| 1 | /* FLEX lexer for Ada expressions, for GDB. |
| 2 | Copyright (C) 1994-2015 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 (struct parser_state *, const char *, const char *, |
| 52 | const char *); |
| 53 | static int processReal (struct parser_state *, const char *); |
| 54 | static struct stoken processId (const char *, int); |
| 55 | static int processAttribute (const char *); |
| 56 | static int find_dot_all (const char *); |
| 57 | static void rewind_to_char (int); |
| 58 | |
| 59 | #undef YY_DECL |
| 60 | #define YY_DECL static int yylex ( void ) |
| 61 | |
| 62 | /* Flex generates a static function "input" which is not used. |
| 63 | Defining YY_NO_INPUT comments it out. */ |
| 64 | #define YY_NO_INPUT |
| 65 | |
| 66 | #undef YY_INPUT |
| 67 | #define YY_INPUT(BUF, RESULT, MAX_SIZE) \ |
| 68 | if ( *lexptr == '\000' ) \ |
| 69 | (RESULT) = YY_NULL; \ |
| 70 | else \ |
| 71 | { \ |
| 72 | *(BUF) = *lexptr; \ |
| 73 | (RESULT) = 1; \ |
| 74 | lexptr += 1; \ |
| 75 | } |
| 76 | |
| 77 | static int find_dot_all (const char *); |
| 78 | |
| 79 | %} |
| 80 | |
| 81 | %option case-insensitive interactive nodefault |
| 82 | |
| 83 | %s BEFORE_QUAL_QUOTE |
| 84 | |
| 85 | %% |
| 86 | |
| 87 | {WHITE} { } |
| 88 | |
| 89 | "--".* { yyterminate(); } |
| 90 | |
| 91 | {NUM10}{POSEXP} { |
| 92 | canonicalizeNumeral (numbuf, yytext); |
| 93 | return processInt (pstate, NULL, numbuf, |
| 94 | strrchr (numbuf, 'e') + 1); |
| 95 | } |
| 96 | |
| 97 | {NUM10} { |
| 98 | canonicalizeNumeral (numbuf, yytext); |
| 99 | return processInt (pstate, NULL, numbuf, NULL); |
| 100 | } |
| 101 | |
| 102 | {NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#"{POSEXP} { |
| 103 | canonicalizeNumeral (numbuf, yytext); |
| 104 | return processInt (pstate, numbuf, |
| 105 | strchr (numbuf, '#') + 1, |
| 106 | strrchr(numbuf, '#') + 1); |
| 107 | } |
| 108 | |
| 109 | {NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#" { |
| 110 | canonicalizeNumeral (numbuf, yytext); |
| 111 | return processInt (pstate, numbuf, strchr (numbuf, '#') + 1, |
| 112 | NULL); |
| 113 | } |
| 114 | |
| 115 | "0x"{HEXDIG}+ { |
| 116 | canonicalizeNumeral (numbuf, yytext+2); |
| 117 | return processInt (pstate, "16#", numbuf, NULL); |
| 118 | } |
| 119 | |
| 120 | |
| 121 | {NUM10}"."{NUM10}{EXP} { |
| 122 | canonicalizeNumeral (numbuf, yytext); |
| 123 | return processReal (pstate, numbuf); |
| 124 | } |
| 125 | |
| 126 | {NUM10}"."{NUM10} { |
| 127 | canonicalizeNumeral (numbuf, yytext); |
| 128 | return processReal (pstate, numbuf); |
| 129 | } |
| 130 | |
| 131 | {NUM10}"#"{NUM16}"."{NUM16}"#"{EXP} { |
| 132 | error (_("Based real literals not implemented yet.")); |
| 133 | } |
| 134 | |
| 135 | {NUM10}"#"{NUM16}"."{NUM16}"#" { |
| 136 | error (_("Based real literals not implemented yet.")); |
| 137 | } |
| 138 | |
| 139 | <INITIAL>"'"({GRAPHIC}|\")"'" { |
| 140 | yylval.typed_val.type = type_char (pstate); |
| 141 | yylval.typed_val.val = yytext[1]; |
| 142 | return CHARLIT; |
| 143 | } |
| 144 | |
| 145 | <INITIAL>"'[\""{HEXDIG}{2}"\"]'" { |
| 146 | int v; |
| 147 | yylval.typed_val.type = type_char (pstate); |
| 148 | sscanf (yytext+3, "%2x", &v); |
| 149 | yylval.typed_val.val = v; |
| 150 | return CHARLIT; |
| 151 | } |
| 152 | |
| 153 | \"({GRAPHIC}|"[\""({HEXDIG}{2}|\")"\"]")*\" { |
| 154 | yylval.sval = processString (yytext+1, yyleng-2); |
| 155 | return STRING; |
| 156 | } |
| 157 | |
| 158 | \" { |
| 159 | error (_("ill-formed or non-terminated string literal")); |
| 160 | } |
| 161 | |
| 162 | |
| 163 | if { |
| 164 | rewind_to_char ('i'); |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | task { |
| 169 | rewind_to_char ('t'); |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | thread{WHITE}+{DIG} { |
| 174 | /* This keyword signals the end of the expression and |
| 175 | will be processed separately. */ |
| 176 | rewind_to_char ('t'); |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /* ADA KEYWORDS */ |
| 181 | |
| 182 | abs { return ABS; } |
| 183 | and { return _AND_; } |
| 184 | else { return ELSE; } |
| 185 | in { return IN; } |
| 186 | mod { return MOD; } |
| 187 | new { return NEW; } |
| 188 | not { return NOT; } |
| 189 | null { return NULL_PTR; } |
| 190 | or { return OR; } |
| 191 | others { return OTHERS; } |
| 192 | rem { return REM; } |
| 193 | then { return THEN; } |
| 194 | xor { return XOR; } |
| 195 | |
| 196 | /* BOOLEAN "KEYWORDS" */ |
| 197 | |
| 198 | /* True and False are not keywords in Ada, but rather enumeration constants. |
| 199 | However, the boolean type is no longer represented as an enum, so True |
| 200 | and False are no longer defined in symbol tables. We compromise by |
| 201 | making them keywords (when bare). */ |
| 202 | |
| 203 | true { return TRUEKEYWORD; } |
| 204 | false { return FALSEKEYWORD; } |
| 205 | |
| 206 | /* ATTRIBUTES */ |
| 207 | |
| 208 | {TICK}[a-zA-Z][a-zA-Z]+ { BEGIN INITIAL; return processAttribute (yytext+1); } |
| 209 | |
| 210 | /* PUNCTUATION */ |
| 211 | |
| 212 | "=>" { return ARROW; } |
| 213 | ".." { return DOTDOT; } |
| 214 | "**" { return STARSTAR; } |
| 215 | ":=" { return ASSIGN; } |
| 216 | "/=" { return NOTEQUAL; } |
| 217 | "<=" { return LEQ; } |
| 218 | ">=" { return GEQ; } |
| 219 | |
| 220 | <BEFORE_QUAL_QUOTE>"'" { BEGIN INITIAL; return '\''; } |
| 221 | |
| 222 | [-&*+./:<>=|;\[\]] { return yytext[0]; } |
| 223 | |
| 224 | "," { if (paren_depth == 0 && comma_terminates) |
| 225 | { |
| 226 | rewind_to_char (','); |
| 227 | return 0; |
| 228 | } |
| 229 | else |
| 230 | return ','; |
| 231 | } |
| 232 | |
| 233 | "(" { paren_depth += 1; return '('; } |
| 234 | ")" { if (paren_depth == 0) |
| 235 | { |
| 236 | rewind_to_char (')'); |
| 237 | return 0; |
| 238 | } |
| 239 | else |
| 240 | { |
| 241 | paren_depth -= 1; |
| 242 | return ')'; |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | "."{WHITE}*all { return DOT_ALL; } |
| 247 | |
| 248 | "."{WHITE}*{ID} { |
| 249 | yylval.sval = processId (yytext+1, yyleng-1); |
| 250 | return DOT_ID; |
| 251 | } |
| 252 | |
| 253 | {ID}({WHITE}*"."{WHITE}*({ID}|\"{OPER}\"))*(" "*"'")? { |
| 254 | int all_posn = find_dot_all (yytext); |
| 255 | |
| 256 | if (all_posn == -1 && yytext[yyleng-1] == '\'') |
| 257 | { |
| 258 | BEGIN BEFORE_QUAL_QUOTE; |
| 259 | yyless (yyleng-1); |
| 260 | } |
| 261 | else if (all_posn >= 0) |
| 262 | yyless (all_posn); |
| 263 | yylval.sval = processId (yytext, yyleng); |
| 264 | return NAME; |
| 265 | } |
| 266 | |
| 267 | |
| 268 | /* GDB EXPRESSION CONSTRUCTS */ |
| 269 | |
| 270 | "'"[^']+"'"{WHITE}*:: { |
| 271 | yyless (yyleng - 2); |
| 272 | yylval.sval = processId (yytext, yyleng); |
| 273 | return NAME; |
| 274 | } |
| 275 | |
| 276 | "::" { return COLONCOLON; } |
| 277 | |
| 278 | [{}@] { return yytext[0]; } |
| 279 | |
| 280 | /* REGISTERS AND GDB CONVENIENCE VARIABLES */ |
| 281 | |
| 282 | "$"({LETTER}|{DIG}|"$")* { |
| 283 | yylval.sval.ptr = yytext; |
| 284 | yylval.sval.length = yyleng; |
| 285 | return SPECIAL_VARIABLE; |
| 286 | } |
| 287 | |
| 288 | /* CATCH-ALL ERROR CASE */ |
| 289 | |
| 290 | . { error (_("Invalid character '%s' in expression."), yytext); } |
| 291 | %% |
| 292 | |
| 293 | #include <ctype.h> |
| 294 | /* Initialize the lexer for processing new expression. */ |
| 295 | |
| 296 | static void |
| 297 | lexer_init (FILE *inp) |
| 298 | { |
| 299 | BEGIN INITIAL; |
| 300 | yyrestart (inp); |
| 301 | } |
| 302 | |
| 303 | |
| 304 | /* Copy S2 to S1, removing all underscores, and downcasing all letters. */ |
| 305 | |
| 306 | static void |
| 307 | canonicalizeNumeral (char *s1, const char *s2) |
| 308 | { |
| 309 | for (; *s2 != '\000'; s2 += 1) |
| 310 | { |
| 311 | if (*s2 != '_') |
| 312 | { |
| 313 | *s1 = tolower(*s2); |
| 314 | s1 += 1; |
| 315 | } |
| 316 | } |
| 317 | s1[0] = '\000'; |
| 318 | } |
| 319 | |
| 320 | /* Interprets the prefix of NUM that consists of digits of the given BASE |
| 321 | as an integer of that BASE, with the string EXP as an exponent. |
| 322 | Puts value in yylval, and returns INT, if the string is valid. Causes |
| 323 | an error if the number is improperly formated. BASE, if NULL, defaults |
| 324 | to "10", and EXP to "1". The EXP does not contain a leading 'e' or 'E'. |
| 325 | */ |
| 326 | |
| 327 | static int |
| 328 | processInt (struct parser_state *par_state, const char *base0, |
| 329 | const char *num0, const char *exp0) |
| 330 | { |
| 331 | ULONGEST result; |
| 332 | long exp; |
| 333 | int base; |
| 334 | const char *trailer; |
| 335 | |
| 336 | if (base0 == NULL) |
| 337 | base = 10; |
| 338 | else |
| 339 | { |
| 340 | base = strtol (base0, (char **) NULL, 10); |
| 341 | if (base < 2 || base > 16) |
| 342 | error (_("Invalid base: %d."), base); |
| 343 | } |
| 344 | |
| 345 | if (exp0 == NULL) |
| 346 | exp = 0; |
| 347 | else |
| 348 | exp = strtol(exp0, (char **) NULL, 10); |
| 349 | |
| 350 | errno = 0; |
| 351 | result = strtoulst (num0, &trailer, base); |
| 352 | if (errno == ERANGE) |
| 353 | error (_("Integer literal out of range")); |
| 354 | if (isxdigit(*trailer)) |
| 355 | error (_("Invalid digit `%c' in based literal"), *trailer); |
| 356 | |
| 357 | while (exp > 0) |
| 358 | { |
| 359 | if (result > (ULONG_MAX / base)) |
| 360 | error (_("Integer literal out of range")); |
| 361 | result *= base; |
| 362 | exp -= 1; |
| 363 | } |
| 364 | |
| 365 | if ((result >> (gdbarch_int_bit (parse_gdbarch (par_state))-1)) == 0) |
| 366 | yylval.typed_val.type = type_int (par_state); |
| 367 | else if ((result >> (gdbarch_long_bit (parse_gdbarch (par_state))-1)) == 0) |
| 368 | yylval.typed_val.type = type_long (par_state); |
| 369 | else if (((result >> (gdbarch_long_bit (parse_gdbarch (par_state))-1)) >> 1) == 0) |
| 370 | { |
| 371 | /* We have a number representable as an unsigned integer quantity. |
| 372 | For consistency with the C treatment, we will treat it as an |
| 373 | anonymous modular (unsigned) quantity. Alas, the types are such |
| 374 | that we need to store .val as a signed quantity. Sorry |
| 375 | for the mess, but C doesn't officially guarantee that a simple |
| 376 | assignment does the trick (no, it doesn't; read the reference manual). |
| 377 | */ |
| 378 | yylval.typed_val.type |
| 379 | = builtin_type (parse_gdbarch (par_state))->builtin_unsigned_long; |
| 380 | if (result & LONGEST_SIGN) |
| 381 | yylval.typed_val.val = |
| 382 | (LONGEST) (result & ~LONGEST_SIGN) |
| 383 | - (LONGEST_SIGN>>1) - (LONGEST_SIGN>>1); |
| 384 | else |
| 385 | yylval.typed_val.val = (LONGEST) result; |
| 386 | return INT; |
| 387 | } |
| 388 | else |
| 389 | yylval.typed_val.type = type_long_long (par_state); |
| 390 | |
| 391 | yylval.typed_val.val = (LONGEST) result; |
| 392 | return INT; |
| 393 | } |
| 394 | |
| 395 | static int |
| 396 | processReal (struct parser_state *par_state, const char *num0) |
| 397 | { |
| 398 | sscanf (num0, "%" DOUBLEST_SCAN_FORMAT, &yylval.typed_val_float.dval); |
| 399 | |
| 400 | yylval.typed_val_float.type = type_float (par_state); |
| 401 | if (sizeof(DOUBLEST) >= gdbarch_double_bit (parse_gdbarch (par_state)) |
| 402 | / TARGET_CHAR_BIT) |
| 403 | yylval.typed_val_float.type = type_double (par_state); |
| 404 | if (sizeof(DOUBLEST) >= gdbarch_long_double_bit (parse_gdbarch (par_state)) |
| 405 | / TARGET_CHAR_BIT) |
| 406 | yylval.typed_val_float.type = type_long_double (par_state); |
| 407 | |
| 408 | return FLOAT; |
| 409 | } |
| 410 | |
| 411 | |
| 412 | /* Store a canonicalized version of NAME0[0..LEN-1] in yylval.ssym. The |
| 413 | resulting string is valid until the next call to ada_parse. If |
| 414 | NAME0 contains the substring "___", it is assumed to be already |
| 415 | encoded and the resulting name is equal to it. Otherwise, it differs |
| 416 | from NAME0 in that: |
| 417 | + Characters between '...' or <...> are transfered verbatim to |
| 418 | yylval.ssym. |
| 419 | + <, >, and trailing "'" characters in quoted sequences are removed |
| 420 | (a leading quote is preserved to indicate that the name is not to be |
| 421 | GNAT-encoded). |
| 422 | + Unquoted whitespace is removed. |
| 423 | + Unquoted alphabetic characters are mapped to lower case. |
| 424 | Result is returned as a struct stoken, but for convenience, the string |
| 425 | is also null-terminated. Result string valid until the next call of |
| 426 | ada_parse. |
| 427 | */ |
| 428 | static struct stoken |
| 429 | processId (const char *name0, int len) |
| 430 | { |
| 431 | char *name = (char *) obstack_alloc (&temp_parse_space, len + 11); |
| 432 | int i0, i; |
| 433 | struct stoken result; |
| 434 | |
| 435 | result.ptr = name; |
| 436 | while (len > 0 && isspace (name0[len-1])) |
| 437 | len -= 1; |
| 438 | |
| 439 | if (strstr (name0, "___") != NULL) |
| 440 | { |
| 441 | strncpy (name, name0, len); |
| 442 | name[len] = '\000'; |
| 443 | result.length = len; |
| 444 | return result; |
| 445 | } |
| 446 | |
| 447 | i = i0 = 0; |
| 448 | while (i0 < len) |
| 449 | { |
| 450 | if (isalnum (name0[i0])) |
| 451 | { |
| 452 | name[i] = tolower (name0[i0]); |
| 453 | i += 1; i0 += 1; |
| 454 | } |
| 455 | else switch (name0[i0]) |
| 456 | { |
| 457 | default: |
| 458 | name[i] = name0[i0]; |
| 459 | i += 1; i0 += 1; |
| 460 | break; |
| 461 | case ' ': case '\t': |
| 462 | i0 += 1; |
| 463 | break; |
| 464 | case '\'': |
| 465 | do |
| 466 | { |
| 467 | name[i] = name0[i0]; |
| 468 | i += 1; i0 += 1; |
| 469 | } |
| 470 | while (i0 < len && name0[i0] != '\''); |
| 471 | i0 += 1; |
| 472 | break; |
| 473 | case '<': |
| 474 | i0 += 1; |
| 475 | while (i0 < len && name0[i0] != '>') |
| 476 | { |
| 477 | name[i] = name0[i0]; |
| 478 | i += 1; i0 += 1; |
| 479 | } |
| 480 | i0 += 1; |
| 481 | break; |
| 482 | } |
| 483 | } |
| 484 | name[i] = '\000'; |
| 485 | |
| 486 | result.length = i; |
| 487 | return result; |
| 488 | } |
| 489 | |
| 490 | /* Return TEXT[0..LEN-1], a string literal without surrounding quotes, |
| 491 | with special hex character notations replaced with characters. |
| 492 | Result valid until the next call to ada_parse. */ |
| 493 | |
| 494 | static struct stoken |
| 495 | processString (const char *text, int len) |
| 496 | { |
| 497 | const char *p; |
| 498 | char *q; |
| 499 | const char *lim = text + len; |
| 500 | struct stoken result; |
| 501 | |
| 502 | q = (char *) obstack_alloc (&temp_parse_space, len); |
| 503 | result.ptr = q; |
| 504 | p = text; |
| 505 | while (p < lim) |
| 506 | { |
| 507 | if (p[0] == '[' && p[1] == '"' && p+2 < lim) |
| 508 | { |
| 509 | if (p[2] == '"') /* "...["""]... */ |
| 510 | { |
| 511 | *q = '"'; |
| 512 | p += 4; |
| 513 | } |
| 514 | else |
| 515 | { |
| 516 | int chr; |
| 517 | sscanf (p+2, "%2x", &chr); |
| 518 | *q = (char) chr; |
| 519 | p += 5; |
| 520 | } |
| 521 | } |
| 522 | else |
| 523 | *q = *p; |
| 524 | q += 1; |
| 525 | p += 1; |
| 526 | } |
| 527 | result.length = q - result.ptr; |
| 528 | return result; |
| 529 | } |
| 530 | |
| 531 | /* Returns the position within STR of the '.' in a |
| 532 | '.{WHITE}*all' component of a dotted name, or -1 if there is none. |
| 533 | Note: we actually don't need this routine, since 'all' can never be an |
| 534 | Ada identifier. Thus, looking up foo.all or foo.all.x as a name |
| 535 | must fail, and will eventually be interpreted as (foo).all or |
| 536 | (foo).all.x. However, this does avoid an extraneous lookup. */ |
| 537 | |
| 538 | static int |
| 539 | find_dot_all (const char *str) |
| 540 | { |
| 541 | int i; |
| 542 | |
| 543 | for (i = 0; str[i] != '\000'; i++) |
| 544 | if (str[i] == '.') |
| 545 | { |
| 546 | int i0 = i; |
| 547 | |
| 548 | do |
| 549 | i += 1; |
| 550 | while (isspace (str[i])); |
| 551 | |
| 552 | if (strncasecmp (str + i, "all", 3) == 0 |
| 553 | && !isalnum (str[i + 3]) && str[i + 3] != '_') |
| 554 | return i0; |
| 555 | } |
| 556 | return -1; |
| 557 | } |
| 558 | |
| 559 | /* Returns non-zero iff string SUBSEQ matches a subsequence of STR, ignoring |
| 560 | case. */ |
| 561 | |
| 562 | static int |
| 563 | subseqMatch (const char *subseq, const char *str) |
| 564 | { |
| 565 | if (subseq[0] == '\0') |
| 566 | return 1; |
| 567 | else if (str[0] == '\0') |
| 568 | return 0; |
| 569 | else if (tolower (subseq[0]) == tolower (str[0])) |
| 570 | return subseqMatch (subseq+1, str+1) || subseqMatch (subseq, str+1); |
| 571 | else |
| 572 | return subseqMatch (subseq, str+1); |
| 573 | } |
| 574 | |
| 575 | |
| 576 | static struct { const char *name; int code; } |
| 577 | attributes[] = { |
| 578 | { "address", TICK_ADDRESS }, |
| 579 | { "unchecked_access", TICK_ACCESS }, |
| 580 | { "unrestricted_access", TICK_ACCESS }, |
| 581 | { "access", TICK_ACCESS }, |
| 582 | { "first", TICK_FIRST }, |
| 583 | { "last", TICK_LAST }, |
| 584 | { "length", TICK_LENGTH }, |
| 585 | { "max", TICK_MAX }, |
| 586 | { "min", TICK_MIN }, |
| 587 | { "modulus", TICK_MODULUS }, |
| 588 | { "pos", TICK_POS }, |
| 589 | { "range", TICK_RANGE }, |
| 590 | { "size", TICK_SIZE }, |
| 591 | { "tag", TICK_TAG }, |
| 592 | { "val", TICK_VAL }, |
| 593 | { NULL, -1 } |
| 594 | }; |
| 595 | |
| 596 | /* Return the syntactic code corresponding to the attribute name or |
| 597 | abbreviation STR. */ |
| 598 | |
| 599 | static int |
| 600 | processAttribute (const char *str) |
| 601 | { |
| 602 | int i, k; |
| 603 | |
| 604 | for (i = 0; attributes[i].code != -1; i += 1) |
| 605 | if (strcasecmp (str, attributes[i].name) == 0) |
| 606 | return attributes[i].code; |
| 607 | |
| 608 | for (i = 0, k = -1; attributes[i].code != -1; i += 1) |
| 609 | if (subseqMatch (str, attributes[i].name)) |
| 610 | { |
| 611 | if (k == -1) |
| 612 | k = i; |
| 613 | else |
| 614 | error (_("ambiguous attribute name: `%s'"), str); |
| 615 | } |
| 616 | if (k == -1) |
| 617 | error (_("unrecognized attribute: `%s'"), str); |
| 618 | |
| 619 | return attributes[k].code; |
| 620 | } |
| 621 | |
| 622 | /* Back up lexptr by yyleng and then to the rightmost occurrence of |
| 623 | character CH, case-folded (there must be one). WARNING: since |
| 624 | lexptr points to the next input character that Flex has not yet |
| 625 | transferred to its internal buffer, the use of this function |
| 626 | depends on the assumption that Flex calls YY_INPUT only when it is |
| 627 | logically necessary to do so (thus, there is no reading ahead |
| 628 | farther than needed to identify the next token.) */ |
| 629 | |
| 630 | static void |
| 631 | rewind_to_char (int ch) |
| 632 | { |
| 633 | lexptr -= yyleng; |
| 634 | while (toupper (*lexptr) != toupper (ch)) |
| 635 | lexptr -= 1; |
| 636 | yyrestart (NULL); |
| 637 | } |
| 638 | |
| 639 | int |
| 640 | yywrap(void) |
| 641 | { |
| 642 | return 1; |
| 643 | } |
| 644 | |
| 645 | /* Dummy definition to suppress warnings about unused static definitions. */ |
| 646 | typedef void (*dummy_function) (); |
| 647 | dummy_function ada_flex_use[] = |
| 648 | { |
| 649 | (dummy_function) yyunput |
| 650 | }; |