| File: | build/gcc/fortran/scanner.c |
| Warning: | line 908, column 4 Value stored to 'c' is never read |
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| 1 | /* Character scanner. |
| 2 | Copyright (C) 2000-2021 Free Software Foundation, Inc. |
| 3 | Contributed by Andy Vaught |
| 4 | |
| 5 | This file is part of GCC. |
| 6 | |
| 7 | GCC is free software; you can redistribute it and/or modify it under |
| 8 | the terms of the GNU General Public License as published by the Free |
| 9 | Software Foundation; either version 3, or (at your option) any later |
| 10 | version. |
| 11 | |
| 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| 13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 15 | for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GCC; see the file COPYING3. If not see |
| 19 | <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | /* Set of subroutines to (ultimately) return the next character to the |
| 22 | various matching subroutines. This file's job is to read files and |
| 23 | build up lines that are parsed by the parser. This means that we |
| 24 | handle continuation lines and "include" lines. |
| 25 | |
| 26 | The first thing the scanner does is to load an entire file into |
| 27 | memory. We load the entire file into memory for a couple reasons. |
| 28 | The first is that we want to be able to deal with nonseekable input |
| 29 | (pipes, stdin) and there is a lot of backing up involved during |
| 30 | parsing. |
| 31 | |
| 32 | The second is that we want to be able to print the locus of errors, |
| 33 | and an error on line 999999 could conflict with something on line |
| 34 | one. Given nonseekable input, we've got to store the whole thing. |
| 35 | |
| 36 | One thing that helps are the column truncation limits that give us |
| 37 | an upper bound on the size of individual lines. We don't store the |
| 38 | truncated stuff. |
| 39 | |
| 40 | From the scanner's viewpoint, the higher level subroutines ask for |
| 41 | new characters and do a lot of jumping backwards. */ |
| 42 | |
| 43 | #include "config.h" |
| 44 | #include "system.h" |
| 45 | #include "coretypes.h" |
| 46 | #include "gfortran.h" |
| 47 | #include "toplev.h" /* For set_src_pwd. */ |
| 48 | #include "debug.h" |
| 49 | #include "options.h" |
| 50 | #include "cpp.h" |
| 51 | #include "scanner.h" |
| 52 | |
| 53 | /* List of include file search directories. */ |
| 54 | gfc_directorylist *include_dirs, *intrinsic_modules_dirs; |
| 55 | |
| 56 | static gfc_file *file_head, *current_file; |
| 57 | |
| 58 | static int continue_flag, end_flag, gcc_attribute_flag; |
| 59 | /* If !$omp/!$acc occurred in current comment line. */ |
| 60 | static int openmp_flag, openacc_flag; |
| 61 | static int continue_count, continue_line; |
| 62 | static locus openmp_locus; |
| 63 | static locus openacc_locus; |
| 64 | static locus gcc_attribute_locus; |
| 65 | |
| 66 | gfc_source_form gfc_current_form; |
| 67 | static gfc_linebuf *line_head, *line_tail; |
| 68 | |
| 69 | locus gfc_current_locus; |
| 70 | const char *gfc_source_file; |
| 71 | static FILE *gfc_src_file; |
| 72 | static gfc_char_t *gfc_src_preprocessor_lines[2]; |
| 73 | |
| 74 | static struct gfc_file_change |
| 75 | { |
| 76 | const char *filename; |
| 77 | gfc_linebuf *lb; |
| 78 | int line; |
| 79 | } *file_changes; |
| 80 | size_t file_changes_cur, file_changes_count; |
| 81 | size_t file_changes_allocated; |
| 82 | |
| 83 | static gfc_char_t *last_error_char; |
| 84 | |
| 85 | /* Functions dealing with our wide characters (gfc_char_t) and |
| 86 | sequences of such characters. */ |
| 87 | |
| 88 | int |
| 89 | gfc_wide_fits_in_byte (gfc_char_t c) |
| 90 | { |
| 91 | return (c <= UCHAR_MAX(127*2 +1)); |
| 92 | } |
| 93 | |
| 94 | static inline int |
| 95 | wide_is_ascii (gfc_char_t c) |
| 96 | { |
| 97 | return (gfc_wide_fits_in_byte (c) && ((unsigned char) c & ~0x7f) == 0); |
| 98 | } |
| 99 | |
| 100 | int |
| 101 | gfc_wide_is_printable (gfc_char_t c) |
| 102 | { |
| 103 | return (gfc_wide_fits_in_byte (c) && ISPRINT ((unsigned char) c)(_sch_istable[((unsigned char) c) & 0xff] & (unsigned short)(_sch_isprint))); |
| 104 | } |
| 105 | |
| 106 | gfc_char_t |
| 107 | gfc_wide_tolower (gfc_char_t c) |
| 108 | { |
| 109 | return (wide_is_ascii (c) ? (gfc_char_t) TOLOWER((unsigned char) c)_sch_tolower[((unsigned char) c) & 0xff] : c); |
| 110 | } |
| 111 | |
| 112 | gfc_char_t |
| 113 | gfc_wide_toupper (gfc_char_t c) |
| 114 | { |
| 115 | return (wide_is_ascii (c) ? (gfc_char_t) TOUPPER((unsigned char) c)_sch_toupper[((unsigned char) c) & 0xff] : c); |
| 116 | } |
| 117 | |
| 118 | int |
| 119 | gfc_wide_is_digit (gfc_char_t c) |
| 120 | { |
| 121 | return (c >= '0' && c <= '9'); |
| 122 | } |
| 123 | |
| 124 | static inline int |
| 125 | wide_atoi (gfc_char_t *c) |
| 126 | { |
| 127 | #define MAX_DIGITS20 20 |
| 128 | char buf[MAX_DIGITS20+1]; |
| 129 | int i = 0; |
| 130 | |
| 131 | while (gfc_wide_is_digit(*c) && i < MAX_DIGITS20) |
| 132 | buf[i++] = *c++; |
| 133 | buf[i] = '\0'; |
| 134 | return atoi (buf); |
| 135 | } |
| 136 | |
| 137 | size_t |
| 138 | gfc_wide_strlen (const gfc_char_t *str) |
| 139 | { |
| 140 | size_t i; |
| 141 | |
| 142 | for (i = 0; str[i]; i++) |
| 143 | ; |
| 144 | |
| 145 | return i; |
| 146 | } |
| 147 | |
| 148 | gfc_char_t * |
| 149 | gfc_wide_memset (gfc_char_t *b, gfc_char_t c, size_t len) |
| 150 | { |
| 151 | size_t i; |
| 152 | |
| 153 | for (i = 0; i < len; i++) |
| 154 | b[i] = c; |
| 155 | |
| 156 | return b; |
| 157 | } |
| 158 | |
| 159 | static gfc_char_t * |
| 160 | wide_strcpy (gfc_char_t *dest, const gfc_char_t *src) |
| 161 | { |
| 162 | gfc_char_t *d; |
| 163 | |
| 164 | for (d = dest; (*d = *src) != '\0'; ++src, ++d) |
| 165 | ; |
| 166 | |
| 167 | return dest; |
| 168 | } |
| 169 | |
| 170 | static gfc_char_t * |
| 171 | wide_strchr (const gfc_char_t *s, gfc_char_t c) |
| 172 | { |
| 173 | do { |
| 174 | if (*s == c) |
| 175 | { |
| 176 | return CONST_CAST(gfc_char_t *, s)(const_cast<gfc_char_t *> ((s))); |
| 177 | } |
| 178 | } while (*s++); |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | char * |
| 183 | gfc_widechar_to_char (const gfc_char_t *s, int length) |
| 184 | { |
| 185 | size_t len, i; |
| 186 | char *res; |
| 187 | |
| 188 | if (s == NULL__null) |
| 189 | return NULL__null; |
| 190 | |
| 191 | /* Passing a negative length is used to indicate that length should be |
| 192 | calculated using gfc_wide_strlen(). */ |
| 193 | len = (length >= 0 ? (size_t) length : gfc_wide_strlen (s)); |
| 194 | res = XNEWVEC (char, len + 1)((char *) xmalloc (sizeof (char) * (len + 1))); |
| 195 | |
| 196 | for (i = 0; i < len; i++) |
| 197 | { |
| 198 | gcc_assert (gfc_wide_fits_in_byte (s[i]))((void)(!(gfc_wide_fits_in_byte (s[i])) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/fortran/scanner.c" , 198, __FUNCTION__), 0 : 0)); |
| 199 | res[i] = (unsigned char) s[i]; |
| 200 | } |
| 201 | |
| 202 | res[len] = '\0'; |
| 203 | return res; |
| 204 | } |
| 205 | |
| 206 | gfc_char_t * |
| 207 | gfc_char_to_widechar (const char *s) |
| 208 | { |
| 209 | size_t len, i; |
| 210 | gfc_char_t *res; |
| 211 | |
| 212 | if (s == NULL__null) |
| 213 | return NULL__null; |
| 214 | |
| 215 | len = strlen (s); |
| 216 | res = gfc_get_wide_string (len + 1)((gfc_char_t *) xcalloc ((len + 1), sizeof (gfc_char_t))); |
| 217 | |
| 218 | for (i = 0; i < len; i++) |
| 219 | res[i] = (unsigned char) s[i]; |
| 220 | |
| 221 | res[len] = '\0'; |
| 222 | return res; |
| 223 | } |
| 224 | |
| 225 | static int |
| 226 | wide_strncmp (const gfc_char_t *s1, const char *s2, size_t n) |
| 227 | { |
| 228 | gfc_char_t c1, c2; |
| 229 | |
| 230 | while (n-- > 0) |
| 231 | { |
| 232 | c1 = *s1++; |
| 233 | c2 = *s2++; |
| 234 | if (c1 != c2) |
| 235 | return (c1 > c2 ? 1 : -1); |
| 236 | if (c1 == '\0') |
| 237 | return 0; |
| 238 | } |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | int |
| 243 | gfc_wide_strncasecmp (const gfc_char_t *s1, const char *s2, size_t n) |
| 244 | { |
| 245 | gfc_char_t c1, c2; |
| 246 | |
| 247 | while (n-- > 0) |
| 248 | { |
| 249 | c1 = gfc_wide_tolower (*s1++); |
| 250 | c2 = TOLOWER (*s2++)_sch_tolower[(*s2++) & 0xff]; |
| 251 | if (c1 != c2) |
| 252 | return (c1 > c2 ? 1 : -1); |
| 253 | if (c1 == '\0') |
| 254 | return 0; |
| 255 | } |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | |
| 260 | /* Main scanner initialization. */ |
| 261 | |
| 262 | void |
| 263 | gfc_scanner_init_1 (void) |
| 264 | { |
| 265 | file_head = NULL__null; |
| 266 | line_head = NULL__null; |
| 267 | line_tail = NULL__null; |
| 268 | |
| 269 | continue_count = 0; |
| 270 | continue_line = 0; |
| 271 | |
| 272 | end_flag = 0; |
| 273 | last_error_char = NULL__null; |
| 274 | } |
| 275 | |
| 276 | |
| 277 | /* Main scanner destructor. */ |
| 278 | |
| 279 | void |
| 280 | gfc_scanner_done_1 (void) |
| 281 | { |
| 282 | gfc_linebuf *lb; |
| 283 | gfc_file *f; |
| 284 | |
| 285 | while(line_head != NULL__null) |
| 286 | { |
| 287 | lb = line_head->next; |
| 288 | free (line_head); |
| 289 | line_head = lb; |
| 290 | } |
| 291 | |
| 292 | while(file_head != NULL__null) |
| 293 | { |
| 294 | f = file_head->next; |
| 295 | free (file_head->filename); |
| 296 | free (file_head); |
| 297 | file_head = f; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | |
| 302 | /* Adds path to the list pointed to by list. */ |
| 303 | |
| 304 | static void |
| 305 | add_path_to_list (gfc_directorylist **list, const char *path, |
| 306 | bool use_for_modules, bool head, bool warn) |
| 307 | { |
| 308 | gfc_directorylist *dir; |
| 309 | const char *p; |
| 310 | char *q; |
| 311 | struct stat st; |
| 312 | size_t len; |
| 313 | int i; |
| 314 | |
| 315 | p = path; |
| 316 | while (*p == ' ' || *p == '\t') /* someone might do "-I include" */ |
| 317 | if (*p++ == '\0') |
| 318 | return; |
| 319 | |
| 320 | /* Strip trailing directory separators from the path, as this |
| 321 | will confuse Windows systems. */ |
| 322 | len = strlen (p); |
| 323 | q = (char *) alloca (len + 1)__builtin_alloca(len + 1); |
| 324 | memcpy (q, p, len + 1); |
| 325 | i = len - 1; |
| 326 | while (i >=0 && IS_DIR_SEPARATOR (q[i])(((q[i]) == '/') || (((q[i]) == '\\') && (0)))) |
| 327 | q[i--] = '\0'; |
| 328 | |
| 329 | if (stat (q, &st)) |
| 330 | { |
| 331 | if (errno(*__errno_location ()) != ENOENT2) |
| 332 | gfc_warning_now (0, "Include directory %qs: %s", path, |
| 333 | xstrerror(errno(*__errno_location ()))); |
| 334 | else if (warn) |
| 335 | gfc_warning_now (OPT_Wmissing_include_dirs, |
| 336 | "Nonexistent include directory %qs", path); |
| 337 | return; |
| 338 | } |
| 339 | else if (!S_ISDIR (st.st_mode)((((st.st_mode)) & 0170000) == (0040000))) |
| 340 | { |
| 341 | gfc_fatal_error ("%qs is not a directory", path); |
| 342 | return; |
| 343 | } |
| 344 | |
| 345 | if (head || *list == NULL__null) |
| 346 | { |
| 347 | dir = XCNEW (gfc_directorylist)((gfc_directorylist *) xcalloc (1, sizeof (gfc_directorylist) )); |
| 348 | if (!head) |
| 349 | *list = dir; |
| 350 | } |
| 351 | else |
| 352 | { |
| 353 | dir = *list; |
| 354 | while (dir->next) |
| 355 | dir = dir->next; |
| 356 | |
| 357 | dir->next = XCNEW (gfc_directorylist)((gfc_directorylist *) xcalloc (1, sizeof (gfc_directorylist) )); |
| 358 | dir = dir->next; |
| 359 | } |
| 360 | |
| 361 | dir->next = head ? *list : NULL__null; |
| 362 | if (head) |
| 363 | *list = dir; |
| 364 | dir->use_for_modules = use_for_modules; |
| 365 | dir->path = XCNEWVEC (char, strlen (p) + 2)((char *) xcalloc ((strlen (p) + 2), sizeof (char))); |
| 366 | strcpy (dir->path, p); |
| 367 | strcat (dir->path, "/"); /* make '/' last character */ |
| 368 | } |
| 369 | |
| 370 | |
| 371 | void |
| 372 | gfc_add_include_path (const char *path, bool use_for_modules, bool file_dir, |
| 373 | bool warn) |
| 374 | { |
| 375 | add_path_to_list (&include_dirs, path, use_for_modules, file_dir, warn); |
| 376 | |
| 377 | /* For '#include "..."' these directories are automatically searched. */ |
| 378 | if (!file_dir) |
| 379 | gfc_cpp_add_include_path (xstrdup(path), true); |
| 380 | } |
| 381 | |
| 382 | |
| 383 | void |
| 384 | gfc_add_intrinsic_modules_path (const char *path) |
| 385 | { |
| 386 | add_path_to_list (&intrinsic_modules_dirs, path, true, false, false); |
| 387 | } |
| 388 | |
| 389 | |
| 390 | /* Release resources allocated for options. */ |
| 391 | |
| 392 | void |
| 393 | gfc_release_include_path (void) |
| 394 | { |
| 395 | gfc_directorylist *p; |
| 396 | |
| 397 | while (include_dirs != NULL__null) |
| 398 | { |
| 399 | p = include_dirs; |
| 400 | include_dirs = include_dirs->next; |
| 401 | free (p->path); |
| 402 | free (p); |
| 403 | } |
| 404 | |
| 405 | while (intrinsic_modules_dirs != NULL__null) |
| 406 | { |
| 407 | p = intrinsic_modules_dirs; |
| 408 | intrinsic_modules_dirs = intrinsic_modules_dirs->next; |
| 409 | free (p->path); |
| 410 | free (p); |
| 411 | } |
| 412 | |
| 413 | free (gfc_option.module_dir); |
| 414 | } |
| 415 | |
| 416 | |
| 417 | static FILE * |
| 418 | open_included_file (const char *name, gfc_directorylist *list, |
| 419 | bool module, bool system) |
| 420 | { |
| 421 | char *fullname; |
| 422 | gfc_directorylist *p; |
| 423 | FILE *f; |
| 424 | |
| 425 | for (p = list; p; p = p->next) |
| 426 | { |
| 427 | if (module && !p->use_for_modules) |
| 428 | continue; |
| 429 | |
| 430 | fullname = (char *) alloca(strlen (p->path) + strlen (name) + 1)__builtin_alloca(strlen (p->path) + strlen (name) + 1); |
| 431 | strcpy (fullname, p->path); |
| 432 | strcat (fullname, name); |
| 433 | |
| 434 | f = gfc_open_file (fullname); |
| 435 | if (f != NULL__null) |
| 436 | { |
| 437 | if (gfc_cpp_makedep ()) |
| 438 | gfc_cpp_add_dep (fullname, system); |
| 439 | |
| 440 | return f; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | return NULL__null; |
| 445 | } |
| 446 | |
| 447 | |
| 448 | /* Opens file for reading, searching through the include directories |
| 449 | given if necessary. If the include_cwd argument is true, we try |
| 450 | to open the file in the current directory first. */ |
| 451 | |
| 452 | FILE * |
| 453 | gfc_open_included_file (const char *name, bool include_cwd, bool module) |
| 454 | { |
| 455 | FILE *f = NULL__null; |
| 456 | |
| 457 | if (IS_ABSOLUTE_PATH (name)(((((name)[0]) == '/') || ((((name)[0]) == '\\') && ( 0))) || ((name)[0] && ((name)[1] == ':') && ( 0))) || include_cwd) |
| 458 | { |
| 459 | f = gfc_open_file (name); |
| 460 | if (f && gfc_cpp_makedep ()) |
| 461 | gfc_cpp_add_dep (name, false); |
| 462 | } |
| 463 | |
| 464 | if (!f) |
| 465 | f = open_included_file (name, include_dirs, module, false); |
| 466 | |
| 467 | return f; |
| 468 | } |
| 469 | |
| 470 | |
| 471 | /* Test to see if we're at the end of the main source file. */ |
| 472 | |
| 473 | int |
| 474 | gfc_at_end (void) |
| 475 | { |
| 476 | return end_flag; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | /* Test to see if we're at the end of the current file. */ |
| 481 | |
| 482 | int |
| 483 | gfc_at_eof (void) |
| 484 | { |
| 485 | if (gfc_at_end ()) |
| 486 | return 1; |
| 487 | |
| 488 | if (line_head == NULL__null) |
| 489 | return 1; /* Null file */ |
| 490 | |
| 491 | if (gfc_current_locus.lb == NULL__null) |
| 492 | return 1; |
| 493 | |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | |
| 498 | /* Test to see if we're at the beginning of a new line. */ |
| 499 | |
| 500 | int |
| 501 | gfc_at_bol (void) |
| 502 | { |
| 503 | if (gfc_at_eof ()) |
| 504 | return 1; |
| 505 | |
| 506 | return (gfc_current_locus.nextc == gfc_current_locus.lb->line); |
| 507 | } |
| 508 | |
| 509 | |
| 510 | /* Test to see if we're at the end of a line. */ |
| 511 | |
| 512 | int |
| 513 | gfc_at_eol (void) |
| 514 | { |
| 515 | if (gfc_at_eof ()) |
| 516 | return 1; |
| 517 | |
| 518 | return (*gfc_current_locus.nextc == '\0'); |
| 519 | } |
| 520 | |
| 521 | static void |
| 522 | add_file_change (const char *filename, int line) |
| 523 | { |
| 524 | if (file_changes_count == file_changes_allocated) |
| 525 | { |
| 526 | if (file_changes_allocated) |
| 527 | file_changes_allocated *= 2; |
| 528 | else |
| 529 | file_changes_allocated = 16; |
| 530 | file_changes = XRESIZEVEC (struct gfc_file_change, file_changes,((struct gfc_file_change *) xrealloc ((void *) (file_changes) , sizeof (struct gfc_file_change) * (file_changes_allocated)) ) |
| 531 | file_changes_allocated)((struct gfc_file_change *) xrealloc ((void *) (file_changes) , sizeof (struct gfc_file_change) * (file_changes_allocated)) ); |
| 532 | } |
| 533 | file_changes[file_changes_count].filename = filename; |
| 534 | file_changes[file_changes_count].lb = NULL__null; |
| 535 | file_changes[file_changes_count++].line = line; |
| 536 | } |
| 537 | |
| 538 | static void |
| 539 | report_file_change (gfc_linebuf *lb) |
| 540 | { |
| 541 | size_t c = file_changes_cur; |
| 542 | while (c < file_changes_count |
| 543 | && file_changes[c].lb == lb) |
| 544 | { |
| 545 | if (file_changes[c].filename) |
| 546 | (*debug_hooks->start_source_file) (file_changes[c].line, |
| 547 | file_changes[c].filename); |
| 548 | else |
| 549 | (*debug_hooks->end_source_file) (file_changes[c].line); |
| 550 | ++c; |
| 551 | } |
| 552 | file_changes_cur = c; |
| 553 | } |
| 554 | |
| 555 | void |
| 556 | gfc_start_source_files (void) |
| 557 | { |
| 558 | /* If the debugger wants the name of the main source file, |
| 559 | we give it. */ |
| 560 | if (debug_hooks->start_end_main_source_file) |
| 561 | (*debug_hooks->start_source_file) (0, gfc_source_file); |
| 562 | |
| 563 | file_changes_cur = 0; |
| 564 | report_file_change (gfc_current_locus.lb); |
| 565 | } |
| 566 | |
| 567 | void |
| 568 | gfc_end_source_files (void) |
| 569 | { |
| 570 | report_file_change (NULL__null); |
| 571 | |
| 572 | if (debug_hooks->start_end_main_source_file) |
| 573 | (*debug_hooks->end_source_file) (0); |
| 574 | } |
| 575 | |
| 576 | /* Advance the current line pointer to the next line. */ |
| 577 | |
| 578 | void |
| 579 | gfc_advance_line (void) |
| 580 | { |
| 581 | if (gfc_at_end ()) |
| 582 | return; |
| 583 | |
| 584 | if (gfc_current_locus.lb == NULL__null) |
| 585 | { |
| 586 | end_flag = 1; |
| 587 | return; |
| 588 | } |
| 589 | |
| 590 | if (gfc_current_locus.lb->next |
| 591 | && !gfc_current_locus.lb->next->dbg_emitted) |
| 592 | { |
| 593 | report_file_change (gfc_current_locus.lb->next); |
| 594 | gfc_current_locus.lb->next->dbg_emitted = true; |
| 595 | } |
| 596 | |
| 597 | gfc_current_locus.lb = gfc_current_locus.lb->next; |
| 598 | |
| 599 | if (gfc_current_locus.lb != NULL__null) |
| 600 | gfc_current_locus.nextc = gfc_current_locus.lb->line; |
| 601 | else |
| 602 | { |
| 603 | gfc_current_locus.nextc = NULL__null; |
| 604 | end_flag = 1; |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | |
| 609 | /* Get the next character from the input, advancing gfc_current_file's |
| 610 | locus. When we hit the end of the line or the end of the file, we |
| 611 | start returning a '\n' in order to complete the current statement. |
| 612 | No Fortran line conventions are implemented here. |
| 613 | |
| 614 | Requiring explicit advances to the next line prevents the parse |
| 615 | pointer from being on the wrong line if the current statement ends |
| 616 | prematurely. */ |
| 617 | |
| 618 | static gfc_char_t |
| 619 | next_char (void) |
| 620 | { |
| 621 | gfc_char_t c; |
| 622 | |
| 623 | if (gfc_current_locus.nextc == NULL__null) |
| 624 | return '\n'; |
| 625 | |
| 626 | c = *gfc_current_locus.nextc++; |
| 627 | if (c == '\0') |
| 628 | { |
| 629 | gfc_current_locus.nextc--; /* Remain on this line. */ |
| 630 | c = '\n'; |
| 631 | } |
| 632 | |
| 633 | return c; |
| 634 | } |
| 635 | |
| 636 | |
| 637 | /* Skip a comment. When we come here the parse pointer is positioned |
| 638 | immediately after the comment character. If we ever implement |
| 639 | compiler directives within comments, here is where we parse the |
| 640 | directive. */ |
| 641 | |
| 642 | static void |
| 643 | skip_comment_line (void) |
| 644 | { |
| 645 | gfc_char_t c; |
| 646 | |
| 647 | do |
| 648 | { |
| 649 | c = next_char (); |
| 650 | } |
| 651 | while (c != '\n'); |
| 652 | |
| 653 | gfc_advance_line (); |
| 654 | } |
| 655 | |
| 656 | |
| 657 | int |
| 658 | gfc_define_undef_line (void) |
| 659 | { |
| 660 | char *tmp; |
| 661 | |
| 662 | /* All lines beginning with '#' are either #define or #undef. */ |
| 663 | if (debug_info_levelglobal_options.x_debug_info_level != DINFO_LEVEL_VERBOSE || gfc_peek_ascii_char () != '#') |
| 664 | return 0; |
| 665 | |
| 666 | if (wide_strncmp (gfc_current_locus.nextc, "#define ", 8) == 0) |
| 667 | { |
| 668 | tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[8], -1); |
| 669 | (*debug_hooks->define) (gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )), |
| 670 | tmp); |
| 671 | free (tmp); |
| 672 | } |
| 673 | |
| 674 | if (wide_strncmp (gfc_current_locus.nextc, "#undef ", 7) == 0) |
| 675 | { |
| 676 | tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[7], -1); |
| 677 | (*debug_hooks->undef) (gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )), |
| 678 | tmp); |
| 679 | free (tmp); |
| 680 | } |
| 681 | |
| 682 | /* Skip the rest of the line. */ |
| 683 | skip_comment_line (); |
| 684 | |
| 685 | return 1; |
| 686 | } |
| 687 | |
| 688 | |
| 689 | /* Return true if GCC$ was matched. */ |
| 690 | static bool |
| 691 | skip_gcc_attribute (locus start) |
| 692 | { |
| 693 | bool r = false; |
| 694 | char c; |
| 695 | locus old_loc = gfc_current_locus; |
| 696 | |
| 697 | if ((c = next_char ()) == 'g' || c == 'G') |
| 698 | if ((c = next_char ()) == 'c' || c == 'C') |
| 699 | if ((c = next_char ()) == 'c' || c == 'C') |
| 700 | if ((c = next_char ()) == '$') |
| 701 | r = true; |
| 702 | |
| 703 | if (r == false) |
| 704 | gfc_current_locus = old_loc; |
| 705 | else |
| 706 | { |
| 707 | gcc_attribute_flag = 1; |
| 708 | gcc_attribute_locus = old_loc; |
| 709 | gfc_current_locus = start; |
| 710 | } |
| 711 | |
| 712 | return r; |
| 713 | } |
| 714 | |
| 715 | /* Return true if CC was matched. */ |
| 716 | static bool |
| 717 | skip_free_oacc_sentinel (locus start, locus old_loc) |
| 718 | { |
| 719 | bool r = false; |
| 720 | char c; |
| 721 | |
| 722 | if ((c = next_char ()) == 'c' || c == 'C') |
| 723 | if ((c = next_char ()) == 'c' || c == 'C') |
| 724 | r = true; |
| 725 | |
| 726 | if (r) |
| 727 | { |
| 728 | if ((c = next_char ()) == ' ' || c == '\t' |
| 729 | || continue_flag) |
| 730 | { |
| 731 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))) |
| 732 | c = next_char (); |
| 733 | if (c != '\n' && c != '!') |
| 734 | { |
| 735 | openacc_flag = 1; |
| 736 | openacc_locus = old_loc; |
| 737 | gfc_current_locus = start; |
| 738 | } |
| 739 | else |
| 740 | r = false; |
| 741 | } |
| 742 | else |
| 743 | { |
| 744 | gfc_warning_now (0, "!$ACC at %C starts a commented " |
| 745 | "line as it neither is followed " |
| 746 | "by a space nor is a " |
| 747 | "continuation line"); |
| 748 | r = false; |
| 749 | } |
| 750 | } |
| 751 | |
| 752 | return r; |
| 753 | } |
| 754 | |
| 755 | /* Return true if MP was matched. */ |
| 756 | static bool |
| 757 | skip_free_omp_sentinel (locus start, locus old_loc) |
| 758 | { |
| 759 | bool r = false; |
| 760 | char c; |
| 761 | |
| 762 | if ((c = next_char ()) == 'm' || c == 'M') |
| 763 | if ((c = next_char ()) == 'p' || c == 'P') |
| 764 | r = true; |
| 765 | |
| 766 | if (r) |
| 767 | { |
| 768 | if ((c = next_char ()) == ' ' || c == '\t' |
| 769 | || continue_flag) |
| 770 | { |
| 771 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))) |
| 772 | c = next_char (); |
| 773 | if (c != '\n' && c != '!') |
| 774 | { |
| 775 | openmp_flag = 1; |
| 776 | openmp_locus = old_loc; |
| 777 | gfc_current_locus = start; |
| 778 | } |
| 779 | else |
| 780 | r = false; |
| 781 | } |
| 782 | else |
| 783 | { |
| 784 | gfc_warning_now (0, "!$OMP at %C starts a commented " |
| 785 | "line as it neither is followed " |
| 786 | "by a space nor is a " |
| 787 | "continuation line"); |
| 788 | r = false; |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | return r; |
| 793 | } |
| 794 | |
| 795 | /* Comment lines are null lines, lines containing only blanks or lines |
| 796 | on which the first nonblank line is a '!'. |
| 797 | Return true if !$ openmp or openacc conditional compilation sentinel was |
| 798 | seen. */ |
| 799 | |
| 800 | static bool |
| 801 | skip_free_comments (void) |
| 802 | { |
| 803 | locus start; |
| 804 | gfc_char_t c; |
| 805 | int at_bol; |
| 806 | |
| 807 | for (;;) |
| 808 | { |
| 809 | at_bol = gfc_at_bol (); |
| 810 | start = gfc_current_locus; |
| 811 | if (gfc_at_eof ()) |
| 812 | break; |
| 813 | |
| 814 | do |
| 815 | c = next_char (); |
| 816 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))); |
| 817 | |
| 818 | if (c == '\n') |
| 819 | { |
| 820 | gfc_advance_line (); |
| 821 | continue; |
| 822 | } |
| 823 | |
| 824 | if (c == '!') |
| 825 | { |
| 826 | /* Keep the !GCC$ line. */ |
| 827 | if (at_bol && skip_gcc_attribute (start)) |
| 828 | return false; |
| 829 | |
| 830 | /* If -fopenmp/-fopenacc, we need to handle here 2 things: |
| 831 | 1) don't treat !$omp/!$acc as comments, but directives |
| 832 | 2) handle OpenMP/OpenACC conditional compilation, where |
| 833 | !$ should be treated as 2 spaces (for initial lines |
| 834 | only if followed by space). */ |
| 835 | if (at_bol) |
| 836 | { |
| 837 | if ((flag_openmpglobal_options.x_flag_openmp || flag_openmp_simdglobal_options.x_flag_openmp_simd) |
| 838 | && flag_openaccglobal_options.x_flag_openacc) |
| 839 | { |
| 840 | locus old_loc = gfc_current_locus; |
| 841 | if (next_char () == '$') |
| 842 | { |
| 843 | c = next_char (); |
| 844 | if (c == 'o' || c == 'O') |
| 845 | { |
| 846 | if (skip_free_omp_sentinel (start, old_loc)) |
| 847 | return false; |
| 848 | gfc_current_locus = old_loc; |
| 849 | next_char (); |
| 850 | c = next_char (); |
| 851 | } |
| 852 | else if (c == 'a' || c == 'A') |
| 853 | { |
| 854 | if (skip_free_oacc_sentinel (start, old_loc)) |
| 855 | return false; |
| 856 | gfc_current_locus = old_loc; |
| 857 | next_char (); |
| 858 | c = next_char (); |
| 859 | } |
| 860 | if (continue_flag || c == ' ' || c == '\t') |
| 861 | { |
| 862 | gfc_current_locus = old_loc; |
| 863 | next_char (); |
| 864 | openmp_flag = openacc_flag = 0; |
| 865 | return true; |
| 866 | } |
| 867 | } |
| 868 | gfc_current_locus = old_loc; |
| 869 | } |
| 870 | else if ((flag_openmpglobal_options.x_flag_openmp || flag_openmp_simdglobal_options.x_flag_openmp_simd) |
| 871 | && !flag_openaccglobal_options.x_flag_openacc) |
| 872 | { |
| 873 | locus old_loc = gfc_current_locus; |
| 874 | if (next_char () == '$') |
| 875 | { |
| 876 | c = next_char (); |
| 877 | if (c == 'o' || c == 'O') |
| 878 | { |
| 879 | if (skip_free_omp_sentinel (start, old_loc)) |
| 880 | return false; |
| 881 | gfc_current_locus = old_loc; |
| 882 | next_char (); |
| 883 | c = next_char (); |
| 884 | } |
| 885 | if (continue_flag || c == ' ' || c == '\t') |
| 886 | { |
| 887 | gfc_current_locus = old_loc; |
| 888 | next_char (); |
| 889 | openmp_flag = 0; |
| 890 | return true; |
| 891 | } |
| 892 | } |
| 893 | gfc_current_locus = old_loc; |
| 894 | } |
| 895 | else if (flag_openaccglobal_options.x_flag_openacc |
| 896 | && !(flag_openmpglobal_options.x_flag_openmp || flag_openmp_simdglobal_options.x_flag_openmp_simd)) |
| 897 | { |
| 898 | locus old_loc = gfc_current_locus; |
| 899 | if (next_char () == '$') |
| 900 | { |
| 901 | c = next_char (); |
| 902 | if (c == 'a' || c == 'A') |
| 903 | { |
| 904 | if (skip_free_oacc_sentinel (start, old_loc)) |
| 905 | return false; |
| 906 | gfc_current_locus = old_loc; |
| 907 | next_char(); |
| 908 | c = next_char(); |
Value stored to 'c' is never read | |
| 909 | } |
| 910 | } |
| 911 | gfc_current_locus = old_loc; |
| 912 | } |
| 913 | } |
| 914 | skip_comment_line (); |
| 915 | continue; |
| 916 | } |
| 917 | |
| 918 | break; |
| 919 | } |
| 920 | |
| 921 | if (openmp_flag && at_bol) |
| 922 | openmp_flag = 0; |
| 923 | |
| 924 | if (openacc_flag && at_bol) |
| 925 | openacc_flag = 0; |
| 926 | |
| 927 | gcc_attribute_flag = 0; |
| 928 | gfc_current_locus = start; |
| 929 | return false; |
| 930 | } |
| 931 | |
| 932 | /* Return true if MP was matched in fixed form. */ |
| 933 | static bool |
| 934 | skip_fixed_omp_sentinel (locus *start) |
| 935 | { |
| 936 | gfc_char_t c; |
| 937 | if (((c = next_char ()) == 'm' || c == 'M') |
| 938 | && ((c = next_char ()) == 'p' || c == 'P')) |
| 939 | { |
| 940 | c = next_char (); |
| 941 | if (c != '\n' |
| 942 | && (continue_flag |
| 943 | || c == ' ' || c == '\t' || c == '0')) |
| 944 | { |
| 945 | do |
| 946 | c = next_char (); |
| 947 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))); |
| 948 | if (c != '\n' && c != '!') |
| 949 | { |
| 950 | /* Canonicalize to *$omp. */ |
| 951 | *start->nextc = '*'; |
| 952 | openmp_flag = 1; |
| 953 | gfc_current_locus = *start; |
| 954 | return true; |
| 955 | } |
| 956 | } |
| 957 | } |
| 958 | return false; |
| 959 | } |
| 960 | |
| 961 | /* Return true if CC was matched in fixed form. */ |
| 962 | static bool |
| 963 | skip_fixed_oacc_sentinel (locus *start) |
| 964 | { |
| 965 | gfc_char_t c; |
| 966 | if (((c = next_char ()) == 'c' || c == 'C') |
| 967 | && ((c = next_char ()) == 'c' || c == 'C')) |
| 968 | { |
| 969 | c = next_char (); |
| 970 | if (c != '\n' |
| 971 | && (continue_flag |
| 972 | || c == ' ' || c == '\t' || c == '0')) |
| 973 | { |
| 974 | do |
| 975 | c = next_char (); |
| 976 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))); |
| 977 | if (c != '\n' && c != '!') |
| 978 | { |
| 979 | /* Canonicalize to *$acc. */ |
| 980 | *start->nextc = '*'; |
| 981 | openacc_flag = 1; |
| 982 | gfc_current_locus = *start; |
| 983 | return true; |
| 984 | } |
| 985 | } |
| 986 | } |
| 987 | return false; |
| 988 | } |
| 989 | |
| 990 | /* Skip comment lines in fixed source mode. We have the same rules as |
| 991 | in skip_free_comment(), except that we can have a 'c', 'C' or '*' |
| 992 | in column 1, and a '!' cannot be in column 6. Also, we deal with |
| 993 | lines with 'd' or 'D' in column 1, if the user requested this. */ |
| 994 | |
| 995 | static void |
| 996 | skip_fixed_comments (void) |
| 997 | { |
| 998 | locus start; |
| 999 | int col; |
| 1000 | gfc_char_t c; |
| 1001 | |
| 1002 | if (! gfc_at_bol ()) |
| 1003 | { |
| 1004 | start = gfc_current_locus; |
| 1005 | if (! gfc_at_eof ()) |
| 1006 | { |
| 1007 | do |
| 1008 | c = next_char (); |
| 1009 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))); |
| 1010 | |
| 1011 | if (c == '\n') |
| 1012 | gfc_advance_line (); |
| 1013 | else if (c == '!') |
| 1014 | skip_comment_line (); |
| 1015 | } |
| 1016 | |
| 1017 | if (! gfc_at_bol ()) |
| 1018 | { |
| 1019 | gfc_current_locus = start; |
| 1020 | return; |
| 1021 | } |
| 1022 | } |
| 1023 | |
| 1024 | for (;;) |
| 1025 | { |
| 1026 | start = gfc_current_locus; |
| 1027 | if (gfc_at_eof ()) |
| 1028 | break; |
| 1029 | |
| 1030 | c = next_char (); |
| 1031 | if (c == '\n') |
| 1032 | { |
| 1033 | gfc_advance_line (); |
| 1034 | continue; |
| 1035 | } |
| 1036 | |
| 1037 | if (c == '!' || c == 'c' || c == 'C' || c == '*') |
| 1038 | { |
| 1039 | if (skip_gcc_attribute (start)) |
| 1040 | { |
| 1041 | /* Canonicalize to *$omp. */ |
| 1042 | *start.nextc = '*'; |
| 1043 | return; |
| 1044 | } |
| 1045 | |
| 1046 | if (gfc_current_locus.lb != NULL__null |
| 1047 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line ))) |
| 1048 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )); |
| 1049 | |
| 1050 | /* If -fopenmp/-fopenacc, we need to handle here 2 things: |
| 1051 | 1) don't treat !$omp/!$acc|c$omp/c$acc|*$omp / *$acc as comments, |
| 1052 | but directives |
| 1053 | 2) handle OpenMP/OpenACC conditional compilation, where |
| 1054 | !$|c$|*$ should be treated as 2 spaces if the characters |
| 1055 | in columns 3 to 6 are valid fixed form label columns |
| 1056 | characters. */ |
| 1057 | if ((flag_openmpglobal_options.x_flag_openmp || flag_openmp_simdglobal_options.x_flag_openmp_simd) && !flag_openaccglobal_options.x_flag_openacc) |
| 1058 | { |
| 1059 | if (next_char () == '$') |
| 1060 | { |
| 1061 | c = next_char (); |
| 1062 | if (c == 'o' || c == 'O') |
| 1063 | { |
| 1064 | if (skip_fixed_omp_sentinel (&start)) |
| 1065 | return; |
| 1066 | } |
| 1067 | else |
| 1068 | goto check_for_digits; |
| 1069 | } |
| 1070 | gfc_current_locus = start; |
| 1071 | } |
| 1072 | else if (flag_openaccglobal_options.x_flag_openacc && !(flag_openmpglobal_options.x_flag_openmp || flag_openmp_simdglobal_options.x_flag_openmp_simd)) |
| 1073 | { |
| 1074 | if (next_char () == '$') |
| 1075 | { |
| 1076 | c = next_char (); |
| 1077 | if (c == 'a' || c == 'A') |
| 1078 | { |
| 1079 | if (skip_fixed_oacc_sentinel (&start)) |
| 1080 | return; |
| 1081 | } |
| 1082 | } |
| 1083 | gfc_current_locus = start; |
| 1084 | } |
| 1085 | else if (flag_openaccglobal_options.x_flag_openacc || flag_openmpglobal_options.x_flag_openmp || flag_openmp_simdglobal_options.x_flag_openmp_simd) |
| 1086 | { |
| 1087 | if (next_char () == '$') |
| 1088 | { |
| 1089 | c = next_char (); |
| 1090 | if (c == 'a' || c == 'A') |
| 1091 | { |
| 1092 | if (skip_fixed_oacc_sentinel (&start)) |
| 1093 | return; |
| 1094 | } |
| 1095 | else if (c == 'o' || c == 'O') |
| 1096 | { |
| 1097 | if (skip_fixed_omp_sentinel (&start)) |
| 1098 | return; |
| 1099 | } |
| 1100 | else |
| 1101 | goto check_for_digits; |
| 1102 | } |
| 1103 | gfc_current_locus = start; |
| 1104 | } |
| 1105 | |
| 1106 | skip_comment_line (); |
| 1107 | continue; |
| 1108 | |
| 1109 | gcc_unreachable ()(fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/fortran/scanner.c" , 1109, __FUNCTION__)); |
| 1110 | check_for_digits: |
| 1111 | { |
| 1112 | /* Required for OpenMP's conditional compilation sentinel. */ |
| 1113 | int digit_seen = 0; |
| 1114 | |
| 1115 | for (col = 3; col < 6; col++, c = next_char ()) |
| 1116 | if (c == ' ') |
| 1117 | continue; |
| 1118 | else if (c == '\t') |
| 1119 | { |
| 1120 | col = 6; |
| 1121 | break; |
| 1122 | } |
| 1123 | else if (c < '0' || c > '9') |
| 1124 | break; |
| 1125 | else |
| 1126 | digit_seen = 1; |
| 1127 | |
| 1128 | if (col == 6 && c != '\n' |
| 1129 | && ((continue_flag && !digit_seen) |
| 1130 | || c == ' ' || c == '\t' || c == '0')) |
| 1131 | { |
| 1132 | gfc_current_locus = start; |
| 1133 | start.nextc[0] = ' '; |
| 1134 | start.nextc[1] = ' '; |
| 1135 | continue; |
| 1136 | } |
| 1137 | } |
| 1138 | skip_comment_line (); |
| 1139 | continue; |
| 1140 | } |
| 1141 | |
| 1142 | if (gfc_option.flag_d_lines != -1 && (c == 'd' || c == 'D')) |
| 1143 | { |
| 1144 | if (gfc_option.flag_d_lines == 0) |
| 1145 | { |
| 1146 | skip_comment_line (); |
| 1147 | continue; |
| 1148 | } |
| 1149 | else |
| 1150 | *start.nextc = c = ' '; |
| 1151 | } |
| 1152 | |
| 1153 | col = 1; |
| 1154 | |
| 1155 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))) |
| 1156 | { |
| 1157 | c = next_char (); |
| 1158 | col++; |
| 1159 | } |
| 1160 | |
| 1161 | if (c == '\n') |
| 1162 | { |
| 1163 | gfc_advance_line (); |
| 1164 | continue; |
| 1165 | } |
| 1166 | |
| 1167 | if (col != 6 && c == '!') |
| 1168 | { |
| 1169 | if (gfc_current_locus.lb != NULL__null |
| 1170 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line ))) |
| 1171 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )); |
| 1172 | skip_comment_line (); |
| 1173 | continue; |
| 1174 | } |
| 1175 | |
| 1176 | break; |
| 1177 | } |
| 1178 | |
| 1179 | openmp_flag = 0; |
| 1180 | openacc_flag = 0; |
| 1181 | gcc_attribute_flag = 0; |
| 1182 | gfc_current_locus = start; |
| 1183 | } |
| 1184 | |
| 1185 | |
| 1186 | /* Skips the current line if it is a comment. */ |
| 1187 | |
| 1188 | void |
| 1189 | gfc_skip_comments (void) |
| 1190 | { |
| 1191 | if (gfc_current_form == FORM_FREE) |
| 1192 | skip_free_comments (); |
| 1193 | else |
| 1194 | skip_fixed_comments (); |
| 1195 | } |
| 1196 | |
| 1197 | |
| 1198 | /* Get the next character from the input, taking continuation lines |
| 1199 | and end-of-line comments into account. This implies that comment |
| 1200 | lines between continued lines must be eaten here. For higher-level |
| 1201 | subroutines, this flattens continued lines into a single logical |
| 1202 | line. The in_string flag denotes whether we're inside a character |
| 1203 | context or not. */ |
| 1204 | |
| 1205 | gfc_char_t |
| 1206 | gfc_next_char_literal (gfc_instring in_string) |
| 1207 | { |
| 1208 | locus old_loc; |
| 1209 | int i, prev_openmp_flag, prev_openacc_flag; |
| 1210 | gfc_char_t c; |
| 1211 | |
| 1212 | continue_flag = 0; |
| 1213 | prev_openacc_flag = prev_openmp_flag = 0; |
| 1214 | |
| 1215 | restart: |
| 1216 | c = next_char (); |
| 1217 | if (gfc_at_end ()) |
| 1218 | { |
| 1219 | continue_count = 0; |
| 1220 | return c; |
| 1221 | } |
| 1222 | |
| 1223 | if (gfc_current_form == FORM_FREE) |
| 1224 | { |
| 1225 | bool openmp_cond_flag; |
| 1226 | |
| 1227 | if (!in_string && c == '!') |
| 1228 | { |
| 1229 | if (gcc_attribute_flag |
| 1230 | && memcmp (&gfc_current_locus, &gcc_attribute_locus, |
| 1231 | sizeof (gfc_current_locus)) == 0) |
| 1232 | goto done; |
| 1233 | |
| 1234 | if (openmp_flag |
| 1235 | && memcmp (&gfc_current_locus, &openmp_locus, |
| 1236 | sizeof (gfc_current_locus)) == 0) |
| 1237 | goto done; |
| 1238 | |
| 1239 | if (openacc_flag |
| 1240 | && memcmp (&gfc_current_locus, &openacc_locus, |
| 1241 | sizeof (gfc_current_locus)) == 0) |
| 1242 | goto done; |
| 1243 | |
| 1244 | /* This line can't be continued */ |
| 1245 | do |
| 1246 | { |
| 1247 | c = next_char (); |
| 1248 | } |
| 1249 | while (c != '\n'); |
| 1250 | |
| 1251 | /* Avoid truncation warnings for comment ending lines. */ |
| 1252 | gfc_current_locus.lb->truncated = 0; |
| 1253 | |
| 1254 | goto done; |
| 1255 | } |
| 1256 | |
| 1257 | /* Check to see if the continuation line was truncated. */ |
| 1258 | if (warn_line_truncationglobal_options.x_warn_line_truncation && gfc_current_locus.lb != NULL__null |
| 1259 | && gfc_current_locus.lb->truncated) |
| 1260 | { |
| 1261 | int maxlen = flag_free_line_lengthglobal_options.x_flag_free_line_length; |
| 1262 | gfc_char_t *current_nextc = gfc_current_locus.nextc; |
| 1263 | |
| 1264 | gfc_current_locus.lb->truncated = 0; |
| 1265 | gfc_current_locus.nextc = gfc_current_locus.lb->line + maxlen; |
| 1266 | gfc_warning_now (OPT_Wline_truncation, |
| 1267 | "Line truncated at %L", &gfc_current_locus); |
| 1268 | gfc_current_locus.nextc = current_nextc; |
| 1269 | } |
| 1270 | |
| 1271 | if (c != '&') |
| 1272 | goto done; |
| 1273 | |
| 1274 | /* If the next nonblank character is a ! or \n, we've got a |
| 1275 | continuation line. */ |
| 1276 | old_loc = gfc_current_locus; |
| 1277 | |
| 1278 | c = next_char (); |
| 1279 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))) |
| 1280 | c = next_char (); |
| 1281 | |
| 1282 | /* Character constants to be continued cannot have commentary |
| 1283 | after the '&'. However, there are cases where we may think we |
| 1284 | are still in a string and we are looking for a possible |
| 1285 | doubled quote and we end up here. See PR64506. */ |
| 1286 | |
| 1287 | if (in_string && c != '\n') |
| 1288 | { |
| 1289 | gfc_current_locus = old_loc; |
| 1290 | c = '&'; |
| 1291 | goto done; |
| 1292 | } |
| 1293 | |
| 1294 | if (c != '!' && c != '\n') |
| 1295 | { |
| 1296 | gfc_current_locus = old_loc; |
| 1297 | c = '&'; |
| 1298 | goto done; |
| 1299 | } |
| 1300 | |
| 1301 | if (flag_openmpglobal_options.x_flag_openmp) |
| 1302 | prev_openmp_flag = openmp_flag; |
| 1303 | if (flag_openaccglobal_options.x_flag_openacc) |
| 1304 | prev_openacc_flag = openacc_flag; |
| 1305 | |
| 1306 | /* This can happen if the input file changed or via cpp's #line |
| 1307 | without getting reset (e.g. via input_stmt). It also happens |
| 1308 | when pre-including files via -fpre-include=. */ |
| 1309 | if (continue_count == 0 |
| 1310 | && gfc_current_locus.lb |
| 1311 | && continue_line > gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )) + 1) |
| 1312 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )) + 1; |
| 1313 | |
| 1314 | continue_flag = 1; |
| 1315 | if (c == '!') |
| 1316 | skip_comment_line (); |
| 1317 | else |
| 1318 | gfc_advance_line (); |
| 1319 | |
| 1320 | if (gfc_at_eof ()) |
| 1321 | goto not_continuation; |
| 1322 | |
| 1323 | /* We've got a continuation line. If we are on the very next line after |
| 1324 | the last continuation, increment the continuation line count and |
| 1325 | check whether the limit has been exceeded. */ |
| 1326 | if (gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )) == continue_line + 1) |
| 1327 | { |
| 1328 | if (++continue_count == gfc_option.max_continue_free) |
| 1329 | { |
| 1330 | if (gfc_notification_std (GFC_STD_GNU(1<<5)) || pedanticglobal_options.x_pedantic) |
| 1331 | gfc_warning (0, "Limit of %d continuations exceeded in " |
| 1332 | "statement at %C", gfc_option.max_continue_free); |
| 1333 | } |
| 1334 | } |
| 1335 | |
| 1336 | /* Now find where it continues. First eat any comment lines. */ |
| 1337 | openmp_cond_flag = skip_free_comments (); |
| 1338 | |
| 1339 | if (gfc_current_locus.lb != NULL__null |
| 1340 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line ))) |
| 1341 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )); |
| 1342 | |
| 1343 | if (flag_openmpglobal_options.x_flag_openmp) |
| 1344 | if (prev_openmp_flag != openmp_flag && !openacc_flag) |
| 1345 | { |
| 1346 | gfc_current_locus = old_loc; |
| 1347 | openmp_flag = prev_openmp_flag; |
| 1348 | c = '&'; |
| 1349 | goto done; |
| 1350 | } |
| 1351 | |
| 1352 | if (flag_openaccglobal_options.x_flag_openacc) |
| 1353 | if (prev_openacc_flag != openacc_flag && !openmp_flag) |
| 1354 | { |
| 1355 | gfc_current_locus = old_loc; |
| 1356 | openacc_flag = prev_openacc_flag; |
| 1357 | c = '&'; |
| 1358 | goto done; |
| 1359 | } |
| 1360 | |
| 1361 | /* Now that we have a non-comment line, probe ahead for the |
| 1362 | first non-whitespace character. If it is another '&', then |
| 1363 | reading starts at the next character, otherwise we must back |
| 1364 | up to where the whitespace started and resume from there. */ |
| 1365 | |
| 1366 | old_loc = gfc_current_locus; |
| 1367 | |
| 1368 | c = next_char (); |
| 1369 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))) |
| 1370 | c = next_char (); |
| 1371 | |
| 1372 | if (openmp_flag && !openacc_flag) |
| 1373 | { |
| 1374 | for (i = 0; i < 5; i++, c = next_char ()) |
| 1375 | { |
| 1376 | gcc_assert (gfc_wide_tolower (c) == (unsigned char) "!$omp"[i])((void)(!(gfc_wide_tolower (c) == (unsigned char) "!$omp"[i]) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/fortran/scanner.c" , 1376, __FUNCTION__), 0 : 0)); |
| 1377 | if (i == 4) |
| 1378 | old_loc = gfc_current_locus; |
| 1379 | } |
| 1380 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))) |
| 1381 | c = next_char (); |
| 1382 | } |
| 1383 | if (openacc_flag && !openmp_flag) |
| 1384 | { |
| 1385 | for (i = 0; i < 5; i++, c = next_char ()) |
| 1386 | { |
| 1387 | gcc_assert (gfc_wide_tolower (c) == (unsigned char) "!$acc"[i])((void)(!(gfc_wide_tolower (c) == (unsigned char) "!$acc"[i]) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/fortran/scanner.c" , 1387, __FUNCTION__), 0 : 0)); |
| 1388 | if (i == 4) |
| 1389 | old_loc = gfc_current_locus; |
| 1390 | } |
| 1391 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))) |
| 1392 | c = next_char (); |
| 1393 | } |
| 1394 | |
| 1395 | /* In case we have an OpenMP directive continued by OpenACC |
| 1396 | sentinel, or vice versa, we get both openmp_flag and |
| 1397 | openacc_flag on. */ |
| 1398 | |
| 1399 | if (openacc_flag && openmp_flag) |
| 1400 | { |
| 1401 | int is_openmp = 0; |
| 1402 | for (i = 0; i < 5; i++, c = next_char ()) |
| 1403 | { |
| 1404 | if (gfc_wide_tolower (c) != (unsigned char) "!$acc"[i]) |
| 1405 | is_openmp = 1; |
| 1406 | if (i == 4) |
| 1407 | old_loc = gfc_current_locus; |
| 1408 | } |
| 1409 | gfc_error (is_openmp |
| 1410 | ? G_("Wrong OpenACC continuation at %C: ""Wrong OpenACC continuation at %C: " "expected !$ACC, got !$OMP" |
| 1411 | "expected !$ACC, got !$OMP")"Wrong OpenACC continuation at %C: " "expected !$ACC, got !$OMP" |
| 1412 | : G_("Wrong OpenMP continuation at %C: ""Wrong OpenMP continuation at %C: " "expected !$OMP, got !$ACC" |
| 1413 | "expected !$OMP, got !$ACC")"Wrong OpenMP continuation at %C: " "expected !$OMP, got !$ACC"); |
| 1414 | } |
| 1415 | |
| 1416 | if (c != '&') |
| 1417 | { |
| 1418 | if (in_string && gfc_current_locus.nextc) |
| 1419 | { |
| 1420 | gfc_current_locus.nextc--; |
| 1421 | if (warn_ampersandglobal_options.x_warn_ampersand && in_string == INSTRING_WARN) |
| 1422 | gfc_warning (OPT_Wampersand, |
| 1423 | "Missing %<&%> in continued character " |
| 1424 | "constant at %C"); |
| 1425 | } |
| 1426 | else if (!in_string && (c == '\'' || c == '"')) |
| 1427 | goto done; |
| 1428 | /* Both !$omp and !$ -fopenmp continuation lines have & on the |
| 1429 | continuation line only optionally. */ |
| 1430 | else if (openmp_flag || openacc_flag || openmp_cond_flag) |
| 1431 | { |
| 1432 | if (gfc_current_locus.nextc) |
| 1433 | gfc_current_locus.nextc--; |
| 1434 | } |
| 1435 | else |
| 1436 | { |
| 1437 | c = ' '; |
| 1438 | gfc_current_locus = old_loc; |
| 1439 | goto done; |
| 1440 | } |
| 1441 | } |
| 1442 | } |
| 1443 | else /* Fixed form. */ |
| 1444 | { |
| 1445 | /* Fixed form continuation. */ |
| 1446 | if (in_string != INSTRING_WARN && c == '!') |
| 1447 | { |
| 1448 | /* Skip comment at end of line. */ |
| 1449 | do |
| 1450 | { |
| 1451 | c = next_char (); |
| 1452 | } |
| 1453 | while (c != '\n'); |
| 1454 | |
| 1455 | /* Avoid truncation warnings for comment ending lines. */ |
| 1456 | gfc_current_locus.lb->truncated = 0; |
| 1457 | } |
| 1458 | |
| 1459 | if (c != '\n') |
| 1460 | goto done; |
| 1461 | |
| 1462 | /* Check to see if the continuation line was truncated. */ |
| 1463 | if (warn_line_truncationglobal_options.x_warn_line_truncation && gfc_current_locus.lb != NULL__null |
| 1464 | && gfc_current_locus.lb->truncated) |
| 1465 | { |
| 1466 | gfc_current_locus.lb->truncated = 0; |
| 1467 | gfc_warning_now (OPT_Wline_truncation, |
| 1468 | "Line truncated at %L", &gfc_current_locus); |
| 1469 | } |
| 1470 | |
| 1471 | if (flag_openmpglobal_options.x_flag_openmp) |
| 1472 | prev_openmp_flag = openmp_flag; |
| 1473 | if (flag_openaccglobal_options.x_flag_openacc) |
| 1474 | prev_openacc_flag = openacc_flag; |
| 1475 | |
| 1476 | /* This can happen if the input file changed or via cpp's #line |
| 1477 | without getting reset (e.g. via input_stmt). It also happens |
| 1478 | when pre-including files via -fpre-include=. */ |
| 1479 | if (continue_count == 0 |
| 1480 | && gfc_current_locus.lb |
| 1481 | && continue_line > gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )) + 1) |
| 1482 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )) + 1; |
| 1483 | |
| 1484 | continue_flag = 1; |
| 1485 | old_loc = gfc_current_locus; |
| 1486 | |
| 1487 | gfc_advance_line (); |
| 1488 | skip_fixed_comments (); |
| 1489 | |
| 1490 | /* See if this line is a continuation line. */ |
| 1491 | if (flag_openmpglobal_options.x_flag_openmp && openmp_flag != prev_openmp_flag && !openacc_flag) |
| 1492 | { |
| 1493 | openmp_flag = prev_openmp_flag; |
| 1494 | goto not_continuation; |
| 1495 | } |
| 1496 | if (flag_openaccglobal_options.x_flag_openacc && openacc_flag != prev_openacc_flag && !openmp_flag) |
| 1497 | { |
| 1498 | openacc_flag = prev_openacc_flag; |
| 1499 | goto not_continuation; |
| 1500 | } |
| 1501 | |
| 1502 | /* In case we have an OpenMP directive continued by OpenACC |
| 1503 | sentinel, or vice versa, we get both openmp_flag and |
| 1504 | openacc_flag on. */ |
| 1505 | if (openacc_flag && openmp_flag) |
| 1506 | { |
| 1507 | int is_openmp = 0; |
| 1508 | for (i = 0; i < 5; i++) |
| 1509 | { |
| 1510 | c = next_char (); |
| 1511 | if (gfc_wide_tolower (c) != (unsigned char) "*$acc"[i]) |
| 1512 | is_openmp = 1; |
| 1513 | } |
| 1514 | gfc_error (is_openmp |
| 1515 | ? G_("Wrong OpenACC continuation at %C: ""Wrong OpenACC continuation at %C: " "expected !$ACC, got !$OMP" |
| 1516 | "expected !$ACC, got !$OMP")"Wrong OpenACC continuation at %C: " "expected !$ACC, got !$OMP" |
| 1517 | : G_("Wrong OpenMP continuation at %C: ""Wrong OpenMP continuation at %C: " "expected !$OMP, got !$ACC" |
| 1518 | "expected !$OMP, got !$ACC")"Wrong OpenMP continuation at %C: " "expected !$OMP, got !$ACC"); |
| 1519 | } |
| 1520 | else if (!openmp_flag && !openacc_flag) |
| 1521 | for (i = 0; i < 5; i++) |
| 1522 | { |
| 1523 | c = next_char (); |
| 1524 | if (c != ' ') |
| 1525 | goto not_continuation; |
| 1526 | } |
| 1527 | else if (openmp_flag) |
| 1528 | for (i = 0; i < 5; i++) |
| 1529 | { |
| 1530 | c = next_char (); |
| 1531 | if (gfc_wide_tolower (c) != (unsigned char) "*$omp"[i]) |
| 1532 | goto not_continuation; |
| 1533 | } |
| 1534 | else if (openacc_flag) |
| 1535 | for (i = 0; i < 5; i++) |
| 1536 | { |
| 1537 | c = next_char (); |
| 1538 | if (gfc_wide_tolower (c) != (unsigned char) "*$acc"[i]) |
| 1539 | goto not_continuation; |
| 1540 | } |
| 1541 | |
| 1542 | c = next_char (); |
| 1543 | if (c == '0' || c == ' ' || c == '\n') |
| 1544 | goto not_continuation; |
| 1545 | |
| 1546 | /* We've got a continuation line. If we are on the very next line after |
| 1547 | the last continuation, increment the continuation line count and |
| 1548 | check whether the limit has been exceeded. */ |
| 1549 | if (gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )) == continue_line + 1) |
| 1550 | { |
| 1551 | if (++continue_count == gfc_option.max_continue_fixed) |
| 1552 | { |
| 1553 | if (gfc_notification_std (GFC_STD_GNU(1<<5)) || pedanticglobal_options.x_pedantic) |
| 1554 | gfc_warning (0, "Limit of %d continuations exceeded in " |
| 1555 | "statement at %C", |
| 1556 | gfc_option.max_continue_fixed); |
| 1557 | } |
| 1558 | } |
| 1559 | |
| 1560 | if (gfc_current_locus.lb != NULL__null |
| 1561 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line ))) |
| 1562 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb)(((expand_location ((gfc_current_locus.lb)->location)).line )); |
| 1563 | } |
| 1564 | |
| 1565 | /* Ready to read first character of continuation line, which might |
| 1566 | be another continuation line! */ |
| 1567 | goto restart; |
| 1568 | |
| 1569 | not_continuation: |
| 1570 | c = '\n'; |
| 1571 | gfc_current_locus = old_loc; |
| 1572 | end_flag = 0; |
| 1573 | |
| 1574 | done: |
| 1575 | if (c == '\n') |
| 1576 | continue_count = 0; |
| 1577 | continue_flag = 0; |
| 1578 | return c; |
| 1579 | } |
| 1580 | |
| 1581 | |
| 1582 | /* Get the next character of input, folded to lowercase. In fixed |
| 1583 | form mode, we also ignore spaces. When matcher subroutines are |
| 1584 | parsing character literals, they have to call |
| 1585 | gfc_next_char_literal(). */ |
| 1586 | |
| 1587 | gfc_char_t |
| 1588 | gfc_next_char (void) |
| 1589 | { |
| 1590 | gfc_char_t c; |
| 1591 | |
| 1592 | do |
| 1593 | { |
| 1594 | c = gfc_next_char_literal (NONSTRING); |
| 1595 | } |
| 1596 | while (gfc_current_form == FORM_FIXED && gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))); |
| 1597 | |
| 1598 | return gfc_wide_tolower (c); |
| 1599 | } |
| 1600 | |
| 1601 | char |
| 1602 | gfc_next_ascii_char (void) |
| 1603 | { |
| 1604 | gfc_char_t c = gfc_next_char (); |
| 1605 | |
| 1606 | return (gfc_wide_fits_in_byte (c) ? (unsigned char) c |
| 1607 | : (unsigned char) UCHAR_MAX(127*2 +1)); |
| 1608 | } |
| 1609 | |
| 1610 | |
| 1611 | gfc_char_t |
| 1612 | gfc_peek_char (void) |
| 1613 | { |
| 1614 | locus old_loc; |
| 1615 | gfc_char_t c; |
| 1616 | |
| 1617 | old_loc = gfc_current_locus; |
| 1618 | c = gfc_next_char (); |
| 1619 | gfc_current_locus = old_loc; |
| 1620 | |
| 1621 | return c; |
| 1622 | } |
| 1623 | |
| 1624 | |
| 1625 | char |
| 1626 | gfc_peek_ascii_char (void) |
| 1627 | { |
| 1628 | gfc_char_t c = gfc_peek_char (); |
| 1629 | |
| 1630 | return (gfc_wide_fits_in_byte (c) ? (unsigned char) c |
| 1631 | : (unsigned char) UCHAR_MAX(127*2 +1)); |
| 1632 | } |
| 1633 | |
| 1634 | |
| 1635 | /* Recover from an error. We try to get past the current statement |
| 1636 | and get lined up for the next. The next statement follows a '\n' |
| 1637 | or a ';'. We also assume that we are not within a character |
| 1638 | constant, and deal with finding a '\'' or '"'. */ |
| 1639 | |
| 1640 | void |
| 1641 | gfc_error_recovery (void) |
| 1642 | { |
| 1643 | gfc_char_t c, delim; |
| 1644 | |
| 1645 | if (gfc_at_eof ()) |
| 1646 | return; |
| 1647 | |
| 1648 | for (;;) |
| 1649 | { |
| 1650 | c = gfc_next_char (); |
| 1651 | if (c == '\n' || c == ';') |
| 1652 | break; |
| 1653 | |
| 1654 | if (c != '\'' && c != '"') |
| 1655 | { |
| 1656 | if (gfc_at_eof ()) |
| 1657 | break; |
| 1658 | continue; |
| 1659 | } |
| 1660 | delim = c; |
| 1661 | |
| 1662 | for (;;) |
| 1663 | { |
| 1664 | c = next_char (); |
| 1665 | |
| 1666 | if (c == delim) |
| 1667 | break; |
| 1668 | if (c == '\n') |
| 1669 | return; |
| 1670 | if (c == '\\') |
| 1671 | { |
| 1672 | c = next_char (); |
| 1673 | if (c == '\n') |
| 1674 | return; |
| 1675 | } |
| 1676 | } |
| 1677 | if (gfc_at_eof ()) |
| 1678 | break; |
| 1679 | } |
| 1680 | } |
| 1681 | |
| 1682 | |
| 1683 | /* Read ahead until the next character to be read is not whitespace. */ |
| 1684 | |
| 1685 | void |
| 1686 | gfc_gobble_whitespace (void) |
| 1687 | { |
| 1688 | static int linenum = 0; |
| 1689 | locus old_loc; |
| 1690 | gfc_char_t c; |
| 1691 | |
| 1692 | do |
| 1693 | { |
| 1694 | old_loc = gfc_current_locus; |
| 1695 | c = gfc_next_char_literal (NONSTRING); |
| 1696 | /* Issue a warning for nonconforming tabs. We keep track of the line |
| 1697 | number because the Fortran matchers will often back up and the same |
| 1698 | line will be scanned multiple times. */ |
| 1699 | if (warn_tabsglobal_options.x_warn_tabs && c == '\t') |
| 1700 | { |
| 1701 | int cur_linenum = LOCATION_LINE (gfc_current_locus.lb->location)((expand_location (gfc_current_locus.lb->location)).line); |
| 1702 | if (cur_linenum != linenum) |
| 1703 | { |
| 1704 | linenum = cur_linenum; |
| 1705 | gfc_warning_now (OPT_Wtabs, "Nonconforming tab character at %C"); |
| 1706 | } |
| 1707 | } |
| 1708 | } |
| 1709 | while (gfc_is_whitespace (c)((c==' ') || (c=='\t') || (c=='\f'))); |
| 1710 | |
| 1711 | if (!ISPRINT(c)(_sch_istable[(c) & 0xff] & (unsigned short)(_sch_isprint )) && c != '\n' && last_error_char != gfc_current_locus.nextc) |
| 1712 | { |
| 1713 | char buf[20]; |
| 1714 | last_error_char = gfc_current_locus.nextc; |
| 1715 | snprintf (buf, 20, "%2.2X", c); |
| 1716 | gfc_error_now ("Invalid character 0x%s at %C", buf); |
| 1717 | } |
| 1718 | |
| 1719 | gfc_current_locus = old_loc; |
| 1720 | } |
| 1721 | |
| 1722 | |
| 1723 | /* Load a single line into pbuf. |
| 1724 | |
| 1725 | If pbuf points to a NULL pointer, it is allocated. |
| 1726 | We truncate lines that are too long, unless we're dealing with |
| 1727 | preprocessor lines or if the option -ffixed-line-length-none is set, |
| 1728 | in which case we reallocate the buffer to fit the entire line, if |
| 1729 | need be. |
| 1730 | In fixed mode, we expand a tab that occurs within the statement |
| 1731 | label region to expand to spaces that leave the next character in |
| 1732 | the source region. |
| 1733 | |
| 1734 | If first_char is not NULL, it's a pointer to a single char value holding |
| 1735 | the first character of the line, which has already been read by the |
| 1736 | caller. This avoids the use of ungetc(). |
| 1737 | |
| 1738 | load_line returns whether the line was truncated. |
| 1739 | |
| 1740 | NOTE: The error machinery isn't available at this point, so we can't |
| 1741 | easily report line and column numbers consistent with other |
| 1742 | parts of gfortran. */ |
| 1743 | |
| 1744 | static int |
| 1745 | load_line (FILE *input, gfc_char_t **pbuf, int *pbuflen, const int *first_char) |
| 1746 | { |
| 1747 | int c, maxlen, i, preprocessor_flag, buflen = *pbuflen; |
| 1748 | int quoted = ' ', comment_ix = -1; |
| 1749 | bool seen_comment = false; |
| 1750 | bool first_comment = true; |
| 1751 | bool trunc_flag = false; |
| 1752 | bool seen_printable = false; |
| 1753 | bool seen_ampersand = false; |
| 1754 | bool found_tab = false; |
| 1755 | bool warned_tabs = false; |
| 1756 | gfc_char_t *buffer; |
| 1757 | |
| 1758 | /* Determine the maximum allowed line length. */ |
| 1759 | if (gfc_current_form == FORM_FREE) |
| 1760 | maxlen = flag_free_line_lengthglobal_options.x_flag_free_line_length; |
| 1761 | else if (gfc_current_form == FORM_FIXED) |
| 1762 | maxlen = flag_fixed_line_lengthglobal_options.x_flag_fixed_line_length; |
| 1763 | else |
| 1764 | maxlen = 72; |
| 1765 | |
| 1766 | if (*pbuf == NULL__null) |
| 1767 | { |
| 1768 | /* Allocate the line buffer, storing its length into buflen. |
| 1769 | Note that if maxlen==0, indicating that arbitrary-length lines |
| 1770 | are allowed, the buffer will be reallocated if this length is |
| 1771 | insufficient; since 132 characters is the length of a standard |
| 1772 | free-form line, we use that as a starting guess. */ |
| 1773 | if (maxlen > 0) |
| 1774 | buflen = maxlen; |
| 1775 | else |
| 1776 | buflen = 132; |
| 1777 | |
| 1778 | *pbuf = gfc_get_wide_string (buflen + 1)((gfc_char_t *) xcalloc ((buflen + 1), sizeof (gfc_char_t))); |
| 1779 | } |
| 1780 | |
| 1781 | i = 0; |
| 1782 | buffer = *pbuf; |
| 1783 | |
| 1784 | if (first_char) |
| 1785 | c = *first_char; |
| 1786 | else |
| 1787 | c = getc (input); |
| 1788 | |
| 1789 | /* In order to not truncate preprocessor lines, we have to |
| 1790 | remember that this is one. */ |
| 1791 | preprocessor_flag = (c == '#'); |
| 1792 | |
| 1793 | for (;;) |
| 1794 | { |
| 1795 | if (c == EOF(-1)) |
| 1796 | break; |
| 1797 | |
| 1798 | if (c == '\n') |
| 1799 | { |
| 1800 | /* Check for illegal use of ampersand. See F95 Standard 3.3.1.3. */ |
| 1801 | if (gfc_current_form == FORM_FREE |
| 1802 | && !seen_printable && seen_ampersand) |
| 1803 | { |
| 1804 | if (pedanticglobal_options.x_pedantic) |
| 1805 | gfc_error_now ("%<&%> not allowed by itself in line %d", |
| 1806 | current_file->line); |
| 1807 | else |
| 1808 | gfc_warning_now (0, "%<&%> not allowed by itself in line %d", |
| 1809 | current_file->line); |
| 1810 | } |
| 1811 | break; |
| 1812 | } |
| 1813 | |
| 1814 | if (c == '\r' || c == '\0') |
| 1815 | goto next_char; /* Gobble characters. */ |
| 1816 | |
| 1817 | if (c == '&') |
| 1818 | { |
| 1819 | if (seen_ampersand) |
| 1820 | { |
| 1821 | seen_ampersand = false; |
| 1822 | seen_printable = true; |
| 1823 | } |
| 1824 | else |
| 1825 | seen_ampersand = true; |
| 1826 | } |
| 1827 | |
| 1828 | if ((c != '&' && c != '!' && c != ' ') || (c == '!' && !seen_ampersand)) |
| 1829 | seen_printable = true; |
| 1830 | |
| 1831 | /* Is this a fixed-form comment? */ |
| 1832 | if (gfc_current_form == FORM_FIXED && i == 0 |
| 1833 | && (c == '*' || c == 'c' || c == 'C' |
| 1834 | || (gfc_option.flag_d_lines != -1 && (c == 'd' || c == 'D')))) |
| 1835 | { |
| 1836 | seen_comment = true; |
| 1837 | comment_ix = i; |
| 1838 | } |
| 1839 | |
| 1840 | if (quoted == ' ') |
| 1841 | { |
| 1842 | if (c == '\'' || c == '"') |
| 1843 | quoted = c; |
| 1844 | } |
| 1845 | else if (c == quoted) |
| 1846 | quoted = ' '; |
| 1847 | |
| 1848 | /* Is this a free-form comment? */ |
| 1849 | if (c == '!' && quoted == ' ') |
| 1850 | { |
| 1851 | if (seen_comment) |
| 1852 | first_comment = false; |
| 1853 | seen_comment = true; |
| 1854 | comment_ix = i; |
| 1855 | } |
| 1856 | |
| 1857 | /* For truncation and tab warnings, set seen_comment to false if one has |
| 1858 | either an OpenMP or OpenACC directive - or a !GCC$ attribute. If |
| 1859 | OpenMP is enabled, use '!$' as as conditional compilation sentinel |
| 1860 | and OpenMP directive ('!$omp'). */ |
| 1861 | if (seen_comment && first_comment && flag_openmpglobal_options.x_flag_openmp && comment_ix + 1 == i |
| 1862 | && c == '$') |
| 1863 | first_comment = seen_comment = false; |
| 1864 | if (seen_comment && first_comment && comment_ix + 4 == i) |
| 1865 | { |
| 1866 | if (((*pbuf)[comment_ix+1] == 'g' || (*pbuf)[comment_ix+1] == 'G') |
| 1867 | && ((*pbuf)[comment_ix+2] == 'c' || (*pbuf)[comment_ix+2] == 'C') |
| 1868 | && ((*pbuf)[comment_ix+3] == 'c' || (*pbuf)[comment_ix+3] == 'C') |
| 1869 | && c == '$') |
| 1870 | first_comment = seen_comment = false; |
| 1871 | if (flag_openaccglobal_options.x_flag_openacc |
| 1872 | && (*pbuf)[comment_ix+1] == '$' |
| 1873 | && ((*pbuf)[comment_ix+2] == 'a' || (*pbuf)[comment_ix+2] == 'A') |
| 1874 | && ((*pbuf)[comment_ix+3] == 'c' || (*pbuf)[comment_ix+3] == 'C') |
| 1875 | && (c == 'c' || c == 'C')) |
| 1876 | first_comment = seen_comment = false; |
| 1877 | } |
| 1878 | |
| 1879 | /* Vendor extension: "<tab>1" marks a continuation line. */ |
| 1880 | if (found_tab) |
| 1881 | { |
| 1882 | found_tab = false; |
| 1883 | if (c >= '1' && c <= '9') |
| 1884 | { |
| 1885 | *(buffer-1) = c; |
| 1886 | goto next_char; |
| 1887 | } |
| 1888 | } |
| 1889 | |
| 1890 | if (gfc_current_form == FORM_FIXED && c == '\t' && i < 6) |
| 1891 | { |
| 1892 | found_tab = true; |
| 1893 | |
| 1894 | if (warn_tabsglobal_options.x_warn_tabs && seen_comment == 0 && !warned_tabs) |
| 1895 | { |
| 1896 | warned_tabs = true; |
| 1897 | gfc_warning_now (OPT_Wtabs, |
| 1898 | "Nonconforming tab character in column %d " |
| 1899 | "of line %d", i + 1, current_file->line); |
| 1900 | } |
| 1901 | |
| 1902 | while (i < 6) |
| 1903 | { |
| 1904 | *buffer++ = ' '; |
| 1905 | i++; |
| 1906 | } |
| 1907 | |
| 1908 | goto next_char; |
| 1909 | } |
| 1910 | |
| 1911 | *buffer++ = c; |
| 1912 | i++; |
| 1913 | |
| 1914 | if (maxlen == 0 || preprocessor_flag) |
| 1915 | { |
| 1916 | if (i >= buflen) |
| 1917 | { |
| 1918 | /* Reallocate line buffer to double size to hold the |
| 1919 | overlong line. */ |
| 1920 | buflen = buflen * 2; |
| 1921 | *pbuf = XRESIZEVEC (gfc_char_t, *pbuf, (buflen + 1))((gfc_char_t *) xrealloc ((void *) (*pbuf), sizeof (gfc_char_t ) * ((buflen + 1)))); |
| 1922 | buffer = (*pbuf) + i; |
| 1923 | } |
| 1924 | } |
| 1925 | else if (i >= maxlen) |
| 1926 | { |
| 1927 | bool trunc_warn = true; |
| 1928 | |
| 1929 | /* Enhancement, if the very next non-space character is an ampersand |
| 1930 | or comment that we would otherwise warn about, don't mark as |
| 1931 | truncated. */ |
| 1932 | |
| 1933 | /* Truncate the rest of the line. */ |
| 1934 | for (;;) |
| 1935 | { |
| 1936 | c = getc (input); |
| 1937 | if (c == '\r' || c == ' ') |
| 1938 | continue; |
| 1939 | |
| 1940 | if (c == '\n' || c == EOF(-1)) |
| 1941 | break; |
| 1942 | |
| 1943 | if (!trunc_warn && c != '!') |
| 1944 | trunc_warn = true; |
| 1945 | |
| 1946 | if (trunc_warn && ((gfc_current_form == FORM_FIXED && c == '&') |
| 1947 | || c == '!')) |
| 1948 | trunc_warn = false; |
| 1949 | |
| 1950 | if (c == '!') |
| 1951 | seen_comment = 1; |
| 1952 | |
| 1953 | if (trunc_warn && !seen_comment) |
| 1954 | trunc_flag = 1; |
| 1955 | } |
| 1956 | |
| 1957 | c = '\n'; |
| 1958 | continue; |
| 1959 | } |
| 1960 | |
| 1961 | next_char: |
| 1962 | c = getc (input); |
| 1963 | } |
| 1964 | |
| 1965 | /* Pad lines to the selected line length in fixed form. */ |
| 1966 | if (gfc_current_form == FORM_FIXED |
| 1967 | && flag_fixed_line_lengthglobal_options.x_flag_fixed_line_length != 0 |
| 1968 | && flag_pad_sourceglobal_options.x_flag_pad_source |
| 1969 | && !preprocessor_flag |
| 1970 | && c != EOF(-1)) |
| 1971 | { |
| 1972 | while (i++ < maxlen) |
| 1973 | *buffer++ = ' '; |
| 1974 | } |
| 1975 | |
| 1976 | *buffer = '\0'; |
| 1977 | *pbuflen = buflen; |
| 1978 | |
| 1979 | return trunc_flag; |
| 1980 | } |
| 1981 | |
| 1982 | |
| 1983 | /* Get a gfc_file structure, initialize it and add it to |
| 1984 | the file stack. */ |
| 1985 | |
| 1986 | static gfc_file * |
| 1987 | get_file (const char *name, enum lc_reason reason) |
| 1988 | { |
| 1989 | gfc_file *f; |
| 1990 | |
| 1991 | f = XCNEW (gfc_file)((gfc_file *) xcalloc (1, sizeof (gfc_file))); |
| 1992 | |
| 1993 | f->filename = xstrdup (name); |
| 1994 | |
| 1995 | f->next = file_head; |
| 1996 | file_head = f; |
| 1997 | |
| 1998 | f->up = current_file; |
| 1999 | if (current_file != NULL__null) |
| 2000 | f->inclusion_line = current_file->line; |
| 2001 | |
| 2002 | linemap_add (line_table, reason, false, f->filename, 1); |
| 2003 | |
| 2004 | return f; |
| 2005 | } |
| 2006 | |
| 2007 | |
| 2008 | /* Deal with a line from the C preprocessor. The |
| 2009 | initial octothorp has already been seen. */ |
| 2010 | |
| 2011 | static void |
| 2012 | preprocessor_line (gfc_char_t *c) |
| 2013 | { |
| 2014 | bool flag[5]; |
| 2015 | int i, line; |
| 2016 | gfc_char_t *wide_filename; |
| 2017 | gfc_file *f; |
| 2018 | int escaped, unescape; |
| 2019 | char *filename; |
| 2020 | |
| 2021 | c++; |
| 2022 | while (*c == ' ' || *c == '\t') |
| 2023 | c++; |
| 2024 | |
| 2025 | if (*c < '0' || *c > '9') |
| 2026 | goto bad_cpp_line; |
| 2027 | |
| 2028 | line = wide_atoi (c); |
| 2029 | |
| 2030 | c = wide_strchr (c, ' '); |
| 2031 | if (c == NULL__null) |
| 2032 | { |
| 2033 | /* No file name given. Set new line number. */ |
| 2034 | current_file->line = line; |
| 2035 | return; |
| 2036 | } |
| 2037 | |
| 2038 | /* Skip spaces. */ |
| 2039 | while (*c == ' ' || *c == '\t') |
| 2040 | c++; |
| 2041 | |
| 2042 | /* Skip quote. */ |
| 2043 | if (*c != '"') |
| 2044 | goto bad_cpp_line; |
| 2045 | ++c; |
| 2046 | |
| 2047 | wide_filename = c; |
| 2048 | |
| 2049 | /* Make filename end at quote. */ |
| 2050 | unescape = 0; |
| 2051 | escaped = false; |
| 2052 | while (*c && ! (!escaped && *c == '"')) |
| 2053 | { |
| 2054 | if (escaped) |
| 2055 | escaped = false; |
| 2056 | else if (*c == '\\') |
| 2057 | { |
| 2058 | escaped = true; |
| 2059 | unescape++; |
| 2060 | } |
| 2061 | ++c; |
| 2062 | } |
| 2063 | |
| 2064 | if (! *c) |
| 2065 | /* Preprocessor line has no closing quote. */ |
| 2066 | goto bad_cpp_line; |
| 2067 | |
| 2068 | *c++ = '\0'; |
| 2069 | |
| 2070 | /* Undo effects of cpp_quote_string. */ |
| 2071 | if (unescape) |
| 2072 | { |
| 2073 | gfc_char_t *s = wide_filename; |
| 2074 | gfc_char_t *d = gfc_get_wide_string (c - wide_filename - unescape)((gfc_char_t *) xcalloc ((c - wide_filename - unescape), sizeof (gfc_char_t))); |
| 2075 | |
| 2076 | wide_filename = d; |
| 2077 | while (*s) |
| 2078 | { |
| 2079 | if (*s == '\\') |
| 2080 | *d++ = *++s; |
| 2081 | else |
| 2082 | *d++ = *s; |
| 2083 | s++; |
| 2084 | } |
| 2085 | *d = '\0'; |
| 2086 | } |
| 2087 | |
| 2088 | /* Get flags. */ |
| 2089 | |
| 2090 | flag[1] = flag[2] = flag[3] = flag[4] = false; |
| 2091 | |
| 2092 | for (;;) |
| 2093 | { |
| 2094 | c = wide_strchr (c, ' '); |
| 2095 | if (c == NULL__null) |
| 2096 | break; |
| 2097 | |
| 2098 | c++; |
| 2099 | i = wide_atoi (c); |
| 2100 | |
| 2101 | if (i >= 1 && i <= 4) |
| 2102 | flag[i] = true; |
| 2103 | } |
| 2104 | |
| 2105 | /* Convert the filename in wide characters into a filename in narrow |
| 2106 | characters. */ |
| 2107 | filename = gfc_widechar_to_char (wide_filename, -1); |
| 2108 | |
| 2109 | /* Interpret flags. */ |
| 2110 | |
| 2111 | if (flag[1]) /* Starting new file. */ |
| 2112 | { |
| 2113 | f = get_file (filename, LC_RENAME); |
| 2114 | add_file_change (f->filename, f->inclusion_line); |
| 2115 | current_file = f; |
| 2116 | } |
| 2117 | |
| 2118 | if (flag[2]) /* Ending current file. */ |
| 2119 | { |
| 2120 | if (!current_file->up |
| 2121 | || filename_cmp (current_file->up->filename, filename) != 0) |
| 2122 | { |
| 2123 | linemap_line_start (line_table, current_file->line, 80); |
| 2124 | /* ??? One could compute the exact column where the filename |
| 2125 | starts and compute the exact location here. */ |
| 2126 | gfc_warning_now_at (linemap_position_for_column (line_table, 1), |
| 2127 | 0, "file %qs left but not entered", |
| 2128 | filename); |
| 2129 | current_file->line++; |
| 2130 | if (unescape) |
| 2131 | free (wide_filename); |
| 2132 | free (filename); |
| 2133 | return; |
| 2134 | } |
| 2135 | |
| 2136 | add_file_change (NULL__null, line); |
| 2137 | current_file = current_file->up; |
| 2138 | linemap_add (line_table, LC_RENAME, false, current_file->filename, |
| 2139 | current_file->line); |
| 2140 | } |
| 2141 | |
| 2142 | /* The name of the file can be a temporary file produced by |
| 2143 | cpp. Replace the name if it is different. */ |
| 2144 | |
| 2145 | if (filename_cmp (current_file->filename, filename) != 0) |
| 2146 | { |
| 2147 | /* FIXME: we leak the old filename because a pointer to it may be stored |
| 2148 | in the linemap. Alternative could be using GC or updating linemap to |
| 2149 | point to the new name, but there is no API for that currently. */ |
| 2150 | current_file->filename = xstrdup (filename); |
| 2151 | |
| 2152 | /* We need to tell the linemap API that the filename changed. Just |
| 2153 | changing current_file is insufficient. */ |
| 2154 | linemap_add (line_table, LC_RENAME, false, current_file->filename, line); |
| 2155 | } |
| 2156 | |
| 2157 | /* Set new line number. */ |
| 2158 | current_file->line = line; |
| 2159 | if (unescape) |
| 2160 | free (wide_filename); |
| 2161 | free (filename); |
| 2162 | return; |
| 2163 | |
| 2164 | bad_cpp_line: |
| 2165 | linemap_line_start (line_table, current_file->line, 80); |
| 2166 | /* ??? One could compute the exact column where the directive |
| 2167 | starts and compute the exact location here. */ |
| 2168 | gfc_warning_now_at (linemap_position_for_column (line_table, 2), 0, |
| 2169 | "Illegal preprocessor directive"); |
| 2170 | current_file->line++; |
| 2171 | } |
| 2172 | |
| 2173 | |
| 2174 | static bool load_file (const char *, const char *, bool); |
| 2175 | |
| 2176 | /* include_line()-- Checks a line buffer to see if it is an include |
| 2177 | line. If so, we call load_file() recursively to load the included |
| 2178 | file. We never return a syntax error because a statement like |
| 2179 | "include = 5" is perfectly legal. We return 0 if no include was |
| 2180 | processed, 1 if we matched an include or -1 if include was |
| 2181 | partially processed, but will need continuation lines. */ |
| 2182 | |
| 2183 | static int |
| 2184 | include_line (gfc_char_t *line) |
| 2185 | { |
| 2186 | gfc_char_t quote, *c, *begin, *stop; |
| 2187 | char *filename; |
| 2188 | const char *include = "include"; |
| 2189 | bool allow_continuation = flag_dec_includeglobal_options.x_flag_dec_include; |
| 2190 | int i; |
| 2191 | |
| 2192 | c = line; |
| 2193 | |
| 2194 | if (flag_openmpglobal_options.x_flag_openmp || flag_openmp_simdglobal_options.x_flag_openmp_simd) |
| 2195 | { |
| 2196 | if (gfc_current_form == FORM_FREE) |
| 2197 | { |
| 2198 | while (*c == ' ' || *c == '\t') |
| 2199 | c++; |
| 2200 | if (*c == '!' && c[1] == '$' && (c[2] == ' ' || c[2] == '\t')) |
| 2201 | c += 3; |
| 2202 | } |
| 2203 | else |
| 2204 | { |
| 2205 | if ((*c == '!' || *c == 'c' || *c == 'C' || *c == '*') |
| 2206 | && c[1] == '$' && c[2] == ' ') |
| 2207 | c += 3; |
| 2208 | } |
| 2209 | } |
| 2210 | |
| 2211 | if (gfc_current_form == FORM_FREE) |
| 2212 | { |
| 2213 | while (*c == ' ' || *c == '\t') |
| 2214 | c++; |
| 2215 | if (gfc_wide_strncasecmp (c, "include", 7)) |
| 2216 | { |
| 2217 | if (!allow_continuation) |
| 2218 | return 0; |
| 2219 | for (i = 0; i < 7; ++i) |
| 2220 | { |
| 2221 | gfc_char_t c1 = gfc_wide_tolower (*c); |
| 2222 | if (c1 != (unsigned char) include[i]) |
| 2223 | break; |
| 2224 | c++; |
| 2225 | } |
| 2226 | if (i == 0 || *c != '&') |
| 2227 | return 0; |
| 2228 | c++; |
| 2229 | while (*c == ' ' || *c == '\t') |
| 2230 | c++; |
| 2231 | if (*c == '\0' || *c == '!') |
| 2232 | return -1; |
| 2233 | return 0; |
| 2234 | } |
| 2235 | |
| 2236 | c += 7; |
| 2237 | } |
| 2238 | else |
| 2239 | { |
| 2240 | while (*c == ' ' || *c == '\t') |
| 2241 | c++; |
| 2242 | if (flag_dec_includeglobal_options.x_flag_dec_include && *c == '0' && c - line == 5) |
| 2243 | { |
| 2244 | c++; |
| 2245 | while (*c == ' ' || *c == '\t') |
| 2246 | c++; |
| 2247 | } |
| 2248 | if (c - line < 6) |
| 2249 | allow_continuation = false; |
| 2250 | for (i = 0; i < 7; ++i) |
| 2251 | { |
| 2252 | gfc_char_t c1 = gfc_wide_tolower (*c); |
| 2253 | if (c1 != (unsigned char) include[i]) |
| 2254 | break; |
| 2255 | c++; |
| 2256 | while (*c == ' ' || *c == '\t') |
| 2257 | c++; |
| 2258 | } |
| 2259 | if (!allow_continuation) |
| 2260 | { |
| 2261 | if (i != 7) |
| 2262 | return 0; |
| 2263 | } |
| 2264 | else if (i != 7) |
| 2265 | { |
| 2266 | if (i == 0) |
| 2267 | return 0; |
| 2268 | |
| 2269 | /* At the end of line or comment this might be continued. */ |
| 2270 | if (*c == '\0' || *c == '!') |
| 2271 | return -1; |
| 2272 | |
| 2273 | return 0; |
| 2274 | } |
| 2275 | } |
| 2276 | |
| 2277 | while (*c == ' ' || *c == '\t') |
| 2278 | c++; |
| 2279 | |
| 2280 | /* Find filename between quotes. */ |
| 2281 | |
| 2282 | quote = *c++; |
| 2283 | if (quote != '"' && quote != '\'') |
| 2284 | { |
| 2285 | if (allow_continuation) |
| 2286 | { |
| 2287 | if (gfc_current_form == FORM_FREE) |
| 2288 | { |
| 2289 | if (quote == '&') |
| 2290 | { |
| 2291 | while (*c == ' ' || *c == '\t') |
| 2292 | c++; |
| 2293 | if (*c == '\0' || *c == '!') |
| 2294 | return -1; |
| 2295 | } |
| 2296 | } |
| 2297 | else if (quote == '\0' || quote == '!') |
| 2298 | return -1; |
| 2299 | } |
| 2300 | return 0; |
| 2301 | } |
| 2302 | |
| 2303 | begin = c; |
| 2304 | |
| 2305 | bool cont = false; |
| 2306 | while (*c != quote && *c != '\0') |
| 2307 | { |
| 2308 | if (allow_continuation && gfc_current_form == FORM_FREE) |
| 2309 | { |
| 2310 | if (*c == '&') |
| 2311 | cont = true; |
| 2312 | else if (*c != ' ' && *c != '\t') |
| 2313 | cont = false; |
| 2314 | } |
| 2315 | c++; |
| 2316 | } |
| 2317 | |
| 2318 | if (*c == '\0') |
| 2319 | { |
| 2320 | if (allow_continuation |
| 2321 | && (cont || gfc_current_form != FORM_FREE)) |
| 2322 | return -1; |
| 2323 | return 0; |
| 2324 | } |
| 2325 | |
| 2326 | stop = c++; |
| 2327 | |
| 2328 | while (*c == ' ' || *c == '\t') |
| 2329 | c++; |
| 2330 | |
| 2331 | if (*c != '\0' && *c != '!') |
| 2332 | return 0; |
| 2333 | |
| 2334 | /* We have an include line at this point. */ |
| 2335 | |
| 2336 | *stop = '\0'; /* It's ok to trash the buffer, as this line won't be |
| 2337 | read by anything else. */ |
| 2338 | |
| 2339 | filename = gfc_widechar_to_char (begin, -1); |
| 2340 | if (!load_file (filename, NULL__null, false)) |
| 2341 | exit (FATAL_EXIT_CODE1); |
| 2342 | |
| 2343 | free (filename); |
| 2344 | return 1; |
| 2345 | } |
| 2346 | |
| 2347 | /* Similarly, but try to parse an INCLUDE statement, using gfc_next_char etc. |
| 2348 | APIs. Return 1 if recognized as valid INCLUDE statement and load_file has |
| 2349 | been called, 0 if it is not a valid INCLUDE statement and -1 if eof has |
| 2350 | been encountered while parsing it. */ |
| 2351 | static int |
| 2352 | include_stmt (gfc_linebuf *b) |
| 2353 | { |
| 2354 | int ret = 0, i, length; |
| 2355 | const char *include = "include"; |
| 2356 | gfc_char_t c, quote = 0; |
| 2357 | locus str_locus; |
| 2358 | char *filename; |
| 2359 | |
| 2360 | continue_flag = 0; |
| 2361 | end_flag = 0; |
| 2362 | gcc_attribute_flag = 0; |
| 2363 | openmp_flag = 0; |
| 2364 | openacc_flag = 0; |
| 2365 | continue_count = 0; |
| 2366 | continue_line = 0; |
| 2367 | gfc_current_locus.lb = b; |
| 2368 | gfc_current_locus.nextc = b->line; |
| 2369 | |
| 2370 | gfc_skip_comments (); |
| 2371 | gfc_gobble_whitespace (); |
| 2372 | |
| 2373 | for (i = 0; i < 7; i++) |
| 2374 | { |
| 2375 | c = gfc_next_char (); |
| 2376 | if (c != (unsigned char) include[i]) |
| 2377 | { |
| 2378 | if (gfc_current_form == FORM_FIXED |
| 2379 | && i == 0 |
| 2380 | && c == '0' |
| 2381 | && gfc_current_locus.nextc == b->line + 6) |
| 2382 | { |
| 2383 | gfc_gobble_whitespace (); |
| 2384 | i--; |
| 2385 | continue; |
| 2386 | } |
| 2387 | gcc_assert (i != 0)((void)(!(i != 0) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/fortran/scanner.c" , 2387, __FUNCTION__), 0 : 0)); |
| 2388 | if (c == '\n') |
| 2389 | { |
| 2390 | gfc_advance_line (); |
| 2391 | gfc_skip_comments (); |
| 2392 | if (gfc_at_eof ()) |
| 2393 | ret = -1; |
| 2394 | } |
| 2395 | goto do_ret; |
| 2396 | } |
| 2397 | } |
| 2398 | gfc_gobble_whitespace (); |
| 2399 | |
| 2400 | c = gfc_next_char (); |
| 2401 | if (c == '\'' || c == '"') |
| 2402 | quote = c; |
| 2403 | else |
| 2404 | { |
| 2405 | if (c == '\n') |
| 2406 | { |
| 2407 | gfc_advance_line (); |
| 2408 | gfc_skip_comments (); |
| 2409 | if (gfc_at_eof ()) |
| 2410 | ret = -1; |
| 2411 | } |
| 2412 | goto do_ret; |
| 2413 | } |
| 2414 | |
| 2415 | str_locus = gfc_current_locus; |
| 2416 | length = 0; |
| 2417 | do |
| 2418 | { |
| 2419 | c = gfc_next_char_literal (INSTRING_NOWARN); |
| 2420 | if (c == quote) |
| 2421 | break; |
| 2422 | if (c == '\n') |
| 2423 | { |
| 2424 | gfc_advance_line (); |
| 2425 | gfc_skip_comments (); |
| 2426 | if (gfc_at_eof ()) |
| 2427 | ret = -1; |
| 2428 | goto do_ret; |
| 2429 | } |
| 2430 | length++; |
| 2431 | } |
| 2432 | while (1); |
| 2433 | |
| 2434 | gfc_gobble_whitespace (); |
| 2435 | c = gfc_next_char (); |
| 2436 | if (c != '\n') |
| 2437 | goto do_ret; |
| 2438 | |
| 2439 | gfc_current_locus = str_locus; |
| 2440 | ret = 1; |
| 2441 | filename = XNEWVEC (char, length + 1)((char *) xmalloc (sizeof (char) * (length + 1))); |
| 2442 | for (i = 0; i < length; i++) |
| 2443 | { |
| 2444 | c = gfc_next_char_literal (INSTRING_WARN); |
| 2445 | gcc_assert (gfc_wide_fits_in_byte (c))((void)(!(gfc_wide_fits_in_byte (c)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/fortran/scanner.c" , 2445, __FUNCTION__), 0 : 0)); |
| 2446 | filename[i] = (unsigned char) c; |
| 2447 | } |
| 2448 | filename[length] = '\0'; |
| 2449 | if (!load_file (filename, NULL__null, false)) |
| 2450 | exit (FATAL_EXIT_CODE1); |
| 2451 | |
| 2452 | free (filename); |
| 2453 | |
| 2454 | do_ret: |
| 2455 | continue_flag = 0; |
| 2456 | end_flag = 0; |
| 2457 | gcc_attribute_flag = 0; |
| 2458 | openmp_flag = 0; |
| 2459 | openacc_flag = 0; |
| 2460 | continue_count = 0; |
| 2461 | continue_line = 0; |
| 2462 | memset (&gfc_current_locus, '\0', sizeof (locus)); |
| 2463 | memset (&openmp_locus, '\0', sizeof (locus)); |
| 2464 | memset (&openacc_locus, '\0', sizeof (locus)); |
| 2465 | memset (&gcc_attribute_locus, '\0', sizeof (locus)); |
| 2466 | return ret; |
| 2467 | } |
| 2468 | |
| 2469 | /* Load a file into memory by calling load_line until the file ends. */ |
| 2470 | |
| 2471 | static bool |
| 2472 | load_file (const char *realfilename, const char *displayedname, bool initial) |
| 2473 | { |
| 2474 | gfc_char_t *line; |
| 2475 | gfc_linebuf *b, *include_b = NULL__null; |
| 2476 | gfc_file *f; |
| 2477 | FILE *input; |
| 2478 | int len, line_len; |
| 2479 | bool first_line; |
| 2480 | struct stat st; |
| 2481 | int stat_result; |
| 2482 | const char *filename; |
| 2483 | /* If realfilename and displayedname are different and non-null then |
| 2484 | surely realfilename is the preprocessed form of |
| 2485 | displayedname. */ |
| 2486 | bool preprocessed_p = (realfilename && displayedname |
| 2487 | && strcmp (realfilename, displayedname)); |
| 2488 | |
| 2489 | filename = displayedname ? displayedname : realfilename; |
| 2490 | |
| 2491 | for (f = current_file; f; f = f->up) |
| 2492 | if (filename_cmp (filename, f->filename) == 0) |
| 2493 | { |
| 2494 | fprintf (stderrstderr, "%s:%d: Error: File '%s' is being included " |
| 2495 | "recursively\n", current_file->filename, current_file->line, |
| 2496 | filename); |
| 2497 | return false; |
| 2498 | } |
| 2499 | |
| 2500 | if (initial) |
| 2501 | { |
| 2502 | if (gfc_src_file) |
| 2503 | { |
| 2504 | input = gfc_src_file; |
| 2505 | gfc_src_file = NULL__null; |
| 2506 | } |
| 2507 | else |
| 2508 | input = gfc_open_file (realfilename); |
| 2509 | |
| 2510 | if (input == NULL__null) |
| 2511 | { |
| 2512 | gfc_error_now ("Cannot open file %qs", filename); |
| 2513 | return false; |
| 2514 | } |
| 2515 | } |
| 2516 | else |
| 2517 | { |
| 2518 | input = gfc_open_included_file (realfilename, false, false); |
| 2519 | if (input == NULL__null) |
| 2520 | { |
| 2521 | /* For -fpre-include file, current_file is NULL. */ |
| 2522 | if (current_file) |
| 2523 | fprintf (stderrstderr, "%s:%d: Error: Can't open included file '%s'\n", |
| 2524 | current_file->filename, current_file->line, filename); |
| 2525 | else |
| 2526 | fprintf (stderrstderr, "Error: Can't open pre-included file '%s'\n", |
| 2527 | filename); |
| 2528 | |
| 2529 | return false; |
| 2530 | } |
| 2531 | stat_result = stat (realfilename, &st); |
| 2532 | if (stat_result == 0 && !S_ISREG(st.st_mode)((((st.st_mode)) & 0170000) == (0100000))) |
| 2533 | { |
| 2534 | fprintf (stderrstderr, "%s:%d: Error: Included path '%s'" |
| 2535 | " is not a regular file\n", |
| 2536 | current_file->filename, current_file->line, filename); |
| 2537 | fclose (input); |
| 2538 | return false; |
| 2539 | } |
| 2540 | } |
| 2541 | |
| 2542 | /* Load the file. |
| 2543 | |
| 2544 | A "non-initial" file means a file that is being included. In |
| 2545 | that case we are creating an LC_ENTER map. |
| 2546 | |
| 2547 | An "initial" file means a main file; one that is not included. |
| 2548 | That file has already got at least one (surely more) line map(s) |
| 2549 | created by gfc_init. So the subsequent map created in that case |
| 2550 | must have LC_RENAME reason. |
| 2551 | |
| 2552 | This latter case is not true for a preprocessed file. In that |
| 2553 | case, although the file is "initial", the line maps created by |
| 2554 | gfc_init was used during the preprocessing of the file. Now that |
| 2555 | the preprocessing is over and we are being fed the result of that |
| 2556 | preprocessing, we need to create a brand new line map for the |
| 2557 | preprocessed file, so the reason is going to be LC_ENTER. */ |
| 2558 | |
| 2559 | f = get_file (filename, (initial && !preprocessed_p) ? LC_RENAME : LC_ENTER); |
| 2560 | if (!initial) |
| 2561 | add_file_change (f->filename, f->inclusion_line); |
| 2562 | current_file = f; |
| 2563 | current_file->line = 1; |
| 2564 | line = NULL__null; |
| 2565 | line_len = 0; |
| 2566 | first_line = true; |
| 2567 | |
| 2568 | if (initial && gfc_src_preprocessor_lines[0]) |
| 2569 | { |
| 2570 | preprocessor_line (gfc_src_preprocessor_lines[0]); |
| 2571 | free (gfc_src_preprocessor_lines[0]); |
| 2572 | gfc_src_preprocessor_lines[0] = NULL__null; |
| 2573 | if (gfc_src_preprocessor_lines[1]) |
| 2574 | { |
| 2575 | preprocessor_line (gfc_src_preprocessor_lines[1]); |
| 2576 | free (gfc_src_preprocessor_lines[1]); |
| 2577 | gfc_src_preprocessor_lines[1] = NULL__null; |
| 2578 | } |
| 2579 | } |
| 2580 | |
| 2581 | for (;;) |
| 2582 | { |
| 2583 | int trunc = load_line (input, &line, &line_len, NULL__null); |
| 2584 | int inc_line; |
| 2585 | |
| 2586 | len = gfc_wide_strlen (line); |
| 2587 | if (feof (input) && len == 0) |
| 2588 | break; |
| 2589 | |
| 2590 | /* If this is the first line of the file, it can contain a byte |
| 2591 | order mark (BOM), which we will ignore: |
| 2592 | FF FE is UTF-16 little endian, |
| 2593 | FE FF is UTF-16 big endian, |
| 2594 | EF BB BF is UTF-8. */ |
| 2595 | if (first_line |
| 2596 | && ((line_len >= 2 && line[0] == (unsigned char) '\xFF' |
| 2597 | && line[1] == (unsigned char) '\xFE') |
| 2598 | || (line_len >= 2 && line[0] == (unsigned char) '\xFE' |
| 2599 | && line[1] == (unsigned char) '\xFF') |
| 2600 | || (line_len >= 3 && line[0] == (unsigned char) '\xEF' |
| 2601 | && line[1] == (unsigned char) '\xBB' |
| 2602 | && line[2] == (unsigned char) '\xBF'))) |
| 2603 | { |
| 2604 | int n = line[1] == (unsigned char) '\xBB' ? 3 : 2; |
| 2605 | gfc_char_t *new_char = gfc_get_wide_string (line_len)((gfc_char_t *) xcalloc ((line_len), sizeof (gfc_char_t))); |
| 2606 | |
| 2607 | wide_strcpy (new_char, &line[n]); |
| 2608 | free (line); |
| 2609 | line = new_char; |
| 2610 | len -= n; |
| 2611 | } |
| 2612 | |
| 2613 | /* There are three things this line can be: a line of Fortran |
| 2614 | source, an include line or a C preprocessor directive. */ |
| 2615 | |
| 2616 | if (line[0] == '#') |
| 2617 | { |
| 2618 | /* When -g3 is specified, it's possible that we emit #define |
| 2619 | and #undef lines, which we need to pass to the middle-end |
| 2620 | so that it can emit correct debug info. */ |
| 2621 | if (debug_info_levelglobal_options.x_debug_info_level == DINFO_LEVEL_VERBOSE |
| 2622 | && (wide_strncmp (line, "#define ", 8) == 0 |
| 2623 | || wide_strncmp (line, "#undef ", 7) == 0)) |
| 2624 | ; |
| 2625 | else |
| 2626 | { |
| 2627 | preprocessor_line (line); |
| 2628 | continue; |
| 2629 | } |
| 2630 | } |
| 2631 | |
| 2632 | /* Preprocessed files have preprocessor lines added before the byte |
| 2633 | order mark, so first_line is not about the first line of the file |
| 2634 | but the first line that's not a preprocessor line. */ |
| 2635 | first_line = false; |
| 2636 | |
| 2637 | inc_line = include_line (line); |
| 2638 | if (inc_line > 0) |
| 2639 | { |
| 2640 | current_file->line++; |
| 2641 | continue; |
| 2642 | } |
| 2643 | |
| 2644 | /* Add line. */ |
| 2645 | |
| 2646 | b = XCNEWVAR (gfc_linebuf, gfc_linebuf_header_size((gfc_linebuf *) xcalloc (1, ((__builtin_offsetof(gfc_linebuf , line)) + (len + 1) * sizeof (gfc_char_t)))) |
| 2647 | + (len + 1) * sizeof (gfc_char_t))((gfc_linebuf *) xcalloc (1, ((__builtin_offsetof(gfc_linebuf , line)) + (len + 1) * sizeof (gfc_char_t)))); |
| 2648 | |
| 2649 | |
| 2650 | b->location |
| 2651 | = linemap_line_start (line_table, current_file->line++, len); |
| 2652 | /* ??? We add the location for the maximum column possible here, |
| 2653 | because otherwise if the next call creates a new line-map, it |
| 2654 | will not reserve space for any offset. */ |
| 2655 | if (len > 0) |
| 2656 | linemap_position_for_column (line_table, len); |
| 2657 | |
| 2658 | b->file = current_file; |
| 2659 | b->truncated = trunc; |
| 2660 | wide_strcpy (b->line, line); |
| 2661 | |
| 2662 | if (line_head == NULL__null) |
| 2663 | line_head = b; |
| 2664 | else |
| 2665 | line_tail->next = b; |
| 2666 | |
| 2667 | line_tail = b; |
| 2668 | |
| 2669 | while (file_changes_cur < file_changes_count) |
| 2670 | file_changes[file_changes_cur++].lb = b; |
| 2671 | |
| 2672 | if (flag_dec_includeglobal_options.x_flag_dec_include) |
| 2673 | { |
| 2674 | if (include_b && b != include_b) |
| 2675 | { |
| 2676 | int inc_line2 = include_stmt (include_b); |
| 2677 | if (inc_line2 == 0) |
| 2678 | include_b = NULL__null; |
| 2679 | else if (inc_line2 > 0) |
| 2680 | { |
| 2681 | do |
| 2682 | { |
| 2683 | if (gfc_current_form == FORM_FIXED) |
| 2684 | { |
| 2685 | for (gfc_char_t *p = include_b->line; *p; p++) |
| 2686 | *p = ' '; |
| 2687 | } |
| 2688 | else |
| 2689 | include_b->line[0] = '\0'; |
| 2690 | if (include_b == b) |
| 2691 | break; |
| 2692 | include_b = include_b->next; |
| 2693 | } |
| 2694 | while (1); |
| 2695 | include_b = NULL__null; |
| 2696 | } |
| 2697 | } |
| 2698 | if (inc_line == -1 && !include_b) |
| 2699 | include_b = b; |
| 2700 | } |
| 2701 | } |
| 2702 | |
| 2703 | /* Release the line buffer allocated in load_line. */ |
| 2704 | free (line); |
| 2705 | |
| 2706 | fclose (input); |
| 2707 | |
| 2708 | if (!initial) |
| 2709 | add_file_change (NULL__null, current_file->inclusion_line + 1); |
| 2710 | current_file = current_file->up; |
| 2711 | linemap_add (line_table, LC_LEAVE, 0, NULL__null, 0); |
| 2712 | return true; |
| 2713 | } |
| 2714 | |
| 2715 | |
| 2716 | /* Open a new file and start scanning from that file. Returns true |
| 2717 | if everything went OK, false otherwise. If form == FORM_UNKNOWN |
| 2718 | it tries to determine the source form from the filename, defaulting |
| 2719 | to free form. */ |
| 2720 | |
| 2721 | bool |
| 2722 | gfc_new_file (void) |
| 2723 | { |
| 2724 | bool result; |
| 2725 | |
| 2726 | if (flag_pre_includeglobal_options.x_flag_pre_include != NULL__null |
| 2727 | && !load_file (flag_pre_includeglobal_options.x_flag_pre_include, NULL__null, false)) |
| 2728 | exit (FATAL_EXIT_CODE1); |
| 2729 | |
| 2730 | if (gfc_cpp_enabled ()) |
| 2731 | { |
| 2732 | result = gfc_cpp_preprocess (gfc_source_file); |
| 2733 | if (!gfc_cpp_preprocess_only ()) |
| 2734 | result = load_file (gfc_cpp_temporary_file (), gfc_source_file, true); |
| 2735 | } |
| 2736 | else |
| 2737 | result = load_file (gfc_source_file, NULL__null, true); |
| 2738 | |
| 2739 | gfc_current_locus.lb = line_head; |
| 2740 | gfc_current_locus.nextc = (line_head == NULL__null) ? NULL__null : line_head->line; |
| 2741 | |
| 2742 | #if 0 /* Debugging aid. */ |
| 2743 | for (; line_head; line_head = line_head->next) |
| 2744 | printf ("%s:%3d %s\n", LOCATION_FILE (line_head->location)((expand_location (line_head->location)).file), |
| 2745 | LOCATION_LINE (line_head->location)((expand_location (line_head->location)).line), line_head->line); |
| 2746 | |
| 2747 | exit (SUCCESS_EXIT_CODE0); |
| 2748 | #endif |
| 2749 | |
| 2750 | return result; |
| 2751 | } |
| 2752 | |
| 2753 | static char * |
| 2754 | unescape_filename (const char *ptr) |
| 2755 | { |
| 2756 | const char *p = ptr, *s; |
| 2757 | char *d, *ret; |
| 2758 | int escaped, unescape = 0; |
| 2759 | |
| 2760 | /* Make filename end at quote. */ |
| 2761 | escaped = false; |
| 2762 | while (*p && ! (! escaped && *p == '"')) |
| 2763 | { |
| 2764 | if (escaped) |
| 2765 | escaped = false; |
| 2766 | else if (*p == '\\') |
| 2767 | { |
| 2768 | escaped = true; |
| 2769 | unescape++; |
| 2770 | } |
| 2771 | ++p; |
| 2772 | } |
| 2773 | |
| 2774 | if (!*p || p[1]) |
| 2775 | return NULL__null; |
| 2776 | |
| 2777 | /* Undo effects of cpp_quote_string. */ |
| 2778 | s = ptr; |
| 2779 | d = XCNEWVEC (char, p + 1 - ptr - unescape)((char *) xcalloc ((p + 1 - ptr - unescape), sizeof (char))); |
| 2780 | ret = d; |
| 2781 | |
| 2782 | while (s != p) |
| 2783 | { |
| 2784 | if (*s == '\\') |
| 2785 | *d++ = *++s; |
| 2786 | else |
| 2787 | *d++ = *s; |
| 2788 | s++; |
| 2789 | } |
| 2790 | *d = '\0'; |
| 2791 | return ret; |
| 2792 | } |
| 2793 | |
| 2794 | /* For preprocessed files, if the first tokens are of the form # NUM. |
| 2795 | handle the directives so we know the original file name. */ |
| 2796 | |
| 2797 | const char * |
| 2798 | gfc_read_orig_filename (const char *filename, const char **canon_source_file) |
| 2799 | { |
| 2800 | int c, len; |
| 2801 | char *dirname, *tmp; |
| 2802 | |
| 2803 | gfc_src_file = gfc_open_file (filename); |
| 2804 | if (gfc_src_file == NULL__null) |
| 2805 | return NULL__null; |
| 2806 | |
| 2807 | c = getc (gfc_src_file); |
| 2808 | |
| 2809 | if (c != '#') |
| 2810 | return NULL__null; |
| 2811 | |
| 2812 | len = 0; |
| 2813 | load_line (gfc_src_file, &gfc_src_preprocessor_lines[0], &len, &c); |
| 2814 | |
| 2815 | if (wide_strncmp (gfc_src_preprocessor_lines[0], "# 1 \"", 5) != 0) |
| 2816 | return NULL__null; |
| 2817 | |
| 2818 | tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[0][5], -1); |
| 2819 | filename = unescape_filename (tmp); |
| 2820 | free (tmp); |
| 2821 | if (filename == NULL__null) |
| 2822 | return NULL__null; |
| 2823 | |
| 2824 | c = getc (gfc_src_file); |
| 2825 | |
| 2826 | if (c != '#') |
| 2827 | return filename; |
| 2828 | |
| 2829 | len = 0; |
| 2830 | load_line (gfc_src_file, &gfc_src_preprocessor_lines[1], &len, &c); |
| 2831 | |
| 2832 | if (wide_strncmp (gfc_src_preprocessor_lines[1], "# 1 \"", 5) != 0) |
| 2833 | return filename; |
| 2834 | |
| 2835 | tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[1][5], -1); |
| 2836 | dirname = unescape_filename (tmp); |
| 2837 | free (tmp); |
| 2838 | if (dirname == NULL__null) |
| 2839 | return filename; |
| 2840 | |
| 2841 | len = strlen (dirname); |
| 2842 | if (len < 3 || dirname[len - 1] != '/' || dirname[len - 2] != '/') |
| 2843 | { |
| 2844 | free (dirname); |
| 2845 | return filename; |
| 2846 | } |
| 2847 | dirname[len - 2] = '\0'; |
| 2848 | set_src_pwd (dirname); |
| 2849 | |
| 2850 | if (! IS_ABSOLUTE_PATH (filename)(((((filename)[0]) == '/') || ((((filename)[0]) == '\\') && (0))) || ((filename)[0] && ((filename)[1] == ':') && (0)))) |
| 2851 | { |
| 2852 | char *p = XCNEWVEC (char, len + strlen (filename))((char *) xcalloc ((len + strlen (filename)), sizeof (char))); |
| 2853 | |
| 2854 | memcpy (p, dirname, len - 2); |
| 2855 | p[len - 2] = '/'; |
| 2856 | strcpy (p + len - 1, filename); |
| 2857 | *canon_source_file = p; |
| 2858 | } |
| 2859 | |
| 2860 | free (dirname); |
| 2861 | return filename; |
| 2862 | } |