/*
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* Copyright 2012 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 "ZXAI013x0x1xDecoder.h"
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#import "ZXBitArray.h"
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#import "ZXErrors.h"
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#import "ZXRSSExpandedGeneralAppIdDecoder.h"
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const int ZX_AI013x0x1x_HEADER_SIZE = 7 + 1;
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const int ZX_AI013x0x1x_WEIGHT_SIZE = 20;
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const int ZX_AI013x0x1x_DATE_SIZE = 16;
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@interface ZXAI013x0x1xDecoder ()
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@property (nonatomic, copy, readonly) NSString *dateCode;
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@property (nonatomic, copy, readonly) NSString *firstAIdigits;
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@end
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@implementation ZXAI013x0x1xDecoder
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- (id)initWithInformation:(ZXBitArray *)information firstAIdigits:(NSString *)firstAIdigits dateCode:(NSString *)dateCode {
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if (self = [super initWithInformation:information]) {
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_dateCode = dateCode;
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_firstAIdigits = firstAIdigits;
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}
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return self;
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}
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- (NSString *)parseInformationWithError:(NSError **)error {
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if (self.information.size != ZX_AI013x0x1x_HEADER_SIZE + ZX_AI01_GTIN_SIZE + ZX_AI013x0x1x_WEIGHT_SIZE + ZX_AI013x0x1x_DATE_SIZE) {
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if (error) *error = ZXNotFoundErrorInstance();
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return nil;
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}
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NSMutableString *buf = [NSMutableString string];
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[self encodeCompressedGtin:buf currentPos:ZX_AI013x0x1x_HEADER_SIZE];
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[self encodeCompressedWeight:buf currentPos:ZX_AI013x0x1x_HEADER_SIZE + ZX_AI01_GTIN_SIZE weightSize:ZX_AI013x0x1x_WEIGHT_SIZE];
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[self encodeCompressedDate:buf currentPos:ZX_AI013x0x1x_HEADER_SIZE + ZX_AI01_GTIN_SIZE + ZX_AI013x0x1x_WEIGHT_SIZE];
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return buf;
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}
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- (void)encodeCompressedDate:(NSMutableString *)buf currentPos:(int)currentPos {
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int numericDate = [self.generalDecoder extractNumericValueFromBitArray:currentPos bits:ZX_AI013x0x1x_DATE_SIZE];
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if (numericDate == 38400) {
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return;
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}
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[buf appendFormat:@"(%@)", self.dateCode];
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int day = numericDate % 32;
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numericDate /= 32;
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int month = numericDate % 12 + 1;
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numericDate /= 12;
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int year = numericDate;
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if (year / 10 == 0) {
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[buf appendString:@"0"];
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}
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[buf appendFormat:@"%d", year];
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if (month / 10 == 0) {
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[buf appendString:@"0"];
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}
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[buf appendFormat:@"%d", month];
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if (day / 10 == 0) {
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[buf appendString:@"0"];
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}
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[buf appendFormat:@"%d", day];
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}
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- (void)addWeightCode:(NSMutableString *)buf weight:(int)weight {
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int lastAI = weight / 100000;
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[buf appendFormat:@"(%@%d)", self.firstAIdigits, lastAI];
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}
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- (int)checkWeight:(int)weight {
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return weight % 100000;
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}
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@end
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