option - object oriented

app.c

#include <stdio.h>
#include "option.h"

option opt;	//グローバル空間に置くことで他モジュールからも参照可能

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

	opt = option_create( argc, argv );

	printf( "option_is_ver( opt ) = %d\n", option_is_ver( opt ) );
	printf( "option_is_help( opt ) = %d\n", option_is_help( opt ) );

	option_delete( opt );

	return 0;
}

option.c

#include <stdlib.h>
#include <string.h>
#include "option.h"

static analyze_option( option t, int argc, char *argv[] );

struct _option{
	bool ver;
	bool help;
};

option option_create( int argc, char *argv[] ) {
	option t = calloc( sizeof( struct _option ), 1 );
	analyze_option( t, argc, argv );
	return t;
}

static analyze_option( option t, int argc, char *argv[] ) {
	for( int i = 0; i < argc; i++ ) {
		if( strcmp( argv[ i ], "-ver" ) == 0 ) {
			t->ver = TRUE;
		}else if( strcmp( argv[ i ], "-help" ) == 0 ) {
			t->help = TRUE;
		}
	}
}

void option_delete( option t ) {
	free( t );
}

bool option_is_ver( option t ) {
	return ( t->ver == TRUE ? TRUE : FALSE );
}

bool option_is_help( option t ) {
	return ( t->help == TRUE ? TRUE : FALSE );
}

option.h

#pragma once

typedef enum _bool {
	FALSE = 0,
	TRUE
}bool;

typedef struct _option* option;

option option_create( int argc, char *argv[] );
void option_delete( option t );

bool option_is_ver( option t );
bool option_is_help( option t );