/*
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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 "ZXQRCodeErrorCorrectionLevel.h"
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@implementation ZXQRCodeErrorCorrectionLevel
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static NSArray *FOR_BITS = nil;
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- (id)initWithOrdinal:(int)ordinal bits:(int)bits name:(NSString *)name {
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if (self = [super init]) {
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_ordinal = ordinal;
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_bits = bits;
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_name = name;
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}
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return self;
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}
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- (NSString *)description {
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return self.name;
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}
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+ (ZXQRCodeErrorCorrectionLevel *)forBits:(int)bits {
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if (!FOR_BITS) {
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FOR_BITS = @[[ZXQRCodeErrorCorrectionLevel errorCorrectionLevelM], [ZXQRCodeErrorCorrectionLevel errorCorrectionLevelL],
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[ZXQRCodeErrorCorrectionLevel errorCorrectionLevelH], [ZXQRCodeErrorCorrectionLevel errorCorrectionLevelQ]];
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}
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if (bits < 0 || bits >= [FOR_BITS count]) {
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@throw [NSException exceptionWithName:NSInvalidArgumentException
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reason:@"Invalid bits"
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userInfo:nil];
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}
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return FOR_BITS[bits];
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}
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+ (ZXQRCodeErrorCorrectionLevel *)errorCorrectionLevelL {
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static ZXQRCodeErrorCorrectionLevel *thisLevel = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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thisLevel = [[ZXQRCodeErrorCorrectionLevel alloc] initWithOrdinal:0 bits:0x01 name:@"L"];
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});
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return thisLevel;
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}
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+ (ZXQRCodeErrorCorrectionLevel *)errorCorrectionLevelM {
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static ZXQRCodeErrorCorrectionLevel *thisLevel = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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thisLevel = [[ZXQRCodeErrorCorrectionLevel alloc] initWithOrdinal:1 bits:0x00 name:@"M"];
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});
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return thisLevel;
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}
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+ (ZXQRCodeErrorCorrectionLevel *)errorCorrectionLevelQ {
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static ZXQRCodeErrorCorrectionLevel *thisLevel = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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thisLevel = [[ZXQRCodeErrorCorrectionLevel alloc] initWithOrdinal:2 bits:0x03 name:@"Q"];
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});
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return thisLevel;
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}
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+ (ZXQRCodeErrorCorrectionLevel *)errorCorrectionLevelH {
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static ZXQRCodeErrorCorrectionLevel *thisLevel = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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thisLevel = [[ZXQRCodeErrorCorrectionLevel alloc] initWithOrdinal:3 bits:0x02 name:@"H"];
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});
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return thisLevel;
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}
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@end
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