| 1 | /* Support for printing Ada types for GDB, the GNU debugger. |
| 2 | Copyright (C) 1986-2019 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 | #include "defs.h" |
| 20 | #include "bfd.h" /* Binary File Description */ |
| 21 | #include "gdbtypes.h" |
| 22 | #include "value.h" |
| 23 | #include "c-lang.h" |
| 24 | #include "cli/cli-style.h" |
| 25 | #include "typeprint.h" |
| 26 | #include "target-float.h" |
| 27 | #include "ada-lang.h" |
| 28 | #include <ctype.h> |
| 29 | |
| 30 | static int print_selected_record_field_types (struct type *, struct type *, |
| 31 | int, int, |
| 32 | struct ui_file *, int, int, |
| 33 | const struct type_print_options *); |
| 34 | |
| 35 | static int print_record_field_types (struct type *, struct type *, |
| 36 | struct ui_file *, int, int, |
| 37 | const struct type_print_options *); |
| 38 | \f |
| 39 | |
| 40 | |
| 41 | static char *name_buffer; |
| 42 | static int name_buffer_len; |
| 43 | |
| 44 | /* The (decoded) Ada name of TYPE. This value persists until the |
| 45 | next call. */ |
| 46 | |
| 47 | static char * |
| 48 | decoded_type_name (struct type *type) |
| 49 | { |
| 50 | if (ada_type_name (type) == NULL) |
| 51 | return NULL; |
| 52 | else |
| 53 | { |
| 54 | const char *raw_name = ada_type_name (type); |
| 55 | char *s, *q; |
| 56 | |
| 57 | if (name_buffer == NULL || name_buffer_len <= strlen (raw_name)) |
| 58 | { |
| 59 | name_buffer_len = 16 + 2 * strlen (raw_name); |
| 60 | name_buffer = (char *) xrealloc (name_buffer, name_buffer_len); |
| 61 | } |
| 62 | strcpy (name_buffer, raw_name); |
| 63 | |
| 64 | s = (char *) strstr (name_buffer, "___"); |
| 65 | if (s != NULL) |
| 66 | *s = '\0'; |
| 67 | |
| 68 | s = name_buffer + strlen (name_buffer) - 1; |
| 69 | while (s > name_buffer && (s[0] != '_' || s[-1] != '_')) |
| 70 | s -= 1; |
| 71 | |
| 72 | if (s == name_buffer) |
| 73 | return name_buffer; |
| 74 | |
| 75 | if (!islower (s[1])) |
| 76 | return NULL; |
| 77 | |
| 78 | for (s = q = name_buffer; *s != '\0'; q += 1) |
| 79 | { |
| 80 | if (s[0] == '_' && s[1] == '_') |
| 81 | { |
| 82 | *q = '.'; |
| 83 | s += 2; |
| 84 | } |
| 85 | else |
| 86 | { |
| 87 | *q = *s; |
| 88 | s += 1; |
| 89 | } |
| 90 | } |
| 91 | *q = '\0'; |
| 92 | return name_buffer; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | /* Return nonzero if TYPE is a subrange type, and its bounds |
| 97 | are identical to the bounds of its subtype. */ |
| 98 | |
| 99 | static int |
| 100 | type_is_full_subrange_of_target_type (struct type *type) |
| 101 | { |
| 102 | struct type *subtype; |
| 103 | |
| 104 | if (TYPE_CODE (type) != TYPE_CODE_RANGE) |
| 105 | return 0; |
| 106 | |
| 107 | subtype = TYPE_TARGET_TYPE (type); |
| 108 | if (subtype == NULL) |
| 109 | return 0; |
| 110 | |
| 111 | if (is_dynamic_type (type)) |
| 112 | return 0; |
| 113 | |
| 114 | if (ada_discrete_type_low_bound (type) |
| 115 | != ada_discrete_type_low_bound (subtype)) |
| 116 | return 0; |
| 117 | |
| 118 | if (ada_discrete_type_high_bound (type) |
| 119 | != ada_discrete_type_high_bound (subtype)) |
| 120 | return 0; |
| 121 | |
| 122 | return 1; |
| 123 | } |
| 124 | |
| 125 | /* Print TYPE on STREAM, preferably as a range if BOUNDS_PREFERED_P |
| 126 | is nonzero. */ |
| 127 | |
| 128 | static void |
| 129 | print_range (struct type *type, struct ui_file *stream, |
| 130 | int bounds_prefered_p) |
| 131 | { |
| 132 | if (!bounds_prefered_p) |
| 133 | { |
| 134 | /* Try stripping all TYPE_CODE_RANGE layers whose bounds |
| 135 | are identical to the bounds of their subtype. When |
| 136 | the bounds of both types match, it can allow us to |
| 137 | print a range using the name of its base type, which |
| 138 | is easier to read. For instance, we would print... |
| 139 | |
| 140 | array (character) of ... |
| 141 | |
| 142 | ... instead of... |
| 143 | |
| 144 | array ('["00"]' .. '["ff"]') of ... */ |
| 145 | while (type_is_full_subrange_of_target_type (type)) |
| 146 | type = TYPE_TARGET_TYPE (type); |
| 147 | } |
| 148 | |
| 149 | switch (TYPE_CODE (type)) |
| 150 | { |
| 151 | case TYPE_CODE_RANGE: |
| 152 | case TYPE_CODE_ENUM: |
| 153 | { |
| 154 | LONGEST lo = 0, hi = 0; /* init for gcc -Wall */ |
| 155 | int got_error = 0; |
| 156 | |
| 157 | try |
| 158 | { |
| 159 | lo = ada_discrete_type_low_bound (type); |
| 160 | hi = ada_discrete_type_high_bound (type); |
| 161 | } |
| 162 | catch (const gdb_exception_error &e) |
| 163 | { |
| 164 | /* This can happen when the range is dynamic. Sometimes, |
| 165 | resolving dynamic property values requires us to have |
| 166 | access to an actual object, which is not available |
| 167 | when the user is using the "ptype" command on a type. |
| 168 | Print the range as an unbounded range. */ |
| 169 | fprintf_filtered (stream, "<>"); |
| 170 | got_error = 1; |
| 171 | } |
| 172 | |
| 173 | if (!got_error) |
| 174 | { |
| 175 | ada_print_scalar (type, lo, stream); |
| 176 | fprintf_filtered (stream, " .. "); |
| 177 | ada_print_scalar (type, hi, stream); |
| 178 | } |
| 179 | } |
| 180 | break; |
| 181 | default: |
| 182 | fprintf_filtered (stream, "%.*s", |
| 183 | ada_name_prefix_len (TYPE_NAME (type)), |
| 184 | TYPE_NAME (type)); |
| 185 | break; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | /* Print the number or discriminant bound at BOUNDS+*N on STREAM, and |
| 190 | set *N past the bound and its delimiter, if any. */ |
| 191 | |
| 192 | static void |
| 193 | print_range_bound (struct type *type, const char *bounds, int *n, |
| 194 | struct ui_file *stream) |
| 195 | { |
| 196 | LONGEST B; |
| 197 | |
| 198 | if (ada_scan_number (bounds, *n, &B, n)) |
| 199 | { |
| 200 | /* STABS decodes all range types which bounds are 0 .. -1 as |
| 201 | unsigned integers (ie. the type code is TYPE_CODE_INT, not |
| 202 | TYPE_CODE_RANGE). Unfortunately, ada_print_scalar() relies |
| 203 | on the unsigned flag to determine whether the bound should |
| 204 | be printed as a signed or an unsigned value. This causes |
| 205 | the upper bound of the 0 .. -1 range types to be printed as |
| 206 | a very large unsigned number instead of -1. |
| 207 | To workaround this stabs deficiency, we replace the TYPE by NULL |
| 208 | to indicate default output when we detect that the bound is negative, |
| 209 | and the type is a TYPE_CODE_INT. The bound is negative when |
| 210 | 'm' is the last character of the number scanned in BOUNDS. */ |
| 211 | if (bounds[*n - 1] == 'm' && TYPE_CODE (type) == TYPE_CODE_INT) |
| 212 | type = NULL; |
| 213 | ada_print_scalar (type, B, stream); |
| 214 | if (bounds[*n] == '_') |
| 215 | *n += 2; |
| 216 | } |
| 217 | else |
| 218 | { |
| 219 | int bound_len; |
| 220 | const char *bound = bounds + *n; |
| 221 | const char *pend; |
| 222 | |
| 223 | pend = strstr (bound, "__"); |
| 224 | if (pend == NULL) |
| 225 | *n += bound_len = strlen (bound); |
| 226 | else |
| 227 | { |
| 228 | bound_len = pend - bound; |
| 229 | *n += bound_len + 2; |
| 230 | } |
| 231 | fprintf_filtered (stream, "%.*s", bound_len, bound); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | /* Assuming NAME[0 .. NAME_LEN-1] is the name of a range type, print |
| 236 | the value (if found) of the bound indicated by SUFFIX ("___L" or |
| 237 | "___U") according to the ___XD conventions. */ |
| 238 | |
| 239 | static void |
| 240 | print_dynamic_range_bound (struct type *type, const char *name, int name_len, |
| 241 | const char *suffix, struct ui_file *stream) |
| 242 | { |
| 243 | LONGEST B; |
| 244 | std::string name_buf (name, name_len); |
| 245 | name_buf += suffix; |
| 246 | |
| 247 | if (get_int_var_value (name_buf.c_str (), B)) |
| 248 | ada_print_scalar (type, B, stream); |
| 249 | else |
| 250 | fprintf_filtered (stream, "?"); |
| 251 | } |
| 252 | |
| 253 | /* Print RAW_TYPE as a range type, using any bound information |
| 254 | following the GNAT encoding (if available). |
| 255 | |
| 256 | If BOUNDS_PREFERED_P is nonzero, force the printing of the range |
| 257 | using its bounds. Otherwise, try printing the range without |
| 258 | printing the value of the bounds, if possible (this is only |
| 259 | considered a hint, not a guaranty). */ |
| 260 | |
| 261 | static void |
| 262 | print_range_type (struct type *raw_type, struct ui_file *stream, |
| 263 | int bounds_prefered_p) |
| 264 | { |
| 265 | const char *name; |
| 266 | struct type *base_type; |
| 267 | const char *subtype_info; |
| 268 | |
| 269 | gdb_assert (raw_type != NULL); |
| 270 | name = TYPE_NAME (raw_type); |
| 271 | gdb_assert (name != NULL); |
| 272 | |
| 273 | if (TYPE_CODE (raw_type) == TYPE_CODE_RANGE) |
| 274 | base_type = TYPE_TARGET_TYPE (raw_type); |
| 275 | else |
| 276 | base_type = raw_type; |
| 277 | |
| 278 | subtype_info = strstr (name, "___XD"); |
| 279 | if (subtype_info == NULL) |
| 280 | print_range (raw_type, stream, bounds_prefered_p); |
| 281 | else |
| 282 | { |
| 283 | int prefix_len = subtype_info - name; |
| 284 | const char *bounds_str; |
| 285 | int n; |
| 286 | |
| 287 | subtype_info += 5; |
| 288 | bounds_str = strchr (subtype_info, '_'); |
| 289 | n = 1; |
| 290 | |
| 291 | if (*subtype_info == 'L') |
| 292 | { |
| 293 | print_range_bound (base_type, bounds_str, &n, stream); |
| 294 | subtype_info += 1; |
| 295 | } |
| 296 | else |
| 297 | print_dynamic_range_bound (base_type, name, prefix_len, "___L", |
| 298 | stream); |
| 299 | |
| 300 | fprintf_filtered (stream, " .. "); |
| 301 | |
| 302 | if (*subtype_info == 'U') |
| 303 | print_range_bound (base_type, bounds_str, &n, stream); |
| 304 | else |
| 305 | print_dynamic_range_bound (base_type, name, prefix_len, "___U", |
| 306 | stream); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | /* Print enumerated type TYPE on STREAM. */ |
| 311 | |
| 312 | static void |
| 313 | print_enum_type (struct type *type, struct ui_file *stream) |
| 314 | { |
| 315 | int len = TYPE_NFIELDS (type); |
| 316 | int i; |
| 317 | LONGEST lastval; |
| 318 | |
| 319 | fprintf_filtered (stream, "("); |
| 320 | wrap_here (" "); |
| 321 | |
| 322 | lastval = 0; |
| 323 | for (i = 0; i < len; i++) |
| 324 | { |
| 325 | QUIT; |
| 326 | if (i) |
| 327 | fprintf_filtered (stream, ", "); |
| 328 | wrap_here (" "); |
| 329 | fputs_filtered (ada_enum_name (TYPE_FIELD_NAME (type, i)), stream); |
| 330 | if (lastval != TYPE_FIELD_ENUMVAL (type, i)) |
| 331 | { |
| 332 | fprintf_filtered (stream, " => %s", |
| 333 | plongest (TYPE_FIELD_ENUMVAL (type, i))); |
| 334 | lastval = TYPE_FIELD_ENUMVAL (type, i); |
| 335 | } |
| 336 | lastval += 1; |
| 337 | } |
| 338 | fprintf_filtered (stream, ")"); |
| 339 | } |
| 340 | |
| 341 | /* Print representation of Ada fixed-point type TYPE on STREAM. */ |
| 342 | |
| 343 | static void |
| 344 | print_fixed_point_type (struct type *type, struct ui_file *stream) |
| 345 | { |
| 346 | struct value *delta = ada_delta (type); |
| 347 | struct value *small = ada_scaling_factor (type); |
| 348 | |
| 349 | if (delta == nullptr) |
| 350 | fprintf_filtered (stream, "delta ??"); |
| 351 | else |
| 352 | { |
| 353 | std::string str; |
| 354 | str = target_float_to_string (value_contents (delta), |
| 355 | value_type (delta), "%g"); |
| 356 | fprintf_filtered (stream, "delta %s", str.c_str()); |
| 357 | if (!value_equal (delta, small)) |
| 358 | { |
| 359 | str = target_float_to_string (value_contents (small), |
| 360 | value_type (small), "%g"); |
| 361 | fprintf_filtered (stream, " <'small = %s>", str.c_str()); |
| 362 | } |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | /* Print simple (constrained) array type TYPE on STREAM. LEVEL is the |
| 367 | recursion (indentation) level, in case the element type itself has |
| 368 | nested structure, and SHOW is the number of levels of internal |
| 369 | structure to show (see ada_print_type). */ |
| 370 | |
| 371 | static void |
| 372 | print_array_type (struct type *type, struct ui_file *stream, int show, |
| 373 | int level, const struct type_print_options *flags) |
| 374 | { |
| 375 | int bitsize; |
| 376 | int n_indices; |
| 377 | struct type *elt_type = NULL; |
| 378 | |
| 379 | if (ada_is_constrained_packed_array_type (type)) |
| 380 | type = ada_coerce_to_simple_array_type (type); |
| 381 | |
| 382 | bitsize = 0; |
| 383 | fprintf_filtered (stream, "array ("); |
| 384 | |
| 385 | if (type == NULL) |
| 386 | { |
| 387 | fprintf_styled (stream, metadata_style.style (), |
| 388 | _("<undecipherable array type>")); |
| 389 | return; |
| 390 | } |
| 391 | |
| 392 | n_indices = -1; |
| 393 | if (ada_is_simple_array_type (type)) |
| 394 | { |
| 395 | struct type *range_desc_type; |
| 396 | struct type *arr_type; |
| 397 | |
| 398 | range_desc_type = ada_find_parallel_type (type, "___XA"); |
| 399 | ada_fixup_array_indexes_type (range_desc_type); |
| 400 | |
| 401 | bitsize = 0; |
| 402 | if (range_desc_type == NULL) |
| 403 | { |
| 404 | for (arr_type = type; TYPE_CODE (arr_type) == TYPE_CODE_ARRAY; |
| 405 | arr_type = TYPE_TARGET_TYPE (arr_type)) |
| 406 | { |
| 407 | if (arr_type != type) |
| 408 | fprintf_filtered (stream, ", "); |
| 409 | print_range (TYPE_INDEX_TYPE (arr_type), stream, |
| 410 | 0 /* bounds_prefered_p */); |
| 411 | if (TYPE_FIELD_BITSIZE (arr_type, 0) > 0) |
| 412 | bitsize = TYPE_FIELD_BITSIZE (arr_type, 0); |
| 413 | } |
| 414 | } |
| 415 | else |
| 416 | { |
| 417 | int k; |
| 418 | |
| 419 | n_indices = TYPE_NFIELDS (range_desc_type); |
| 420 | for (k = 0, arr_type = type; |
| 421 | k < n_indices; |
| 422 | k += 1, arr_type = TYPE_TARGET_TYPE (arr_type)) |
| 423 | { |
| 424 | if (k > 0) |
| 425 | fprintf_filtered (stream, ", "); |
| 426 | print_range_type (TYPE_FIELD_TYPE (range_desc_type, k), |
| 427 | stream, 0 /* bounds_prefered_p */); |
| 428 | if (TYPE_FIELD_BITSIZE (arr_type, 0) > 0) |
| 429 | bitsize = TYPE_FIELD_BITSIZE (arr_type, 0); |
| 430 | } |
| 431 | } |
| 432 | } |
| 433 | else |
| 434 | { |
| 435 | int i, i0; |
| 436 | |
| 437 | for (i = i0 = ada_array_arity (type); i > 0; i -= 1) |
| 438 | fprintf_filtered (stream, "%s<>", i == i0 ? "" : ", "); |
| 439 | } |
| 440 | |
| 441 | elt_type = ada_array_element_type (type, n_indices); |
| 442 | fprintf_filtered (stream, ") of "); |
| 443 | wrap_here (""); |
| 444 | ada_print_type (elt_type, "", stream, show == 0 ? 0 : show - 1, level + 1, |
| 445 | flags); |
| 446 | /* Arrays with variable-length elements are never bit-packed in practice but |
| 447 | compilers have to describe their stride so that we can properly fetch |
| 448 | individual elements. Do not say the array is packed in this case. */ |
| 449 | if (bitsize > 0 && !is_dynamic_type (elt_type)) |
| 450 | fprintf_filtered (stream, " <packed: %d-bit elements>", bitsize); |
| 451 | } |
| 452 | |
| 453 | /* Print the choices encoded by field FIELD_NUM of variant-part TYPE on |
| 454 | STREAM, assuming that VAL_TYPE (if non-NULL) is the type of the |
| 455 | values. Return non-zero if the field is an encoding of |
| 456 | discriminant values, as in a standard variant record, and 0 if the |
| 457 | field is not so encoded (as happens with single-component variants |
| 458 | in types annotated with pragma Unchecked_Variant). */ |
| 459 | |
| 460 | static int |
| 461 | print_choices (struct type *type, int field_num, struct ui_file *stream, |
| 462 | struct type *val_type) |
| 463 | { |
| 464 | int have_output; |
| 465 | int p; |
| 466 | const char *name = TYPE_FIELD_NAME (type, field_num); |
| 467 | |
| 468 | have_output = 0; |
| 469 | |
| 470 | /* Skip over leading 'V': NOTE soon to be obsolete. */ |
| 471 | if (name[0] == 'V') |
| 472 | { |
| 473 | if (!ada_scan_number (name, 1, NULL, &p)) |
| 474 | goto Huh; |
| 475 | } |
| 476 | else |
| 477 | p = 0; |
| 478 | |
| 479 | while (1) |
| 480 | { |
| 481 | switch (name[p]) |
| 482 | { |
| 483 | default: |
| 484 | goto Huh; |
| 485 | case '_': |
| 486 | case '\0': |
| 487 | fprintf_filtered (stream, " =>"); |
| 488 | return 1; |
| 489 | case 'S': |
| 490 | case 'R': |
| 491 | case 'O': |
| 492 | if (have_output) |
| 493 | fprintf_filtered (stream, " | "); |
| 494 | have_output = 1; |
| 495 | break; |
| 496 | } |
| 497 | |
| 498 | switch (name[p]) |
| 499 | { |
| 500 | case 'S': |
| 501 | { |
| 502 | LONGEST W; |
| 503 | |
| 504 | if (!ada_scan_number (name, p + 1, &W, &p)) |
| 505 | goto Huh; |
| 506 | ada_print_scalar (val_type, W, stream); |
| 507 | break; |
| 508 | } |
| 509 | case 'R': |
| 510 | { |
| 511 | LONGEST L, U; |
| 512 | |
| 513 | if (!ada_scan_number (name, p + 1, &L, &p) |
| 514 | || name[p] != 'T' || !ada_scan_number (name, p + 1, &U, &p)) |
| 515 | goto Huh; |
| 516 | ada_print_scalar (val_type, L, stream); |
| 517 | fprintf_filtered (stream, " .. "); |
| 518 | ada_print_scalar (val_type, U, stream); |
| 519 | break; |
| 520 | } |
| 521 | case 'O': |
| 522 | fprintf_filtered (stream, "others"); |
| 523 | p += 1; |
| 524 | break; |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | Huh: |
| 529 | fprintf_filtered (stream, "? =>"); |
| 530 | return 0; |
| 531 | } |
| 532 | |
| 533 | /* Assuming that field FIELD_NUM of TYPE represents variants whose |
| 534 | discriminant is contained in OUTER_TYPE, print its components on STREAM. |
| 535 | LEVEL is the recursion (indentation) level, in case any of the fields |
| 536 | themselves have nested structure, and SHOW is the number of levels of |
| 537 | internal structure to show (see ada_print_type). For this purpose, |
| 538 | fields nested in a variant part are taken to be at the same level as |
| 539 | the fields immediately outside the variant part. */ |
| 540 | |
| 541 | static void |
| 542 | print_variant_clauses (struct type *type, int field_num, |
| 543 | struct type *outer_type, struct ui_file *stream, |
| 544 | int show, int level, |
| 545 | const struct type_print_options *flags) |
| 546 | { |
| 547 | int i; |
| 548 | struct type *var_type, *par_type; |
| 549 | struct type *discr_type; |
| 550 | |
| 551 | var_type = TYPE_FIELD_TYPE (type, field_num); |
| 552 | discr_type = ada_variant_discrim_type (var_type, outer_type); |
| 553 | |
| 554 | if (TYPE_CODE (var_type) == TYPE_CODE_PTR) |
| 555 | { |
| 556 | var_type = TYPE_TARGET_TYPE (var_type); |
| 557 | if (var_type == NULL || TYPE_CODE (var_type) != TYPE_CODE_UNION) |
| 558 | return; |
| 559 | } |
| 560 | |
| 561 | par_type = ada_find_parallel_type (var_type, "___XVU"); |
| 562 | if (par_type != NULL) |
| 563 | var_type = par_type; |
| 564 | |
| 565 | for (i = 0; i < TYPE_NFIELDS (var_type); i += 1) |
| 566 | { |
| 567 | fprintf_filtered (stream, "\n%*swhen ", level + 4, ""); |
| 568 | if (print_choices (var_type, i, stream, discr_type)) |
| 569 | { |
| 570 | if (print_record_field_types (TYPE_FIELD_TYPE (var_type, i), |
| 571 | outer_type, stream, show, level + 4, |
| 572 | flags) |
| 573 | <= 0) |
| 574 | fprintf_filtered (stream, " null;"); |
| 575 | } |
| 576 | else |
| 577 | print_selected_record_field_types (var_type, outer_type, i, i, |
| 578 | stream, show, level + 4, flags); |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | /* Assuming that field FIELD_NUM of TYPE is a variant part whose |
| 583 | discriminants are contained in OUTER_TYPE, print a description of it |
| 584 | on STREAM. LEVEL is the recursion (indentation) level, in case any of |
| 585 | the fields themselves have nested structure, and SHOW is the number of |
| 586 | levels of internal structure to show (see ada_print_type). For this |
| 587 | purpose, fields nested in a variant part are taken to be at the same |
| 588 | level as the fields immediately outside the variant part. */ |
| 589 | |
| 590 | static void |
| 591 | print_variant_part (struct type *type, int field_num, struct type *outer_type, |
| 592 | struct ui_file *stream, int show, int level, |
| 593 | const struct type_print_options *flags) |
| 594 | { |
| 595 | const char *variant |
| 596 | = ada_variant_discrim_name (TYPE_FIELD_TYPE (type, field_num)); |
| 597 | if (*variant == '\0') |
| 598 | variant = "?"; |
| 599 | |
| 600 | fprintf_filtered (stream, "\n%*scase %s is", level + 4, "", variant); |
| 601 | print_variant_clauses (type, field_num, outer_type, stream, show, |
| 602 | level + 4, flags); |
| 603 | fprintf_filtered (stream, "\n%*send case;", level + 4, ""); |
| 604 | } |
| 605 | |
| 606 | /* Print a description on STREAM of the fields FLD0 through FLD1 in |
| 607 | record or union type TYPE, whose discriminants are in OUTER_TYPE. |
| 608 | LEVEL is the recursion (indentation) level, in case any of the |
| 609 | fields themselves have nested structure, and SHOW is the number of |
| 610 | levels of internal structure to show (see ada_print_type). Does |
| 611 | not print parent type information of TYPE. Returns 0 if no fields |
| 612 | printed, -1 for an incomplete type, else > 0. Prints each field |
| 613 | beginning on a new line, but does not put a new line at end. */ |
| 614 | |
| 615 | static int |
| 616 | print_selected_record_field_types (struct type *type, struct type *outer_type, |
| 617 | int fld0, int fld1, |
| 618 | struct ui_file *stream, int show, int level, |
| 619 | const struct type_print_options *flags) |
| 620 | { |
| 621 | int i, flds; |
| 622 | |
| 623 | flds = 0; |
| 624 | |
| 625 | if (fld0 > fld1 && TYPE_STUB (type)) |
| 626 | return -1; |
| 627 | |
| 628 | for (i = fld0; i <= fld1; i += 1) |
| 629 | { |
| 630 | QUIT; |
| 631 | |
| 632 | if (ada_is_parent_field (type, i) || ada_is_ignored_field (type, i)) |
| 633 | ; |
| 634 | else if (ada_is_wrapper_field (type, i)) |
| 635 | flds += print_record_field_types (TYPE_FIELD_TYPE (type, i), type, |
| 636 | stream, show, level, flags); |
| 637 | else if (ada_is_variant_part (type, i)) |
| 638 | { |
| 639 | print_variant_part (type, i, outer_type, stream, show, level, flags); |
| 640 | flds = 1; |
| 641 | } |
| 642 | else |
| 643 | { |
| 644 | flds += 1; |
| 645 | fprintf_filtered (stream, "\n%*s", level + 4, ""); |
| 646 | ada_print_type (TYPE_FIELD_TYPE (type, i), |
| 647 | TYPE_FIELD_NAME (type, i), |
| 648 | stream, show - 1, level + 4, flags); |
| 649 | fprintf_filtered (stream, ";"); |
| 650 | } |
| 651 | } |
| 652 | |
| 653 | return flds; |
| 654 | } |
| 655 | |
| 656 | /* Print a description on STREAM of all fields of record or union type |
| 657 | TYPE, as for print_selected_record_field_types, above. */ |
| 658 | |
| 659 | static int |
| 660 | print_record_field_types (struct type *type, struct type *outer_type, |
| 661 | struct ui_file *stream, int show, int level, |
| 662 | const struct type_print_options *flags) |
| 663 | { |
| 664 | return print_selected_record_field_types (type, outer_type, |
| 665 | 0, TYPE_NFIELDS (type) - 1, |
| 666 | stream, show, level, flags); |
| 667 | } |
| 668 | |
| 669 | |
| 670 | /* Print record type TYPE on STREAM. LEVEL is the recursion (indentation) |
| 671 | level, in case the element type itself has nested structure, and SHOW is |
| 672 | the number of levels of internal structure to show (see ada_print_type). */ |
| 673 | |
| 674 | static void |
| 675 | print_record_type (struct type *type0, struct ui_file *stream, int show, |
| 676 | int level, const struct type_print_options *flags) |
| 677 | { |
| 678 | struct type *parent_type; |
| 679 | struct type *type; |
| 680 | |
| 681 | type = ada_find_parallel_type (type0, "___XVE"); |
| 682 | if (type == NULL) |
| 683 | type = type0; |
| 684 | |
| 685 | parent_type = ada_parent_type (type); |
| 686 | if (ada_type_name (parent_type) != NULL) |
| 687 | { |
| 688 | const char *parent_name = decoded_type_name (parent_type); |
| 689 | |
| 690 | /* If we fail to decode the parent type name, then use the parent |
| 691 | type name as is. Not pretty, but should never happen except |
| 692 | when the debugging info is incomplete or incorrect. This |
| 693 | prevents a crash trying to print a NULL pointer. */ |
| 694 | if (parent_name == NULL) |
| 695 | parent_name = ada_type_name (parent_type); |
| 696 | fprintf_filtered (stream, "new %s with record", parent_name); |
| 697 | } |
| 698 | else if (parent_type == NULL && ada_is_tagged_type (type, 0)) |
| 699 | fprintf_filtered (stream, "tagged record"); |
| 700 | else |
| 701 | fprintf_filtered (stream, "record"); |
| 702 | |
| 703 | if (show < 0) |
| 704 | fprintf_filtered (stream, " ... end record"); |
| 705 | else |
| 706 | { |
| 707 | int flds; |
| 708 | |
| 709 | flds = 0; |
| 710 | if (parent_type != NULL && ada_type_name (parent_type) == NULL) |
| 711 | flds += print_record_field_types (parent_type, parent_type, |
| 712 | stream, show, level, flags); |
| 713 | flds += print_record_field_types (type, type, stream, show, level, |
| 714 | flags); |
| 715 | |
| 716 | if (flds > 0) |
| 717 | fprintf_filtered (stream, "\n%*send record", level, ""); |
| 718 | else if (flds < 0) |
| 719 | fprintf_filtered (stream, _(" <incomplete type> end record")); |
| 720 | else |
| 721 | fprintf_filtered (stream, " null; end record"); |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | /* Print the unchecked union type TYPE in something resembling Ada |
| 726 | format on STREAM. LEVEL is the recursion (indentation) level |
| 727 | in case the element type itself has nested structure, and SHOW is the |
| 728 | number of levels of internal structure to show (see ada_print_type). */ |
| 729 | static void |
| 730 | print_unchecked_union_type (struct type *type, struct ui_file *stream, |
| 731 | int show, int level, |
| 732 | const struct type_print_options *flags) |
| 733 | { |
| 734 | if (show < 0) |
| 735 | fprintf_filtered (stream, "record (?) is ... end record"); |
| 736 | else if (TYPE_NFIELDS (type) == 0) |
| 737 | fprintf_filtered (stream, "record (?) is null; end record"); |
| 738 | else |
| 739 | { |
| 740 | int i; |
| 741 | |
| 742 | fprintf_filtered (stream, "record (?) is\n%*scase ? is", level + 4, ""); |
| 743 | |
| 744 | for (i = 0; i < TYPE_NFIELDS (type); i += 1) |
| 745 | { |
| 746 | fprintf_filtered (stream, "\n%*swhen ? =>\n%*s", level + 8, "", |
| 747 | level + 12, ""); |
| 748 | ada_print_type (TYPE_FIELD_TYPE (type, i), |
| 749 | TYPE_FIELD_NAME (type, i), |
| 750 | stream, show - 1, level + 12, flags); |
| 751 | fprintf_filtered (stream, ";"); |
| 752 | } |
| 753 | |
| 754 | fprintf_filtered (stream, "\n%*send case;\n%*send record", |
| 755 | level + 4, "", level, ""); |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | |
| 760 | |
| 761 | /* Print function or procedure type TYPE on STREAM. Make it a header |
| 762 | for function or procedure NAME if NAME is not null. */ |
| 763 | |
| 764 | static void |
| 765 | print_func_type (struct type *type, struct ui_file *stream, const char *name, |
| 766 | const struct type_print_options *flags) |
| 767 | { |
| 768 | int i, len = TYPE_NFIELDS (type); |
| 769 | |
| 770 | if (TYPE_TARGET_TYPE (type) != NULL |
| 771 | && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_VOID) |
| 772 | fprintf_filtered (stream, "procedure"); |
| 773 | else |
| 774 | fprintf_filtered (stream, "function"); |
| 775 | |
| 776 | if (name != NULL && name[0] != '\0') |
| 777 | { |
| 778 | fputs_filtered (" ", stream); |
| 779 | fputs_styled (name, function_name_style.style (), stream); |
| 780 | } |
| 781 | |
| 782 | if (len > 0) |
| 783 | { |
| 784 | fprintf_filtered (stream, " ("); |
| 785 | for (i = 0; i < len; i += 1) |
| 786 | { |
| 787 | if (i > 0) |
| 788 | { |
| 789 | fputs_filtered ("; ", stream); |
| 790 | wrap_here (" "); |
| 791 | } |
| 792 | fprintf_filtered (stream, "a%d: ", i + 1); |
| 793 | ada_print_type (TYPE_FIELD_TYPE (type, i), "", stream, -1, 0, |
| 794 | flags); |
| 795 | } |
| 796 | fprintf_filtered (stream, ")"); |
| 797 | } |
| 798 | |
| 799 | if (TYPE_TARGET_TYPE (type) == NULL) |
| 800 | fprintf_filtered (stream, " return <unknown return type>"); |
| 801 | else if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID) |
| 802 | { |
| 803 | fprintf_filtered (stream, " return "); |
| 804 | ada_print_type (TYPE_TARGET_TYPE (type), "", stream, 0, 0, flags); |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | |
| 809 | /* Print a description of a type TYPE0. |
| 810 | Output goes to STREAM (via stdio). |
| 811 | If VARSTRING is a non-empty string, print as an Ada variable/field |
| 812 | declaration. |
| 813 | SHOW+1 is the maximum number of levels of internal type structure |
| 814 | to show (this applies to record types, enumerated types, and |
| 815 | array types). |
| 816 | SHOW is the number of levels of internal type structure to show |
| 817 | when there is a type name for the SHOWth deepest level (0th is |
| 818 | outer level). |
| 819 | When SHOW<0, no inner structure is shown. |
| 820 | LEVEL indicates level of recursion (for nested definitions). */ |
| 821 | |
| 822 | void |
| 823 | ada_print_type (struct type *type0, const char *varstring, |
| 824 | struct ui_file *stream, int show, int level, |
| 825 | const struct type_print_options *flags) |
| 826 | { |
| 827 | struct type *type = ada_check_typedef (ada_get_base_type (type0)); |
| 828 | char *type_name = decoded_type_name (type0); |
| 829 | int is_var_decl = (varstring != NULL && varstring[0] != '\0'); |
| 830 | |
| 831 | if (type == NULL) |
| 832 | { |
| 833 | if (is_var_decl) |
| 834 | fprintf_filtered (stream, "%.*s: ", |
| 835 | ada_name_prefix_len (varstring), varstring); |
| 836 | fprintf_styled (stream, metadata_style.style (), "<null type?>"); |
| 837 | return; |
| 838 | } |
| 839 | |
| 840 | if (show > 0) |
| 841 | type = ada_check_typedef (type); |
| 842 | |
| 843 | if (is_var_decl && TYPE_CODE (type) != TYPE_CODE_FUNC) |
| 844 | fprintf_filtered (stream, "%.*s: ", |
| 845 | ada_name_prefix_len (varstring), varstring); |
| 846 | |
| 847 | if (type_name != NULL && show <= 0 && !ada_is_aligner_type (type)) |
| 848 | { |
| 849 | fprintf_filtered (stream, "%.*s", |
| 850 | ada_name_prefix_len (type_name), type_name); |
| 851 | return; |
| 852 | } |
| 853 | |
| 854 | if (ada_is_aligner_type (type)) |
| 855 | ada_print_type (ada_aligned_type (type), "", stream, show, level, flags); |
| 856 | else if (ada_is_constrained_packed_array_type (type) |
| 857 | && TYPE_CODE (type) != TYPE_CODE_PTR) |
| 858 | print_array_type (type, stream, show, level, flags); |
| 859 | else |
| 860 | switch (TYPE_CODE (type)) |
| 861 | { |
| 862 | default: |
| 863 | fprintf_filtered (stream, "<"); |
| 864 | c_print_type (type, "", stream, show, level, flags); |
| 865 | fprintf_filtered (stream, ">"); |
| 866 | break; |
| 867 | case TYPE_CODE_PTR: |
| 868 | case TYPE_CODE_TYPEDEF: |
| 869 | fprintf_filtered (stream, "access "); |
| 870 | ada_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level, |
| 871 | flags); |
| 872 | break; |
| 873 | case TYPE_CODE_REF: |
| 874 | fprintf_filtered (stream, "<ref> "); |
| 875 | ada_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level, |
| 876 | flags); |
| 877 | break; |
| 878 | case TYPE_CODE_ARRAY: |
| 879 | print_array_type (type, stream, show, level, flags); |
| 880 | break; |
| 881 | case TYPE_CODE_BOOL: |
| 882 | fprintf_filtered (stream, "(false, true)"); |
| 883 | break; |
| 884 | case TYPE_CODE_INT: |
| 885 | if (ada_is_fixed_point_type (type)) |
| 886 | print_fixed_point_type (type, stream); |
| 887 | else |
| 888 | { |
| 889 | const char *name = ada_type_name (type); |
| 890 | |
| 891 | if (!ada_is_range_type_name (name)) |
| 892 | fprintf_styled (stream, metadata_style.style (), |
| 893 | _("<%s-byte integer>"), |
| 894 | pulongest (TYPE_LENGTH (type))); |
| 895 | else |
| 896 | { |
| 897 | fprintf_filtered (stream, "range "); |
| 898 | print_range_type (type, stream, 1 /* bounds_prefered_p */); |
| 899 | } |
| 900 | } |
| 901 | break; |
| 902 | case TYPE_CODE_RANGE: |
| 903 | if (ada_is_fixed_point_type (type)) |
| 904 | print_fixed_point_type (type, stream); |
| 905 | else if (ada_is_modular_type (type)) |
| 906 | fprintf_filtered (stream, "mod %s", |
| 907 | int_string (ada_modulus (type), 10, 0, 0, 1)); |
| 908 | else |
| 909 | { |
| 910 | fprintf_filtered (stream, "range "); |
| 911 | print_range (type, stream, 1 /* bounds_prefered_p */); |
| 912 | } |
| 913 | break; |
| 914 | case TYPE_CODE_FLT: |
| 915 | fprintf_styled (stream, metadata_style.style (), |
| 916 | _("<%s-byte float>"), |
| 917 | pulongest (TYPE_LENGTH (type))); |
| 918 | break; |
| 919 | case TYPE_CODE_ENUM: |
| 920 | if (show < 0) |
| 921 | fprintf_filtered (stream, "(...)"); |
| 922 | else |
| 923 | print_enum_type (type, stream); |
| 924 | break; |
| 925 | case TYPE_CODE_STRUCT: |
| 926 | if (ada_is_array_descriptor_type (type)) |
| 927 | print_array_type (type, stream, show, level, flags); |
| 928 | else if (ada_is_bogus_array_descriptor (type)) |
| 929 | fprintf_filtered (stream, |
| 930 | _("array (?) of ? (<mal-formed descriptor>)")); |
| 931 | else |
| 932 | print_record_type (type, stream, show, level, flags); |
| 933 | break; |
| 934 | case TYPE_CODE_UNION: |
| 935 | print_unchecked_union_type (type, stream, show, level, flags); |
| 936 | break; |
| 937 | case TYPE_CODE_FUNC: |
| 938 | print_func_type (type, stream, varstring, flags); |
| 939 | break; |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | /* Implement the la_print_typedef language method for Ada. */ |
| 944 | |
| 945 | void |
| 946 | ada_print_typedef (struct type *type, struct symbol *new_symbol, |
| 947 | struct ui_file *stream) |
| 948 | { |
| 949 | type = ada_check_typedef (type); |
| 950 | ada_print_type (type, "", stream, 0, 0, &type_print_raw_options); |
| 951 | } |