import BitArray from '../common/BitArray';
|
import DecodeHintType from '../DecodeHintType';
|
import OneDReader from './OneDReader';
|
import Result from '../Result';
|
/**
|
* <p>Decodes Code 39 barcodes. Supports "Full ASCII Code 39" if USE_CODE_39_EXTENDED_MODE is set.</p>
|
*
|
* @author Sean Owen
|
* @see Code93Reader
|
*/
|
export default class Code39Reader extends OneDReader {
|
private static readonly ALPHABET_STRING;
|
/**
|
* These represent the encodings of characters, as patterns of wide and narrow bars.
|
* The 9 least-significant bits of each int correspond to the pattern of wide and narrow,
|
* with 1s representing "wide" and 0s representing narrow.
|
*/
|
private static readonly CHARACTER_ENCODINGS;
|
private static readonly ASTERISK_ENCODING;
|
private usingCheckDigit;
|
private extendedMode;
|
private decodeRowResult;
|
private counters;
|
/**
|
* Creates a reader that assumes all encoded data is data, and does not treat the final
|
* character as a check digit. It will not decoded "extended Code 39" sequences.
|
*/
|
/**
|
* Creates a reader that can be configured to check the last character as a check digit.
|
* It will not decoded "extended Code 39" sequences.
|
*
|
* @param usingCheckDigit if true, treat the last data character as a check digit, not
|
* data, and verify that the checksum passes.
|
*/
|
/**
|
* Creates a reader that can be configured to check the last character as a check digit,
|
* or optionally attempt to decode "extended Code 39" sequences that are used to encode
|
* the full ASCII character set.
|
*
|
* @param usingCheckDigit if true, treat the last data character as a check digit, not
|
* data, and verify that the checksum passes.
|
* @param extendedMode if true, will attempt to decode extended Code 39 sequences in the
|
* text.
|
*/
|
constructor(usingCheckDigit?: boolean, extendedMode?: boolean);
|
decodeRow(rowNumber: number, row: BitArray, hints?: Map<DecodeHintType, any>): Result;
|
private static findAsteriskPattern;
|
private static toNarrowWidePattern;
|
private static patternToChar;
|
private static decodeExtended;
|
}
|