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Macro Pass-1 in C Programming


/*
// Source file (*m_source)

MACRO ##    ##    ##
INCR  &ARG1 &ARG2 &ARG3
A     1,    &ARG1 ##
A     2,    &ARG2 ##
A     3,    &ARG3 ##
MEND  ##    ##    ##
MACRO ##    ##    ##
AMIT  &ARG1 &ARG2 &ARG3
B     1,    &ARG1 ##
B     2,    &ARG2 ##
B     3,    &ARG3 ##
MEND  ##    ##    ##
INCR  DATA1,      DATA2,      DATA3
AMIT  DATA3,      DATA2,      DATA1

*/

#include<stdio.h>
#include<string.h>



char col1[30],col2[30],col3[30],col4[30];
char ala_col1[30],ala_col2[30];
int i,mdtc=1,mntc=1,ala_cnt=1,j,p_flag1=0,p_flag2=0,p_flag3=0;
FILE *m_source,*m_mnt,*m_mdt,*ala;




int main()
{
     
      remove("m_mdt.txt");
      remove("macro_mnt.txt");
      remove("m_ala.txt");
     
      // To read the source code and simply display it
     
      m_source=fopen("macro_def.txt","r");
     
     
      for(i=0;i<14;i++)
      {
          fscanf(m_source,"%s %s %s %s",col1,col2,col3,col4);
          printf("\n %s\t%s\t%s\t%s",col1,col2,col3,col4);
      }
     
     
     
      fclose(m_source);
     
     
     
      m_source=fopen("macro_def.txt","r");
      for(i=0;i<14;i++)
      {          
           
                 
       fscanf(m_source,"%s %s %s %s",col1,col2,col3,col4);
                 
                 
                 
        if((strcmp(col1,"MACRO"))==0)
        {
                       
                 
         fscanf(m_source,"%s %s %s %s",col1,col2,col3,col4);
         i++;
                       
                       
          // Write a macro name to macro name table
             m_mnt=fopen("macro_mnt.txt","a");
             {
                     fprintf(m_mnt,"\n%s\t%d",col1,mdtc);
             }
                       
             fclose(m_mnt);
             mntc++;
           
             // Check whether the arguments already exists or not; if not, then make the entry of it into ALA
                       
      ala=fopen("m_ala.txt","r");
      if(ala != NULL)
      {
           
            for(j=1;j<=3;j++)
            {
            fscanf(ala,"%s %s",ala_col1,ala_col2);
     
            if((strcmp(col2,ala_col2))==0)
            {
                  p_flag1=1;
            }
            if((strcmp(col3,ala_col2))==0)
            {
                  p_flag2=1;
            }
            if((strcmp(col4,ala_col2))==0)
                                          {
                  p_flag3=1;
            }
                             
                             
                             
            }
            fclose(ala);
            }
                       
                       
                       
            // Prepare Argument List Array
            ala=fopen("m_ala.txt","a");
           
            {
            if (p_flag1==0)
            {
                                   
                  if((strcmp(col2,"##"))!=0)
                  {
                  fprintf(ala,"\n%d\t%s",ala_cnt,col2);
                  ala_cnt++;
                  }
                       
            }
                             
            if (p_flag2==0)
            {
                                   
                  if((strcmp(col3,"##"))!=0)
                  {
                             
                  fprintf(ala,"\n%d\t%s",ala_cnt,col3);
                  ala_cnt++;
                  }
                             
            }
                             
                  if (p_flag3==0)
                  {
                        printf("col4 = %s",col4);
                        if((strcmp(col4,"##"))!=0)
                        {
                                         
                        fprintf(ala,"\n%d\t%s",ala_cnt,col4);
                        ala_cnt++;
                                    }
           
                        }
                                                           
                             
                  }
                  fclose(ala);
           
                 
                       
                       
            // To write into Macro Definition Table
                       
            m_mdt=fopen("m_mdt.txt","a");

                              fprintf(m_mdt,"\n%d\t%s\t%s\t%s\t%s",mdtc,col1,col2,col3,col4);
                       
            fclose(m_mdt);
                 
            mdtc++;
            back:
                       
            // To substitute index notation for arguments
            fscanf(m_source,"%s %s %s %s",col1,col2,col3,col4);
            i++;
                       
            // Find index number
            ala=fopen("m_ala.txt","r");
                       
                       
            for(j=1;j<=(ala_cnt-1);j++)
            {
                  fscanf(ala,"%s %s",ala_col1,ala_col2);
                  if ((strcmp(col3,ala_col2))==0)
                  {
                  m_mdt=fopen("m_mdt.txt","a");
                                    fprintf(m_mdt,"\n%d\t%s\t%s\t%s\t%s",mdtc,col1,col2,ala_col1,col4);
                                    fclose(m_mdt);
                              }
                             
                  }
                  fclose(ala);
                       
                       
                       
                  if ((strcmp(col1,"MEND"))==0)
                  {
                        m_mdt=fopen("m_mdt.txt","a");
                                    fprintf(m_mdt,"\n%d\t%s\t%s\t%s\t%s",mdtc,col1,col2,col3,col4);
                  fclose(m_mdt);
                  mdtc++;
                  }
                  else
                  {
                        mdtc++;    
                        goto back;
                  }
                       
                       
                       
                       
                       
                  }
                 
                 
                 
                 
     
      }
      fclose(m_source);
     
     
     
      return 0;
}

 
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