/*
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* Copyright 2014 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import "ZXVINParsedResult.h"
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#import "ZXVINResultParser.h"
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static NSRegularExpression *ZX_IOQ = nil;
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static NSRegularExpression *ZX_AZ09 = nil;
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@implementation ZXVINResultParser
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+ (void)initialize {
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if ([self class] != [ZXVINResultParser class]) return;
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ZX_IOQ = [[NSRegularExpression alloc] initWithPattern:@"[IOQ]" options:0 error:nil];
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ZX_AZ09 = [[NSRegularExpression alloc] initWithPattern:@"[A-Z0-9]{17}" options:0 error:nil];
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}
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- (ZXVINParsedResult *)parse:(ZXResult *)result {
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if (result.barcodeFormat != kBarcodeFormatCode39) {
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return nil;
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}
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NSString *rawText = result.text;
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rawText = [[ZX_IOQ stringByReplacingMatchesInString:rawText options:0 range:NSMakeRange(0, rawText.length) withTemplate:@""] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
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if ([ZX_AZ09 matchesInString:rawText options:0 range:NSMakeRange(0, rawText.length)] == 0) {
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return nil;
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}
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if (![self checkChecksum:rawText]) {
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return nil;
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}
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int modelYear = [self modelYear:[rawText characterAtIndex:9]];
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if (modelYear == -1) {
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return nil;
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}
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NSString *wmi = [rawText substringToIndex:3];
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return [[ZXVINParsedResult alloc] initWithVIN:rawText
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worldManufacturerID:wmi
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vehicleDescriptorSection:[rawText substringWithRange:NSMakeRange(3, 6)]
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vehicleIdentifierSection:[rawText substringWithRange:NSMakeRange(9, 8)]
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countryCode:[self countryCode:wmi]
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vehicleAttributes:[rawText substringWithRange:NSMakeRange(3, 5)]
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modelYear:modelYear
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plantCode:[rawText characterAtIndex:10]
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sequentialNumber:[rawText substringFromIndex:11]];
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}
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- (BOOL)checkChecksum:(NSString *)vin {
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int sum = 0;
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for (int i = 0; i < [vin length]; i++) {
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int vinPositionWeight = [self vinPositionWeight:i + 1];
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if (vinPositionWeight == -1) {
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return NO;
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}
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int vinCharValue = [self vinCharValue:[vin characterAtIndex:i]];
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if (vinCharValue == -1) {
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return NO;
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}
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sum += vinPositionWeight * vinCharValue;
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}
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unichar checkChar = [vin characterAtIndex:8];
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if (checkChar == '\0') {
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return NO;
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}
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unichar expectedCheckChar = [self checkChar:sum % 11];
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return checkChar == expectedCheckChar;
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}
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- (int)vinCharValue:(unichar)c {
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if (c >= 'A' && c <= 'I') {
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return (c - 'A') + 1;
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}
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if (c >= 'J' && c <= 'R') {
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return (c - 'J') + 1;
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}
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if (c >= 'S' && c <= 'Z') {
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return (c - 'S') + 2;
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}
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if (c >= '0' && c <= '9') {
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return c - '0';
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}
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return -1;
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}
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- (int)vinPositionWeight:(int)position {
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if (position >= 1 && position <= 7) {
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return 9 - position;
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}
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if (position == 8) {
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return 10;
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}
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if (position == 9) {
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return 0;
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}
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if (position >= 10 && position <= 17) {
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return 19 - position;
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}
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return -1;
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}
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- (unichar)checkChar:(int)remainder {
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if (remainder < 10) {
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return (unichar) ('0' + remainder);
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}
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if (remainder == 10) {
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return 'X';
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}
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return '\0';
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}
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- (int)modelYear:(unichar)c {
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if (c >= 'E' && c <= 'H') {
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return (c - 'E') + 1984;
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}
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if (c >= 'J' && c <= 'N') {
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return (c - 'J') + 1988;
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}
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if (c == 'P') {
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return 1993;
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}
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if (c >= 'R' && c <= 'T') {
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return (c - 'R') + 1994;
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}
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if (c >= 'V' && c <= 'Y') {
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return (c - 'V') + 1997;
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}
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if (c >= '1' && c <= '9') {
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return (c - '1') + 2001;
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}
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if (c >= 'A' && c <= 'D') {
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return (c - 'A') + 2010;
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}
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return -1;
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}
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- (NSString *)countryCode:(NSString *)wmi {
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unichar c1 = [wmi characterAtIndex:0];
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unichar c2 = [wmi characterAtIndex:1];
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switch (c1) {
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case '1':
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case '4':
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case '5':
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return @"US";
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case '2':
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return @"CA";
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case '3':
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if (c2 >= 'A' && c2 <= 'W') {
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return @"MX";
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}
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break;
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case '9':
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if ((c2 >= 'A' && c2 <= 'E') || (c2 >= '3' && c2 <= '9')) {
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return @"BR";
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}
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break;
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case 'J':
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if (c2 >= 'A' && c2 <= 'T') {
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return @"JP";
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}
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break;
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case 'K':
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if (c2 >= 'L' && c2 <= 'R') {
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return @"KO";
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}
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break;
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case 'L':
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return @"CN";
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case 'M':
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if (c2 >= 'A' && c2 <= 'E') {
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return @"IN";
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}
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break;
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case 'S':
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if (c2 >= 'A' && c2 <= 'M') {
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return @"UK";
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}
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if (c2 >= 'N' && c2 <= 'T') {
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return @"DE";
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}
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break;
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case 'V':
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if (c2 >= 'F' && c2 <= 'R') {
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return @"FR";
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}
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if (c2 >= 'S' && c2 <= 'W') {
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return @"ES";
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}
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break;
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case 'W':
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return @"DE";
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case 'X':
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if (c2 == '0' || (c2 >= '3' && c2 <= '9')) {
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return @"RU";
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}
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break;
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case 'Z':
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if (c2 >= 'A' && c2 <= 'R') {
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return @"IT";
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}
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break;
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}
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return nil;
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}
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@end
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