/*
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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 "ZXBitArray.h"
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#import "ZXBitArrayBuilder.h"
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#import "ZXRSSDataCharacter.h"
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#import "ZXRSSExpandedPair.h"
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@implementation ZXBitArrayBuilder
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+ (ZXBitArray *)buildBitArray:(NSArray *)pairs {
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int charNumber = ((int)[pairs count] * 2) - 1;
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if ([pairs[pairs.count - 1] rightChar] == nil) {
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charNumber -= 1;
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}
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int size = 12 * charNumber;
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ZXBitArray *binary = [[ZXBitArray alloc] initWithSize:size];
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int accPos = 0;
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ZXRSSExpandedPair *firstPair = pairs[0];
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int firstValue = [[firstPair rightChar] value];
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for (int i = 11; i >= 0; --i) {
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if ((firstValue & (1 << i)) != 0) {
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[binary set:accPos];
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}
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accPos++;
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}
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for (int i = 1; i < [pairs count]; ++i) {
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ZXRSSExpandedPair *currentPair = pairs[i];
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int leftValue = [[currentPair leftChar] value];
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for (int j = 11; j >= 0; --j) {
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if ((leftValue & (1 << j)) != 0) {
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[binary set:accPos];
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}
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accPos++;
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}
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if ([currentPair rightChar] != nil) {
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int rightValue = [[currentPair rightChar] value];
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for (int j = 11; j >= 0; --j) {
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if ((rightValue & (1 << j)) != 0) {
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[binary set:accPos];
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}
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accPos++;
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}
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}
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}
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return binary;
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}
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@end
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