IMPLEMENTATION OF A MACRO PROCESSOR

IMPLEMENTATION OF A MACRO PROCESSOR

#include<stdio.h>

#include<conio.h>

#include<string.h>

#include<stdlib.h>

void main()

{

            char n,n1,c1,i,oper[20],opd[20],iopd[20],ilab[20];

            char fn[10][10],m[20][3];

            FILE *fp1,*fp2,*p[5];

            clrscr();

            printf("\nImplementation of A Macro Processor:");

            printf("\n------------------------------------\n\n");

            n=0;

            fp1=fopen("macin.txt","r");

            while(!feof(fp1))

            {

              fscanf(fp1,"%s%s%s",ilab,iopd,oper);

              if(strcmp(iopd,"macro")==0)

              n++;

            }

            printf("No.Of.Macros = %d\n",n);

            n1=n;

            printf("Enter the text filename: ");

            for(i=0;i<n;i++)

            {

              scanf("%s",fn[i]);

              p[i]=fopen(fn[i],"w");

            }

            n=0;

            rewind(fp1);

            while(!feof(fp1))

            {

              fscanf(fp1,"%s%s%s",ilab,iopd,oper);

              if(strcmp(iopd,"macro")==0)

              {

                strcpy(m[n],oper);

                fscanf(fp1,"%s%s%s",ilab,iopd,oper);

                while(strcmp(iopd,"mend")!=0)

                {

                  fprintf(p[n],"%s %s %s\n",ilab,iopd,oper);

                  fscanf(fp1,"%s%s%s",ilab,iopd,oper);

                }

                fclose(p[n]);

                n++;

              }

            }

            for(i=0;i<n1;i++)

              p[i]=fopen(fn[i],"r");

            fp2=fopen("macout.txt","w");

            rewind(fp1);

            fscanf(fp1,"%s%s%s",ilab,iopd,oper);

            while(!feof(fp1))

            {

              if(strcmp(iopd,"call")==0)

              {

                for(i=0;i<n1;i++)

                {

                  if(strcmp(m[i],oper)==0)

                  {

                        rewind(p[i]);

                        fscanf(p[i],"%s%s%s",ilab,iopd,oper);

                        while(!feof(p[i]))

                        {

                          fprintf(fp2,"%s %s %s\n",ilab,iopd,oper);

                          c1=1;

                          fscanf(p[i],"%s%s%s",ilab,iopd,oper);

                        }

                        break;

                  }

                }

              }

              if(c1!=1)

                fprintf(fp2,"%s %s %s\n",ilab,iopd,oper);

              c1=0;

              fscanf(fp1,"%s%s%s",ilab,iopd,oper);

            }

            fprintf(fp2,"%s %s %s\n",ilab,iopd,oper);

            printf("\nProgram Completed Successfully...");

            getch();

}

OUTPUT:

Implementation of A Macro Processor:

------------------------------------------------

No.Of.Macros = 2

Enter the text filename: macin

macout

Program Completed Successfully...

INPUT FILE:

MACIN.TXT

**        macro     m1

**        move      a,b

**        mend      --

**        macro                 m2

**        lda          b

**        mend      --

**        start       1000

**        lda         a

**        call         m1

**        call         m2

**        add        a,b

OUTPUT FILE:

MACOUT.TXT

**      macro      m1

**      move       a,b

**      mend       --

**      macro      m2

**      lda           b

**      mend       --

**      start        1000

**      lda          a

**      move      a,b

**      lda          b

**      add         a,b