nsz Git - cparser/blob - main.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #define _GNU_SOURCE
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <stdbool.h>
  27 #include <errno.h>
  28 #include <string.h>
  29 #include <assert.h>
  30
  31 #ifdef _WIN32
  32
  33 #include <fcntl.h>
  34 #include <io.h>
  35
  36 /* no eXecute on Win32 */
  37 #define X_OK 0
  38 #define W_OK 2
  39 #define R_OK 4
  40
  41 #define O_RDWR          _O_RDWR
  42 #define O_CREAT         _O_CREAT
  43 #define O_EXCL          _O_EXCL
  44 #define O_BINARY        _O_BINARY
  45
  46 /* remap some names, we are not in the POSIX world */
  47 #define access(fname, mode)      _access(fname, mode)
  48 #define mktemp(tmpl)             _mktemp(tmpl)
  49 #define open(fname, oflag, mode) _open(fname, oflag, mode)
  50 #define fdopen(fd, mode)         _fdopen(fd, mode)
  51 #define popen(cmd, mode)         _popen(cmd, mode)
  52 #define pclose(file)             _pclose(file)
  53
  54 #else
  55 #include <unistd.h>
  56 #define HAVE_MKSTEMP
  57 #endif
  58
  59 #ifndef WITH_LIBCORE
  60 #define WITH_LIBCORE
  61 #endif
  62
  63 #include <libfirm/firm.h>
  64 #include <libfirm/be.h>
  65
  66 #include "lexer.h"
  67 #include "token_t.h"
  68 #include "types.h"
  69 #include "type_hash.h"
  70 #include "parser.h"
  71 #include "ast2firm.h"
  72 #include "diagnostic.h"
  73 #include "lang_features.h"
  74 #include "driver/firm_opt.h"
  75 #include "driver/firm_cmdline.h"
  76 #include "adt/error.h"
  77 #include "write_fluffy.h"
  78 #include "revision.h"
  79 #include "warning.h"
  80
  81 #ifndef PREPROCESSOR
  82 #define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int"
  83 #endif
  84
  85 #ifndef LINKER
  86 #define LINKER    "gcc -m32"
  87 #endif
  88
  89 #ifndef ASSEMBLER
  90 #define ASSEMBLER "as --32"
  91 #endif
  92
  93 /** The current c mode/dialect. */
  94 unsigned int c_mode = _C89|_C99|_GNUC;
  95
  96 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
  97 unsigned int machine_size = 32;
  98
  99 /** true if the char type is signed. */
 100 bool char_is_signed = true;
 101
 102 /** true for strict language checking. */
 103 bool strict_mode = false;
 104
 105 /* to switch on printing of implicit casts */
 106 extern bool print_implicit_casts;
 107
 108 /* to switch on printing of parenthesis to indicate operator precedence */
 109 extern bool print_parenthesis;
 110
 111 static int            verbose;
 112 static struct obstack cppflags_obst, ldflags_obst;
 113
 114 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 115 /**
 116  * Debug printf implementation.
 117  *
 118  * @param fmt  printf style format parameter
 119  */
 120 void dbg_printf(const char *fmt, ...)
 121 {
 122         va_list list;
 123
 124         if (firm_dump.debug_print) {
 125                 va_start(list, fmt);
 126                 vprintf(fmt, list);
 127                 va_end(list);
 128         }  /* if */
 129 }
 130 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 131
 132 static void initialize_firm(void)
 133 {
 134         firm_early_init();
 135
 136         dump_consts_local(1);
 137         dump_keepalive_edges(1);
 138 }
 139
 140 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 141                             const char *newext)
 142 {
 143         size_t last_dot = 0xffffffff;
 144         size_t i = 0;
 145
 146         if(inputname == NULL) {
 147                 snprintf(buf, buflen, "a%s", newext);
 148                 return;
 149         }
 150
 151         for(const char *c = inputname; *c != 0; ++c) {
 152                 if(*c == '.')
 153                         last_dot = i;
 154                 ++i;
 155         }
 156         if(last_dot == 0xffffffff)
 157                 last_dot = i;
 158
 159         if(last_dot >= buflen)
 160                 panic("filename too long");
 161         memcpy(buf, inputname, last_dot);
 162
 163         size_t extlen = strlen(newext) + 1;
 164         if(extlen + last_dot >= buflen)
 165                 panic("filename too long");
 166         memcpy(buf+last_dot, newext, extlen);
 167 }
 168
 169 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 170 {
 171         lexer_open_stream(in, input_name);
 172         translation_unit_t *unit = parse();
 173         return unit;
 174 }
 175
 176 static void lextest(FILE *in, const char *fname)
 177 {
 178         lexer_open_stream(in, fname);
 179
 180         do {
 181                 lexer_next_preprocessing_token();
 182                 print_token(stdout, &lexer_token);
 183                 puts("");
 184         } while(lexer_token.type != T_EOF);
 185 }
 186
 187 static FILE *preprocess(FILE *in, const char *fname)
 188 {
 189         char buf[4096];
 190         obstack_1grow(&cppflags_obst, '\0');
 191         const char *flags = obstack_finish(&cppflags_obst);
 192
 193         if(in != stdin) {
 194                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s %s", flags, fname);
 195         } else {
 196                 /* read from stdin */
 197                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s -", flags);
 198         }
 199
 200         if(verbose) {
 201                 puts(buf);
 202         }
 203         FILE *f = popen(buf, "r");
 204         if(f == NULL) {
 205                 fprintf(stderr, "invoking preprocessor failed\n");
 206                 exit(1);
 207         }
 208         return f;
 209 }
 210
 211 static void do_link(const char *out, const char *in)
 212 {
 213         char buf[4096];
 214         obstack_1grow(&ldflags_obst, '\0');
 215         const char *flags = obstack_finish(&ldflags_obst);
 216
 217         snprintf(buf, sizeof(buf), LINKER " %s -o %s %s", flags, out, in);
 218         if(verbose) {
 219                 puts(buf);
 220         }
 221         int err = system(buf);
 222         if(err != 0) {
 223                 fprintf(stderr, "linker reported an error\n");
 224                 exit(1);
 225         }
 226 }
 227
 228 static void assemble(const char *out, const char *in)
 229 {
 230         char buf[4096];
 231
 232         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 233         if(verbose) {
 234                 puts(buf);
 235         }
 236
 237         int err = system(buf);
 238         if(err != 0) {
 239                 fprintf(stderr, "assembler reported an error\n");
 240                 exit(1);
 241         }
 242 }
 243
 244 static const char *try_dir(const char *dir)
 245 {
 246         if(dir == NULL)
 247                 return dir;
 248         if(access(dir, R_OK | W_OK | X_OK) == 0)
 249                 return dir;
 250         return NULL;
 251 }
 252
 253 static const char *get_tempdir(void)
 254 {
 255         static const char *tmpdir = NULL;
 256
 257         if(tmpdir != NULL)
 258                 return tmpdir;
 259
 260         if(tmpdir == NULL)
 261                 tmpdir = try_dir(getenv("TMPDIR"));
 262         if(tmpdir == NULL)
 263                 tmpdir = try_dir(getenv("TMP"));
 264         if(tmpdir == NULL)
 265                 tmpdir = try_dir(getenv("TEMP"));
 266
 267 #ifdef P_tmpdir
 268         if(tmpdir == NULL)
 269                 tmpdir = try_dir(P_tmpdir);
 270 #endif
 271
 272         if(tmpdir == NULL)
 273                 tmpdir = try_dir("/var/tmp");
 274         if(tmpdir == NULL)
 275                 tmpdir = try_dir("/usr/tmp");
 276         if(tmpdir == NULL)
 277                 tmpdir = try_dir("/tmp");
 278
 279         if(tmpdir == NULL)
 280                 tmpdir = ".";
 281
 282         return tmpdir;
 283 }
 284
 285 #ifndef HAVE_MKSTEMP
 286 /* cheap and nasty mkstemp replacement */
 287 static int mkstemp(char *templ)
 288 {
 289         mktemp(templ);
 290         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 291 }
 292 #endif
 293
 294 /**
 295  * an own version of tmpnam, which: writes in a buffer, appends a user specified
 296  * suffix, emits no warnings during linking (like glibc/gnu ld do for tmpnam)...
 297  */
 298 static FILE *make_temp_file(char *buffer, size_t buflen,
 299                             const char *prefix, const char *suffix)
 300 {
 301         const char *tempdir = get_tempdir();
 302
 303         /* oh well... mkstemp doesn't accept a suffix after XXXXXX... */
 304         (void) suffix;
 305         suffix = "";
 306
 307         snprintf(buffer, buflen, "%s/%sXXXXXX%s", tempdir, prefix, suffix);
 308
 309         int fd = mkstemp(buffer);
 310         if(fd == -1) {
 311                 fprintf(stderr, "couldn't create temporary file: %s\n",
 312                         strerror(errno));
 313                 exit(1);
 314         }
 315         FILE *out = fdopen(fd, "w");
 316         if(out == NULL) {
 317                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 318                 exit(1);
 319         }
 320
 321         return out;
 322 }
 323
 324 /**
 325  * Do the necessary lowering for compound parameters.
 326  */
 327 void lower_compound_params(void)
 328 {
 329         lower_params_t params;
 330
 331         params.def_ptr_alignment    = 4;
 332         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 333         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 334         params.find_pointer_type    = NULL;
 335         params.ret_compound_in_regs = NULL;
 336         lower_calls_with_compounds(&params);
 337 }
 338
 339 typedef enum compile_mode_t {
 340         BenchmarkParser,
 341         ParseOnly,
 342         Compile,
 343         CompileDump,
 344         CompileAssemble,
 345         CompileAssembleLink,
 346         LexTest,
 347         PrintAst,
 348         PrintFluffy
 349 } compile_mode_t;
 350
 351 static void usage(const char *argv0)
 352 {
 353         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 354 }
 355
 356 int main(int argc, char **argv)
 357 {
 358         initialize_firm();
 359
 360         const char     *input        = NULL;
 361         const char     *outname      = NULL;
 362         const char     *dumpfunction = NULL;
 363         compile_mode_t  mode         = CompileAssembleLink;
 364         int             opt_level    = 1;
 365         int             result       = EXIT_SUCCESS;
 366
 367         obstack_init(&cppflags_obst);
 368         obstack_init(&ldflags_obst);
 369
 370 #define GET_ARG_AFTER(def, args)                                             \
 371         def = &arg[sizeof(args)-1];                                              \
 372         if(def[0] == '\0') {                                                     \
 373                 ++i;                                                                 \
 374                 if(i >= argc) {                                                      \
 375                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 376                         argument_errors = true;                                          \
 377                         break;                                                           \
 378                 }                                                                    \
 379                 def = argv[i];                                                       \
 380                 if(def[0] == '-' && def[1] != '\0') {                                \
 381                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 382                         argument_errors = true;                                          \
 383                         continue;                                                        \
 384                 }                                                                    \
 385         }
 386
 387 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 388
 389         /* early options parsing (find out optimisation level) */
 390         for(int i = 1; i < argc; ++i) {
 391                 const char *arg = argv[i];
 392                 if(arg[0] != '-')
 393                         continue;
 394
 395                 const char *option = &arg[1];
 396                 if(option[0] == 'O') {
 397                         sscanf(&option[1], "%d", &opt_level);
 398                 }
 399         }
 400
 401         /* apply optimisation level */
 402         switch(opt_level) {
 403         case 0:
 404                 firm_option("no-opt");
 405                 break;
 406         case 1:
 407                 firm_option("no-inline");
 408                 break;
 409         default:
 410         case 4:
 411                 firm_option("strict-aliasing");
 412                 /* fallthrough */
 413         case 3:
 414                 firm_option("cond-eval");
 415                 firm_option("if-conv");
 416                 /* fallthrough */
 417         case 2:
 418                 firm_option("inline");
 419                 firm_option("deconv");
 420                 firm_be_option("omitfp");
 421                 break;
 422         }
 423
 424         /* parse rest of options */
 425         bool help_displayed  = false;
 426         bool argument_errors = false;
 427         for(int i = 1; i < argc; ++i) {
 428                 const char *arg = argv[i];
 429                 if(arg[0] == '-') {
 430                         /* an option */
 431                         const char *option = &arg[1];
 432                         if(option[0] == 'o') {
 433                                 GET_ARG_AFTER(outname, "-o");
 434                         } else if(option[0] == 'g') {
 435                                 firm_be_option("stabs=yes");
 436                                 firm_be_option("omitfp=no");
 437                                 firm_be_option("ia32-nooptcc=yes");
 438                         } else if(SINGLE_OPTION('c')) {
 439                                 mode = CompileAssemble;
 440                         } else if(SINGLE_OPTION('S')) {
 441                                 mode = Compile;
 442                         } else if(option[0] == 'O') {
 443                                 continue;
 444                         } else if(option[0] == 'I') {
 445                                 const char *opt;
 446                                 GET_ARG_AFTER(opt, "-I");
 447                                 obstack_printf(&cppflags_obst, " -I%s", opt);
 448                         } else if(option[0] == 'D') {
 449                                 const char *opt;
 450                                 GET_ARG_AFTER(opt, "-D");
 451                                 obstack_printf(&cppflags_obst, " -D%s", opt);
 452                         } else if(option[0] == 'U') {
 453                                 const char *opt;
 454                                 GET_ARG_AFTER(opt, "-U");
 455                                 obstack_printf(&cppflags_obst, " -U%s", opt);
 456                         } else if(option[0] == 'l') {
 457                                 const char *opt;
 458                                 GET_ARG_AFTER(opt, "-l");
 459                                 obstack_printf(&ldflags_obst, " -l%s", opt);
 460                         } else if(option[0] == 'L') {
 461                                 const char *opt;
 462                                 GET_ARG_AFTER(opt, "-L");
 463                                 obstack_printf(&ldflags_obst, " -L%s", opt);
 464                         } else if(SINGLE_OPTION('v')) {
 465                                 verbose = 1;
 466                         } else if(SINGLE_OPTION('w')) {
 467                                 inhibit_all_warnings = true;
 468                         } else if(option[0] == 'f') {
 469                                 const char *opt;
 470                                 GET_ARG_AFTER(opt, "-f");
 471
 472                                 if(strcmp(opt, "syntax-only") == 0) {
 473                                         mode = ParseOnly;
 474                                 } else if(strcmp(opt, "omit-frame-pointer") == 0) {
 475                                         firm_be_option("omitfp");
 476                                 } else if(strcmp(opt, "no-omit-frame-pointer") == 0) {
 477                                         firm_be_option("omitfp=no");
 478                                 } else {
 479                                         int res = firm_option(opt);
 480                                         if (res == 0) {
 481                                                 fprintf(stderr, "error: unknown Firm option '-f %s'\n",
 482                                                         opt);
 483                                                 argument_errors = true;
 484                                                 continue;
 485                                         } else if (res == -1) {
 486                                                 help_displayed = true;
 487                                         }
 488                                 }
 489                         } else if(option[0] == 'b') {
 490                                 const char *opt;
 491                                 GET_ARG_AFTER(opt, "-b");
 492                                 int res = firm_be_option(opt);
 493                                 if (res == 0) {
 494                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 495                                                 opt);
 496                                         argument_errors = true;
 497                                 } else if (res == -1) {
 498                                         help_displayed = true;
 499                                 }
 500                         } else if(option[0] == 'W') {
 501                                 set_warning_opt(&option[1]);
 502                         } else if(option[0] == 'm') {
 503                                 const char *opt;
 504                                 GET_ARG_AFTER(opt, "-m");
 505                                 char *endptr;
 506                                 long int value = strtol(opt, &endptr, 10);
 507                                 if (*endptr != '\0') {
 508                                         fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 509                                         argument_errors = true;
 510                                 }
 511                                 if (value != 16 && value != 32 && value != 64) {
 512                                         fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 513                                         argument_errors = true;
 514                                 } else {
 515                                         machine_size = (unsigned int)value;
 516                                 }
 517                         } else if (option[0] == '\0') {
 518                                 if(input != NULL) {
 519                                         fprintf(stderr, "error: multiple input files specified\n");
 520                                         argument_errors = true;
 521                                 } else {
 522                                         input = arg;
 523                                 }
 524                         } else if(strcmp(option, "pg") == 0) {
 525                                 firm_be_option("-b gprof");
 526                                 obstack_printf(&ldflags_obst, " -pg");
 527                         } else if(strcmp(option, "pedantic") == 0) {
 528                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 529                         } else if(strncmp(option, "std=", 4) == 0) {
 530                                 if(strcmp(&option[4], "c99") == 0) {
 531                                         c_mode = _C89|_C99;
 532                                 } else if(strcmp(&option[4], "c89") == 0) {
 533                                         c_mode = _C89;
 534                                 } else if(strcmp(&option[4], "gnu99") == 0) {
 535                                         c_mode = _C89|_C99|_GNUC;
 536                                 } else if(strcmp(&option[4], "microsoft") == 0) {
 537                                         c_mode = _C89|_C99|_MS;
 538                                 } else
 539                                         fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 540                         } else if (option[0] == '-') {
 541                                 /* double dash option */
 542                                 ++option;
 543                                 if(strcmp(option, "gcc") == 0) {
 544                                         c_mode |= _GNUC;
 545                                 } else if(strcmp(option, "no-gcc") == 0) {
 546                                         c_mode &= ~_GNUC;
 547                                 } else if(strcmp(option, "ms") == 0) {
 548                                         c_mode |= _MS;
 549                                 } else if(strcmp(option, "no-ms") == 0) {
 550                                         c_mode &= ~_MS;
 551                                 } else if(strcmp(option, "signed-chars") == 0) {
 552                                         char_is_signed = true;
 553                                 } else if(strcmp(option, "unsigned-chars") == 0) {
 554                                         char_is_signed = false;
 555                                 } else if(strcmp(option, "strict") == 0) {
 556                                         strict_mode = true;
 557                                 } else if(strcmp(option, "lextest") == 0) {
 558                                         mode = LexTest;
 559                                 } else if(strcmp(option, "benchmark") == 0) {
 560                                         mode = BenchmarkParser;
 561                                 } else if(strcmp(option, "print-ast") == 0) {
 562                                         mode = PrintAst;
 563                                 } else if(strcmp(option, "print-implicit-cast") == 0) {
 564                                         print_implicit_casts = true;
 565                                 } else if(strcmp(option, "print-parenthesis") == 0) {
 566                                         print_parenthesis = true;
 567                                 } else if(strcmp(option, "print-fluffy") == 0) {
 568                                         mode = PrintFluffy;
 569                                 } else if(strcmp(option, "version") == 0) {
 570                                         firm_version_t ver;
 571                                         firm_get_version(&ver);
 572                                         printf("cparser (%s) using libFirm (%u.%u",
 573                                                cparser_REVISION, ver.major, ver.minor);
 574                                         if(ver.revision[0] != 0) {
 575                                                 putchar(' ');
 576                                                 fputs(ver.revision, stdout);
 577                                         }
 578                                         if(ver.build[0] != 0) {
 579                                                 putchar(' ');
 580                                                 fputs(ver.build, stdout);
 581                                         }
 582                                         puts(")\n");
 583                                         exit(EXIT_SUCCESS);
 584                                 } else if(strcmp(option, "dump-function") == 0) {
 585                                         ++i;
 586                                         if(i >= argc) {
 587                                                 fprintf(stderr, "error: "
 588                                                         "expected argument after '--dump-function'\n");
 589                                                 argument_errors = true;
 590                                                 break;
 591                                         }
 592                                         dumpfunction = argv[i];
 593                                         mode         = CompileDump;
 594                                 } else {
 595                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
 596                                         argument_errors = true;
 597                                 }
 598                         } else {
 599                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 600                                 argument_errors = true;
 601                         }
 602                 } else {
 603                         if(input != NULL) {
 604                                 fprintf(stderr, "error: multiple input files specified\n");
 605                                 argument_errors = true;
 606                         } else {
 607                                 input = arg;
 608                         }
 609                 }
 610         }
 611
 612         /* we do the lowering in ast2firm */
 613         firm_opt.lower_bitfields = FALSE;
 614
 615         if(help_displayed) {
 616                 return !argument_errors;
 617         }
 618         if(argument_errors) {
 619                 usage(argv[0]);
 620                 return 1;
 621         }
 622
 623         gen_firm_init();
 624         init_symbol_table();
 625         init_tokens();
 626         init_types();
 627         init_typehash();
 628         init_basic_types();
 629         init_lexer();
 630         init_ast();
 631         init_parser();
 632         init_ast2firm();
 633
 634         FILE *out = NULL;
 635         char  outnamebuf[4096];
 636         if(outname == NULL) {
 637                 switch(mode) {
 638                 case BenchmarkParser:
 639                 case PrintAst:
 640                 case PrintFluffy:
 641                 case LexTest:
 642                         if(outname == NULL)
 643                                 outname = "-";
 644                         break;
 645                 case ParseOnly:
 646                         break;
 647                 case Compile:
 648                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".s");
 649                         outname = outnamebuf;
 650                         break;
 651                 case CompileAssemble:
 652                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".o");
 653                         outname = outnamebuf;
 654                         break;
 655                 case CompileDump:
 656                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 657                                         ".vcg");
 658                         outname = outnamebuf;
 659                         break;
 660                 case CompileAssembleLink:
 661 #ifdef _WIN32
 662                         /* Windows compiler typically derive the output name from
 663                            the first source file */
 664                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".exe");
 665                         outname = outnamebuf;
 666 #else
 667                         outname = "a.out";
 668 #endif
 669                         break;
 670                 }
 671         }
 672
 673         if(outname != NULL) {
 674                 if(strcmp(outname, "-") == 0) {
 675                         out = stdout;
 676                 } else {
 677                         out = fopen(outname, "w");
 678                         if(out == NULL) {
 679                                 fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 680                                         strerror(errno));
 681                                 return 1;
 682                         }
 683                 }
 684         }
 685
 686         FILE *in;
 687         if(input == NULL) {
 688                 fprintf(stderr, "%s: no input files\n", argv[0]);
 689                 return 1;
 690         } else if(strcmp(input, "-") == 0) {
 691                 in    = stdin;
 692                 input = "<stdin>";
 693         } else {
 694                 in = fopen(input, "r");
 695                 if(in == NULL) {
 696                         fprintf(stderr, "Couldn't open '%s': %s\n", input, strerror(errno));
 697                         return 1;
 698                 }
 699         }
 700
 701         if(mode == LexTest) {
 702                 lextest(in, input);
 703                 fclose(in);
 704                 return 0;
 705         }
 706
 707         FILE *preprocessed_in = preprocess(in, input);
 708         translation_unit_t *const unit = do_parsing(preprocessed_in, input);
 709         int res = pclose(preprocessed_in);
 710         if(res != 0) {
 711                 return res;
 712         }
 713
 714         if(error_count > 0) {
 715                 /* parsing failed because of errors */
 716                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count, warning_count);
 717                 result = EXIT_FAILURE;
 718         } else if(warning_count > 0) {
 719                 fprintf(stderr, "%u warning(s)\n", warning_count);
 720         }
 721
 722         if(mode == BenchmarkParser) {
 723                 return result;
 724         }
 725
 726         /* prints the AST even if errors occurred */
 727         if(mode == PrintAst) {
 728                 type_set_output(out);
 729                 ast_set_output(out);
 730                 print_ast(unit);
 731                 return result;
 732         }
 733
 734         /* cannot handle other modes with errors */
 735         if(result != EXIT_SUCCESS)
 736                 return result;
 737
 738         if(mode == PrintFluffy) {
 739                 type_set_output(out);
 740                 ast_set_output(out);
 741                 write_fluffy_decls(out, unit);
 742         }
 743
 744         translation_unit_to_firm(unit);
 745
 746         if(mode == ParseOnly) {
 747                 return 0;
 748         }
 749
 750         FILE *asm_out;
 751         char  asm_tempfile[1024];
 752         if(mode == CompileDump) {
 753                 asm_out = NULL;
 754                 firm_be_opt.selection = BE_NONE;
 755         } else if(mode == Compile) {
 756                 asm_out = out;
 757         } else {
 758                 asm_out
 759                         = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "cc", ".s");
 760         }
 761         gen_firm_finish(asm_out, input, /*c_mode=*/1, /*firm_const_exists=*/0);
 762
 763         if(mode == CompileDump) {
 764                 /* find irg */
 765                 ident    *id     = new_id_from_str(dumpfunction);
 766                 ir_graph *irg    = NULL;
 767                 int       n_irgs = get_irp_n_irgs();
 768                 for(int i = 0; i < n_irgs; ++i) {
 769                         ir_graph *tirg   = get_irp_irg(i);
 770                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
 771                         if(irg_id == id) {
 772                                 irg = tirg;
 773                                 break;
 774                         }
 775                 }
 776
 777                 if(irg == NULL) {
 778                         fprintf(stderr, "No graph for function '%s' found\n", dumpfunction);
 779                         return 1;
 780                 }
 781
 782                 dump_ir_block_graph_file(irg, out);
 783                 fclose(out);
 784                 return 0;
 785         }
 786
 787         fclose(asm_out);
 788
 789         /* assemble assembler and create object file */
 790         char obj_tfile[1024];
 791         if(mode == CompileAssemble || mode == CompileAssembleLink) {
 792                 const char *obj_outfile;
 793                 if(mode == CompileAssemble) {
 794                         fclose(out);
 795                         obj_outfile = outname;
 796                 } else {
 797                         FILE *tempf
 798                                 = make_temp_file(obj_tfile, sizeof(obj_tfile), "cc", ".o");
 799                         fclose(tempf);
 800                         obj_outfile = obj_tfile;
 801                 }
 802
 803                 assemble(obj_outfile, asm_tempfile);
 804         }
 805
 806         /* link object file */
 807         if(mode == CompileAssembleLink) {
 808                 do_link(outname, obj_tfile);
 809         }
 810
 811         obstack_free(&cppflags_obst, NULL);
 812         obstack_free(&ldflags_obst, NULL);
 813
 814         exit_ast2firm();
 815         exit_parser();
 816         exit_ast();
 817         exit_lexer();
 818         exit_typehash();
 819         exit_types();
 820         exit_tokens();
 821         exit_symbol_table();
 822         return 0;
 823 }