First Pass of an Assembler

Here is the code for First Pass of an Assembler.

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#include<stdio.h>

#include<string.h>

int main (void)

{

char name[8][8],value[8][4];

inti,j,l,len,k=0,val=-4,m=0;

char l1[8][6],l4[8][6];

int l2[8],l3[8];

char c1[8][6]={{"ABCD"},{"NULL"},{"NULL"},{"NULL"},{"NULL"},{"FOUR"},{"TEMP"},{"NULL"}};

char c2[8][6]={{"START"},{"USING"},{"L"},{"A"},{"ST"},{"DC"},{"DC"},{"END"}};

char c3[8][6]={{"0"},{"*"},{"1"},{"1"},{"1"},{"F4"},{"1F"},{"NULL"}};

char c4[8][6]={{"NULL"},{"15"},{"FOUR"},{"=F5"},{"TEMP"},{"NULL"},{"NULL"},{"NULL"}};

char mot[8][8]={"L","ST","A"};

for(i=0;i<8;i++)

{

printf("%s%s%s%s%s%s%s%s",c1[i],"\t",c2[i],"\t",c3[i],"\t",c4[i],"\n");

}

for(i=0;i<8;i++)

{

for(m=0;m<3;m++)

{

if(strcmp(c2[i],mot[m])==0||strcmp(c2[i],"DC")==0)

{

val+=4;

break;

}

}

if(strcmp(c1[i],"NULL")!=0)

{

          strcpy(l1[k],c1[i]);

l2[k]=val;

k++; 

}

}

printf("Symbol Table");

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

for(i=0;i<k;i++)

{

if(l2[i]==-4)

l2[i]=0;

printf("%s\t%d\t\n\n",l1[i],l2[i]);

}

return 0;

}

LITERAL Table:

#include<stdio.h>

#include<string.h>

int main (void)

{

char name[8][8],value[8][4];

inti,j,l,k=0,val=0;

int m=0,n=0;

char l1[8][6],ch='R';

int l2[8],l3[8];

char c1[8][6]={{"ABCD"},{"NULL"},{"NULL"},{"NULL"},{"NULL"},{"FOUR"},{"TEMP"},{"NULL"}};

char c2[8][6]={{"START"},{"USING"},{"L"},{"A"},{"ST"},{"DC"},{"Dc"},{"END"}};

char c3[8][6]={{"0"},{"*"},{"1"},{"1"},{"1"},{"F4"},{"1F"},{"NULL"}};

char c4[8][6]={{"NULL"},{"15"},{"FOUR"},{"=F5"},{"TEMP"},{"NULL"},{"NULL"},{"NULL"}};

char mot[8][8]={{"L"},{"A"},{"ST"}};

char pot[8][8]={{"START"},{"END"},{"USING"},{"DC"}};

for(i=0;i<8;i++)

{

printf("%s%s%s%s%s%s%s%s",c1[i],"\t",c2[i],"\t",c3[i],"\t",c4[i],"\n");

}

for(i=0;i<8;i++)

{

for(n=0;n<3;n++)

{

if(strcmp(c2[i],mot[n])==0||strcmp(c2[i],"DC")==0)

{

val+=4;

}

}

if(c4[i][0]=='=')

{

printf("Literal Found");

for(l=0;l<strlen(c4[i]);l++)

l1[k][l]=c4[i][l];   

}

}

l2[k]=val;

l3[k]=4;

k++;

printf("\n\n\tLITERAL TABLE\n");

printf("%s\t%s\t%s\t%s\n","Symbol","Value","length","Relocation");

for(i=0;i<k;i++)

{

printf("%s\t%d\t%d\t%c\n",l1[i],l2[i],l3[i],ch);

}

return 0;

}