main.cc
author Mario de Sousa <msousa@fe.up.pt>
Wed, 26 Dec 2018 11:12:27 +0000
changeset 1078 81e2a100db14
parent 1014 a61f8f58f612
permissions -rw-r--r--
Test for overflow when translating task periods/intervals to integer variable.
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/*
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 *  matiec - a compiler for the programming languages defined in IEC 61131-3
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 *  Copyright (C) 2003-2011  Mario de Sousa (msousa@fe.up.pt)
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 *  Copyright (C) 2007-2011  Laurent Bessard and Edouard Tisserant
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 *
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 *  This program is free software: you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation, either version 3 of the License, or
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 *  (at your option) any later version.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 *
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 *
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 * This code is made available on the understanding that it will not be
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 * used in safety-critical situations without a full and competent review.
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 */
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/*
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 * An IEC 61131-3 compiler.
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 *
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 * Based on the
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 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
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 *
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 */
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/*
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 ****************************************************************
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 ****************************************************************
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 ****************************************************************
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 *********                                              *********
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 *********                                              *********
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 *********   O V E R A L L    A R C H I T E C T U R E   *********
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 *********                                              *********
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 *********                                              *********
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 ****************************************************************
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 ****************************************************************
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 ****************************************************************
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 The compiler works in 4(+1) stages:
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 Stage 1   - Lexical analyser      - implemented with flex (iec.flex)
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 Stage 2   - Syntax parser         - implemented with bison (iec.y)
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 Stage 3   - Semantics analyser    - not yet implemented
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 Stage 4   - Code generator        - implemented in C++
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 Stage 4+1 - Binary code generator - gcc, javac, etc...
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 Data structures passed between stages, in global variables:
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 1->2   : tokens (int), and token values (char *)
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 2->1   : symbol tables (defined in symtable.hh)
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 2->3   : abstract syntax tree (tree of C++ classes, in absyntax.hh file)
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 3->4   : Same as 2->3
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 4->4+1 : file with program in c, java, etc...
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 The compiler works in several passes:
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 Pass 1: executes stages 1 and 2 simultaneously
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 Pass 2: executes stage 3
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 Pass 3: executes stage 4
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 Pass 4: executes stage 4+1
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*/
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#include <stdio.h>
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#include <getopt.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <iostream>
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#include "config/config.h"
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#include "absyntax/absyntax.hh"
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#include "absyntax_utils/absyntax_utils.hh"
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#include "stage1_2/stage1_2.hh"
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#include "stage3/stage3.hh"
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#include "stage4/stage4.hh"
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#include "main.hh"
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#ifndef HGVERSION
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   #define HGVERSION ""
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#endif
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void error_exit(const char *file_name, int line_no, const char *errmsg, ...) {
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  va_list argptr;
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  va_start(argptr, errmsg); /* second argument is last fixed pamater of error_exit() */
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  fprintf(stderr, "\nInternal compiler error in file %s at line %d", file_name, line_no);
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  if (errmsg != NULL) {
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    fprintf(stderr, ": ");
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    vfprintf(stderr, errmsg, argptr);
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  } else {
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    fprintf(stderr, ".");
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  }
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  fprintf(stderr, "\n");
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  va_end(argptr);
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  exit(EXIT_FAILURE);
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}
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static void printusage(const char *cmd) {
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  printf("\nsyntax: %s [<options>] [-O <output_options>] [-I <include_directory>] [-T <target_directory>] <input_file>\n", cmd);
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  printf(" -h : show this help message\n");
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  printf(" -v : print version number\n");  
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  printf(" -f : display full token location on error messages\n");
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  printf(" -p : allow use of forward references                (a non-standard extension?)\n");  
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  printf(" -l : use a relaxed datatype equivalence model       (a non-standard extension?)\n");  
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  printf(" -s : allow use of safe datatypes (SAFEBOOL, etc.)   (defined in PLCOpen Safety)\n"); // PLCopen TC5 "Safety Software Technical Specification - Part 1" v1.0
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  printf(" -n : allow use of nested comments                   (an IEC 61131-3 v3 feature)\n");
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  printf(" -r : allow use of references (REF_TO, REF, ^, NULL) (an IEC 61131-3 v3 feature)\n");
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  printf(" -R : allow use of REF_TO ANY datatypes              (a non-standard extension!)\n");
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  printf("        as well as REF_TO in ARRAYs and STRUCTs      (a non-standard extension!)\n");
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  printf(" -a : allow use of non-literals in array size limits (a non-standard extension!)\n");
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  printf(" -i : allow POUs with no in out and inout parameters (a non-standard extension!)\n");
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  printf(" -b : allow functions returning VOID                 (a non-standard extension!)\n");
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  printf(" -e : disable generation of implicit EN and ENO parameters.\n");
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  printf(" -c : create conversion functions for enumerated data types\n");
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  printf(" -O : options for output (code generation) stage. Available options for %s are...\n", cmd);
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  runtime_options.allow_missing_var_in    = false; /* disable: allow definition and invocation of POUs with no input, output and in_out parameters! */
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  stage4_print_options();
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  printf("\n");
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  printf("%s - Copyright (C) 2003-2014 \n"
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         "This program comes with ABSOLUTELY NO WARRANTY!\n"
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         "This is free software licensed under GPL v3, and you are welcome to redistribute it under the conditions specified by this license.\n", PACKAGE_NAME);
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}
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/* declare the global options variable */
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runtime_options_t runtime_options;
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int main(int argc, char **argv) {
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  symbol_c *tree_root, *ordered_tree_root;
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  char * builddir = NULL;
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  int optres, errflg = 0;
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  int path_len;
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   147
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  /* Default values for the command line options... */
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  runtime_options.allow_void_datatype     = false; /* disable: allow declaration of functions returning VOID  */
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  runtime_options.allow_missing_var_in    = false; /* disable: allow definition and invocation of POUs with no input, output and in_out parameters! */
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  runtime_options.disable_implicit_en_eno = false; /* disable: do not generate EN and ENO parameters */
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  runtime_options.pre_parsing             = false; /* disable: allow use of forward references (run pre-parsing phase before the definitive parsing phase that builds the AST) */
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  runtime_options.safe_extensions         = false; /* disable: allow use of SAFExxx datatypes */
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  runtime_options.full_token_loc          = false; /* disable: error messages specify full token location */
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  runtime_options.conversion_functions    = false; /* disable: create a conversion function for derived datatype */
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  runtime_options.nested_comments         = false; /* disable: Allow the use of nested comments. */
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  runtime_options.ref_standard_extensions = false; /* disable: Allow the use of REFerences (keywords REF_TO, REF, DREF, ^, NULL). */
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  runtime_options.ref_nonstand_extensions = false; /* disable: Allow the use of non-standard extensions to REF_TO datatypes: REF_TO ANY, and REF_TO in struct elements! */
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   159
  runtime_options.nonliteral_in_array_size= false; /* disable: Allow the use of constant non-literals when specifying size of arrays (ARRAY [1..max] OF INT) */
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  runtime_options.includedir              = NULL;  /* Include directory, where included files will be searched for... */
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   161
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  /* Default values for the command line options... */
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  runtime_options.relaxed_datatype_model    = false; /* by default use the strict datatype equivalence model */
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  /******************************************/
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  /*   Parse command line options...        */
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  /******************************************/
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  while ((optres = getopt(argc, argv, ":nehvfplsrRabicI:T:O:")) != -1) {
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    switch(optres) {
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    case 'h':
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      printusage(argv[0]);
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      return 0;
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    case 'v':
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      fprintf(stdout, "%s version %s\n" "changeset id: %s\n", PACKAGE_NAME, PACKAGE_VERSION, HGVERSION);      
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      return 0;
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    case 'l': runtime_options.relaxed_datatype_model   = true;  break;
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    case 'p': runtime_options.pre_parsing              = true;  break;
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    case 'f': runtime_options.full_token_loc           = true;  break;
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    case 's': runtime_options.safe_extensions          = true;  break;
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    case 'R': runtime_options.ref_standard_extensions  = true; /* use of REF_TO ANY implies activating support for REF extensions! */
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              runtime_options.ref_nonstand_extensions  = true;  break;
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    case 'r': runtime_options.ref_standard_extensions  = true;  break;
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    case 'a': runtime_options.nonliteral_in_array_size = true;  break;
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   184
    case 'b': runtime_options.allow_void_datatype      = true;  break;
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   185
    case 'i': runtime_options.allow_missing_var_in     = true;  break;
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   186
    case 'c': runtime_options.conversion_functions     = true;  break;
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   187
    case 'n': runtime_options.nested_comments          = true;  break;
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   188
    case 'e': runtime_options.disable_implicit_en_eno  = true;  break;
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   189
    case 'I':
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      /* NOTE: To improve the usability under windows:
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   191
       *       We delete last char's path if it ends with "\".
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   192
       *       In this way compiler front-end accepts paths with or without
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   193
       *       slash terminator.
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   194
       */
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   195
      path_len = strlen(optarg) - 1;
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   196
      if (optarg[path_len] == '\\') optarg[path_len]= '\0';
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   197
      runtime_options.includedir = optarg;
177
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   198
      break;
179
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   199
    case 'T':
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   200
      /* NOTE: see note above */
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   201
      path_len = strlen(optarg) - 1;
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   202
      if (optarg[path_len] == '\\') optarg[path_len]= '\0';
179
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   203
      builddir = optarg;
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   204
      break;
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   205
    case 'O':
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   206
      if (stage4_parse_options(optarg) < 0) errflg++;
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   207
      break;
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   208
    case ':':       /* -I, -T, or -O without operand */
177
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diff changeset
   209
      fprintf(stderr, "Option -%c requires an operand\n", optopt);
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   210
      errflg++;
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diff changeset
   211
      break;
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diff changeset
   212
    case '?':
181
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diff changeset
   213
      fprintf(stderr, "Unrecognized option: -%c\n", optopt);
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diff changeset
   214
      errflg++;
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diff changeset
   215
      break;
177
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diff changeset
   216
    default:
181
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diff changeset
   217
      fprintf(stderr, "Unknown error while parsing command line options.");
177
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diff changeset
   218
      errflg++;
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diff changeset
   219
      break;
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diff changeset
   220
    }
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   221
  }
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   222
177
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   223
  if (optind == argc) {
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diff changeset
   224
    fprintf(stderr, "Missing input file\n");
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   225
    errflg++;
136
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diff changeset
   226
  }
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diff changeset
   227
177
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diff changeset
   228
  if (optind > argc) {
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diff changeset
   229
    fprintf(stderr, "Too many input files\n");
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diff changeset
   230
    errflg++;
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diff changeset
   231
  }
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   232
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   233
  if (errflg) {
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   234
    printusage(argv[0]);
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   235
    return EXIT_FAILURE;
136
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diff changeset
   236
  }
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   237
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   238
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   239
  /***************************/
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   240
  /*   Run the compiler...   */
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   241
  /***************************/
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   242
  /* 1st Pass */
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   243
  if (stage1_2(argv[optind], &tree_root) < 0)
0
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   244
    return EXIT_FAILURE;
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   245
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   246
  /* 2nd Pass */
315
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parents: 279
diff changeset
   247
    /* basically loads some symbol tables to speed up look ups later on */
c62a4078f269 Allow use of ENO keyword in structured variable field selector.
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parents: 279
diff changeset
   248
  absyntax_utils_init(tree_root);  
c62a4078f269 Allow use of ENO keyword in structured variable field selector.
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parents: 279
diff changeset
   249
    /* moved to bison, although it could perfectly well still be here instead of in bison code. */
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diff changeset
   250
  //add_en_eno_param_decl_c::add_to(tree_root);
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parents: 279
diff changeset
   251
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   252
  /* Do semantic verification of code */
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diff changeset
   253
  if (stage3(tree_root, &ordered_tree_root) < 0)
0
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   254
    return EXIT_FAILURE;
202
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Catarina Boucinha <ccb@fe.up.pt>
parents: 186
diff changeset
   255
  
0
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diff changeset
   256
  /* 3rd Pass */
959
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diff changeset
   257
  if (stage4(ordered_tree_root, builddir) < 0)
0
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diff changeset
   258
    return EXIT_FAILURE;
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  /* 4th Pass */
315
c62a4078f269 Allow use of ENO keyword in structured variable field selector.
Mario de Sousa <msousa@fe.up.pt>
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  /* Call gcc, g++, or whatever... */
0
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  /* Currently implemented in the Makefile! */
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  return 0;
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}
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