/*
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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 "ZXBitMatrix.h"
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#import "ZXBoolArray.h"
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#import "ZXCode39Reader.h"
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#import "ZXCode39Writer.h"
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#import "ZXIntArray.h"
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@implementation ZXCode39Writer
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- (ZXBitMatrix *)encode:(NSString *)contents format:(ZXBarcodeFormat)format width:(int)width height:(int)height hints:(ZXEncodeHints *)hints error:(NSError **)error {
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if (format != kBarcodeFormatCode39) {
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[NSException raise:NSInvalidArgumentException format:@"Can only encode CODE_39."];
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}
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return [super encode:contents format:format width:width height:height hints:hints error:error];
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}
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- (ZXBoolArray *)encode:(NSString *)contents {
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int length = (int)[contents length];
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if (length > 80) {
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[NSException raise:NSInvalidArgumentException
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format:@"Requested contents should be less than 80 digits long, but got %d", length];
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}
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ZXIntArray *widths = [[ZXIntArray alloc] initWithLength:9];
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int codeWidth = 24 + 1 + length;
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for (int i = 0; i < length; i++) {
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NSUInteger indexInString = [ZX_CODE39_ALPHABET_STRING rangeOfString:[contents substringWithRange:NSMakeRange(i, 1)]].location;
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if (indexInString == NSNotFound) {
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[NSException raise:NSInvalidArgumentException format:@"Bad contents: %@", contents];
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}
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[self toIntArray:ZX_CODE39_CHARACTER_ENCODINGS[indexInString] toReturn:widths];
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codeWidth += [widths sum];
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}
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ZXBoolArray *result = [[ZXBoolArray alloc] initWithLength:codeWidth];
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[self toIntArray:ZX_CODE39_CHARACTER_ENCODINGS[39] toReturn:widths];
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int pos = [self appendPattern:result pos:0 pattern:widths.array patternLen:widths.length startColor:YES];
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ZXIntArray *narrowWhite = [[ZXIntArray alloc] initWithInts:1, -1];
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pos += [self appendPattern:result pos:pos pattern:narrowWhite.array patternLen:narrowWhite.length startColor:NO];
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//append next character to byte matrix
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for (int i = 0; i < length; i++) {
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NSUInteger indexInString = [ZX_CODE39_ALPHABET_STRING rangeOfString:[contents substringWithRange:NSMakeRange(i, 1)]].location;
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[self toIntArray:ZX_CODE39_CHARACTER_ENCODINGS[indexInString] toReturn:widths];
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pos += [self appendPattern:result pos:pos pattern:widths.array patternLen:widths.length startColor:YES];
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pos += [self appendPattern:result pos:pos pattern:narrowWhite.array patternLen:narrowWhite.length startColor:NO];
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}
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[self toIntArray:ZX_CODE39_CHARACTER_ENCODINGS[39] toReturn:widths];
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[self appendPattern:result pos:pos pattern:widths.array patternLen:widths.length startColor:YES];
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return result;
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}
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- (void)toIntArray:(int)a toReturn:(ZXIntArray *)toReturn {
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for (int i = 0; i < 9; i++) {
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int temp = a & (1 << (8 - i));
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toReturn.array[i] = temp == 0 ? 1 : 2;
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}
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}
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@end
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