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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "./num.h"
#include "./tga.h"
#include "./upc.h"
#define UPC_A_WIDTH 113
#define UPC_A_HEIGHT 79
typedef struct {
int eflag;
int nflag;
char *ovalue;
} opts;
char *getInput( int index, char *argv[] );
opts parseOpts( int argc, char *argv[] );
void DrawBarcode( char *dst, const char *src );
void DrawNumbers( char *dst, const char *src );
int main(int argc, char *argv[]) {
// Parse CLI options
opts options = parseOpts( argc, argv );
// Parse CLI input
char *input = getInput( optind, argv );
// Set final element of input array to the appropriate check digit
input[11] = upc_a_calculate_check_digit( input );
// Create array of chars to represent 1D barcode
const char *barcode = create_upc_a( input );
// Allocate memory to hold image data
char *image = malloc( UPC_A_WIDTH * UPC_A_HEIGHT );
// Draw barcode to image data
DrawBarcode( image, barcode );
// Draw human-readable interpretation if '-e' is used
if( options.nflag ) {
DrawNumbers( image, input );
}
free( input );
// Create a .tga image file using image data
CreateTGA( options.ovalue, UPC_A_WIDTH, UPC_A_HEIGHT, image );
free( image );
return 0;
}
char *getInput( int index, char *argv[] ) {
char *result = malloc( 12 );
int k = 0;
for( int i = index; argv[i] != NULL; ++i ) {
for( int j = 0; j < strlen(argv[i]); ++j ) {
if( argv[i][j] < 58 && argv[i][j] > 47 ) {
result[k] = argv[i][j];
result[k] -= 48;
++k;
}
}
}
if( k != 11 ) {
printf( "Inappropriate input detected!\nPlease provide an 11-digit number.\n" );
}
return result;
}
opts parseOpts( int argc, char *argv[] ) {
opts options = { 0, 0, NULL };
int c;
while( ( c = getopt(argc, argv, "eno:")) != -1 ) {
switch( c ) {
case 'e':
options.eflag = 1;
break;
case 'n':
options.nflag = 1;
break;
case 'o':
options.ovalue = optarg;
break;
}
}
return options;
}
void DrawBarcode( char *dst, const char *src ) {
const char UPC_A_QUIET_ZONE[9] = {0};
for(int i = 0; i < UPC_A_HEIGHT; ++i) {
memcpy( dst + (i * UPC_A_WIDTH), &UPC_A_QUIET_ZONE, sizeof(UPC_A_QUIET_ZONE) );
memcpy( dst + 9 + (i * UPC_A_WIDTH), src, 95 );
memcpy( dst + 104 + (i * UPC_A_WIDTH), &UPC_A_QUIET_ZONE, sizeof(UPC_A_QUIET_ZONE) );
}
}
void DrawNumbers( char *dst, const char *src ) {
const int POSITION_0 = UPC_A_WIDTH * (UPC_A_HEIGHT - 16) + 1;
const int POSITION_1 = UPC_A_WIDTH * (UPC_A_HEIGHT - 16) + 14;
const int POSITION_2 = UPC_A_WIDTH * (UPC_A_HEIGHT - 16) + 59;
const int POSITION_3 = UPC_A_WIDTH * (UPC_A_HEIGHT - 16) + 104;
for(int i = 0; i < 16; ++i) {
memcpy( dst + POSITION_0 + (i * UPC_A_WIDTH), NUMBER[src[0]][i], sizeof(NUMBER[0][i]) );
}
for( int i = 0; i < 5; ++i ) {
for(int j = 0; j < 16; ++j) {
memcpy( dst + POSITION_1 + (j * UPC_A_WIDTH) + (i * 8), NUMBER[src[i + 1]][j], sizeof(NUMBER[0][j]) );
}
}
for( int i = 0; i < 5; ++i ) {
for(int j = 0; j < 16; ++j) {
memcpy( dst + POSITION_2 + (j * UPC_A_WIDTH) + (i * 8), NUMBER[src[i + 6]][j], sizeof(NUMBER[0][j]) );
}
}
for(int i = 0; i < 16; ++i) {
memcpy( dst + POSITION_3 + (i * UPC_A_WIDTH), NUMBER[src[11]][i], sizeof(NUMBER[0][i]) );
}
}
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