| 1 | /* FLEX lexer for Ada expressions, for GDB. |
| 2 | Copyright (C) 1994, 1997, 1998, 2000, 2001, 2002, 2003 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | /*----------------------------------------------------------------------*/ |
| 22 | |
| 23 | /* The converted version of this file is to be included in ada-exp.y, */ |
| 24 | /* the Ada parser for gdb. The function yylex obtains characters from */ |
| 25 | /* the global pointer lexptr. It returns a syntactic category for */ |
| 26 | /* each successive token and places a semantic value into yylval */ |
| 27 | /* (ada-lval), defined by the parser. */ |
| 28 | |
| 29 | DIG [0-9] |
| 30 | NUM10 ({DIG}({DIG}|_)*) |
| 31 | HEXDIG [0-9a-f] |
| 32 | NUM16 ({HEXDIG}({HEXDIG}|_)*) |
| 33 | OCTDIG [0-7] |
| 34 | LETTER [a-z_] |
| 35 | ID ({LETTER}({LETTER}|{DIG})*|"<"{LETTER}({LETTER}|{DIG})*">") |
| 36 | WHITE [ \t\n] |
| 37 | TICK ("'"{WHITE}*) |
| 38 | GRAPHIC [a-z0-9 #&'()*+,-./:;<>=_|!$%?@\[\]\\^`{}~] |
| 39 | OPER ([-+*/=<>&]|"<="|">="|"**"|"/="|"and"|"or"|"xor"|"not"|"mod"|"rem"|"abs") |
| 40 | |
| 41 | EXP (e[+-]{NUM10}) |
| 42 | POSEXP (e"+"?{NUM10}) |
| 43 | |
| 44 | %{ |
| 45 | |
| 46 | #define NUMERAL_WIDTH 256 |
| 47 | #define LONGEST_SIGN ((ULONGEST) 1 << (sizeof(LONGEST) * HOST_CHAR_BIT - 1)) |
| 48 | |
| 49 | /* Temporary staging for numeric literals. */ |
| 50 | static char numbuf[NUMERAL_WIDTH]; |
| 51 | static void canonicalizeNumeral (char *s1, const char *); |
| 52 | static int processInt (const char *, const char *, const char *); |
| 53 | static int processReal (const char *); |
| 54 | static int processId (const char *, int); |
| 55 | static int processAttribute (const char *); |
| 56 | static int find_dot_all (const char *); |
| 57 | |
| 58 | #undef YY_DECL |
| 59 | #define YY_DECL static int yylex ( void ) |
| 60 | |
| 61 | #undef YY_INPUT |
| 62 | #define YY_INPUT(BUF, RESULT, MAX_SIZE) \ |
| 63 | if ( *lexptr == '\000' ) \ |
| 64 | (RESULT) = YY_NULL; \ |
| 65 | else \ |
| 66 | { \ |
| 67 | *(BUF) = *lexptr; \ |
| 68 | (RESULT) = 1; \ |
| 69 | lexptr += 1; \ |
| 70 | } |
| 71 | |
| 72 | static char *tempbuf = NULL; |
| 73 | static int tempbufsize = 0; |
| 74 | static int tempbuf_len; |
| 75 | static struct block *left_block_context; |
| 76 | |
| 77 | static void resize_tempbuf (unsigned int); |
| 78 | |
| 79 | static void block_lookup (char *, char *); |
| 80 | |
| 81 | static int name_lookup (char *, char *, int *, int); |
| 82 | |
| 83 | static int find_dot_all (const char *); |
| 84 | |
| 85 | %} |
| 86 | |
| 87 | %option case-insensitive interactive nodefault |
| 88 | |
| 89 | %s IN_STRING BEFORE_QUAL_QUOTE |
| 90 | |
| 91 | %% |
| 92 | |
| 93 | {WHITE} { } |
| 94 | |
| 95 | "--".* { yyterminate(); } |
| 96 | |
| 97 | {NUM10}{POSEXP} { |
| 98 | canonicalizeNumeral (numbuf, yytext); |
| 99 | return processInt (NULL, numbuf, strrchr(numbuf, 'e')+1); |
| 100 | } |
| 101 | |
| 102 | {NUM10} { |
| 103 | canonicalizeNumeral (numbuf, yytext); |
| 104 | return processInt (NULL, numbuf, NULL); |
| 105 | } |
| 106 | |
| 107 | {NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#"{POSEXP} { |
| 108 | canonicalizeNumeral (numbuf, yytext); |
| 109 | return processInt (numbuf, |
| 110 | strchr (numbuf, '#') + 1, |
| 111 | strrchr(numbuf, '#') + 1); |
| 112 | } |
| 113 | |
| 114 | {NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#" { |
| 115 | canonicalizeNumeral (numbuf, yytext); |
| 116 | return processInt (numbuf, strchr (numbuf, '#') + 1, NULL); |
| 117 | } |
| 118 | |
| 119 | "0x"{HEXDIG}+ { |
| 120 | canonicalizeNumeral (numbuf, yytext+2); |
| 121 | return processInt ("16#", numbuf, NULL); |
| 122 | } |
| 123 | |
| 124 | |
| 125 | {NUM10}"."{NUM10}{EXP} { |
| 126 | canonicalizeNumeral (numbuf, yytext); |
| 127 | return processReal (numbuf); |
| 128 | } |
| 129 | |
| 130 | {NUM10}"."{NUM10} { |
| 131 | canonicalizeNumeral (numbuf, yytext); |
| 132 | return processReal (numbuf); |
| 133 | } |
| 134 | |
| 135 | {NUM10}"#"{NUM16}"."{NUM16}"#"{EXP} { |
| 136 | error ("Based real literals not implemented yet."); |
| 137 | } |
| 138 | |
| 139 | {NUM10}"#"{NUM16}"."{NUM16}"#" { |
| 140 | error ("Based real literals not implemented yet."); |
| 141 | } |
| 142 | |
| 143 | <INITIAL>"'"({GRAPHIC}|\")"'" { |
| 144 | yylval.typed_val.type = type_char (); |
| 145 | yylval.typed_val.val = yytext[1]; |
| 146 | return CHARLIT; |
| 147 | } |
| 148 | |
| 149 | <INITIAL>"'[\""{HEXDIG}{2}"\"]'" { |
| 150 | int v; |
| 151 | yylval.typed_val.type = type_char (); |
| 152 | sscanf (yytext+3, "%2x", &v); |
| 153 | yylval.typed_val.val = v; |
| 154 | return CHARLIT; |
| 155 | } |
| 156 | |
| 157 | <INITIAL>\" { |
| 158 | tempbuf_len = 0; |
| 159 | BEGIN IN_STRING; |
| 160 | } |
| 161 | |
| 162 | <IN_STRING>{GRAPHIC}*\" { |
| 163 | resize_tempbuf (yyleng+tempbuf_len); |
| 164 | strncpy (tempbuf+tempbuf_len, yytext, yyleng-1); |
| 165 | tempbuf_len += yyleng-1; |
| 166 | yylval.sval.ptr = tempbuf; |
| 167 | yylval.sval.length = tempbuf_len; |
| 168 | BEGIN INITIAL; |
| 169 | return STRING; |
| 170 | } |
| 171 | |
| 172 | <IN_STRING>{GRAPHIC}*"[\""{HEXDIG}{2}"\"]" { |
| 173 | int n; |
| 174 | resize_tempbuf (yyleng-5+tempbuf_len+1); |
| 175 | strncpy (tempbuf+tempbuf_len, yytext, yyleng-6); |
| 176 | sscanf(yytext+yyleng-4, "%2x", &n); |
| 177 | tempbuf[yyleng-6+tempbuf_len] = (char) n; |
| 178 | tempbuf_len += yyleng-5; |
| 179 | } |
| 180 | |
| 181 | <IN_STRING>{GRAPHIC}*"[\"\"\"]" { |
| 182 | int n; |
| 183 | resize_tempbuf (yyleng-4+tempbuf_len+1); |
| 184 | strncpy (tempbuf+tempbuf_len, yytext, yyleng-6); |
| 185 | tempbuf[yyleng-5+tempbuf_len] = '"'; |
| 186 | tempbuf_len += yyleng-4; |
| 187 | } |
| 188 | |
| 189 | if { |
| 190 | while (*lexptr != 'i' && *lexptr != 'I') |
| 191 | lexptr -= 1; |
| 192 | yyrestart(NULL); |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | /* ADA KEYWORDS */ |
| 197 | |
| 198 | abs { return ABS; } |
| 199 | and { return _AND_; } |
| 200 | else { return ELSE; } |
| 201 | in { return IN; } |
| 202 | mod { return MOD; } |
| 203 | new { return NEW; } |
| 204 | not { return NOT; } |
| 205 | null { return NULL_PTR; } |
| 206 | or { return OR; } |
| 207 | rem { return REM; } |
| 208 | then { return THEN; } |
| 209 | xor { return XOR; } |
| 210 | |
| 211 | /* ATTRIBUTES */ |
| 212 | |
| 213 | {TICK}[a-zA-Z][a-zA-Z]+ { return processAttribute (yytext+1); } |
| 214 | |
| 215 | /* PUNCTUATION */ |
| 216 | |
| 217 | "=>" { return ARROW; } |
| 218 | ".." { return DOTDOT; } |
| 219 | "**" { return STARSTAR; } |
| 220 | ":=" { return ASSIGN; } |
| 221 | "/=" { return NOTEQUAL; } |
| 222 | "<=" { return LEQ; } |
| 223 | ">=" { return GEQ; } |
| 224 | |
| 225 | <BEFORE_QUAL_QUOTE>"'" { BEGIN INITIAL; return '\''; } |
| 226 | |
| 227 | [-&*+./:<>=|;\[\]] { return yytext[0]; } |
| 228 | |
| 229 | "," { if (paren_depth == 0 && comma_terminates) |
| 230 | { |
| 231 | lexptr -= 1; |
| 232 | yyrestart(NULL); |
| 233 | return 0; |
| 234 | } |
| 235 | else |
| 236 | return ','; |
| 237 | } |
| 238 | |
| 239 | "(" { paren_depth += 1; return '('; } |
| 240 | ")" { if (paren_depth == 0) |
| 241 | { |
| 242 | lexptr -= 1; |
| 243 | yyrestart(NULL); |
| 244 | return 0; |
| 245 | } |
| 246 | else |
| 247 | { |
| 248 | paren_depth -= 1; |
| 249 | return ')'; |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | "."{WHITE}*all { return DOT_ALL; } |
| 254 | |
| 255 | "."{WHITE}*{ID} { |
| 256 | processId (yytext+1, yyleng-1); |
| 257 | return DOT_ID; |
| 258 | } |
| 259 | |
| 260 | {ID}({WHITE}*"."{WHITE}*({ID}|\"{OPER}\"))*(" "*"'")? { |
| 261 | int all_posn = find_dot_all (yytext); |
| 262 | int token_type, segments, k; |
| 263 | int quote_follows; |
| 264 | |
| 265 | if (all_posn == -1 && yytext[yyleng-1] == '\'') |
| 266 | { |
| 267 | quote_follows = 1; |
| 268 | do { |
| 269 | yyless (yyleng-1); |
| 270 | } while (yytext[yyleng-1] == ' '); |
| 271 | } |
| 272 | else |
| 273 | quote_follows = 0; |
| 274 | |
| 275 | if (all_posn >= 0) |
| 276 | yyless (all_posn); |
| 277 | processId(yytext, yyleng); |
| 278 | segments = name_lookup (ada_encode (yylval.ssym.stoken.ptr), |
| 279 | yylval.ssym.stoken.ptr, |
| 280 | &token_type, |
| 281 | MAX_RENAMING_CHAIN_LENGTH); |
| 282 | left_block_context = NULL; |
| 283 | for (k = yyleng; segments > 0 && k > 0; k -= 1) |
| 284 | { |
| 285 | if (yytext[k-1] == '.') |
| 286 | segments -= 1; |
| 287 | quote_follows = 0; |
| 288 | } |
| 289 | if (k <= 0) |
| 290 | error ("confused by name %s", yytext); |
| 291 | yyless (k); |
| 292 | if (quote_follows) |
| 293 | BEGIN BEFORE_QUAL_QUOTE; |
| 294 | return token_type; |
| 295 | } |
| 296 | |
| 297 | /* GDB EXPRESSION CONSTRUCTS */ |
| 298 | |
| 299 | |
| 300 | "'"[^']+"'"{WHITE}*:: { |
| 301 | processId(yytext, yyleng-2); |
| 302 | block_lookup (yylval.ssym.stoken.ptr, yylval.ssym.stoken.ptr); |
| 303 | return BLOCKNAME; |
| 304 | } |
| 305 | |
| 306 | {ID}({WHITE}*"."{WHITE}*({ID}|\"{OPER}\"))*{WHITE}*:: { |
| 307 | processId(yytext, yyleng-2); |
| 308 | block_lookup (ada_encode (yylval.ssym.stoken.ptr), |
| 309 | yylval.ssym.stoken.ptr); |
| 310 | return BLOCKNAME; |
| 311 | } |
| 312 | |
| 313 | [{}@] { return yytext[0]; } |
| 314 | |
| 315 | /* REGISTERS AND GDB CONVENIENCE VARIABLES */ |
| 316 | |
| 317 | "$"({LETTER}|{DIG}|"$")* { |
| 318 | yylval.sval.ptr = yytext; |
| 319 | yylval.sval.length = yyleng; |
| 320 | return SPECIAL_VARIABLE; |
| 321 | } |
| 322 | |
| 323 | /* CATCH-ALL ERROR CASE */ |
| 324 | |
| 325 | . { error ("Invalid character '%s' in expression.", yytext); } |
| 326 | %% |
| 327 | |
| 328 | #include <ctype.h> |
| 329 | #include "gdb_string.h" |
| 330 | |
| 331 | /* Initialize the lexer for processing new expression */ |
| 332 | void |
| 333 | lexer_init (FILE *inp) |
| 334 | { |
| 335 | BEGIN INITIAL; |
| 336 | yyrestart (inp); |
| 337 | } |
| 338 | |
| 339 | |
| 340 | /* Make sure that tempbuf points at an array at least N characters long. */ |
| 341 | |
| 342 | static void |
| 343 | resize_tempbuf (unsigned int n) |
| 344 | { |
| 345 | if (tempbufsize < n) |
| 346 | { |
| 347 | tempbufsize = (n+63) & ~63; |
| 348 | tempbuf = xrealloc (tempbuf, tempbufsize); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | /* Copy S2 to S1, removing all underscores, and downcasing all letters. */ |
| 353 | |
| 354 | static void |
| 355 | canonicalizeNumeral (char *s1, const char *s2) |
| 356 | { |
| 357 | for (; *s2 != '\000'; s2 += 1) |
| 358 | { |
| 359 | if (*s2 != '_') |
| 360 | { |
| 361 | *s1 = tolower(*s2); |
| 362 | s1 += 1; |
| 363 | } |
| 364 | } |
| 365 | s1[0] = '\000'; |
| 366 | } |
| 367 | |
| 368 | #define HIGH_BYTE_POSN ((sizeof (ULONGEST) - 1) * HOST_CHAR_BIT) |
| 369 | |
| 370 | /* True (non-zero) iff DIGIT is a valid digit in radix BASE, |
| 371 | where 2 <= BASE <= 16. */ |
| 372 | |
| 373 | static int |
| 374 | is_digit_in_base (unsigned char digit, int base) |
| 375 | { |
| 376 | if (!isxdigit (digit)) |
| 377 | return 0; |
| 378 | if (base <= 10) |
| 379 | return (isdigit (digit) && digit < base + '0'); |
| 380 | else |
| 381 | return (isdigit (digit) || tolower (digit) < base - 10 + 'a'); |
| 382 | } |
| 383 | |
| 384 | static int |
| 385 | digit_to_int (unsigned char c) |
| 386 | { |
| 387 | if (isdigit (c)) |
| 388 | return c - '0'; |
| 389 | else |
| 390 | return tolower (c) - 'a' + 10; |
| 391 | } |
| 392 | |
| 393 | /* As for strtoul, but for ULONGEST results. */ |
| 394 | ULONGEST |
| 395 | strtoulst (const char *num, const char **trailer, int base) |
| 396 | { |
| 397 | unsigned int high_part; |
| 398 | ULONGEST result; |
| 399 | int i; |
| 400 | unsigned char lim; |
| 401 | |
| 402 | if (base < 2 || base > 16) |
| 403 | { |
| 404 | errno = EINVAL; |
| 405 | return 0; |
| 406 | } |
| 407 | lim = base - 1 + '0'; |
| 408 | |
| 409 | result = high_part = 0; |
| 410 | for (i = 0; is_digit_in_base (num[i], base); i += 1) |
| 411 | { |
| 412 | result = result*base + digit_to_int (num[i]); |
| 413 | high_part = high_part*base + (unsigned int) (result >> HIGH_BYTE_POSN); |
| 414 | result &= ((ULONGEST) 1 << HIGH_BYTE_POSN) - 1; |
| 415 | if (high_part > 0xff) |
| 416 | { |
| 417 | errno = ERANGE; |
| 418 | result = high_part = 0; |
| 419 | break; |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | if (trailer != NULL) |
| 424 | *trailer = &num[i]; |
| 425 | |
| 426 | return result + ((ULONGEST) high_part << HIGH_BYTE_POSN); |
| 427 | } |
| 428 | |
| 429 | |
| 430 | |
| 431 | /* Interprets the prefix of NUM that consists of digits of the given BASE |
| 432 | as an integer of that BASE, with the string EXP as an exponent. |
| 433 | Puts value in yylval, and returns INT, if the string is valid. Causes |
| 434 | an error if the number is improperly formated. BASE, if NULL, defaults |
| 435 | to "10", and EXP to "1". The EXP does not contain a leading 'e' or 'E'. */ |
| 436 | |
| 437 | static int |
| 438 | processInt (const char *base0, const char *num0, const char *exp0) |
| 439 | { |
| 440 | ULONGEST result; |
| 441 | long exp; |
| 442 | int base; |
| 443 | |
| 444 | char *trailer; |
| 445 | |
| 446 | if (base0 == NULL) |
| 447 | base = 10; |
| 448 | else |
| 449 | { |
| 450 | base = strtol (base0, (char **) NULL, 10); |
| 451 | if (base < 2 || base > 16) |
| 452 | error ("Invalid base: %d.", base); |
| 453 | } |
| 454 | |
| 455 | if (exp0 == NULL) |
| 456 | exp = 0; |
| 457 | else |
| 458 | exp = strtol(exp0, (char **) NULL, 10); |
| 459 | |
| 460 | errno = 0; |
| 461 | result = strtoulst (num0, (const char **) &trailer, base); |
| 462 | if (errno == ERANGE) |
| 463 | error ("Integer literal out of range"); |
| 464 | if (isxdigit(*trailer)) |
| 465 | error ("Invalid digit `%c' in based literal", *trailer); |
| 466 | |
| 467 | while (exp > 0) |
| 468 | { |
| 469 | if (result > (ULONG_MAX / base)) |
| 470 | error ("Integer literal out of range"); |
| 471 | result *= base; |
| 472 | exp -= 1; |
| 473 | } |
| 474 | |
| 475 | if ((result >> (TARGET_INT_BIT-1)) == 0) |
| 476 | yylval.typed_val.type = type_int (); |
| 477 | else if ((result >> (TARGET_LONG_BIT-1)) == 0) |
| 478 | yylval.typed_val.type = type_long (); |
| 479 | else if (((result >> (TARGET_LONG_BIT-1)) >> 1) == 0) |
| 480 | { |
| 481 | /* We have a number representable as an unsigned integer quantity. |
| 482 | For consistency with the C treatment, we will treat it as an |
| 483 | anonymous modular (unsigned) quantity. Alas, the types are such |
| 484 | that we need to store .val as a signed quantity. Sorry |
| 485 | for the mess, but C doesn't officially guarantee that a simple |
| 486 | assignment does the trick (no, it doesn't; read the reference manual). |
| 487 | */ |
| 488 | yylval.typed_val.type = builtin_type_unsigned_long; |
| 489 | if (result & LONGEST_SIGN) |
| 490 | yylval.typed_val.val = |
| 491 | (LONGEST) (result & ~LONGEST_SIGN) |
| 492 | - (LONGEST_SIGN>>1) - (LONGEST_SIGN>>1); |
| 493 | else |
| 494 | yylval.typed_val.val = (LONGEST) result; |
| 495 | return INT; |
| 496 | } |
| 497 | else |
| 498 | yylval.typed_val.type = type_long_long (); |
| 499 | |
| 500 | yylval.typed_val.val = (LONGEST) result; |
| 501 | return INT; |
| 502 | } |
| 503 | |
| 504 | #if defined (PRINTF_HAS_LONG_DOUBLE) |
| 505 | # undef PRINTF_HAS_LONG_DOUBLE |
| 506 | # define PRINTF_HAS_LONG_DOUBLE 1 |
| 507 | #else |
| 508 | # define PRINTF_HAS_LONG_DOUBLE 0 |
| 509 | #endif |
| 510 | |
| 511 | static int |
| 512 | processReal (const char *num0) |
| 513 | { |
| 514 | #if defined (PRINTF_HAS_LONG_DOUBLE) |
| 515 | if (sizeof (DOUBLEST) > sizeof (double)) |
| 516 | sscanf (num0, "%Lg", &yylval.typed_val_float.dval); |
| 517 | else |
| 518 | #endif |
| 519 | { |
| 520 | double temp; |
| 521 | sscanf (num0, "%lg", &temp); |
| 522 | yylval.typed_val_float.dval = temp; |
| 523 | } |
| 524 | |
| 525 | yylval.typed_val_float.type = type_float (); |
| 526 | if (sizeof(DOUBLEST) >= TARGET_DOUBLE_BIT / TARGET_CHAR_BIT) |
| 527 | yylval.typed_val_float.type = type_double (); |
| 528 | if (sizeof(DOUBLEST) >= TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT) |
| 529 | yylval.typed_val_float.type = type_long_double (); |
| 530 | |
| 531 | return FLOAT; |
| 532 | } |
| 533 | |
| 534 | static int |
| 535 | processId (const char *name0, int len) |
| 536 | { |
| 537 | char *name = obstack_alloc (&temp_parse_space, len + 11); |
| 538 | int i0, i; |
| 539 | |
| 540 | while (len > 0 && isspace (name0[len-1])) |
| 541 | len -= 1; |
| 542 | i = i0 = 0; |
| 543 | while (i0 < len) |
| 544 | { |
| 545 | if (isalnum (name0[i0])) |
| 546 | { |
| 547 | name[i] = tolower (name0[i0]); |
| 548 | i += 1; i0 += 1; |
| 549 | } |
| 550 | else switch (name0[i0]) |
| 551 | { |
| 552 | default: |
| 553 | name[i] = name0[i0]; |
| 554 | i += 1; i0 += 1; |
| 555 | break; |
| 556 | case ' ': case '\t': |
| 557 | i0 += 1; |
| 558 | break; |
| 559 | case '\'': |
| 560 | i0 += 1; |
| 561 | while (i0 < len && name0[i0] != '\'') |
| 562 | { |
| 563 | name[i] = name0[i0]; |
| 564 | i += 1; i0 += 1; |
| 565 | } |
| 566 | i0 += 1; |
| 567 | break; |
| 568 | case '<': |
| 569 | i0 += 1; |
| 570 | while (i0 < len && name0[i0] != '>') |
| 571 | { |
| 572 | name[i] = name0[i0]; |
| 573 | i += 1; i0 += 1; |
| 574 | } |
| 575 | i0 += 1; |
| 576 | break; |
| 577 | } |
| 578 | } |
| 579 | name[i] = '\000'; |
| 580 | |
| 581 | yylval.ssym.sym = NULL; |
| 582 | yylval.ssym.stoken.ptr = name; |
| 583 | yylval.ssym.stoken.length = i; |
| 584 | return NAME; |
| 585 | } |
| 586 | |
| 587 | static void |
| 588 | block_lookup (char *name, char *err_name) |
| 589 | { |
| 590 | struct ada_symbol_info *syms; |
| 591 | int nsyms; |
| 592 | struct symtab *symtab; |
| 593 | nsyms = ada_lookup_symbol_list (name, left_block_context, |
| 594 | VAR_DOMAIN, &syms); |
| 595 | if (left_block_context == NULL && |
| 596 | (nsyms == 0 || SYMBOL_CLASS (syms[0].sym) != LOC_BLOCK)) |
| 597 | symtab = lookup_symtab (name); |
| 598 | else |
| 599 | symtab = NULL; |
| 600 | |
| 601 | if (symtab != NULL) |
| 602 | left_block_context = yylval.bval = |
| 603 | BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK); |
| 604 | else if (nsyms == 0 || SYMBOL_CLASS (syms[0].sym) != LOC_BLOCK) |
| 605 | { |
| 606 | if (left_block_context == NULL) |
| 607 | error ("No file or function \"%s\".", err_name); |
| 608 | else |
| 609 | error ("No function \"%s\" in specified context.", err_name); |
| 610 | } |
| 611 | else |
| 612 | { |
| 613 | left_block_context = yylval.bval = SYMBOL_BLOCK_VALUE (syms[0].sym); |
| 614 | if (nsyms > 1) |
| 615 | warning ("Function name \"%s\" ambiguous here", err_name); |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | /* Look up NAME0 (assumed to be encoded) as a name in VAR_DOMAIN, |
| 620 | setting *TOKEN_TYPE to NAME or TYPENAME, depending on what is |
| 621 | found. Try first the entire name, then the name without the last |
| 622 | segment (i.e., after the last .id), etc., and return the number of |
| 623 | segments that had to be removed to get a match. Try only the full |
| 624 | name if it starts with "standard__". Calls error if no |
| 625 | matches are found, using ERR_NAME in any error message. When |
| 626 | exactly one symbol match is found, it is placed in yylval. When |
| 627 | the symbol is a renaming, follow at most DEPTH steps to find the |
| 628 | ultimate definition; cause error if depth exceeded. */ |
| 629 | |
| 630 | static int |
| 631 | name_lookup (char *name0, char *err_name, int *token_type, int depth) |
| 632 | { |
| 633 | struct ada_symbol_info *syms; |
| 634 | struct type *type; |
| 635 | int len0 = strlen (name0); |
| 636 | char *name = obsavestring (name0, len0, &temp_parse_space); |
| 637 | int nsyms; |
| 638 | int segments; |
| 639 | |
| 640 | if (depth <= 0) |
| 641 | error ("Could not find renamed symbol \"%s\"", err_name); |
| 642 | |
| 643 | yylval.ssym.stoken.ptr = name; |
| 644 | yylval.ssym.stoken.length = strlen (name); |
| 645 | for (segments = 0; ; segments += 1) |
| 646 | { |
| 647 | struct type *preferred_type; |
| 648 | int i, preferred_index; |
| 649 | |
| 650 | if (left_block_context == NULL) |
| 651 | nsyms = ada_lookup_symbol_list (name, expression_context_block, |
| 652 | VAR_DOMAIN, &syms); |
| 653 | else |
| 654 | nsyms = ada_lookup_symbol_list (name, left_block_context, |
| 655 | VAR_DOMAIN, &syms); |
| 656 | |
| 657 | |
| 658 | /* Check for a type renaming. */ |
| 659 | |
| 660 | if (nsyms == 1 && !ada_is_object_renaming (syms[0].sym)) |
| 661 | { |
| 662 | struct symbol *renaming_sym = |
| 663 | ada_find_renaming_symbol (SYMBOL_LINKAGE_NAME (syms[0].sym), |
| 664 | syms[0].block); |
| 665 | |
| 666 | if (renaming_sym != NULL) |
| 667 | syms[0].sym = renaming_sym; |
| 668 | } |
| 669 | |
| 670 | /* Check for a type definition. */ |
| 671 | |
| 672 | /* Look for a symbol that doesn't denote void. This is (I think) a */ |
| 673 | /* temporary kludge to get around problems in GNAT output. */ |
| 674 | preferred_index = -1; preferred_type = NULL; |
| 675 | for (i = 0; i < nsyms; i += 1) |
| 676 | switch (SYMBOL_CLASS (syms[i].sym)) |
| 677 | { |
| 678 | case LOC_TYPEDEF: |
| 679 | if (ada_prefer_type (SYMBOL_TYPE (syms[i].sym), preferred_type)) |
| 680 | { |
| 681 | preferred_index = i; |
| 682 | preferred_type = SYMBOL_TYPE (syms[i].sym); |
| 683 | } |
| 684 | break; |
| 685 | case LOC_REGISTER: |
| 686 | case LOC_ARG: |
| 687 | case LOC_REF_ARG: |
| 688 | case LOC_REGPARM: |
| 689 | case LOC_REGPARM_ADDR: |
| 690 | case LOC_LOCAL: |
| 691 | case LOC_LOCAL_ARG: |
| 692 | case LOC_BASEREG: |
| 693 | case LOC_BASEREG_ARG: |
| 694 | case LOC_COMPUTED: |
| 695 | case LOC_COMPUTED_ARG: |
| 696 | goto NotType; |
| 697 | default: |
| 698 | break; |
| 699 | } |
| 700 | if (preferred_type != NULL) |
| 701 | { |
| 702 | if (TYPE_CODE (preferred_type) == TYPE_CODE_VOID) |
| 703 | error ("`%s' matches only void type name(s)", |
| 704 | ada_decode (name)); |
| 705 | else if (ada_is_object_renaming (syms[preferred_index].sym)) |
| 706 | { |
| 707 | yylval.ssym.sym = syms[preferred_index].sym; |
| 708 | *token_type = OBJECT_RENAMING; |
| 709 | return segments; |
| 710 | } |
| 711 | else if (ada_renaming_type (SYMBOL_TYPE (syms[preferred_index].sym)) |
| 712 | != NULL) |
| 713 | { |
| 714 | int result; |
| 715 | char *renaming |
| 716 | = ada_simple_renamed_entity (syms[preferred_index].sym); |
| 717 | char *new_name |
| 718 | = (char *) obstack_alloc (&temp_parse_space, |
| 719 | strlen (renaming) + len0 |
| 720 | - yylval.ssym.stoken.length + 1); |
| 721 | strcpy (new_name, renaming); |
| 722 | xfree (renaming); |
| 723 | strcat (new_name, name0 + yylval.ssym.stoken.length); |
| 724 | result = name_lookup (new_name, err_name, token_type, depth - 1); |
| 725 | if (result > segments) |
| 726 | error ("Confused by renamed symbol."); |
| 727 | return result; |
| 728 | } |
| 729 | else if (segments == 0) |
| 730 | { |
| 731 | yylval.tval = preferred_type; |
| 732 | *token_type = TYPENAME; |
| 733 | return 0; |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | if (segments == 0) |
| 738 | { |
| 739 | type = language_lookup_primitive_type_by_name (current_language, |
| 740 | current_gdbarch, |
| 741 | name); |
| 742 | if (type == NULL && strcmp ("system__address", name) == 0) |
| 743 | type = type_system_address (); |
| 744 | if (type != NULL) |
| 745 | { |
| 746 | /* First check to see if we have a regular definition of this |
| 747 | type that just didn't happen to have been read yet. */ |
| 748 | int ntypes; |
| 749 | struct symbol *sym; |
| 750 | char *expanded_name = |
| 751 | (char *) alloca (strlen (name) + sizeof ("standard__")); |
| 752 | strcpy (expanded_name, "standard__"); |
| 753 | strcat (expanded_name, name); |
| 754 | sym = ada_lookup_symbol (expanded_name, NULL, |
| 755 | VAR_DOMAIN, NULL, NULL); |
| 756 | if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
| 757 | type = SYMBOL_TYPE (sym); |
| 758 | |
| 759 | yylval.tval = type; |
| 760 | *token_type = TYPENAME; |
| 761 | return 0; |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | NotType: |
| 766 | if (nsyms == 1) |
| 767 | { |
| 768 | *token_type = NAME; |
| 769 | yylval.ssym.sym = syms[0].sym; |
| 770 | yylval.ssym.msym = NULL; |
| 771 | yylval.ssym.block = syms[0].block; |
| 772 | return segments; |
| 773 | } |
| 774 | else if (nsyms == 0) { |
| 775 | int i; |
| 776 | yylval.ssym.msym = ada_lookup_simple_minsym (name); |
| 777 | if (yylval.ssym.msym != NULL) |
| 778 | { |
| 779 | yylval.ssym.sym = NULL; |
| 780 | yylval.ssym.block = NULL; |
| 781 | *token_type = NAME; |
| 782 | return segments; |
| 783 | } |
| 784 | |
| 785 | if (segments == 0 |
| 786 | && strncmp (name, "standard__", sizeof ("standard__") - 1) == 0) |
| 787 | error ("No definition of \"%s\" found.", err_name); |
| 788 | |
| 789 | for (i = yylval.ssym.stoken.length - 1; i > 0; i -= 1) |
| 790 | { |
| 791 | if (name[i] == '.') |
| 792 | { |
| 793 | name[i] = '\0'; |
| 794 | yylval.ssym.stoken.length = i; |
| 795 | break; |
| 796 | } |
| 797 | else if (name[i] == '_' && name[i-1] == '_') |
| 798 | { |
| 799 | i -= 1; |
| 800 | name[i] = '\0'; |
| 801 | yylval.ssym.stoken.length = i; |
| 802 | break; |
| 803 | } |
| 804 | } |
| 805 | if (i <= 0) |
| 806 | { |
| 807 | if (!have_full_symbols () && !have_partial_symbols () |
| 808 | && left_block_context == NULL) |
| 809 | error ("No symbol table is loaded. Use the \"file\" command."); |
| 810 | if (left_block_context == NULL) |
| 811 | error ("No definition of \"%s\" in current context.", |
| 812 | err_name); |
| 813 | else |
| 814 | error ("No definition of \"%s\" in specified context.", |
| 815 | err_name); |
| 816 | } |
| 817 | } |
| 818 | else |
| 819 | { |
| 820 | *token_type = NAME; |
| 821 | yylval.ssym.sym = NULL; |
| 822 | yylval.ssym.msym = NULL; |
| 823 | if (left_block_context == NULL) |
| 824 | yylval.ssym.block = expression_context_block; |
| 825 | else |
| 826 | yylval.ssym.block = left_block_context; |
| 827 | return segments; |
| 828 | } |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | /* Returns the position within STR of the '.' in a |
| 833 | '.{WHITE}*all' component of a dotted name, or -1 if there is none. */ |
| 834 | static int |
| 835 | find_dot_all (const char *str) |
| 836 | { |
| 837 | int i; |
| 838 | for (i = 0; str[i] != '\000'; i += 1) |
| 839 | { |
| 840 | if (str[i] == '.') |
| 841 | { |
| 842 | int i0 = i; |
| 843 | do |
| 844 | i += 1; |
| 845 | while (isspace (str[i])); |
| 846 | if (strcmp (str+i, "all") == 0 |
| 847 | && ! isalnum (str[i+3]) && str[i+3] != '_') |
| 848 | return i0; |
| 849 | } |
| 850 | } |
| 851 | return -1; |
| 852 | } |
| 853 | |
| 854 | /* Returns non-zero iff string SUBSEQ matches a subsequence of STR, ignoring |
| 855 | case. */ |
| 856 | |
| 857 | static int |
| 858 | subseqMatch (const char *subseq, const char *str) |
| 859 | { |
| 860 | if (subseq[0] == '\0') |
| 861 | return 1; |
| 862 | else if (str[0] == '\0') |
| 863 | return 0; |
| 864 | else if (tolower (subseq[0]) == tolower (str[0])) |
| 865 | return subseqMatch (subseq+1, str+1) || subseqMatch (subseq, str+1); |
| 866 | else |
| 867 | return subseqMatch (subseq, str+1); |
| 868 | } |
| 869 | |
| 870 | |
| 871 | static struct { const char *name; int code; } |
| 872 | attributes[] = { |
| 873 | { "address", TICK_ADDRESS }, |
| 874 | { "unchecked_access", TICK_ACCESS }, |
| 875 | { "unrestricted_access", TICK_ACCESS }, |
| 876 | { "access", TICK_ACCESS }, |
| 877 | { "first", TICK_FIRST }, |
| 878 | { "last", TICK_LAST }, |
| 879 | { "length", TICK_LENGTH }, |
| 880 | { "max", TICK_MAX }, |
| 881 | { "min", TICK_MIN }, |
| 882 | { "modulus", TICK_MODULUS }, |
| 883 | { "pos", TICK_POS }, |
| 884 | { "range", TICK_RANGE }, |
| 885 | { "size", TICK_SIZE }, |
| 886 | { "tag", TICK_TAG }, |
| 887 | { "val", TICK_VAL }, |
| 888 | { NULL, -1 } |
| 889 | }; |
| 890 | |
| 891 | /* Return the syntactic code corresponding to the attribute name or |
| 892 | abbreviation STR. */ |
| 893 | |
| 894 | static int |
| 895 | processAttribute (const char *str) |
| 896 | { |
| 897 | int i, k; |
| 898 | |
| 899 | for (i = 0; attributes[i].code != -1; i += 1) |
| 900 | if (strcasecmp (str, attributes[i].name) == 0) |
| 901 | return attributes[i].code; |
| 902 | |
| 903 | for (i = 0, k = -1; attributes[i].code != -1; i += 1) |
| 904 | if (subseqMatch (str, attributes[i].name)) |
| 905 | { |
| 906 | if (k == -1) |
| 907 | k = i; |
| 908 | else |
| 909 | error ("ambiguous attribute name: `%s'", str); |
| 910 | } |
| 911 | if (k == -1) |
| 912 | error ("unrecognized attribute: `%s'", str); |
| 913 | |
| 914 | return attributes[k].code; |
| 915 | } |
| 916 | |
| 917 | int |
| 918 | yywrap(void) |
| 919 | { |
| 920 | return 1; |
| 921 | } |
| 922 | |
| 923 | /* Dummy definition to suppress warnings about unused static definitions. */ |
| 924 | typedef void (*dummy_function) (); |
| 925 | dummy_function ada_flex_use[] = |
| 926 | { |
| 927 | (dummy_function) yyunput |
| 928 | }; |