_endhelp(); |
| 196 | return T_HELPTEXT; |
| 197 | } |
| 198 | [ \t]*\n { |
| 199 | current_file->lineno++; |
| 200 | append_string("\n", 1); |
| 201 | } |
| 202 | [^ \t\n].* { |
| 203 | append_string(yytext, yyleng); |
| 204 | if (!first_ts) |
| 205 | first_ts = last_ts; |
| 206 | } |
| 207 | <<EOF>> { |
| 208 | zconf_endhelp(); |
| 209 | return T_HELPTEXT; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | <<EOF>> { |
| 214 | if (current_buf) { |
| 215 | zconf_endfile(); |
| 216 | return T_EOF; |
| 217 | } |
| 218 | fclose(yyin); |
| 219 | yyterminate(); |
| 220 | } |
| 221 | |
| 222 | %% |
| 223 | void zconf_starthelp(void) |
| 224 | { |
| 225 | new_string(); |
| 226 | last_ts = first_ts = 0; |
| 227 | BEGIN(HELP); |
| 228 | } |
| 229 | |
| 230 | static void zconf_endhelp(void) |
| 231 | { |
| 232 | zconflval.string = text; |
| 233 | BEGIN(INITIAL); |
| 234 | } |
| 235 | |
| 236 | |
| 237 | /* |
| 238 | * Try to open specified file with following names: |
| 239 | * ./name |
| 240 | * $(srctree)/name |
| 241 | * The latter is used when srctree is separate from objtree |
| 242 | * when compiling the kernel. |
| 243 | * Return NULL if file is not found. |
| 244 | */ |
| 245 | FILE *zconf_fopen(const char *name) |
| 246 | { |
| 247 | char *env, fullname[PATH_MAX+1]; |
| 248 | FILE *f; |
| 249 | |
| 250 | f = fopen(name, "r"); |
| 251 | if (!f && name[0] != '/') { |
| 252 | env = getenv(SRCTREE); |
| 253 | if (env) { |
| 254 | sprintf(fullname, "%s/%s", env, name); |
| 255 | f = fopen(fullname, "r"); |
| 256 | } |
| 257 | } |
| 258 | return f; |
| 259 | } |
| 260 | |
| 261 | void zconf_initscan(const char *name) |
| 262 | { |
| 263 | yyin = zconf_fopen(name); |
| 264 | if (!yyin) { |
| 265 | printf("can't find file %s\n", name); |
| 266 | exit(1); |
| 267 | } |
| 268 | |
| 269 | current_buf = malloc(sizeof(*current_buf)); |
| 270 | memset(current_buf, 0, sizeof(*current_buf)); |
| 271 | |
| 272 | current_file = file_lookup(name); |
| 273 | current_file->lineno = 1; |
| 274 | current_file->flags = FILE_BUSY; |
| 275 | } |
| 276 | |
| 277 | void zconf_nextfile(const char *name) |
| 278 | { |
| 279 | struct file *file = file_lookup(name); |
| 280 | struct buffer *buf = malloc(sizeof(*buf)); |
| 281 | memset(buf, 0, sizeof(*buf)); |
| 282 | |
| 283 | current_buf->state = YY_CURRENT_BUFFER; |
| 284 | yyin = zconf_fopen(name); |
| 285 | if (!yyin) { |
| 286 | printf("%s:%d: can't open file \"%s\"\n", zconf_curname(), zconf_lineno(), name); |
| 287 | exit(1); |
| 288 | } |
| 289 | yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE)); |
| 290 | buf->parent = current_buf; |
| 291 | current_buf = buf; |
| 292 | |
| 293 | if (file->flags & FILE_BUSY) { |
| 294 | printf("recursive scan (%s)?\n", name); |
| 295 | exit(1); |
| 296 | } |
| 297 | if (file->flags & FILE_SCANNED) { |
| 298 | printf("file %s already scanned?\n", name); |
| 299 | exit(1); |
| 300 | } |
| 301 | file->flags |= FILE_BUSY; |
| 302 | file->lineno = 1; |
| 303 | file->parent = current_file; |
| 304 | current_file = file; |
| 305 | } |
| 306 | |
| 307 | static struct buffer *zconf_endfile(void) |
| 308 | { |
| 309 | struct buffer *parent; |
| 310 | |
| 311 | current_file->flags |= FILE_SCANNED; |
| 312 | current_file->flags &= ~FILE_BUSY; |
| 313 | current_file = current_file->parent; |
| 314 | |
| 315 | parent = current_buf->parent; |
| 316 | if (parent) { |
| 317 | fclose(yyin); |
| 318 | yy_delete_buffer(YY_CURRENT_BUFFER); |
| 319 | yy_switch_to_buffer(parent->state); |
| 320 | } |
| 321 | free(current_buf); |
| 322 | current_buf = parent; |
| 323 | |
| 324 | return parent; |
| 325 | } |
| 326 | |
| 327 | int zconf_lineno(void) |
| 328 | { |
| 329 | if (current_buf) |
| 330 | return current_file->lineno - 1; |
| 331 | else |
| 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | char *zconf_curname(void) |
| 336 | { |
| 337 | if (current_buf) |
| 338 | return current_file->name; |
| 339 | else |
| 340 | return "<none>"; |
| 341 | } |