//module for identifying numeric constants as hex,bin,decimal
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
char v [30];
char value [30];
int error= 0;
char * check (char n [], int w )
{
extern int num_count;
extern int line_count;
extern int err_count;
int i;
int pad;
int ln= strlen(n );
int dn= 0,t,y,x,l,j= 0;
char r [30];
char c=n [ln -1];
if(! isdigit(n [0]))
{
printf("Error");
exit(0);
}
for(i= 0;i<ln -1;i++ )
{
if(! (isdigit(n [i ]) || (n [i ]>= 'a' && n [i ]<= 'f')))
{printf("\nNot a Valid Number Representation (%d) ",line_count );err_count++; }
}
for(i= 0;i<ln -1;i++ )
value [i ]=n [i ];
value [i ]= '\0';
l= strlen(value );
switch(c )
{
case 'b':
break;
case 'h':
for(i= 0;i<l;i++ )
{
switch(value [i ])
{
case '0': strcpy(r+j, "0000");
break;
case '1': strcpy(r+j, "0001");
break;
case '2': strcpy(r+j, "0010");
break;
case '3': strcpy(r+j, "0011");
break;
case '4': strcpy(r+j, "0100");
break;
case '5': strcpy(r+j, "0101");
break;
case '6': strcpy(r+j, "0110");
break;
case '7': strcpy(r+j, "0111");
break;
case '8': strcpy(r+j, "1000");
break;
case '9': strcpy(r+j, "1001");
break;
case 'a': strcpy(r+j, "1010");
break;
case 'b': strcpy(r+j, "1011");
break;
case 'c': strcpy(r+j, "1100");
break;
case 'd': strcpy(r+j, "1101");
break;
case 'e': strcpy(r+j, "1110");
break;
case 'f': strcpy(r+j, "1111");
break; }
j+= 4;
}
r [j ]= '\0';
strcpy(value,r );
break;
case 'd':
l= strlen(value );
for(i= 0;i<l;i++ )
{
t=value [i ]-48;
dn=dn+ pow(10,l-i -1)*t;
}
i= 0;
while(dn> 0)
{
x=dn% 2;
value [i ]=x +48;
i++;
dn=dn/ 2;
}
value [i ]= '\0';
l= strlen(value );
y= 8-l% 8;
y=y% 8;
for(j= 1;j<=y;j++ )
value [i++ ]= '0';
value [i ]= '\0';
l= strlen(value );
for(i= 0;i<strlen (value );i++ )
r [l-i -1]=value [i ];
r [i ]= '\0';
strcpy(value,r );
break;
default: printf("\nType of data unknown line (%d)",line_count );
err_count++;
}
l= strlen(value );
switch(w )
{
case -1:
if(l<= 8) pad= 8;
else if(l> 8 && l<= 16) pad= 16;
break;
case 0: pad= 8;
break;
case 1: pad= 16;
break;
}
l= strlen(value );
if(pad-l> 0)
{
for(i= 0;i<pad-l;i++ )
v [i ]= '0';
v [i ]= '\0';
strcat(v,value );
}
else if(pad==l ) strcpy(v,value );
else {printf("\nData Out of Range line(%d)",line_count );err_count++; }
return v;
}
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