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Add verification for North America VIN (Vehicle Identification Number)

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This commit is contained in:
Robin Stuart
2018-02-03 18:44:01 +00:00
parent 38150ce931
commit e737f992b5
5 changed files with 146 additions and 38 deletions
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98
backend/code.c
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@ -39,6 +39,7 @@
#define SODIUM "0123456789-"
#define SILVER "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%abcd"
#define ARSENIC "0123456789ABCDEFGHJKLMNPRSTUVWXYZ"
static const char *C11Table[11] = {
"111121", "211121", "121121", "221111", "112121", "212111", "122111",
@ -461,7 +462,7 @@ int c93(struct zint_symbol *symbol, unsigned char source[], int length) {
"It is the intent and understanding of AIM [t]hat the symbology presented in this
specification is entirely in the public domain and free of all use restrictions,
licenses and fees. AIM USA, its memer companies, or individual officers
licenses and fees. AIM USA, its member companies, or individual officers
assume no liability for the use of this document." */
void CheckCharacter() {
@ -591,3 +592,98 @@ int channel_code(struct zint_symbol *symbol, unsigned char source[], int length)
}
/* Vehicle Identification Number (VIN) */
int vin(struct zint_symbol *symbol, unsigned char source[], int length) {
/* This code verifies the check digit present in North American VIN codes */
int zeros;
char local_source[18];
char dest[200];
char input_check;
char output_check;
int value[17];
int weight[17] = {8, 7, 6, 5, 4, 3, 2, 10, 0, 9, 8, 7, 6, 5, 4, 3, 2};
int sum;
int i;
// Check length
if (length > 17) {
strcpy(symbol->errtxt, "336: Input too long");
return ZINT_ERROR_TOO_LONG;
}
// Check input characters, I, O and Q are not allowed
if (is_sane(ARSENIC, source, length) == ZINT_ERROR_INVALID_DATA) {
strcpy(symbol->errtxt, "337: Invalid characters in input data");
return ZINT_ERROR_INVALID_DATA;
}
// Pad with zeros
zeros = 17 - length;
for (i = 0; i < 17; i++) {
local_source[i] = '0';
}
local_source[17] = '\0';
for (i = 0; i < length; i++) {
local_source[zeros + i] = source[i];
}
input_check = local_source[8];
for (i = 0; i < 17; i++) {
if ((local_source[i] >= '0') && (local_source[i] <= '9')) {
value[i] = local_source[i] - '0';
}
if ((local_source[i] >= 'A') && (local_source[i] <= 'I')) {
value[i] = (local_source[i] - 'A') + 1;
}
if ((local_source[i] >= 'J') && (local_source[i] <= 'R')) {
value[i] = (local_source[i] - 'J') + 1;
}
if ((local_source[i] >= 'S') && (local_source[i] <= 'Z')) {
value[i] = (local_source[i] - 'S') + 2;
}
}
sum = 0;
for (i = 0; i < 17; i++) {
sum += value[i] * weight[i];
}
output_check = '0' + (sum % 11);
if (output_check == ':') {
// Check digit was 10
output_check = 'X';
}
if (symbol->debug) {
printf("Producing VIN code: %s\n", local_source);
printf("Input check was %c, calculated check is %c\n", input_check, output_check);
}
if (input_check != output_check) {
strcpy(symbol->errtxt, "338: Invalid check digit in input data");
return ZINT_ERROR_INVALID_DATA;
}
/* Start character */
strcpy(dest, "1211212111");
// Copy glyphs to symbol
for (i = 0; i < 17; i++) {
lookup(SILVER, C39Table, local_source[i], dest);
}
/* Stop character */
strcat(dest, "121121211");
ustrcpy(symbol->text, (unsigned char *) local_source);
expand(symbol, dest);
return 0;
}