| 1 | /****************************************************************************** |
| 2 | * Copyright (c) 2000-2015 Ericsson Telecom AB |
| 3 | * All rights reserved. This program and the accompanying materials |
| 4 | * are made available under the terms of the Eclipse Public License v1.0 |
| 5 | * which accompanies this distribution, and is available at |
| 6 | * http://www.eclipse.org/legal/epl-v10.html |
| 7 | ******************************************************************************/ |
| 8 | |
| 9 | /* |
| 10 | * bison lexical analyzer |
| 11 | * |
| 12 | * Written by Matyas Forstner using bison's scan-gram.l |
| 13 | * 20050908 |
| 14 | */ |
| 15 | |
| 16 | /* %option debug */ |
| 17 | %option nodefault nounput noyywrap never-interactive |
| 18 | %option yylineno |
| 19 | %option prefix="bison_" |
| 20 | |
| 21 | %{ /* ****************** C declarations ***************** */ |
| 22 | |
| 23 | #include "../compiler2/string.hh" |
| 24 | #include "Symbol.hh" |
| 25 | #include "Rule.hh" |
| 26 | #include "bison_p.tab.hh" |
| 27 | #include <limits.h> |
| 28 | #include <errno.h> |
| 29 | |
| 30 | #define lval bison_lval |
| 31 | |
| 32 | static int convert_ucn_to_byte (char const *hex_text); |
| 33 | |
| 34 | %} /* ***************** definitions ***************** */ |
| 35 | |
| 36 | %x SC_COMMENT SC_LINE_COMMENT SC_YACC_COMMENT |
| 37 | %x SC_STRING SC_CHARACTER |
| 38 | %x SC_AFTER_IDENTIFIER |
| 39 | %x SC_ESCAPED_STRING SC_ESCAPED_CHARACTER |
| 40 | %x SC_PRE_CODE SC_BRACED_CODE SC_PROLOGUE SC_EPILOGUE |
| 41 | |
| 42 | letter [.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_] |
| 43 | id {letter}({letter}|[0-9])* |
| 44 | directive %{letter}({letter}|[0-9]|-)* |
| 45 | int [0-9]+ |
| 46 | |
| 47 | tag [^\0\n>]+ |
| 48 | |
| 49 | /* Zero or more instances of backslash-newline. Following GCC, allow |
| 50 | white space between the backslash and the newline. */ |
| 51 | splice (\\[ \f\t\v]*\n)* |
| 52 | |
| 53 | %% /* ***************** rules ************************* */ |
| 54 | |
| 55 | %{ |
| 56 | /* Nesting level of the current code in braces. */ |
| 57 | int braces_level=0; |
| 58 | |
| 59 | /* Parent context state, when applicable. */ |
| 60 | int context_state=0; |
| 61 | |
| 62 | /* Token type to return, when applicable. */ |
| 63 | int token_type=0; |
| 64 | |
| 65 | %} |
| 66 | |
| 67 | /*-----------------------. |
| 68 | | Scanning white space. | |
| 69 | `-----------------------*/ |
| 70 | |
| 71 | <INITIAL,SC_AFTER_IDENTIFIER,SC_PRE_CODE> |
| 72 | { |
| 73 | /* Comments and white space. */ |
| 74 | "," /*warn_at (*loc, _("stray `,' treated as white space"));*/ |
| 75 | [ \f\n\t\v] | |
| 76 | "//".* ; |
| 77 | "/*" { |
| 78 | context_state = YY_START; |
| 79 | BEGIN SC_YACC_COMMENT; |
| 80 | } |
| 81 | |
| 82 | /* #line directives are not documented, and may be withdrawn or |
| 83 | modified in future versions of Bison. */ |
| 84 | ^"#line "{int}" \"".*"\"\n" { |
| 85 | ; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | /*----------------------------. |
| 90 | | Scanning Bison directives. | |
| 91 | `----------------------------*/ |
| 92 | <INITIAL> |
| 93 | { |
| 94 | "%binary" return PERCENT_NONASSOC; |
| 95 | "%debug" return PERCENT_DEBUG; |
| 96 | "%default"[-_]"prec" return PERCENT_DEFAULT_PREC; |
| 97 | "%define" return PERCENT_DEFINE; |
| 98 | "%defines" return PERCENT_DEFINES; |
| 99 | "%destructor" token_type = PERCENT_DESTRUCTOR; BEGIN SC_PRE_CODE; |
| 100 | "%dprec" return PERCENT_DPREC; |
| 101 | "%error"[-_]"verbose" return PERCENT_ERROR_VERBOSE; |
| 102 | "%expect" return PERCENT_EXPECT; |
| 103 | "%expect"[-_]"rr" return PERCENT_EXPECT_RR; |
| 104 | "%file-prefix" return PERCENT_FILE_PREFIX; |
| 105 | "%fixed"[-_]"output"[-_]"files" return PERCENT_YACC; |
| 106 | "%initial-action" token_type = PERCENT_INITIAL_ACTION; BEGIN SC_PRE_CODE; |
| 107 | "%glr-parser" return PERCENT_GLR_PARSER; |
| 108 | "%left" return PERCENT_LEFT; |
| 109 | "%lex-param" token_type = PERCENT_LEX_PARAM; BEGIN SC_PRE_CODE; |
| 110 | "%locations" return PERCENT_LOCATIONS; |
| 111 | "%merge" return PERCENT_MERGE; |
| 112 | "%name"[-_]"prefix" return PERCENT_NAME_PREFIX; |
| 113 | "%no"[-_]"default"[-_]"prec" return PERCENT_NO_DEFAULT_PREC; |
| 114 | "%no"[-_]"lines" return PERCENT_NO_LINES; |
| 115 | "%nonassoc" return PERCENT_NONASSOC; |
| 116 | "%nondeterministic-parser" return PERCENT_NONDETERMINISTIC_PARSER; |
| 117 | "%nterm" return PERCENT_NTERM; |
| 118 | "%output" return PERCENT_OUTPUT; |
| 119 | "%parse-param" token_type = PERCENT_PARSE_PARAM; BEGIN SC_PRE_CODE; |
| 120 | "%prec" return PERCENT_PREC; |
| 121 | "%printer" token_type = PERCENT_PRINTER; BEGIN SC_PRE_CODE; |
| 122 | "%pure"[-_]"parser" return PERCENT_PURE_PARSER; |
| 123 | "%right" return PERCENT_RIGHT; |
| 124 | "%skeleton" return PERCENT_SKELETON; |
| 125 | "%start" return PERCENT_START; |
| 126 | "%term" return PERCENT_TOKEN; |
| 127 | "%token" return PERCENT_TOKEN; |
| 128 | "%token"[-_]"table" return PERCENT_TOKEN_TABLE; |
| 129 | "%type" return PERCENT_TYPE; |
| 130 | "%union" token_type = PERCENT_UNION; BEGIN SC_PRE_CODE; |
| 131 | "%verbose" return PERCENT_VERBOSE; |
| 132 | "%yacc" return PERCENT_YACC; |
| 133 | |
| 134 | {directive} { |
| 135 | /*complain_at (*loc, _("invalid directive: %s"), quote (yytext));*/ |
| 136 | } |
| 137 | |
| 138 | "=" return EQUAL; |
| 139 | "|" return PIPE; |
| 140 | ";" return SEMICOLON; |
| 141 | |
| 142 | {id} { |
| 143 | //val->symbol = symbol_get (yytext, *loc); |
| 144 | lval.string_val=new string(yytext); |
| 145 | BEGIN SC_AFTER_IDENTIFIER; |
| 146 | } |
| 147 | |
| 148 | {int} { |
| 149 | //lval.integer = scan_integer (yytext, 10); |
| 150 | return INT; |
| 151 | } |
| 152 | 0[xX][0-9abcdefABCDEF]+ { |
| 153 | //lval.integer = scan_integer (yytext, 16); |
| 154 | return INT; |
| 155 | } |
| 156 | |
| 157 | /* Characters. We don't check there is only one. */ |
| 158 | "'" /* +\' */ lval.string_val=new string("'"); BEGIN SC_ESCAPED_CHARACTER; |
| 159 | |
| 160 | /* Strings. */ |
| 161 | "\"" lval.string_val=new string("\""); BEGIN SC_ESCAPED_STRING; |
| 162 | |
| 163 | /* Prologue. */ |
| 164 | "%{" BEGIN SC_PROLOGUE; |
| 165 | |
| 166 | /* Code in between braces. */ |
| 167 | "{" { |
| 168 | //STRING_GROW; |
| 169 | token_type = BRACED_CODE; |
| 170 | braces_level = 0; |
| 171 | BEGIN SC_BRACED_CODE; |
| 172 | } |
| 173 | |
| 174 | /* A type. */ |
| 175 | "<"{tag}">" { |
| 176 | /* |
| 177 | obstack_grow (&obstack_for_string, yytext + 1, yyleng - 2); |
| 178 | STRING_FINISH; |
| 179 | val->uniqstr = uniqstr_new (last_string); |
| 180 | STRING_FREE; |
| 181 | */ |
| 182 | return TYPE; |
| 183 | } |
| 184 | |
| 185 | "%%" { |
| 186 | static int percent_percent_count; |
| 187 | if (++percent_percent_count == 2) |
| 188 | BEGIN SC_EPILOGUE; |
| 189 | return PERCENT_PERCENT; |
| 190 | } |
| 191 | |
| 192 | . { |
| 193 | //complain_at (*loc, _("invalid character: %s"), quote (yytext)); |
| 194 | } |
| 195 | |
| 196 | <<EOF>> { |
| 197 | yyterminate (); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | |
| 202 | /*-----------------------------------------------------------------. |
| 203 | | Scanning after an identifier, checking whether a colon is next. | |
| 204 | `-----------------------------------------------------------------*/ |
| 205 | |
| 206 | <SC_AFTER_IDENTIFIER> |
| 207 | { |
| 208 | ":" { |
| 209 | BEGIN INITIAL; |
| 210 | return ID_COLON; |
| 211 | } |
| 212 | . { |
| 213 | yyless (0); |
| 214 | BEGIN INITIAL; |
| 215 | return ID; |
| 216 | } |
| 217 | <<EOF>> { |
| 218 | BEGIN INITIAL; |
| 219 | return ID; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | |
| 224 | |
| 225 | /*---------------------------------------------------------------. |
| 226 | | Scanning a Yacc comment. The initial `/ *' is already eaten. | |
| 227 | `---------------------------------------------------------------*/ |
| 228 | |
| 229 | <SC_YACC_COMMENT> |
| 230 | { |
| 231 | "*/" BEGIN context_state; |
| 232 | .|\n ; |
| 233 | <<EOF>> /*unexpected_eof (token_start, "* /");*/ BEGIN context_state; |
| 234 | } |
| 235 | |
| 236 | |
| 237 | /*------------------------------------------------------------. |
| 238 | | Scanning a C comment. The initial `/ *' is already eaten. | |
| 239 | `------------------------------------------------------------*/ |
| 240 | |
| 241 | <SC_COMMENT> |
| 242 | { |
| 243 | "*"{splice}"/" /*STRING_GROW;*/ BEGIN context_state; |
| 244 | <<EOF>> /*unexpected_eof (token_start, "* /");*/ BEGIN context_state; |
| 245 | } |
| 246 | |
| 247 | |
| 248 | /*--------------------------------------------------------------. |
| 249 | | Scanning a line comment. The initial `//' is already eaten. | |
| 250 | `--------------------------------------------------------------*/ |
| 251 | |
| 252 | <SC_LINE_COMMENT> |
| 253 | { |
| 254 | "\n" /*STRING_GROW;*/ BEGIN context_state; |
| 255 | {splice} /*STRING_GROW;*/ |
| 256 | <<EOF>> BEGIN context_state; |
| 257 | } |
| 258 | |
| 259 | |
| 260 | /*------------------------------------------------. |
| 261 | | Scanning a Bison string, including its escapes. | |
| 262 | | The initial quote is already eaten. | |
| 263 | `------------------------------------------------*/ |
| 264 | |
| 265 | <SC_ESCAPED_STRING> |
| 266 | { |
| 267 | "\"" { |
| 268 | /* |
| 269 | STRING_GROW; |
| 270 | STRING_FINISH; |
| 271 | loc->start = token_start; |
| 272 | val->chars = last_string; |
| 273 | rule_length++; |
| 274 | */ |
| 275 | *lval.string_val+="\""; |
| 276 | BEGIN INITIAL; |
| 277 | return STRING; |
| 278 | } |
| 279 | |
| 280 | \n /*unexpected_newline (token_start, "\"");*/ delete lval.string_val; BEGIN INITIAL; |
| 281 | |
| 282 | <<EOF>> /*unexpected_eof (token_start, "\"");*/ delete lval.string_val; BEGIN INITIAL; |
| 283 | |
| 284 | . *lval.string_val+=yytext; |
| 285 | |
| 286 | } |
| 287 | |
| 288 | |
| 289 | /*----------------------------------------------------------. |
| 290 | | Scanning a Bison character literal, decoding its escapes. | |
| 291 | | The initial quote is already eaten. | |
| 292 | `----------------------------------------------------------*/ |
| 293 | |
| 294 | <SC_ESCAPED_CHARACTER> |
| 295 | { |
| 296 | "'" { |
| 297 | /* |
| 298 | unsigned char last_string_1; |
| 299 | STRING_GROW; |
| 300 | STRING_FINISH; |
| 301 | loc->start = token_start; |
| 302 | val->symbol = symbol_get (last_string, *loc); |
| 303 | symbol_class_set (val->symbol, token_sym, *loc); |
| 304 | last_string_1 = last_string[1]; |
| 305 | symbol_user_token_number_set (val->symbol, last_string_1, *loc); |
| 306 | STRING_FREE; |
| 307 | rule_length++; |
| 308 | */ |
| 309 | *lval.string_val+="'"; |
| 310 | BEGIN INITIAL; |
| 311 | return ID; |
| 312 | } |
| 313 | |
| 314 | \n /*unexpected_newline (token_start, "'");*/ delete lval.string_val; BEGIN INITIAL; |
| 315 | |
| 316 | <<EOF>> /*unexpected_eof (token_start, "'");*/ delete lval.string_val; BEGIN INITIAL; |
| 317 | |
| 318 | . *lval.string_val+=yytext; |
| 319 | } |
| 320 | |
| 321 | <SC_ESCAPED_CHARACTER,SC_ESCAPED_STRING> |
| 322 | { |
| 323 | \0 /*complain_at (*loc, _("invalid null character"));*/ |
| 324 | } |
| 325 | |
| 326 | |
| 327 | /*----------------------------. |
| 328 | | Decode escaped characters. | |
| 329 | `----------------------------*/ |
| 330 | |
| 331 | <SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER> |
| 332 | { |
| 333 | \\[0-7]{1,3} { |
| 334 | unsigned long int c = strtoul (yytext + 1, 0, 8); |
| 335 | if (UCHAR_MAX < c) |
| 336 | /*complain_at (*loc, _("invalid escape sequence: %s"), quote (yytext))*/; |
| 337 | else if (! c) |
| 338 | /*complain_at (*loc, _("invalid null character: %s"), quote (yytext))*/; |
| 339 | else |
| 340 | /*obstack_1grow (&obstack_for_string, c);*/ *lval.string_val+=c; |
| 341 | } |
| 342 | |
| 343 | \\x[0-9abcdefABCDEF]+ { |
| 344 | unsigned long int c; |
| 345 | errno=0; |
| 346 | c = strtoul (yytext + 2, 0, 16); |
| 347 | if (UCHAR_MAX < c || errno) |
| 348 | /*complain_at (*loc, _("invalid escape sequence: %s"), quote (yytext))*/; |
| 349 | else if (! c) |
| 350 | /*complain_at (*loc, _("invalid null character: %s"), quote (yytext))*/; |
| 351 | else |
| 352 | /*obstack_1grow (&obstack_for_string, c);*/ *lval.string_val+=c; |
| 353 | } |
| 354 | |
| 355 | \\a /*obstack_1grow (&obstack_for_string, '\a');*/ *lval.string_val+='\a'; |
| 356 | \\b /*obstack_1grow (&obstack_for_string, '\b');*/ *lval.string_val+='\b'; |
| 357 | \\f /*obstack_1grow (&obstack_for_string, '\f');*/ *lval.string_val+='\f'; |
| 358 | \\n /*obstack_1grow (&obstack_for_string, '\n');*/ *lval.string_val+='\n'; |
| 359 | \\r /*obstack_1grow (&obstack_for_string, '\r');*/ *lval.string_val+='\r'; |
| 360 | \\t /*obstack_1grow (&obstack_for_string, '\t');*/ *lval.string_val+='\t'; |
| 361 | \\v /*obstack_1grow (&obstack_for_string, '\v');*/ *lval.string_val+='\v'; |
| 362 | |
| 363 | /* \\[\"\'?\\] would be shorter, but it confuses xgettext. */ |
| 364 | \\("\""|"'"|"?"|"\\") /*obstack_1grow (&obstack_for_string, yytext[1]);*/ *lval.string_val+=yytext[1]; |
| 365 | |
| 366 | \\(u|U[0-9abcdefABCDEF]{4})[0-9abcdefABCDEF]{4} { |
| 367 | int c = convert_ucn_to_byte (yytext); |
| 368 | if (c < 0) |
| 369 | /*complain_at (*loc, _("invalid escape sequence: %s"), quote (yytext))*/; |
| 370 | else if (! c) |
| 371 | /*complain_at (*loc, _("invalid null character: %s"), quote (yytext))*/; |
| 372 | else |
| 373 | /*obstack_1grow (&obstack_for_string, c);*/ *lval.string_val+=c; |
| 374 | } |
| 375 | \\(.|\n) { |
| 376 | /* |
| 377 | complain_at (*loc, _("unrecognized escape sequence: %s"), quote (yytext)); |
| 378 | STRING_GROW; |
| 379 | */ |
| 380 | *lval.string_val+=yytext; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | |
| 385 | /*--------------------------------------------. |
| 386 | | Scanning user-code characters and strings. | |
| 387 | `--------------------------------------------*/ |
| 388 | |
| 389 | <SC_CHARACTER,SC_STRING> |
| 390 | { |
| 391 | {splice}|\\{splice}[^\n$@\[\]] /*STRING_GROW;*/ |
| 392 | } |
| 393 | |
| 394 | <SC_CHARACTER> |
| 395 | { |
| 396 | "'" /*STRING_GROW;*/ BEGIN context_state; |
| 397 | \n /*unexpected_newline (token_start, "'");*/ BEGIN context_state; |
| 398 | <<EOF>> /*unexpected_eof (token_start, "'");*/ BEGIN context_state; |
| 399 | } |
| 400 | |
| 401 | <SC_STRING> |
| 402 | { |
| 403 | "\"" /*STRING_GROW;*/ BEGIN context_state; |
| 404 | \n /*unexpected_newline (token_start, "\"");*/ BEGIN context_state; |
| 405 | <<EOF>> /*unexpected_eof (token_start, "\"");*/ BEGIN context_state; |
| 406 | } |
| 407 | |
| 408 | |
| 409 | /*---------------------------------------------------. |
| 410 | | Strings, comments etc. can be found in user code. | |
| 411 | `---------------------------------------------------*/ |
| 412 | |
| 413 | <SC_BRACED_CODE,SC_PROLOGUE,SC_EPILOGUE> |
| 414 | { |
| 415 | "'" { |
| 416 | /* |
| 417 | STRING_GROW; |
| 418 | token_start = loc->start; |
| 419 | */ |
| 420 | context_state = YY_START; |
| 421 | BEGIN SC_CHARACTER; |
| 422 | } |
| 423 | "\"" { |
| 424 | /* |
| 425 | STRING_GROW; |
| 426 | token_start = loc->start; |
| 427 | */ |
| 428 | context_state = YY_START; |
| 429 | BEGIN SC_STRING; |
| 430 | } |
| 431 | "/"{splice}"*" { |
| 432 | /* |
| 433 | STRING_GROW; |
| 434 | token_start = loc->start; |
| 435 | */ |
| 436 | context_state = YY_START; |
| 437 | BEGIN SC_COMMENT; |
| 438 | } |
| 439 | "/"{splice}"/" { |
| 440 | /*STRING_GROW;*/ |
| 441 | context_state = YY_START; |
| 442 | BEGIN SC_LINE_COMMENT; |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | |
| 447 | /*---------------------------------------------------------------. |
| 448 | | Scanning after %union etc., possibly followed by white space. | |
| 449 | | For %union only, allow arbitrary C code to appear before the | |
| 450 | | following brace, as an extension to POSIX. | |
| 451 | `---------------------------------------------------------------*/ |
| 452 | |
| 453 | <SC_PRE_CODE> |
| 454 | { |
| 455 | . { |
| 456 | /* |
| 457 | bool valid = yytext[0] == '{' || token_type == PERCENT_UNION; |
| 458 | scanner_cursor.column -= mbsnwidth (yytext, yyleng, 0); |
| 459 | */ |
| 460 | bool valid=1; |
| 461 | yyless (0); |
| 462 | |
| 463 | if (valid) |
| 464 | { |
| 465 | braces_level = -1; |
| 466 | //code_start = loc->start; |
| 467 | BEGIN SC_BRACED_CODE; |
| 468 | } |
| 469 | else |
| 470 | { |
| 471 | /* |
| 472 | complain_at (*loc, _("missing `{' in `%s'"), |
| 473 | token_name (token_type)); |
| 474 | obstack_sgrow (&obstack_for_string, "{}"); |
| 475 | STRING_FINISH; |
| 476 | val->chars = last_string; |
| 477 | */ |
| 478 | BEGIN INITIAL; |
| 479 | return token_type; |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | <<EOF>> /*unexpected_eof (scanner_cursor, "{}");*/ BEGIN INITIAL; |
| 484 | } |
| 485 | |
| 486 | |
| 487 | /*---------------------------------------------------------------. |
| 488 | | Scanning some code in braces (%union and actions). The initial | |
| 489 | | "{" is already eaten. | |
| 490 | `---------------------------------------------------------------*/ |
| 491 | |
| 492 | <SC_BRACED_CODE> |
| 493 | { |
| 494 | "{"|"<"{splice}"%" /*STRING_GROW;*/ braces_level++; |
| 495 | "%"{splice}">" /*STRING_GROW;*/ braces_level--; |
| 496 | "}" { |
| 497 | bool outer_brace = --braces_level < 0; |
| 498 | |
| 499 | /* As an undocumented Bison extension, append `;' before the last |
| 500 | brace in braced code, so that the user code can omit trailing |
| 501 | `;'. But do not append `;' if emulating Yacc, since Yacc does |
| 502 | not append one. |
| 503 | |
| 504 | FIXME: Bison should warn if a semicolon seems to be necessary |
| 505 | here, and should omit the semicolon if it seems unnecessary |
| 506 | (e.g., after ';', '{', or '}', each followed by comments or |
| 507 | white space). Such a warning shouldn't depend on --yacc; it |
| 508 | should depend on a new --pedantic option, which would cause |
| 509 | Bison to warn if it detects an extension to POSIX. --pedantic |
| 510 | should also diagnose other Bison extensions like %yacc. |
| 511 | Perhaps there should also be a GCC-style --pedantic-errors |
| 512 | option, so that such warnings are diagnosed as errors. */ |
| 513 | |
| 514 | /* |
| 515 | if (outer_brace && token_type == BRACED_CODE && ! yacc_flag) |
| 516 | obstack_1grow (&obstack_for_string, ';'); |
| 517 | |
| 518 | obstack_1grow (&obstack_for_string, '}'); |
| 519 | */ |
| 520 | |
| 521 | if (outer_brace) |
| 522 | { |
| 523 | /* |
| 524 | STRING_FINISH; |
| 525 | rule_length++; |
| 526 | loc->start = code_start; |
| 527 | val->chars = last_string; |
| 528 | */ |
| 529 | BEGIN INITIAL; |
| 530 | return token_type; |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | /* Tokenize `<<%' correctly (as `<<' `%') rather than incorrrectly |
| 535 | (as `<' `<%'). */ |
| 536 | "<"{splice}"<" /*STRING_GROW;*/ |
| 537 | "$"("<"{tag}">")?(-?[0-9]+|"$") /*handle_dollar (token_type, yytext, *loc);*/ |
| 538 | "@"(-?[0-9]+|"$") /* handle_at (token_type, yytext, *loc);*/ |
| 539 | |
| 540 | <<EOF>> /*unexpected_eof (code_start, "}");*/ BEGIN INITIAL; |
| 541 | } |
| 542 | |
| 543 | |
| 544 | /*--------------------------------------------------------------. |
| 545 | | Scanning some prologue: from "%{" (already scanned) to "%}". | |
| 546 | `--------------------------------------------------------------*/ |
| 547 | |
| 548 | <SC_PROLOGUE> |
| 549 | { |
| 550 | "%}" { |
| 551 | /* |
| 552 | STRING_FINISH; |
| 553 | loc->start = code_start; |
| 554 | val->chars = last_string; |
| 555 | */ |
| 556 | BEGIN INITIAL; |
| 557 | return PROLOGUE; |
| 558 | } |
| 559 | |
| 560 | <<EOF>> /*unexpected_eof (code_start, "%}");*/ BEGIN INITIAL; |
| 561 | } |
| 562 | |
| 563 | |
| 564 | /*---------------------------------------------------------------. |
| 565 | | Scanning the epilogue (everything after the second "%%", which | |
| 566 | | has already been eaten). | |
| 567 | `---------------------------------------------------------------*/ |
| 568 | |
| 569 | <SC_EPILOGUE> |
| 570 | { |
| 571 | <<EOF>> { |
| 572 | /* |
| 573 | STRING_FINISH; |
| 574 | loc->start = code_start; |
| 575 | val->chars = last_string; |
| 576 | */ |
| 577 | BEGIN INITIAL; |
| 578 | return EPILOGUE; |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | |
| 583 | /*-----------------------------------------------------. |
| 584 | | By default, grow the string obstack with the input. | |
| 585 | `-----------------------------------------------------*/ |
| 586 | |
| 587 | <SC_COMMENT,SC_LINE_COMMENT,SC_BRACED_CODE,SC_PROLOGUE,SC_EPILOGUE,SC_STRING,SC_CHARACTER>. | |
| 588 | <SC_COMMENT,SC_LINE_COMMENT,SC_BRACED_CODE,SC_PROLOGUE,SC_EPILOGUE>\n /*STRING_GROW;*/ |
| 589 | |
| 590 | |
| 591 | %% |
| 592 | |
| 593 | /*------------------------------------------------------------------. |
| 594 | | Convert universal character name UCN to a single-byte character, | |
| 595 | | and return that character. Return -1 if UCN does not correspond | |
| 596 | | to a single-byte character. | |
| 597 | `------------------------------------------------------------------*/ |
| 598 | |
| 599 | static int |
| 600 | convert_ucn_to_byte (char const *ucn) |
| 601 | { |
| 602 | unsigned long int code = strtoul (ucn + 2, 0, 16); |
| 603 | |
| 604 | /* FIXME: Currently we assume Unicode-compatible unibyte characters |
| 605 | on ASCII hosts (i.e., Latin-1 on hosts with 8-bit bytes). On |
| 606 | non-ASCII hosts we support only the portable C character set. |
| 607 | These limitations should be removed once we add support for |
| 608 | multibyte characters. */ |
| 609 | |
| 610 | if (UCHAR_MAX < code) |
| 611 | return -1; |
| 612 | |
| 613 | #if ! ('$' == 0x24 && '@' == 0x40 && '`' == 0x60 && '~' == 0x7e) |
| 614 | { |
| 615 | /* A non-ASCII host. Use CODE to index into a table of the C |
| 616 | basic execution character set, which is guaranteed to exist on |
| 617 | all Standard C platforms. This table also includes '$', '@', |
| 618 | and '`', which are not in the basic execution character set but |
| 619 | which are unibyte characters on all the platforms that we know |
| 620 | about. */ |
| 621 | static signed char const table[] = |
| 622 | { |
| 623 | '\0', -1, -1, -1, -1, -1, -1, '\a', |
| 624 | '\b', '\t', '\n', '\v', '\f', '\r', -1, -1, |
| 625 | -1, -1, -1, -1, -1, -1, -1, -1, |
| 626 | -1, -1, -1, -1, -1, -1, -1, -1, |
| 627 | ' ', '!', '"', '#', '$', '%', '&', '\'', |
| 628 | '(', ')', '*', '+', ',', '-', '.', '/', |
| 629 | '0', '1', '2', '3', '4', '5', '6', '7', |
| 630 | '8', '9', ':', ';', '<', '=', '>', '?', |
| 631 | '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', |
| 632 | 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', |
| 633 | 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', |
| 634 | 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', |
| 635 | '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', |
| 636 | 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', |
| 637 | 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', |
| 638 | 'x', 'y', 'z', '{', '|', '}', '~' |
| 639 | }; |
| 640 | |
| 641 | code = code < sizeof table ? table[code] : -1; |
| 642 | } |
| 643 | #endif |
| 644 | |
| 645 | return code; |
| 646 | } |
| 647 | |