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217 lines
7.3 KiB
C
217 lines
7.3 KiB
C
/*
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* kartrak.c
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*
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* This code generates KarTrak codes as were previously used in the rail industry of the US
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* (description below). Output is as an SVG file. This system is now obsolete but perhaps
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* this will be of interest to model railway enthusiasts.
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*
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* "KarTrak, sometimes KarTrak ACI (for Automatic Car Identification) is a colored
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* bar code system designed to automatically identify rail cars and other rolling stock.
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* KarTrak was made a requirement in North America, but technical problems led to
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* abandonment of the system in the late 1970s."
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*
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* https://en.wikipedia.org/wiki/KarTrak
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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void print_head(char car_number[], double bordersize) {
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printf("<?xml version=\"1.0\" standalone=\"no\"?>\n");
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printf("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n");
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printf(" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n");
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printf("<svg width=\"%.2fin\" height=\"%.2fin\" version=\"1.1\"\n", 5.75 + (2 * bordersize), 17.5 + (2 * bordersize));
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printf(" xmlns=\"http://www.w3.org/2000/svg\">\n");
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printf(" <desc>KarTrak ACI %s</desc>\n\n", car_number);
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printf(" <g id=\"kartrak\" fill = \"#000000\">\n");
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printf(" <rect x=\"0in\" y=\"0in\" width=\"%.2fin\" height=\"%.2fin\" fill=\"#000000\" />\n", 5.75 + (2 * bordersize), 17.5 + (2 * bordersize));
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}
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void print_foot() {
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printf(" </g>\n");
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printf("</svg>\n");
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}
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void print_check(double x, double y) {
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/* Print checkerboard */
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int w, h;
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for (h = 0; h < 6; h++) {
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for (w = 0; w < 69; w++) {
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if (((w + h) % 2) == 0) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"0.08in\" height=\"0.08in\" fill=\"#ffffff\" />\n", x + (0.083 * w), y + (0.083 * h));
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}
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}
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}
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}
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void hrt(double x, double y, char c[]) {
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/* Add text to the left */
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printf(" <text x=\"%.2fin\" y=\"%.2fin\" font-family=\"Verdana\" font-size=\"25\">%s</text>\n", x + 0.2, y + 0.9, c);
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}
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void back_square(double x, double y) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"0.17in\" height=\"0.25in\" fill=\"#ffffff\" />\n", x + 0.2, y + 0.7);
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}
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void print_zero(double x, double y) {
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print_check(x, y);
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"0.5in\" fill=\"#0000e0\" />\n", x, y + 0.5);
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hrt(x, y, "0");
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}
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void print_one(double x, double y) {
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print_check(x, y);
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print_check(x, y + 0.5);
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back_square(x, y);
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hrt(x, y, "1");
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}
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void print_two(double x, double y) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"0.5in\" fill=\"#ef0000\" />\n", x, y);
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print_check(x, y + 0.5);
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back_square(x, y);
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hrt(x, y, "2");
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}
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void print_three(double x, double y) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"0.5in\" fill=\"#ef0000\" />\n", x, y + 0.5);
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hrt(x, y, "3");
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}
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void print_four(double x, double y) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"1.00in\" fill=\"#ef0000\" />\n", x, y);
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hrt(x, y, "4");
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}
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void print_five(double x, double y) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"0.5in\" fill=\"#0000e0\" />\n", x, y + 0.5);
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hrt(x, y, "5");
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}
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void print_six(double x, double y) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"0.5in\" fill=\"#0000e0\" />\n", x, y);
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print_check(x, y + 0.5);
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back_square(x, y);
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hrt(x, y, "6");
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}
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void print_seven(double x, double y) {
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print_check(x, y);
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"0.5in\" fill=\"#ef0000\" />\n", x, y + 0.5);
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hrt(x, y, "7");
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}
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void print_eight(double x, double y) {
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print_check(x, y + 0.5);
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back_square(x, y);
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hrt(x, y, "8");
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}
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void print_nine(double x, double y) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"1.00in\" fill=\"#0000e0\" />\n", x, y);
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hrt(x, y, "9");
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}
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void print_ten(double x, double y) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"0.5in\" fill=\"#ef0000\" />\n", x, y);
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"5.75in\" height=\"0.5in\" fill=\"#0000e0\" />\n", x, y + 0.5);
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hrt(x, y, "10");
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}
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void print_start(double bordersize) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"4.50in\" height=\"0.5in\" fill=\"#0000e0\" />\n", bordersize, 16.5 + bordersize);
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"4.50in\" height=\"0.5in\" fill=\"#ef0000\" />\n", bordersize + 1.25, 17.0 + bordersize);
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hrt(bordersize, 16.0 + bordersize, "START");
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}
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void print_stop(double bordersize) {
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"4.50in\" height=\"0.5in\" fill=\"#0000e0\" />\n", bordersize + 1.25, 1.35 + bordersize);
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printf(" <rect x=\"%.2fin\" y=\"%.2fin\" width=\"4.50in\" height=\"0.5in\" fill=\"#ef0000\" />\n", bordersize, 1.85 + bordersize);
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hrt(bordersize, 1.35 + bordersize, "STOP");
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}
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void print_label(int posn, double bordersize, int digit) {
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double y = ((17.5 + bordersize + 0.375) - ((posn + 1) * 1.375));
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switch (digit) {
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case 0: print_zero(bordersize, y); break;
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case 1: print_one(bordersize, y); break;
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case 2: print_two(bordersize, y); break;
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case 3: print_three(bordersize, y); break;
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case 4: print_four(bordersize, y); break;
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case 5: print_five(bordersize, y); break;
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case 6: print_six(bordersize, y); break;
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case 7: print_seven(bordersize, y); break;
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case 8: print_eight(bordersize, y); break;
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case 9: print_nine(bordersize, y); break;
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case 10: print_ten(bordersize, y); break;
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}
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}
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int main(int argc, char** argv) {
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int in_length;
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char car_number[12];
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int i;
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int checksum = 0;
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int checkdigit;
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double bordersize = 3.0;
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if (argc != 2) {
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/* Only command line input should be the number to encode */
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printf("Usage: kartrak {number}\n");
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printf("Where {number} is the number to be encoded, up to 10 digits\n");
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return 0;
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} else {
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in_length = strlen(argv[1]);
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if (in_length > 10) {
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/* Check maximum length */
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printf("Input data too long\n");
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return 0;
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} else {
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/* Add padding if needed */
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strcpy(car_number, "");
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for(i = in_length; i < 10; i++) {
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strcat(car_number, "0");
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}
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strcat(car_number, argv[1]);
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}
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}
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/* Check input is numeric */
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for (i = 0; i < 10; i++) {
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if ((car_number[i] < '0') || (car_number[i] > '9')) {
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printf("Invalid character(s) in input data\n");
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return 0;
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}
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checksum += (car_number[i] - '0') * (1 << i);
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}
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/* Calculate check digit */
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checkdigit = checksum % 11;
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print_head(car_number, bordersize);
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/* Start character */
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print_start(bordersize);
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/* Data */
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for (i = 0; i < 10; i++) {
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print_label((i + 1), bordersize, car_number[i] - '0');
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}
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/* Stop character */
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print_stop(bordersize);
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/* Check digit */
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print_label(12, bordersize, checkdigit);
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print_foot();
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return (EXIT_SUCCESS);
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}
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