| 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 "SymbolTable.h"
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| 10 | #include "ICGenerator.h"
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| 11 | #include "CodeGenerator.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 | CodeGenerator * cg;
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| 17 | bool bWarnings = true;
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| 18 | bool bOptimize1 = 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(); // The parser
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| 23 | bool IsGlobal(Symbol * sym); // Is the specified symbol a global variable?
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| 24 |
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| 25 |
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| 26 | /* Extern variables */
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| 27 | extern int lineno;
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| 28 | extern SyntaxTree * tree;
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| 29 | extern SymbolTable * symtab;
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| 30 | extern int gErrorCount;
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| 31 | extern int gWarningCount;
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| 32 |
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| 33 |
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| 34 |
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| 35 | void PrintError (char * msg) {
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| 36 | fprintf (stderr, "Error on line %d: %s\n", lineno, msg);
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| 37 | gErrorCount++;
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| 38 | }//PrintError
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| 39 |
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| 40 |
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| 41 | void PrintWarning (char * msg) {
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| 42 | if (bWarnings) {
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| 43 | fprintf (stderr, "Warning on line %d: %s\n", lineno, msg);
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| 44 | gWarningCount++;
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| 45 | }
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| 46 | }//PrintWarning
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| 47 |
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| 48 |
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| 49 | /* Parse the command line */
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| 50 | int ParseCommandline(int argc, char ** argv)
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| 51 | {
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| 52 | for (int i = 1; i < argc; i++) {
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| 53 | if (strcmp(argv[i], "-w") == 0) {
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| 54 | bWarnings = false;
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| 55 | }
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| 56 | else if (strcmp(argv[i], "-O0") == 0) {
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| 57 | bOptimize1 = false;
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| 58 | }
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| 59 | else if (strcmp(argv[i], "-O1") == 0) {
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| 60 | bOptimize1 = true;
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| 61 | }
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| 62 | else {
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| 63 | fprintf(stderr, "Error: unrecognized command line option '%s'\n", argv[i]);
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| 64 | return 1;
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| 65 | }
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| 66 | }
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| 67 |
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| 68 | return 0;
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| 69 | }
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| 70 |
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| 71 |
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| 72 | void initialize()
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| 73 | {
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| 74 | /* Create & initialize the abstract data structures */
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| 75 | tree = new SyntaxTree;
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| 76 | symtab = new SymbolTable;
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| 77 | icg = new ICGenerator;
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| 78 | cg = new CodeGenerator;
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| 79 | icode = NULL;
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| 80 |
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| 81 | gErrorCount = 0;
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| 82 | gWarningCount = 0;
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| 83 | }
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| 84 |
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| 85 |
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| 86 | void cleanup()
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| 87 | {
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| 88 | /* Free objects */
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| 89 | delete cg;
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| 90 | delete icg;
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| 91 | delete tree;
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| 92 | delete symtab;
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| 93 | if (icode) delete icode;
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| 94 | }
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| 95 |
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| 96 |
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| 97 | int main(int argc, char ** argv)
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| 98 | {
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| 99 | FILE * outfile;
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| 100 | const char * outfilename = "out.s";
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| 101 | int parseResult;
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| 102 |
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| 103 | if (ParseCommandline(argc, argv) == 1) {
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| 104 | return 1;
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| 105 | }
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| 106 |
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| 107 | initialize();
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| 108 |
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| 109 | /* Start the parsing procedure */
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| 110 | parseResult = yyparse();
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| 111 |
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| 112 | /* Dump the syntax tree & symbol table */
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| 113 | tree->Dump (stdout);
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| 114 | printf("\n");
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| 115 | symtab->Dump (stdout);
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| 116 |
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| 117 | /* Generate intermediate code, if everything is still ok */
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| 118 | if (!(parseResult || gErrorCount)) {
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| 119 | if (bOptimize1) {
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| 120 | icg->Preprocess(tree, symtab);
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| 121 | }
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| 122 | icode = icg->GenerateIntermediateCode(tree, symtab);
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| 123 | icode->Dump(stdout);
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| 124 | if (bOptimize1) {
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| 125 | icg->Postprocess(icode, symtab);
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| 126 | }
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| 127 |
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| 128 | /* Now generate the final assembly */
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| 129 | outfile = fopen(outfilename, "w+");
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| 130 | cg->GenerateHeader(outfile);
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| 131 | cg->GenerateGlobalDecls(outfile, symtab);
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| 132 | cg->GenerateCode(outfile, symtab, icode);
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| 133 | cg->GenerateTrailer(outfile);
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| 134 | cg->Dump(outfile);
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| 135 | fclose(outfile);
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| 136 | printf("Output has been written to \"%s\".\n", outfilename);
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| 137 | }
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| 138 |
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| 139 | printf("%d error(s), %d warning(s)\n", gErrorCount + parseResult, gWarningCount);
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| 140 |
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| 141 | cleanup();
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| 142 |
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| 143 | return (parseResult || gErrorCount);
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| 144 |
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| 145 | }
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