driver.c

/*
Group No: 26
Authors:
    Nithin Benny Myppan - 2016A7PS0014P
    Adhitya Mamallan    - 2016A7PS0028P
    Swarup N            - 2016A7PS0080P
    Naveen Unnikrishnan - 2016A7PS0111P
*/
#include "lexer.h"
#include "parser.h"
#include "ast.h"
#include "symbolTable.h"
#include "semanticAnalyzer.h"
#include <time.h>

int main(int argc, char* argv[]){
    printf("Level 2: Symbol Table, AST, Semantic Rules and Type Checking work\n\n");
    if(argc!=3){
        printf("Please re-enter command as ./compiler testcase.txt\n");
        return 0;
    }

    Grammar *g = loadGrammar("grammar.txt");
    printf("> Grammar loaded.\n");
    FirstAndFollow* ff = getFirstAndFollowSets(g);
    printf("> First and follow sets computed.\n");
    ParsingTable pt = makeNewParseTable();
    createParseTable(g, ff, pt);
    printf("> Parse table created.\n\n");
    int loop = 1, errors;
    ParseTree tree = NULL;
    AST ast = NULL;
    STTree st = NULL;
    while(loop){
        printf("Enter the task to perform.\n\n");
        printf("0 - Quit\n");
        printf("1 - Print the token list generated by the lexer\n"); 
        printf("2 - Parse to verify the syntactic correctness of the input code and print the parse tree appropriately\n"); 
        printf("3 - Print the Abstract Syntax Tree in appropriate format\n");
        printf("4 - Display the amount of allocated memory and number of nodes in the parse tree and the abstract syntax tree\n");
        printf("5 - Print the Symbol Table\n");
        printf("6 - Print the list of global variables, with size and offset\n");
        printf("7 - Print the total memory requirement of each function\n");
        printf("8 - Print the type expressions and width of global records\n");
        
        int op;
        scanf("%d", &op);

        switch(op){
            case 0:
                loop = 0;
                break;
            case 1:
                printf("\n>> Printing token list.\n********************************\n\n");
                printTokenList(argv[1]);
                break;
            case 2:
                tree = parseInputSourceCode(argv[1],pt,ff,&errors);
                printParseTree(tree);
                break;
            case 3:
                if(tree==NULL){
                    printf("\nParse tree hasn't been made yet, please run 2 first.\n\n");
                    break;
                }
                if(errors>0){
                    printf("\nSource code is syntactically wrong, can't make AST.\n\n");
                }
                if(ast==NULL) ast = makeAST(tree);
                displayAST(ast);
                break;
            case 4:
                if(tree==NULL || ast==NULL){
                    printf("\nAST hasn't been made yet, please run 3 first.\n\n");
                    break;
                }
                compressionRatio(tree, ast);
                printf("\n");
                break;
            case 5:
                if(ast==NULL){
                    printf("\nAST hasn't been made yet, please run 3 first.\n\n");
                    break;
                }
                if(st==NULL){
                    printf("\n");
                    st = makeSymbolTables(ast);
                }
                displaySTTree(st);
                break;
            case 6:
                if(st==NULL){
                    printf("\nSymbol Table hasn't been made yet, please run 5 first.\n\n");
                    break;
                }
                printGlobalVars(st);
                break;
            case 7:
                if(st==NULL){
                    printf("\nSymbol Table hasn't been made yet, please run 5 first.\n\n");
                    break;
                }
                printFnMemories(st);
                break;
            case 8:
                if(st==NULL){
                    printf("\nSymbol Table hasn't been made yet, please run 5 first.\n\n");
                    break;
                }
                printTypeExpressionGlobalRecord(st);
                break;
            default:
                printf("Invalid argument, please try again.\n\n");
        }
    }
    return 0;
}