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analyzer.c
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analyzer.c
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#include<stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#define MAX_EXTENSION_LENGTH 2024
int main(int argc, char *argv[]){
// 2 files arguments, 1st file is original, 2nd file is a carrier
if(argc != 3){
printf("Usage: %s <original file> <carrier file>\n", argv[0]);
return 1;
}
// open files
FILE *original = fopen(argv[1], "r");
FILE *carrier = fopen(argv[2], "r");
if(original == NULL || carrier == NULL){
printf("Error opening files\n");
return 1;
}
int differ_bits[8] = {0};
uint8_t byte_img1;
uint8_t byte_img2;
int n = 8;
while (fread(&byte_img1, 1, 1, original) && fread(&byte_img2, 1, 1, carrier)) {
uint8_t bit_img1= 0;
uint8_t bit_img2= 0;
for (int i = 0; i < n; i++) {
bit_img1 = byte_img1 & 0x01;
bit_img2 = byte_img2 & 0x01;
if (bit_img1 != bit_img2)
differ_bits[7-i]++;
byte_img1 = (byte_img1 >> 1);
byte_img2 = (byte_img2 >> 1);
}
}
// while (fread(&byte_img2, 1, 1, carrier))
// differ_bits++;
//printf("Total bit difference %d\n", differ_bits);
int sum = 0;
for (int i = 0; i < 8; i++) {
sum += differ_bits[i];
printf("%d ", differ_bits[i]);
}
printf("Total bit difference %d\n", sum);
}