/*
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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 "ZXUPCEANExtensionSupport.h"
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#import "ZXUPCEANExtension2Support.h"
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#import "ZXUPCEANExtension5Support.h"
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#import "ZXUPCEANReader.h"
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const int ZX_UPCEAN_EXTENSION_START_PATTERN[] = {1,1,2};
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@interface ZXUPCEANExtensionSupport ()
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@property (nonatomic, strong, readonly) ZXUPCEANExtension2Support *twoSupport;
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@property (nonatomic, strong, readonly) ZXUPCEANExtension5Support *fiveSupport;
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@end
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@implementation ZXUPCEANExtensionSupport
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- (id)init {
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if (self = [super init]) {
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_twoSupport = [[ZXUPCEANExtension2Support alloc] init];
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_fiveSupport = [[ZXUPCEANExtension5Support alloc] init];
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}
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return self;
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}
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- (ZXResult *)decodeRow:(int)rowNumber row:(ZXBitArray *)row rowOffset:(int)rowOffset error:(NSError **)error {
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NSRange extensionStartRange = [ZXUPCEANReader findGuardPattern:row
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rowOffset:rowOffset
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whiteFirst:NO
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pattern:ZX_UPCEAN_EXTENSION_START_PATTERN
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patternLen:sizeof(ZX_UPCEAN_EXTENSION_START_PATTERN)/sizeof(int)
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error:error];
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if (extensionStartRange.location == NSNotFound) {
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return nil;
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}
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ZXResult *result = [self.fiveSupport decodeRow:rowNumber row:row extensionStartRange:extensionStartRange error:error];
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if (!result) {
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result = [self.twoSupport decodeRow:rowNumber row:row extensionStartRange:extensionStartRange error:error];
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}
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return result;
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}
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@end
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