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

#define ARGC_ERROR 1
#define TOOMANYFILES_ERROR 2
#define CONFLICTING_OUTPUT_OPTIONS 3

#define MAXSTRINGS 1024
#define MAXPARAS 4096

#define HASHLEN 200
#define BUFLEN 256

// ================================================================= //

FILE *fin1, *fin2;
const char* files[2] = { NULL, NULL };

char buf[BUFLEN];
char *strings1[MAXSTRINGS], *strings2[MAXSTRINGS];

int showversion = 0, showbrief = 0, ignorecase = 0, report_identical = 0, showsidebyside = 0;
int showleftcolumn = 0, showunified = 0, showcontext = 0, suppresscommon = 0, diffnormal = 0;
int showhelp = 0;

int equal = 0, cnt = 0, count = 0;

int count1 = 0, count2 = 0;

// ================================================================ //

void init(int argc, const char* argv[]);
void setoption(const char* arg, const char* s, const char* t, int* value);
void diff_output_conflict_error(void);

void loadfiles(const char* filename1, const char* filename2);

void version(void);
void help(void);

void ignore_case(void);

void lineline(void);
void sideside(const char* filename1, const char* filename2);
void context (const char* filename1, const char* filename2);
void unified (const char* filename1, const char* filename2);

void quiet(const char* filename1, const char* filename2);
void loud (const char* filename1, const char* filename2);

int identical(const char* filename1, const char* filename2);