| 1 | /*
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| 2 | * main.cc
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| 3 | *
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| 4 | * This file contains some generic functions. It is part of
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| 5 | * the assignment for the Compiler Construction course at the Leiden Institute
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| 6 | * of Advanced Computer Science (LIACS), Leiden University.
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| 7 | */
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| 8 |
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| 9 | #include "ICGenerator.h"
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| 10 | #include "SymbolTable.h"
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| 11 | #include "debug.h"
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| 12 |
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| 13 | /* Globals */
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| 14 | ICGenerator * icg;
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| 15 | IntermediateCode * icode;
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| 16 | bool bWarnings = true;
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| 17 | bool bOptimize1 = false;
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| 18 | bool extraDump = false;
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| 19 |
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| 20 |
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| 21 | /* Extern functions */
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| 22 | int yyparse();
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| 23 |
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| 24 |
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| 25 | /* Extern variables */
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| 26 | extern int lineno;
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| 27 | extern SyntaxTree * tree;
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| 28 | extern SymbolTable * symtab;
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| 29 | extern int gErrorCount;
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| 30 | extern int gWarningCount;
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| 31 | extern int msglevel;
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| 32 |
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| 33 |
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| 34 |
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| 35 |
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| 36 | void PrintError (char * msg) {
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| 37 | fprintf (stderr, "Error on line %d: %s\n", lineno, msg);
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| 38 | gErrorCount++;
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| 39 | }//PrintError
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| 40 |
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| 41 |
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| 42 | void PrintWarning (char * msg) {
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| 43 | if (bWarnings) {
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| 44 | fprintf (stderr, "Warning on line %d: %s\n", lineno, msg);
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| 45 | gWarningCount++;
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| 46 | }
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| 47 | }//PrintWarning
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| 48 |
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| 49 | void usage(char * argv0) {
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| 50 | fprintf (stderr, "Usage: %s [OPTION]\n", argv0);
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| 51 | fprintf (stderr, "Defaults: %s -w -O0\n", argv0);
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| 52 | fprintf (stderr, "-h = Reading right now ;-)\n");
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| 53 | fprintf (stderr, "-w = Enable warnings\n");
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| 54 | fprintf (stderr, "-O0 = No optimalisation\n");
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| 55 | fprintf (stderr, "-O1 = Use otimalisation\n");
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| 56 | fprintf (stderr, "-g = Debug, more flags higher level\n");
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| 57 | fprintf (stderr, "-s = Dump symbolTable after ICG\n");
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| 58 | }
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| 59 |
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| 60 | /* Parse the command line */
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| 61 | int ParseCommandline(int argc, char ** argv)
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| 62 | {
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| 63 | for (int i = 1; i < argc; i++) {
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| 64 | if (strcmp(argv[i], "-w") == 0) {
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| 65 | bWarnings = false;
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| 66 | }
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| 67 | else if (strcmp(argv[i], "-O0") == 0) {
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| 68 | bOptimize1 = false;
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| 69 | }
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| 70 | else if (strcmp(argv[i], "-O1") == 0) {
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| 71 | bOptimize1 = true;
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| 72 | }
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| 73 | else if (strcmp(argv[i], "-h") == 0) {
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| 74 | usage(argv[0]);
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| 75 | return 1;
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| 76 | }
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| 77 | else if (strcmp(argv[i], "-g") == 0) {
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| 78 | msglevel += 30;
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| 79 | }
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| 80 | else if (strcmp(argv[i], "-s") == 0) {
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| 81 | extraDump = true;
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| 82 | }
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| 83 | else {
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| 84 | fprintf(stderr, "Error: unrecognized command line option '%s'\n", argv[i]);
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| 85 | usage(argv[0]);
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| 86 | return 1;
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| 87 | }
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| 88 | }
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| 89 |
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| 90 | return 0;
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| 91 | }
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| 92 |
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| 93 |
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| 94 | void initialize()
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| 95 | {
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| 96 | /* Create & initialize the abstract data structures */
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| 97 | tree = new SyntaxTree;
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| 98 | symtab = new SymbolTable;
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| 99 | icg = new ICGenerator;
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| 100 | icode = NULL;
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| 101 |
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| 102 | gErrorCount = 0;
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| 103 | gWarningCount = 0;
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| 104 | }
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| 105 |
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| 106 |
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| 107 | void cleanup()
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| 108 | {
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| 109 | /* Free objects */
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| 110 | delete icg;
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| 111 | delete tree;
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| 112 | delete symtab;
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| 113 | if (icode) delete icode;
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| 114 | }
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| 115 |
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| 116 |
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| 117 | int main(int argc, char ** argv)
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| 118 | {
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| 119 | int parseResult;
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| 120 |
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| 121 | if (ParseCommandline(argc, argv) == 1) {
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| 122 | return 1;
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| 123 | }
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| 124 |
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| 125 | initialize();
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| 126 |
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| 127 | /* Start the parsing procedure */
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| 128 | parseResult = yyparse();
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| 129 |
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| 130 | /* Dump the syntax tree & symbol table */
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| 131 | tree->Dump (stdout);
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| 132 | printf("\n");
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| 133 | symtab->Dump (stdout);
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| 134 |
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| 135 | /* Generate intermediate code, if everything is still ok */
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| 136 | if (!(parseResult || gErrorCount)) {
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| 137 | if (bOptimize1) {
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| 138 | icg->Preprocess(tree, symtab);
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| 139 | tree->Dump (stdout);
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| 140 | }
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| 141 | icode = icg->GenerateIntermediateCode(tree, symtab);
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| 142 | if (bOptimize1) {
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| 143 | icg->Postprocess(icode, symtab);
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| 144 | }
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| 145 | icode->Dump (stdout);
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| 146 |
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| 147 | /* Dump Extra symbol table at the end, to view edited variables on the symbol table */
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| 148 | if (extraDump) {
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| 149 | printf("\n");
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| 150 | symtab->Dump (stdout);
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| 151 | }
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| 152 | }
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| 153 |
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| 154 | printf("%d error(s), %d warning(s)\n", gErrorCount + parseResult, gWarningCount);
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| 155 |
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| 156 | cleanup();
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| 157 |
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| 158 | return (parseResult || gErrorCount);
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| 159 |
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| 160 | }
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