Question & Answer: I have the follwing C code. I need to combine the put() function with the processline() function and put it…..

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Sample output:
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[azizitest@localhost venky]$ vi input.txt
[azizitest@localhost venky]$ cc sample2.c
[azizitest@localhost venky]$ ./a.out input.txt
Directive: hi
Address: hello
Data: (null)
Directive: welcome
Address: to
Data: the
Directive: software
Address: solution
Data: (null)
Directive: from
Address: chennai
Data: (null)
Directive: Please
Address: give
Data: report
[azizitest@localhost venky]$

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input.txt:
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hi hello
welcome to the new
software solution
from chennai
Please give report
~
~
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Modified Source-code:
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
unsigned char * mem;
int reg[9];
int pc;
int memsize;
union converter
{
unsigned int integer;
unsigned char bytes[4];
};

void put(char* directive, char* address, char* data)
{
if (strcmp(directive,”.size”)==0)
{
int size = (int)strtol (address, NULL, 16);
//NEED TO FIND OUT EXACT MEANING OF size DIRECTIVE, num of
chars or bytes
mem = (unsigned char *) malloc(sizeof(char)*size);
memsize = size*sizeof(char);
}
else if(strcmp(directive,”.text”)==0)
{
int add = (int) strtol (address,NULL,16);
pc = add;
char byte[3];
while(*data!=’’)
{
byte[0] = *data;
data++;
byte[1] = *data;
data++;
byte[2] = ‘’;
unsigned int bytedata = (unsigned int) strtol
(byte,NULL,16);

printf(“%x”,(char)bytedata);

mem[add] = (char) strtol(byte,NULL,16);
add++;

}

}
else if(strcmp(directive,”.string”)==0)
{
int add = (int) strtol (address,NULL,16);
data ++;
mem[add] = *data;
data++;
printf(“%s”,data);
int i =1;
while(*data!=’’)
{
mem[add+i] = *data;
i++;
data++;
}
}

else if(strcmp(directive,”.long”)==0)
{
int add = (int) strtol (address,NULL,16);
printf(“Data: %sn”,data);
unsigned int value = (int) strtol (data,NULL,16);
union converter con;
con.integer = value;
printf(“Value: %dn”,value);
printf(“n%x%x%x%x”,con.bytes[0],con.bytes[1],con.bytes[2],con.bytes[3]);
mem[add] = con.bytes[0];
mem[add+1] = con.bytes[1];
mem[add+2] = con.bytes[2];
mem[add+3] = con.bytes[3];
}
else if(strcmp(directive,”.byte”)==0)
{
int add = (int) strtol (address,NULL,16);
int bytedata = (int) strtol (data,NULL,16);
mem[add] = (char) bytedata;
}
}

void processLine(char * line)
{
char* directive;
char* address;
char* data;
directive = strtok(line,” “);
printf(“Directive: %sn”,directive);
address = strtok(NULL,” “);
size_t lena =strlen(address)-1;
if(address[lena]==’n’)
{
address[lena] = ‘’;
}
printf(“Address: %sn”,address);
data = strtok(NULL,” “);
if(data!=NULL)
{
size_t lend = strlen(data)-1;
if(data[lend]==’n’)
{
data[lend]=’’;
}
}
printf(“Data: %sn”,data);
put(directive,address,data);
}

int main(int argc, char ** argv){

if(argc!=2)
{
printf(“Argument must be specified.n”);
exit(0);
}
if (strcmp(argv[1],”-h”)==0)
{
printf(“Usage: y86emu file.y86.n”);
exit(0);
}
FILE *file;
file = fopen(argv[1], “r”);
if (file == NULL)
{
printf(“There is no file, or it could not be opened.n”);
exit(0);
}
char * line = NULL;
size_t len = 0;
ssize_t read;
while((read = getline(&line, &len, file)) != -1)
{
processLine(line);
}
return 0;
}