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https://github.com/Next-Flip/Momentum-Firmware.git
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Rename plugins to external
This commit is contained in:
Willy-JL
344
applications/external/barcode_gen/barcode_validator.c
vendored
Normal file
344
applications/external/barcode_gen/barcode_validator.c
vendored
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@@ -0,0 +1,344 @@
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#include "barcode_validator.h"
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void barcode_loader(BarcodeData* barcode_data) {
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switch(barcode_data->type_obj->type) {
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case UPCA:
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case EAN8:
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case EAN13:
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ean_upc_loader(barcode_data);
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break;
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case CODE39:
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code_39_loader(barcode_data);
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break;
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case CODE128:
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code_128_loader(barcode_data);
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break;
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case UNKNOWN:
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barcode_data->reason = UnsupportedType;
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barcode_data->valid = false;
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default:
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break;
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}
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}
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/**
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* Calculates the check digit of a barcode if they have one
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* @param barcode_data the barcode data
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* @returns a check digit or -1 for either an invalid
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*/
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int calculate_check_digit(BarcodeData* barcode_data) {
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int check_digit = -1;
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switch(barcode_data->type_obj->type) {
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case UPCA:
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case EAN8:
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case EAN13:
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check_digit = calculate_ean_upc_check_digit(barcode_data);
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break;
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case CODE39:
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case CODE128:
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case UNKNOWN:
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default:
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break;
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}
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return check_digit;
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}
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/**
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* Calculates the check digit of barcode types UPC-A, EAN-8, & EAN-13
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*/
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int calculate_ean_upc_check_digit(BarcodeData* barcode_data) {
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int check_digit = 0;
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int odd = 0;
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int even = 0;
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int length = barcode_data->type_obj->min_digits;
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//Get sum of odd digits
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for(int i = 0; i < length; i += 2) {
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odd += furi_string_get_char(barcode_data->raw_data, i) - '0';
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}
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//Get sum of even digits
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for(int i = 1; i < length; i += 2) {
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even += furi_string_get_char(barcode_data->raw_data, i) - '0';
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}
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if(barcode_data->type_obj->type == EAN13) {
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check_digit = even * 3 + odd;
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} else {
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check_digit = odd * 3 + even;
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}
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check_digit = check_digit % 10;
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return (10 - check_digit) % 10;
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}
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/**
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* Loads and validates Barcode Types EAN-8, EAN-13, and UPC-A
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* barcode_data and its strings should already be allocated;
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*/
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void ean_upc_loader(BarcodeData* barcode_data) {
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int barcode_length = furi_string_size(barcode_data->raw_data);
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int min_digits = barcode_data->type_obj->min_digits;
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int max_digit = barcode_data->type_obj->max_digits;
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//check the length of the barcode
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if(barcode_length < min_digits || barcode_length > max_digit) {
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barcode_data->reason = WrongNumberOfDigits;
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barcode_data->valid = false;
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return;
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}
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//checks if the barcode contains any characters that aren't a number
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for(int i = 0; i < barcode_length; i++) {
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char character = furi_string_get_char(barcode_data->raw_data, i);
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int digit = character - '0'; //convert the number into an int (also the index)
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if(digit < 0 || digit > 9) {
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barcode_data->reason = InvalidCharacters;
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barcode_data->valid = false;
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return;
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}
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}
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int check_digit = calculate_check_digit(barcode_data);
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char check_digit_char = check_digit + '0';
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barcode_data->check_digit = check_digit;
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//if the barcode length is at max length then we will verify if the check digit is correct
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if(barcode_length == max_digit) {
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//append the raw_data to the correct data string
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furi_string_cat(barcode_data->correct_data, barcode_data->raw_data);
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//append the check digit to the correct data string
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furi_string_set_char(barcode_data->correct_data, min_digits, check_digit_char);
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}
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//if the barcode length is at min length, we will calculate the check digit
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if(barcode_length == min_digits) {
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//append the raw_data to the correct data string
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furi_string_cat(barcode_data->correct_data, barcode_data->raw_data);
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//append the check digit to the correct data string
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furi_string_push_back(barcode_data->correct_data, check_digit_char);
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}
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}
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void code_39_loader(BarcodeData* barcode_data) {
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int barcode_length = furi_string_size(barcode_data->raw_data);
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int min_digits = barcode_data->type_obj->min_digits;
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// int max_digit = barcode_data->type_obj->max_digits;
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//check the length of the barcode, must contain atleast a character,
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//this can have as many characters as it wants, it might not fit on the screen
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if(barcode_length < min_digits) {
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barcode_data->reason = WrongNumberOfDigits;
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barcode_data->valid = false;
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return;
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}
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FuriString* barcode_bits = furi_string_alloc();
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FuriString* temp_string = furi_string_alloc();
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//add starting and ending *
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if(!furi_string_start_with(barcode_data->raw_data, "*")) {
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furi_string_push_back(temp_string, '*');
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furi_string_cat(temp_string, barcode_data->raw_data);
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furi_string_set(barcode_data->raw_data, temp_string);
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}
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if(!furi_string_end_with(barcode_data->raw_data, "*")) {
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furi_string_push_back(barcode_data->raw_data, '*');
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}
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furi_string_free(temp_string);
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barcode_length = furi_string_size(barcode_data->raw_data);
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//Open Storage
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Storage* storage = furi_record_open(RECORD_STORAGE);
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FlipperFormat* ff = flipper_format_file_alloc(storage);
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if(!flipper_format_file_open_existing(ff, CODE39_DICT_FILE_PATH)) {
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FURI_LOG_E(TAG, "Could not open file %s", CODE39_DICT_FILE_PATH);
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barcode_data->reason = MissingEncodingTable;
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barcode_data->valid = false;
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} else {
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FuriString* char_bits = furi_string_alloc();
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for(int i = 0; i < barcode_length; i++) {
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char barcode_char = toupper(furi_string_get_char(barcode_data->raw_data, i));
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//convert a char into a string so it used in flipper_format_read_string
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char current_character[2];
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snprintf(current_character, 2, "%c", barcode_char);
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if(!flipper_format_read_string(ff, current_character, char_bits)) {
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FURI_LOG_E(TAG, "Could not read \"%c\" string", barcode_char);
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barcode_data->reason = InvalidCharacters;
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barcode_data->valid = false;
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break;
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} else {
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FURI_LOG_I(
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TAG, "\"%c\" string: %s", barcode_char, furi_string_get_cstr(char_bits));
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furi_string_cat(barcode_bits, char_bits);
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}
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flipper_format_rewind(ff);
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}
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furi_string_free(char_bits);
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}
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//Close Storage
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flipper_format_free(ff);
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furi_record_close(RECORD_STORAGE);
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furi_string_cat(barcode_data->correct_data, barcode_bits);
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furi_string_free(barcode_bits);
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}
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/**
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* Loads a code 128 barcode
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*
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* Only supports character set B
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*/
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void code_128_loader(BarcodeData* barcode_data) {
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int barcode_length = furi_string_size(barcode_data->raw_data);
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//the start code for character set B
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int start_code_value = 104;
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//The bits for the start code
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const char* start_code_bits = "11010010000";
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//The bits for the stop code
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const char* stop_code_bits = "1100011101011";
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int min_digits = barcode_data->type_obj->min_digits;
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// int max_digit = barcode_data->type_obj->max_digits;
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/**
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* A sum of all of the characters values
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* Ex:
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* Barcode Data : ABC
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* A has a value of 33
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* B has a value of 34
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* C has a value of 35
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*
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* the checksum_adder would be (33 * 1) + (34 * 2) + (35 * 3) + 104 = 310
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*
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* Add 104 since we are using set B
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*/
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int checksum_adder = start_code_value;
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/**
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* Checksum digits is the number of characters it has read so far
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* In the above example the checksum_digits would be 3
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*/
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int checksum_digits = 0;
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//the calculated check digit
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int final_check_digit = 0;
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//check the length of the barcode, must contain atleast a character,
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//this can have as many characters as it wants, it might not fit on the screen
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if(barcode_length < min_digits) {
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barcode_data->reason = WrongNumberOfDigits;
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barcode_data->valid = false;
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return;
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}
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//Open Storage
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Storage* storage = furi_record_open(RECORD_STORAGE);
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FlipperFormat* ff = flipper_format_file_alloc(storage);
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FuriString* barcode_bits = furi_string_alloc();
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//add the start code
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furi_string_cat(barcode_bits, start_code_bits);
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if(!flipper_format_file_open_existing(ff, CODE128_DICT_FILE_PATH)) {
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FURI_LOG_E(TAG, "Could not open file %s", CODE128_DICT_FILE_PATH);
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barcode_data->reason = MissingEncodingTable;
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barcode_data->valid = false;
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} else {
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FuriString* value = furi_string_alloc();
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FuriString* char_bits = furi_string_alloc();
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for(int i = 0; i < barcode_length; i++) {
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char barcode_char = furi_string_get_char(barcode_data->raw_data, i);
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//convert a char into a string so it used in flipper_format_read_string
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char current_character[2];
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snprintf(current_character, 2, "%c", barcode_char);
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//get the value of the character
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if(!flipper_format_read_string(ff, current_character, value)) {
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FURI_LOG_E(TAG, "Could not read \"%c\" string", barcode_char);
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barcode_data->reason = InvalidCharacters;
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barcode_data->valid = false;
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break;
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}
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//using the value of the character, get the characters bits
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if(!flipper_format_read_string(ff, furi_string_get_cstr(value), char_bits)) {
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FURI_LOG_E(TAG, "Could not read \"%c\" string", barcode_char);
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barcode_data->reason = EncodingTableError;
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barcode_data->valid = false;
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break;
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} else {
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//add the bits to the full barcode
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furi_string_cat(barcode_bits, char_bits);
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//calculate the checksum
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checksum_digits += 1;
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checksum_adder += (atoi(furi_string_get_cstr(value)) * checksum_digits);
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FURI_LOG_D(
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TAG,
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"\"%c\" string: %s : %s : %d : %d : %d",
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barcode_char,
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furi_string_get_cstr(char_bits),
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furi_string_get_cstr(value),
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checksum_digits,
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(atoi(furi_string_get_cstr(value)) * checksum_digits),
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checksum_adder);
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}
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//bring the file pointer back to the beginning
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flipper_format_rewind(ff);
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}
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//calculate the check digit and convert it into a c string for lookup in the encoding table
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final_check_digit = checksum_adder % 103;
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int length = snprintf(NULL, 0, "%d", final_check_digit);
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char* final_check_digit_string = malloc(length + 1);
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snprintf(final_check_digit_string, length + 1, "%d", final_check_digit);
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//after the checksum has been calculated, add the bits to the full barcode
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if(!flipper_format_read_string(ff, final_check_digit_string, char_bits)) {
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FURI_LOG_E(TAG, "Could not read \"%s\" string", final_check_digit_string);
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barcode_data->reason = EncodingTableError;
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barcode_data->valid = false;
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} else {
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//add the check digit bits to the full barcode
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furi_string_cat(barcode_bits, char_bits);
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FURI_LOG_D(
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TAG,
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"\"%s\" string: %s",
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final_check_digit_string,
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furi_string_get_cstr(char_bits));
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}
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free(final_check_digit_string);
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furi_string_free(value);
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furi_string_free(char_bits);
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}
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//add the stop code
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furi_string_cat(barcode_bits, stop_code_bits);
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//Close Storage
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flipper_format_free(ff);
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furi_record_close(RECORD_STORAGE);
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furi_string_cat(barcode_data->correct_data, barcode_bits);
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furi_string_free(barcode_bits);
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}
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