| 1 | /* FLEX lexer for Ada expressions, for GDB. |
| 2 | Copyright (C) 1994-2013 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | /*----------------------------------------------------------------------*/ |
| 20 | |
| 21 | /* The converted version of this file is to be included in ada-exp.y, */ |
| 22 | /* the Ada parser for gdb. The function yylex obtains characters from */ |
| 23 | /* the global pointer lexptr. It returns a syntactic category for */ |
| 24 | /* each successive token and places a semantic value into yylval */ |
| 25 | /* (ada-lval), defined by the parser. */ |
| 26 | |
| 27 | DIG [0-9] |
| 28 | NUM10 ({DIG}({DIG}|_)*) |
| 29 | HEXDIG [0-9a-f] |
| 30 | NUM16 ({HEXDIG}({HEXDIG}|_)*) |
| 31 | OCTDIG [0-7] |
| 32 | LETTER [a-z_] |
| 33 | ID ({LETTER}({LETTER}|{DIG})*|"<"{LETTER}({LETTER}|{DIG})*">") |
| 34 | WHITE [ \t\n] |
| 35 | TICK ("'"{WHITE}*) |
| 36 | GRAPHIC [a-z0-9 #&'()*+,-./:;<>=_|!$%?@\[\]\\^`{}~] |
| 37 | OPER ([-+*/=<>&]|"<="|">="|"**"|"/="|"and"|"or"|"xor"|"not"|"mod"|"rem"|"abs") |
| 38 | |
| 39 | EXP (e[+-]{NUM10}) |
| 40 | POSEXP (e"+"?{NUM10}) |
| 41 | |
| 42 | %{ |
| 43 | |
| 44 | #define NUMERAL_WIDTH 256 |
| 45 | #define LONGEST_SIGN ((ULONGEST) 1 << (sizeof(LONGEST) * HOST_CHAR_BIT - 1)) |
| 46 | |
| 47 | /* Temporary staging for numeric literals. */ |
| 48 | static char numbuf[NUMERAL_WIDTH]; |
| 49 | static void canonicalizeNumeral (char *s1, const char *); |
| 50 | static struct stoken processString (const char*, int); |
| 51 | static int processInt (const char *, const char *, const char *); |
| 52 | static int processReal (const char *); |
| 53 | static struct stoken processId (const char *, int); |
| 54 | static int processAttribute (const char *); |
| 55 | static int find_dot_all (const char *); |
| 56 | static void rewind_to_char (int); |
| 57 | |
| 58 | #undef YY_DECL |
| 59 | #define YY_DECL static int yylex ( void ) |
| 60 | |
| 61 | /* Flex generates a static function "input" which is not used. |
| 62 | Defining YY_NO_INPUT comments it out. */ |
| 63 | #define YY_NO_INPUT |
| 64 | |
| 65 | #undef YY_INPUT |
| 66 | #define YY_INPUT(BUF, RESULT, MAX_SIZE) \ |
| 67 | if ( *lexptr == '\000' ) \ |
| 68 | (RESULT) = YY_NULL; \ |
| 69 | else \ |
| 70 | { \ |
| 71 | *(BUF) = *lexptr; \ |
| 72 | (RESULT) = 1; \ |
| 73 | lexptr += 1; \ |
| 74 | } |
| 75 | |
| 76 | static int find_dot_all (const char *); |
| 77 | |
| 78 | %} |
| 79 | |
| 80 | %option case-insensitive interactive nodefault |
| 81 | |
| 82 | %s BEFORE_QUAL_QUOTE |
| 83 | |
| 84 | %% |
| 85 | |
| 86 | {WHITE} { } |
| 87 | |
| 88 | "--".* { yyterminate(); } |
| 89 | |
| 90 | {NUM10}{POSEXP} { |
| 91 | canonicalizeNumeral (numbuf, yytext); |
| 92 | return processInt (NULL, numbuf, strrchr(numbuf, 'e')+1); |
| 93 | } |
| 94 | |
| 95 | {NUM10} { |
| 96 | canonicalizeNumeral (numbuf, yytext); |
| 97 | return processInt (NULL, numbuf, NULL); |
| 98 | } |
| 99 | |
| 100 | {NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#"{POSEXP} { |
| 101 | canonicalizeNumeral (numbuf, yytext); |
| 102 | return processInt (numbuf, |
| 103 | strchr (numbuf, '#') + 1, |
| 104 | strrchr(numbuf, '#') + 1); |
| 105 | } |
| 106 | |
| 107 | {NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#" { |
| 108 | canonicalizeNumeral (numbuf, yytext); |
| 109 | return processInt (numbuf, strchr (numbuf, '#') + 1, NULL); |
| 110 | } |
| 111 | |
| 112 | "0x"{HEXDIG}+ { |
| 113 | canonicalizeNumeral (numbuf, yytext+2); |
| 114 | return processInt ("16#", numbuf, NULL); |
| 115 | } |
| 116 | |
| 117 | |
| 118 | {NUM10}"."{NUM10}{EXP} { |
| 119 | canonicalizeNumeral (numbuf, yytext); |
| 120 | return processReal (numbuf); |
| 121 | } |
| 122 | |
| 123 | {NUM10}"."{NUM10} { |
| 124 | canonicalizeNumeral (numbuf, yytext); |
| 125 | return processReal (numbuf); |
| 126 | } |
| 127 | |
| 128 | {NUM10}"#"{NUM16}"."{NUM16}"#"{EXP} { |
| 129 | error (_("Based real literals not implemented yet.")); |
| 130 | } |
| 131 | |
| 132 | {NUM10}"#"{NUM16}"."{NUM16}"#" { |
| 133 | error (_("Based real literals not implemented yet.")); |
| 134 | } |
| 135 | |
| 136 | <INITIAL>"'"({GRAPHIC}|\")"'" { |
| 137 | yylval.typed_val.type = type_char (); |
| 138 | yylval.typed_val.val = yytext[1]; |
| 139 | return CHARLIT; |
| 140 | } |
| 141 | |
| 142 | <INITIAL>"'[\""{HEXDIG}{2}"\"]'" { |
| 143 | int v; |
| 144 | yylval.typed_val.type = type_char (); |
| 145 | sscanf (yytext+3, "%2x", &v); |
| 146 | yylval.typed_val.val = v; |
| 147 | return CHARLIT; |
| 148 | } |
| 149 | |
| 150 | \"({GRAPHIC}|"[\""({HEXDIG}{2}|\")"\"]")*\" { |
| 151 | yylval.sval = processString (yytext+1, yyleng-2); |
| 152 | return STRING; |
| 153 | } |
| 154 | |
| 155 | \" { |
| 156 | error (_("ill-formed or non-terminated string literal")); |
| 157 | } |
| 158 | |
| 159 | |
| 160 | if { |
| 161 | rewind_to_char ('i'); |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | task { |
| 166 | rewind_to_char ('t'); |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | thread{WHITE}+{DIG} { |
| 171 | /* This keyword signals the end of the expression and |
| 172 | will be processed separately. */ |
| 173 | rewind_to_char ('t'); |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | /* ADA KEYWORDS */ |
| 178 | |
| 179 | abs { return ABS; } |
| 180 | and { return _AND_; } |
| 181 | else { return ELSE; } |
| 182 | in { return IN; } |
| 183 | mod { return MOD; } |
| 184 | new { return NEW; } |
| 185 | not { return NOT; } |
| 186 | null { return NULL_PTR; } |
| 187 | or { return OR; } |
| 188 | others { return OTHERS; } |
| 189 | rem { return REM; } |
| 190 | then { return THEN; } |
| 191 | xor { return XOR; } |
| 192 | |
| 193 | /* BOOLEAN "KEYWORDS" */ |
| 194 | |
| 195 | /* True and False are not keywords in Ada, but rather enumeration constants. |
| 196 | However, the boolean type is no longer represented as an enum, so True |
| 197 | and False are no longer defined in symbol tables. We compromise by |
| 198 | making them keywords (when bare). */ |
| 199 | |
| 200 | true { return TRUEKEYWORD; } |
| 201 | false { return FALSEKEYWORD; } |
| 202 | |
| 203 | /* ATTRIBUTES */ |
| 204 | |
| 205 | {TICK}[a-zA-Z][a-zA-Z]+ { return processAttribute (yytext+1); } |
| 206 | |
| 207 | /* PUNCTUATION */ |
| 208 | |
| 209 | "=>" { return ARROW; } |
| 210 | ".." { return DOTDOT; } |
| 211 | "**" { return STARSTAR; } |
| 212 | ":=" { return ASSIGN; } |
| 213 | "/=" { return NOTEQUAL; } |
| 214 | "<=" { return LEQ; } |
| 215 | ">=" { return GEQ; } |
| 216 | |
| 217 | <BEFORE_QUAL_QUOTE>"'" { BEGIN INITIAL; return '\''; } |
| 218 | |
| 219 | [-&*+./:<>=|;\[\]] { return yytext[0]; } |
| 220 | |
| 221 | "," { if (paren_depth == 0 && comma_terminates) |
| 222 | { |
| 223 | rewind_to_char (','); |
| 224 | return 0; |
| 225 | } |
| 226 | else |
| 227 | return ','; |
| 228 | } |
| 229 | |
| 230 | "(" { paren_depth += 1; return '('; } |
| 231 | ")" { if (paren_depth == 0) |
| 232 | { |
| 233 | rewind_to_char (')'); |
| 234 | return 0; |
| 235 | } |
| 236 | else |
| 237 | { |
| 238 | paren_depth -= 1; |
| 239 | return ')'; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | "."{WHITE}*all { return DOT_ALL; } |
| 244 | |
| 245 | "."{WHITE}*{ID} { |
| 246 | yylval.sval = processId (yytext+1, yyleng-1); |
| 247 | return DOT_ID; |
| 248 | } |
| 249 | |
| 250 | {ID}({WHITE}*"."{WHITE}*({ID}|\"{OPER}\"))*(" "*"'")? { |
| 251 | int all_posn = find_dot_all (yytext); |
| 252 | |
| 253 | if (all_posn == -1 && yytext[yyleng-1] == '\'') |
| 254 | { |
| 255 | BEGIN BEFORE_QUAL_QUOTE; |
| 256 | yyless (yyleng-1); |
| 257 | } |
| 258 | else if (all_posn >= 0) |
| 259 | yyless (all_posn); |
| 260 | yylval.sval = processId (yytext, yyleng); |
| 261 | return NAME; |
| 262 | } |
| 263 | |
| 264 | |
| 265 | /* GDB EXPRESSION CONSTRUCTS */ |
| 266 | |
| 267 | "'"[^']+"'"{WHITE}*:: { |
| 268 | yyless (yyleng - 2); |
| 269 | yylval.sval = processId (yytext, yyleng); |
| 270 | return NAME; |
| 271 | } |
| 272 | |
| 273 | "::" { return COLONCOLON; } |
| 274 | |
| 275 | [{}@] { return yytext[0]; } |
| 276 | |
| 277 | /* REGISTERS AND GDB CONVENIENCE VARIABLES */ |
| 278 | |
| 279 | "$"({LETTER}|{DIG}|"$")* { |
| 280 | yylval.sval.ptr = yytext; |
| 281 | yylval.sval.length = yyleng; |
| 282 | return SPECIAL_VARIABLE; |
| 283 | } |
| 284 | |
| 285 | /* CATCH-ALL ERROR CASE */ |
| 286 | |
| 287 | . { error (_("Invalid character '%s' in expression."), yytext); } |
| 288 | %% |
| 289 | |
| 290 | #include <ctype.h> |
| 291 | #include <string.h> |
| 292 | |
| 293 | /* Initialize the lexer for processing new expression. */ |
| 294 | |
| 295 | static void |
| 296 | lexer_init (FILE *inp) |
| 297 | { |
| 298 | BEGIN INITIAL; |
| 299 | yyrestart (inp); |
| 300 | } |
| 301 | |
| 302 | |
| 303 | /* Copy S2 to S1, removing all underscores, and downcasing all letters. */ |
| 304 | |
| 305 | static void |
| 306 | canonicalizeNumeral (char *s1, const char *s2) |
| 307 | { |
| 308 | for (; *s2 != '\000'; s2 += 1) |
| 309 | { |
| 310 | if (*s2 != '_') |
| 311 | { |
| 312 | *s1 = tolower(*s2); |
| 313 | s1 += 1; |
| 314 | } |
| 315 | } |
| 316 | s1[0] = '\000'; |
| 317 | } |
| 318 | |
| 319 | /* Interprets the prefix of NUM that consists of digits of the given BASE |
| 320 | as an integer of that BASE, with the string EXP as an exponent. |
| 321 | Puts value in yylval, and returns INT, if the string is valid. Causes |
| 322 | an error if the number is improperly formated. BASE, if NULL, defaults |
| 323 | to "10", and EXP to "1". The EXP does not contain a leading 'e' or 'E'. |
| 324 | */ |
| 325 | |
| 326 | static int |
| 327 | processInt (const char *base0, const char *num0, const char *exp0) |
| 328 | { |
| 329 | ULONGEST result; |
| 330 | long exp; |
| 331 | int base; |
| 332 | const char *trailer; |
| 333 | |
| 334 | if (base0 == NULL) |
| 335 | base = 10; |
| 336 | else |
| 337 | { |
| 338 | base = strtol (base0, (char **) NULL, 10); |
| 339 | if (base < 2 || base > 16) |
| 340 | error (_("Invalid base: %d."), base); |
| 341 | } |
| 342 | |
| 343 | if (exp0 == NULL) |
| 344 | exp = 0; |
| 345 | else |
| 346 | exp = strtol(exp0, (char **) NULL, 10); |
| 347 | |
| 348 | errno = 0; |
| 349 | result = strtoulst (num0, &trailer, base); |
| 350 | if (errno == ERANGE) |
| 351 | error (_("Integer literal out of range")); |
| 352 | if (isxdigit(*trailer)) |
| 353 | error (_("Invalid digit `%c' in based literal"), *trailer); |
| 354 | |
| 355 | while (exp > 0) |
| 356 | { |
| 357 | if (result > (ULONG_MAX / base)) |
| 358 | error (_("Integer literal out of range")); |
| 359 | result *= base; |
| 360 | exp -= 1; |
| 361 | } |
| 362 | |
| 363 | if ((result >> (gdbarch_int_bit (parse_gdbarch)-1)) == 0) |
| 364 | yylval.typed_val.type = type_int (); |
| 365 | else if ((result >> (gdbarch_long_bit (parse_gdbarch)-1)) == 0) |
| 366 | yylval.typed_val.type = type_long (); |
| 367 | else if (((result >> (gdbarch_long_bit (parse_gdbarch)-1)) >> 1) == 0) |
| 368 | { |
| 369 | /* We have a number representable as an unsigned integer quantity. |
| 370 | For consistency with the C treatment, we will treat it as an |
| 371 | anonymous modular (unsigned) quantity. Alas, the types are such |
| 372 | that we need to store .val as a signed quantity. Sorry |
| 373 | for the mess, but C doesn't officially guarantee that a simple |
| 374 | assignment does the trick (no, it doesn't; read the reference manual). |
| 375 | */ |
| 376 | yylval.typed_val.type |
| 377 | = builtin_type (parse_gdbarch)->builtin_unsigned_long; |
| 378 | if (result & LONGEST_SIGN) |
| 379 | yylval.typed_val.val = |
| 380 | (LONGEST) (result & ~LONGEST_SIGN) |
| 381 | - (LONGEST_SIGN>>1) - (LONGEST_SIGN>>1); |
| 382 | else |
| 383 | yylval.typed_val.val = (LONGEST) result; |
| 384 | return INT; |
| 385 | } |
| 386 | else |
| 387 | yylval.typed_val.type = type_long_long (); |
| 388 | |
| 389 | yylval.typed_val.val = (LONGEST) result; |
| 390 | return INT; |
| 391 | } |
| 392 | |
| 393 | static int |
| 394 | processReal (const char *num0) |
| 395 | { |
| 396 | sscanf (num0, "%" DOUBLEST_SCAN_FORMAT, &yylval.typed_val_float.dval); |
| 397 | |
| 398 | yylval.typed_val_float.type = type_float (); |
| 399 | if (sizeof(DOUBLEST) >= gdbarch_double_bit (parse_gdbarch) |
| 400 | / TARGET_CHAR_BIT) |
| 401 | yylval.typed_val_float.type = type_double (); |
| 402 | if (sizeof(DOUBLEST) >= gdbarch_long_double_bit (parse_gdbarch) |
| 403 | / TARGET_CHAR_BIT) |
| 404 | yylval.typed_val_float.type = type_long_double (); |
| 405 | |
| 406 | return FLOAT; |
| 407 | } |
| 408 | |
| 409 | |
| 410 | /* Store a canonicalized version of NAME0[0..LEN-1] in yylval.ssym. The |
| 411 | resulting string is valid until the next call to ada_parse. If |
| 412 | NAME0 contains the substring "___", it is assumed to be already |
| 413 | encoded and the resulting name is equal to it. Otherwise, it differs |
| 414 | from NAME0 in that: |
| 415 | + Characters between '...' or <...> are transfered verbatim to |
| 416 | yylval.ssym. |
| 417 | + <, >, and trailing "'" characters in quoted sequences are removed |
| 418 | (a leading quote is preserved to indicate that the name is not to be |
| 419 | GNAT-encoded). |
| 420 | + Unquoted whitespace is removed. |
| 421 | + Unquoted alphabetic characters are mapped to lower case. |
| 422 | Result is returned as a struct stoken, but for convenience, the string |
| 423 | is also null-terminated. Result string valid until the next call of |
| 424 | ada_parse. |
| 425 | */ |
| 426 | static struct stoken |
| 427 | processId (const char *name0, int len) |
| 428 | { |
| 429 | char *name = obstack_alloc (&temp_parse_space, len + 11); |
| 430 | int i0, i; |
| 431 | struct stoken result; |
| 432 | |
| 433 | result.ptr = name; |
| 434 | while (len > 0 && isspace (name0[len-1])) |
| 435 | len -= 1; |
| 436 | |
| 437 | if (strstr (name0, "___") != NULL) |
| 438 | { |
| 439 | strncpy (name, name0, len); |
| 440 | name[len] = '\000'; |
| 441 | result.length = len; |
| 442 | return result; |
| 443 | } |
| 444 | |
| 445 | i = i0 = 0; |
| 446 | while (i0 < len) |
| 447 | { |
| 448 | if (isalnum (name0[i0])) |
| 449 | { |
| 450 | name[i] = tolower (name0[i0]); |
| 451 | i += 1; i0 += 1; |
| 452 | } |
| 453 | else switch (name0[i0]) |
| 454 | { |
| 455 | default: |
| 456 | name[i] = name0[i0]; |
| 457 | i += 1; i0 += 1; |
| 458 | break; |
| 459 | case ' ': case '\t': |
| 460 | i0 += 1; |
| 461 | break; |
| 462 | case '\'': |
| 463 | do |
| 464 | { |
| 465 | name[i] = name0[i0]; |
| 466 | i += 1; i0 += 1; |
| 467 | } |
| 468 | while (i0 < len && name0[i0] != '\''); |
| 469 | i0 += 1; |
| 470 | break; |
| 471 | case '<': |
| 472 | i0 += 1; |
| 473 | while (i0 < len && name0[i0] != '>') |
| 474 | { |
| 475 | name[i] = name0[i0]; |
| 476 | i += 1; i0 += 1; |
| 477 | } |
| 478 | i0 += 1; |
| 479 | break; |
| 480 | } |
| 481 | } |
| 482 | name[i] = '\000'; |
| 483 | |
| 484 | result.length = i; |
| 485 | return result; |
| 486 | } |
| 487 | |
| 488 | /* Return TEXT[0..LEN-1], a string literal without surrounding quotes, |
| 489 | with special hex character notations replaced with characters. |
| 490 | Result valid until the next call to ada_parse. */ |
| 491 | |
| 492 | static struct stoken |
| 493 | processString (const char *text, int len) |
| 494 | { |
| 495 | const char *p; |
| 496 | char *q; |
| 497 | const char *lim = text + len; |
| 498 | struct stoken result; |
| 499 | |
| 500 | q = obstack_alloc (&temp_parse_space, len); |
| 501 | result.ptr = q; |
| 502 | p = text; |
| 503 | while (p < lim) |
| 504 | { |
| 505 | if (p[0] == '[' && p[1] == '"' && p+2 < lim) |
| 506 | { |
| 507 | if (p[2] == '"') /* "...["""]... */ |
| 508 | { |
| 509 | *q = '"'; |
| 510 | p += 4; |
| 511 | } |
| 512 | else |
| 513 | { |
| 514 | int chr; |
| 515 | sscanf (p+2, "%2x", &chr); |
| 516 | *q = (char) chr; |
| 517 | p += 5; |
| 518 | } |
| 519 | } |
| 520 | else |
| 521 | *q = *p; |
| 522 | q += 1; |
| 523 | p += 1; |
| 524 | } |
| 525 | result.length = q - result.ptr; |
| 526 | return result; |
| 527 | } |
| 528 | |
| 529 | /* Returns the position within STR of the '.' in a |
| 530 | '.{WHITE}*all' component of a dotted name, or -1 if there is none. |
| 531 | Note: we actually don't need this routine, since 'all' can never be an |
| 532 | Ada identifier. Thus, looking up foo.all or foo.all.x as a name |
| 533 | must fail, and will eventually be interpreted as (foo).all or |
| 534 | (foo).all.x. However, this does avoid an extraneous lookup. */ |
| 535 | |
| 536 | static int |
| 537 | find_dot_all (const char *str) |
| 538 | { |
| 539 | int i; |
| 540 | for (i = 0; str[i] != '\000'; i += 1) |
| 541 | { |
| 542 | if (str[i] == '.') |
| 543 | { |
| 544 | int i0 = i; |
| 545 | do |
| 546 | i += 1; |
| 547 | while (isspace (str[i])); |
| 548 | if (strncasecmp (str+i, "all", 3) == 0 |
| 549 | && ! isalnum (str[i+3]) && str[i+3] != '_') |
| 550 | return i0; |
| 551 | } |
| 552 | } |
| 553 | return -1; |
| 554 | } |
| 555 | |
| 556 | /* Returns non-zero iff string SUBSEQ matches a subsequence of STR, ignoring |
| 557 | case. */ |
| 558 | |
| 559 | static int |
| 560 | subseqMatch (const char *subseq, const char *str) |
| 561 | { |
| 562 | if (subseq[0] == '\0') |
| 563 | return 1; |
| 564 | else if (str[0] == '\0') |
| 565 | return 0; |
| 566 | else if (tolower (subseq[0]) == tolower (str[0])) |
| 567 | return subseqMatch (subseq+1, str+1) || subseqMatch (subseq, str+1); |
| 568 | else |
| 569 | return subseqMatch (subseq, str+1); |
| 570 | } |
| 571 | |
| 572 | |
| 573 | static struct { const char *name; int code; } |
| 574 | attributes[] = { |
| 575 | { "address", TICK_ADDRESS }, |
| 576 | { "unchecked_access", TICK_ACCESS }, |
| 577 | { "unrestricted_access", TICK_ACCESS }, |
| 578 | { "access", TICK_ACCESS }, |
| 579 | { "first", TICK_FIRST }, |
| 580 | { "last", TICK_LAST }, |
| 581 | { "length", TICK_LENGTH }, |
| 582 | { "max", TICK_MAX }, |
| 583 | { "min", TICK_MIN }, |
| 584 | { "modulus", TICK_MODULUS }, |
| 585 | { "pos", TICK_POS }, |
| 586 | { "range", TICK_RANGE }, |
| 587 | { "size", TICK_SIZE }, |
| 588 | { "tag", TICK_TAG }, |
| 589 | { "val", TICK_VAL }, |
| 590 | { NULL, -1 } |
| 591 | }; |
| 592 | |
| 593 | /* Return the syntactic code corresponding to the attribute name or |
| 594 | abbreviation STR. */ |
| 595 | |
| 596 | static int |
| 597 | processAttribute (const char *str) |
| 598 | { |
| 599 | int i, k; |
| 600 | |
| 601 | for (i = 0; attributes[i].code != -1; i += 1) |
| 602 | if (strcasecmp (str, attributes[i].name) == 0) |
| 603 | return attributes[i].code; |
| 604 | |
| 605 | for (i = 0, k = -1; attributes[i].code != -1; i += 1) |
| 606 | if (subseqMatch (str, attributes[i].name)) |
| 607 | { |
| 608 | if (k == -1) |
| 609 | k = i; |
| 610 | else |
| 611 | error (_("ambiguous attribute name: `%s'"), str); |
| 612 | } |
| 613 | if (k == -1) |
| 614 | error (_("unrecognized attribute: `%s'"), str); |
| 615 | |
| 616 | return attributes[k].code; |
| 617 | } |
| 618 | |
| 619 | /* Back up lexptr by yyleng and then to the rightmost occurrence of |
| 620 | character CH, case-folded (there must be one). WARNING: since |
| 621 | lexptr points to the next input character that Flex has not yet |
| 622 | transferred to its internal buffer, the use of this function |
| 623 | depends on the assumption that Flex calls YY_INPUT only when it is |
| 624 | logically necessary to do so (thus, there is no reading ahead |
| 625 | farther than needed to identify the next token.) */ |
| 626 | |
| 627 | static void |
| 628 | rewind_to_char (int ch) |
| 629 | { |
| 630 | lexptr -= yyleng; |
| 631 | while (toupper (*lexptr) != toupper (ch)) |
| 632 | lexptr -= 1; |
| 633 | yyrestart (NULL); |
| 634 | } |
| 635 | |
| 636 | int |
| 637 | yywrap(void) |
| 638 | { |
| 639 | return 1; |
| 640 | } |
| 641 | |
| 642 | /* Dummy definition to suppress warnings about unused static definitions. */ |
| 643 | typedef void (*dummy_function) (); |
| 644 | dummy_function ada_flex_use[] = |
| 645 | { |
| 646 | (dummy_function) yyunput |
| 647 | }; |