driver.c

/*
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BATCH 26
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AAYUSH AHUJA 2010A7PS023P
MAYANK GUPTA 2010A7PS022P
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driver.c
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*/
#include<ctype.h>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<fcntl.h>
#include<malloc.h>
#include "lexerDef.h"
#include "lexer.h"
#include "parserDef.h"
#include "parser.h"
#include "symbolTable.h"
#include "codegen.h"

bool any_error =0;

int main(int argc, char *argv[])
{
    FILE *g=fopen("grammar.txt", "r");
    // FILE *p=fopen("parsetable.csv", "w");
    FILE *tree;
 //   FILE *ast=fopen("ast.txt", "w");
    if(g==NULL)
    {
        printf("Grammar file not found\n");
        return 0;
    }
    int opt,i,fp,Gno, totalAllocatedMemory=0;
    fp = open(argv[1],O_RDONLY);
    if(fp==-1)
    {
        printf("input file not found\n");
        return 0;
    }
    bool error = 0;
    Table T[60][60];
    grammar G[100];
    sets S[60];
    keyword kw[48];
    keyword kn[200];
    parseTree P,A;
    for(i=0; i<48; i++)
        kw[i].present=FALSE;
    keywordTable kt = kw;
    initkt(kt);
    for(i=0; i<200; i++)
        kn[i].present=FALSE;
    keywordTable nt = kn;
    initNt(nt);
    Gno=createGrammar(g,G,nt);
    initSets(S,G,Gno);
//    createSets(s,S,nt);
    initTable(T);
    createParseTable(G,T,S,Gno);
    // printTable(p, T);
    variable GT[100]; //max 100 globals possible 
    funTable FT[100];
    recTable RT[100];
    tokenList list;
    printf("\nLEVEL 4: AST, Symbol table, Type Checking, Semantic Rules modules work\n");
    do
    {
        printf("\n 1 : Print the token list.\n 2 : Verify the syntactic correctness\n 3 : Print abstract syntax tree\n 4 : Print Symbol Table\n 5 : Verify Semantic correctness\n 6 : Generate Assembly Code\n\nSelect option->");
        scanf("%d", &opt);
        switch(opt)
        {
            case 1:
                list=createTokenList(fp, kt);
                printTokenList(kt, list);
                break;
            case 2:
                P = parseInputSourceCode(fp, T, kt, G, &error, S);
                if(!error)
                {
                    printParseTree(P, tree);
                    // if(P!=NULL)
                    //     printf("\nParse Tree generated and printed in file tree.txt\n");
                }
                break;
            case 3:
                P = parseInputSourceCode(fp, T, kt, G, &error, S);
                if(error)
                    break;
                //parseTree A;
                A = createAbstractSyntaxTree(P);
                if(!error)
                {
                    printAST(A, tree, &totalAllocatedMemory);
                    if(A!=NULL)
                        printf("\nSize of AST is %d\n",totalAllocatedMemory);
                }
                break;
            case 4:
                P = parseInputSourceCode(fp, T, kt, G, &error, S);
                if(error)
                    break;

                
                A = createAbstractSyntaxTree(P);

                initSymbolTable(GT,FT,RT);

                createGlobalTable(GT,A);
                createRecordTable(RT,A);
                createSymbolTable( GT, FT, RT, A);
                printGT(GT,RT);
                //printRT(RT);
                printFT(FT,RT);

                break;
            case 5:
                P = parseInputSourceCode(fp, T, kt, G, &error, S);
                if(error)
                    break;
                
                A = createAbstractSyntaxTree(P);

                initSymbolTable(GT,FT,RT);

                createGlobalTable(GT,A);
                createRecordTable(RT,A);
                createSymbolTable( GT, FT, RT, A);
                //printGT(GT,RT);
                //printRT(RT);
                //printFT(FT,RT);
                char funname[50];
                strcpy(funname," ");
                typeParse(A,GT, FT,RT,funname);
                if(any_error==0)
                    printf("Code compiles successfully..........\n");
                break;
            case 6:
                P = parseInputSourceCode(fp, T, kt, G, &error, S);
                if(error)
                    break;
                
                A = createAbstractSyntaxTree(P);
                
                initSymbolTable(GT,FT,RT);

                createGlobalTable(GT,A);
                createRecordTable(RT,A);
                createSymbolTable( GT, FT, RT, A);
                //printGT(GT,RT);

                FILE *fp = fopen(argv[2],"w");
                fprintf(fp, ".model small\n.stack\n" );
                fprintf(fp, ".data\n" );
                int hval = hash("_main",100);
                for(i=0;i<100;i++)
                {
                    if(GT[i].filled == 1)
                        fprintf(fp, "%s dw 0\n", GT[i].name);
                    if(FT[hval].table[i].filled == 1)
                        fprintf(fp, "%s dw 0\n", FT[hval].table[i].name);

                }
                fprintf(fp, ".code\n");
                fprintf(fp,"%s" ,longtext);
                fprintf(fp, "\n\n\nstart proc\n\n\n");
                generateCode(GT,FT,RT,A,fp);
                //fprintf(fp, "true:\nmov AX,0\n" );
                //fprintf(fp, "false:\nmov AX,1\n" );
                fprintf(fp, "ret\n\n\nstart endp\nend start\n" );
                fclose(fp);
                printf("Generated Assembly code in %s\n",argv[2]);
                break;
            default:
                printf("\nPlease select a valid option\n");
        }
    }while(opt<1 || opt>6);
    fclose(g);
    // fclose(tree);
    return 0;
}